Move queue declaration to project level

This moves the watcher queue declaration from the pipeline level (where it is no longer valid) to the project level. https: //lists.openstack.org/pipermail/openstack-discuss/2022-May/028603.html Change-Id: I06923abb00f7eecd59587f44cd1f6a069e88a9fc (cherry picked from commit 6003322711)
Merge "Update .gitreview for stable/wallaby" into stable/wallaby
2023-08-19 07:30:15 +00:00 · 2021-07-01 13:32:11 +00:00 · 2021-07-01 11:44:53 +00:00 · 2021-07-01 11:44:34 +00:00 · 2021-07-01 09:11:58 +00:00
95 changed files with 930 additions and 1956 deletions
--- a/.gitreview
+++ b/.gitreview
@@ -2,3 +2,4 @@
 host=review.opendev.org
 port=29418
 project=openstack/watcher.git
+defaultbranch=stable/wallaby
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -3,7 +3,7 @@
    templates:
      - check-requirements
      - openstack-cover-jobs
-      - openstack-python3-jobs
+      - openstack-python3-wallaby-jobs
      - publish-openstack-docs-pti
      - release-notes-jobs-python3
    check:
@@ -13,6 +13,7 @@
        - watcher-tempest-strategies
        - watcher-tempest-actuator
        - watcherclient-tempest-functional
+        - watcher-tls-test
        - watcher-tempest-functional-ipv6-only
    gate:
      jobs:
@@ -86,10 +87,21 @@
      tempest_concurrency: 1
      tempest_test_regex: watcher_tempest_plugin.tests.scenario.test_execute_strategies

+- job:
+    name: watcher-tls-test
+    parent: watcher-tempest-multinode
+    group-vars:
+      subnode:
+          devstack_services:
+            tls-proxy: true
+    vars:
+      devstack_services:
+        tls-proxy: true
+
 - job:
    name: watcher-tempest-multinode
    parent: watcher-tempest-functional
-    nodeset: openstack-two-node-jammy
+    nodeset: openstack-two-node-focal
    roles:
      - zuul: openstack/tempest
    group-vars:
@@ -107,7 +119,8 @@
          watcher-api: false
          watcher-decision-engine: true
          watcher-applier: false
-          c-bak: false
+          # We need to add TLS support for watcher plugin
+          tls-proxy: false
          ceilometer: false
          ceilometer-acompute: false
          ceilometer-acentral: false
@@ -155,6 +168,7 @@
      devstack_plugins:
        watcher: https://opendev.org/openstack/watcher
      devstack_services:
+        tls-proxy: false
        watcher-api: true
        watcher-decision-engine: true
        watcher-applier: true
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -56,8 +56,8 @@ source_suffix = '.rst'
 master_doc = 'index'

 # General information about the project.
-project = 'Watcher'
-copyright = 'OpenStack Foundation'
+project = u'Watcher'
+copyright = u'OpenStack Foundation'

 # A list of ignored prefixes for module index sorting.
 modindex_common_prefix = ['watcher.']
@@ -91,14 +91,14 @@ pygments_style = 'native'
 # List of tuples 'sourcefile', 'target', u'title', u'Authors name', 'manual'

 man_pages = [
-    ('man/watcher-api', 'watcher-api', 'Watcher API Server',
-     ['OpenStack'], 1),
-    ('man/watcher-applier', 'watcher-applier', 'Watcher Applier',
-     ['OpenStack'], 1),
+    ('man/watcher-api', 'watcher-api', u'Watcher API Server',
+     [u'OpenStack'], 1),
+    ('man/watcher-applier', 'watcher-applier', u'Watcher Applier',
+     [u'OpenStack'], 1),
    ('man/watcher-db-manage', 'watcher-db-manage',
-     'Watcher Db Management Utility', ['OpenStack'], 1),
+     u'Watcher Db Management Utility', [u'OpenStack'], 1),
    ('man/watcher-decision-engine', 'watcher-decision-engine',
-     'Watcher Decision Engine', ['OpenStack'], 1),
+     u'Watcher Decision Engine', [u'OpenStack'], 1),
 ]

 # -- Options for HTML output --------------------------------------------------
@@ -128,8 +128,8 @@ openstackdocs_bug_tag = ''
 latex_documents = [
    ('index',
     'doc-watcher.tex',
-     'Watcher Documentation',
-     'OpenStack Foundation', 'manual'),
+     u'Watcher Documentation',
+     u'OpenStack Foundation', 'manual'),
 ]

 # If false, no module index is generated.
--- a/doc/source/configuration/configuring.rst
+++ b/doc/source/configuration/configuring.rst
@@ -372,7 +372,7 @@ You can configure and install Ceilometer by following the documentation below :
 #. https://docs.openstack.org/ceilometer/latest

 The built-in strategy 'basic_consolidation' provided by watcher requires
-"**compute.node.cpu.percent**" and "**cpu**" measurements to be collected
+"**compute.node.cpu.percent**" and "**cpu_util**" measurements to be collected
 by Ceilometer.
 The measurements available depend on the hypervisors that OpenStack manages on
 the specific implementation.
--- a/doc/source/contributor/devstack.rst
+++ b/doc/source/contributor/devstack.rst
@@ -47,8 +47,6 @@ unavailable as well as `instance_l3_cpu_cache`::
        [[local|localrc]]
        enable_plugin watcher https://opendev.org/openstack/watcher

-        enable_plugin watcher-dashboard https://opendev.org/openstack/watcher-dashboard
-
        enable_plugin ceilometer https://opendev.org/openstack/ceilometer.git
        CEILOMETER_BACKEND=gnocchi

--- a/doc/source/contributor/plugin/strategy-plugin.rst
+++ b/doc/source/contributor/plugin/strategy-plugin.rst
@@ -300,6 +300,6 @@ Using that you can now query the values for that specific metric:
 .. code-block:: py

    avg_meter = self.datasource_backend.statistic_aggregation(
-        instance.uuid, 'instance_cpu_usage', self.periods['instance'],
+        instance.uuid, 'cpu_util', self.periods['instance'],
        self.granularity,
        aggregation=self.aggregation_method['instance'])
--- a/doc/source/strategies/basic-server-consolidation.rst
+++ b/doc/source/strategies/basic-server-consolidation.rst
@@ -26,7 +26,8 @@ metric                       service name plugins comment
                                                  ``compute_monitors`` option
                                                  to ``cpu.virt_driver`` in
                                                  the nova.conf.
-``cpu``                      ceilometer_  none
+``cpu_util``                 ceilometer_  none    cpu_util has been removed
+                                                  since Stein.
 ============================ ============ ======= ===========================

 .. _ceilometer: https://docs.openstack.org/ceilometer/latest/admin/telemetry-measurements.html#openstack-compute
--- a/doc/source/strategies/saving_energy.rst
+++ b/doc/source/strategies/saving_energy.rst
@@ -89,9 +89,9 @@ step 2: Create audit to do optimization
 .. code-block:: shell

    $ openstack optimize audittemplate create \
-      saving_energy_template1 saving_energy --strategy saving_energy
+      at1 saving_energy --strategy saving_energy

-    $ openstack optimize audit create -a saving_energy_audit1 \
+    $ openstack optimize audit create -a at1 \
      -p free_used_percent=20.0

 External Links
--- a/doc/source/strategies/vm_workload_consolidation.rst
+++ b/doc/source/strategies/vm_workload_consolidation.rst
@@ -22,19 +22,14 @@ The *vm_workload_consolidation* strategy requires the following metrics:
 ============================ ============ ======= =========================
 metric                       service name plugins comment
 ============================ ============ ======= =========================
-``cpu``                      ceilometer_  none
+``cpu_util``                 ceilometer_  none    cpu_util has been removed
+                                                  since Stein.
 ``memory.resident``          ceilometer_  none
 ``memory``                   ceilometer_  none
 ``disk.root.size``           ceilometer_  none
-``compute.node.cpu.percent`` ceilometer_  none    (optional) need to set the
-                                                  ``compute_monitors`` option
-                                                  to ``cpu.virt_driver`` in the
-                                                  nova.conf.
-``hardware.memory.used``     ceilometer_  SNMP_   (optional)
 ============================ ============ ======= =========================

 .. _ceilometer: https://docs.openstack.org/ceilometer/latest/admin/telemetry-measurements.html#openstack-compute
-.. _SNMP: https://docs.openstack.org/ceilometer/latest/admin/telemetry-measurements.html#snmp-based-meters

 Cluster data model
 ******************
--- a/doc/source/strategies/workload-stabilization.rst
+++ b/doc/source/strategies/workload-stabilization.rst
@@ -27,8 +27,9 @@ metric                       service name plugins comment
                                                  to ``cpu.virt_driver`` in the
                                                  nova.conf.
 ``hardware.memory.used``     ceilometer_  SNMP_
-``cpu``                      ceilometer_  none
-``instance_ram_usage``       ceilometer_  none
+``cpu_util``                 ceilometer_  none    cpu_util has been removed
+                                                  since Stein.
+``memory.resident``          ceilometer_  none
 ============================ ============ ======= =============================

 .. _ceilometer: https://docs.openstack.org/ceilometer/latest/admin/telemetry-measurements.html#openstack-compute
@@ -106,10 +107,10 @@ parameter            type   default Value         description
                                                  period of all received ones.
 ==================== ====== ===================== =============================

-.. |metrics| replace:: ["instance_cpu_usage", "instance_ram_usage"]
-.. |thresholds| replace:: {"instance_cpu_usage": 0.2, "instance_ram_usage": 0.2}
-.. |weights| replace:: {"instance_cpu_usage_weight": 1.0, "instance_ram_usage_weight": 1.0}
-.. |instance_metrics| replace:: {"instance_cpu_usage": "compute.node.cpu.percent", "instance_ram_usage": "hardware.memory.used"}
+.. |metrics| replace:: ["cpu_util", "memory.resident"]
+.. |thresholds| replace:: {"cpu_util": 0.2, "memory.resident": 0.2}
+.. |weights| replace:: {"cpu_util_weight": 1.0, "memory.resident_weight": 1.0}
+.. |instance_metrics| replace:: {"cpu_util": "compute.node.cpu.percent", "memory.resident": "hardware.memory.used"}
 .. |periods| replace:: {"instance": 720, "node": 600}

 Efficacy Indicator
@@ -135,8 +136,8 @@ How to use it ?
      at1 workload_balancing --strategy workload_stabilization

    $ openstack optimize audit create -a at1 \
-      -p thresholds='{"instance_ram_usage": 0.05}' \
-      -p metrics='["instance_ram_usage"]'
+      -p thresholds='{"memory.resident": 0.05}' \
+      -p metrics='["memory.resident"]'

 External Links
 --------------
--- a/doc/source/strategies/workload_balance.rst
+++ b/doc/source/strategies/workload_balance.rst
@@ -24,7 +24,8 @@ The *workload_balance* strategy requires the following metrics:
 ======================= ============ ======= =========================
 metric                  service name plugins comment
 ======================= ============ ======= =========================
-``cpu``                 ceilometer_  none
+``cpu_util``            ceilometer_  none    cpu_util has been removed
+                                             since Stein.
 ``memory.resident``     ceilometer_  none
 ======================= ============ ======= =========================

@@ -64,16 +65,15 @@ Configuration

 Strategy parameters are:

-============== ====== ==================== ====================================
-parameter      type   default Value        description
-============== ====== ==================== ====================================
-``metrics``    String 'instance_cpu_usage' Workload balance base on cpu or ram
-                                           utilization. Choices:
-                                           ['instance_cpu_usage',
-                                           'instance_ram_usage']
-``threshold``  Number 25.0                 Workload threshold for migration
-``period``     Number 300                  Aggregate time period of ceilometer
-============== ====== ==================== ====================================
+============== ====== ============= ====================================
+parameter      type   default Value description
+============== ====== ============= ====================================
+``metrics``    String 'cpu_util'    Workload balance base on cpu or ram
+                                    utilization. choice: ['cpu_util',
+                                    'memory.resident']
+``threshold``  Number 25.0          Workload threshold for migration
+``period``     Number 300           Aggregate time period of ceilometer
+============== ====== ============= ====================================

 Efficacy Indicator
 ------------------
@@ -95,7 +95,7 @@ How to use it ?
      at1 workload_balancing --strategy workload_balance

    $ openstack optimize audit create -a at1 -p threshold=26.0 \
-            -p period=310 -p metrics=instance_cpu_usage
+            -p period=310 -p metrics=cpu_util

 External Links
 --------------
--- a/releasenotes/source/2023.1.rst
+++ b/releasenotes/source/2023.1.rst
@@ -1,6 +0,0 @@
-===========================
-2023.1 Series Release Notes
-===========================
-
-.. release-notes::
-   :branch: stable/2023.1
--- a/releasenotes/source/2023.2.rst
+++ b/releasenotes/source/2023.2.rst
@@ -1,6 +0,0 @@
-===========================
-2023.2 Series Release Notes
-===========================
-
-.. release-notes::
-   :branch: stable/2023.2
--- a/releasenotes/source/conf.py
+++ b/releasenotes/source/conf.py
@@ -53,7 +53,7 @@ source_suffix = '.rst'
 master_doc = 'index'

 # General information about the project.
-copyright = '2016, Watcher developers'
+copyright = u'2016, Watcher developers'

 # Release notes are version independent
 # The short X.Y version.
@@ -196,8 +196,8 @@ latex_elements = {
 # Grouping the document tree into LaTeX files. List of tuples
 # (source start file, target name, title, author, documentclass [howto/manual])
 latex_documents = [
-  ('index', 'watcher.tex', 'Watcher Documentation',
-   'Watcher developers', 'manual'),
+  ('index', 'watcher.tex', u'Watcher Documentation',
+   u'Watcher developers', 'manual'),
 ]

 # The name of an image file (relative to this directory) to place at the top of
@@ -226,8 +226,8 @@ latex_documents = [
 # One entry per manual page. List of tuples
 # (source start file, name, description, authors, manual section).
 man_pages = [
-    ('index', 'watcher', 'Watcher Documentation',
-     ['Watcher developers'], 1)
+    ('index', 'watcher', u'Watcher Documentation',
+     [u'Watcher developers'], 1)
 ]

 # If true, show URL addresses after external links.
@@ -240,8 +240,8 @@ man_pages = [
 # (source start file, target name, title, author,
 #  dir menu entry, description, category)
 texinfo_documents = [
-  ('index', 'watcher', 'Watcher Documentation',
-   'Watcher developers', 'watcher', 'One line description of project.',
+  ('index', 'watcher', u'Watcher Documentation',
+   u'Watcher developers', 'watcher', 'One line description of project.',
   'Miscellaneous'),
 ]

--- a/releasenotes/source/index.rst
+++ b/releasenotes/source/index.rst
@@ -21,12 +21,6 @@ Contents:
   :maxdepth: 1

   unreleased
-   2023.2
-   2023.1
-   zed
-   yoga
-   xena
-   wallaby
   victoria
   ussuri
   train
--- a/releasenotes/source/locale/en_GB/LC_MESSAGES/releasenotes.po
+++ b/releasenotes/source/locale/en_GB/LC_MESSAGES/releasenotes.po
@@ -1,18 +1,15 @@
 # Andi Chandler <andi@gowling.com>, 2017. #zanata
 # Andi Chandler <andi@gowling.com>, 2018. #zanata
 # Andi Chandler <andi@gowling.com>, 2020. #zanata
-# Andi Chandler <andi@gowling.com>, 2022. #zanata
-# Andi Chandler <andi@gowling.com>, 2023. #zanata
-# Andi Chandler <andi@gowling.com>, 2024. #zanata
 msgid ""
 msgstr ""
 "Project-Id-Version: python-watcher\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2024-05-31 14:40+0000\n"
+"POT-Creation-Date: 2020-10-27 04:13+0000\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
-"PO-Revision-Date: 2024-04-18 12:21+0000\n"
+"PO-Revision-Date: 2020-10-28 11:13+0000\n"
 "Last-Translator: Andi Chandler <andi@gowling.com>\n"
 "Language-Team: English (United Kingdom)\n"
 "Language: en_GB\n"
@@ -61,21 +58,12 @@ msgstr "1.9.0"
 msgid "2.0.0"
 msgstr "2.0.0"

-msgid "2023.1 Series Release Notes"
-msgstr "2023.1 Series Release Notes"
-
-msgid "2023.2 Series Release Notes"
-msgstr "2023.2 Series Release Notes"
-
 msgid "3.0.0"
 msgstr "3.0.0"

 msgid "4.0.0"
 msgstr "4.0.0"

-msgid "6.0.0"
-msgstr "6.0.0"
-
 msgid "A ``watcher-status upgrade check`` has been added for this."
 msgstr "A ``watcher-status upgrade check`` has been added for this."

@@ -756,23 +744,6 @@ msgstr ""
 "The configuration options for query retries in `[gnocchi_client]` are "
 "deprecated and the option in `[watcher_datasources]` should now be used."

-msgid ""
-"The default value of ``[oslo_policy] policy_file`` config option has been "
-"changed from ``policy.json`` to ``policy.yaml``. Operators who are utilizing "
-"customized or previously generated static policy JSON files (which are not "
-"needed by default), should generate new policy files or convert them in YAML "
-"format. Use the `oslopolicy-convert-json-to-yaml <https://docs.openstack.org/"
-"oslo.policy/latest/cli/oslopolicy-convert-json-to-yaml.html>`_ tool to "
-"convert a JSON to YAML formatted policy file in backward compatible way."
-msgstr ""
-"The default value of ``[oslo_policy] policy_file`` config option has been "
-"changed from ``policy.json`` to ``policy.yaml``. Operators who are utilizing "
-"customized or previously generated static policy JSON files (which are not "
-"needed by default), should generate new policy files or convert them in YAML "
-"format. Use the `oslopolicy-convert-json-to-yaml <https://docs.openstack.org/"
-"oslo.policy/latest/cli/oslopolicy-convert-json-to-yaml.html>`_ tool to "
-"convert a JSON to YAML formatted policy file in backward compatible way."
-
 msgid ""
 "The graph model describes how VMs are associated to compute hosts. This "
 "allows for seeing relationships upfront between the entities and hence can "
@@ -828,21 +799,6 @@ msgstr "Train Series Release Notes"
 msgid "Upgrade Notes"
 msgstr "Upgrade Notes"

-msgid ""
-"Use of JSON policy files was deprecated by the ``oslo.policy`` library "
-"during the Victoria development cycle. As a result, this deprecation is "
-"being noted in the Wallaby cycle with an anticipated future removal of "
-"support by ``oslo.policy``. As such operators will need to convert to YAML "
-"policy files. Please see the upgrade notes for details on migration of any "
-"custom policy files."
-msgstr ""
-"Use of JSON policy files was deprecated by the ``oslo.policy`` library "
-"during the Victoria development cycle. As a result, this deprecation is "
-"being noted in the Wallaby cycle with an anticipated future removal of "
-"support by ``oslo.policy``. As such operators will need to convert to YAML "
-"policy files. Please see the upgrade notes for details on migration of any "
-"custom policy files."
-
 msgid ""
 "Using ``watcher/api/app.wsgi`` script is deprecated and it will be removed "
 "in U release. Please switch to automatically generated ``watcher-api-wsgi`` "
@@ -858,9 +814,6 @@ msgstr "Ussuri Series Release Notes"
 msgid "Victoria Series Release Notes"
 msgstr "Victoria Series Release Notes"

-msgid "Wallaby Series Release Notes"
-msgstr "Wallaby Series Release Notes"
-
 msgid ""
 "Watcher can continuously optimize the OpenStack cloud for a specific "
 "strategy or goal by triggering an audit periodically which generates an "
@@ -971,15 +924,6 @@ msgstr "We also add some new properties:"
 msgid "Welcome to watcher's Release Notes documentation!"
 msgstr "Welcome to watcher's Release Notes documentation!"

-msgid "Xena Series Release Notes"
-msgstr "Xena Series Release Notes"
-
-msgid "Yoga Series Release Notes"
-msgstr "Yoga Series Release Notes"
-
-msgid "Zed Series Release Notes"
-msgstr "Zed Series Release Notes"
-
 msgid "``[watcher_datasources] datasources = gnocchi,monasca,ceilometer``"
 msgstr "``[watcher_datasources] datasources = gnocchi,monasca,ceilometer``"

--- a/releasenotes/source/wallaby.rst
+++ b/releasenotes/source/wallaby.rst
@@ -1,6 +0,0 @@
-============================
-Wallaby Series Release Notes
-============================
-
-.. release-notes::
-   :branch: stable/wallaby
--- a/releasenotes/source/xena.rst
+++ b/releasenotes/source/xena.rst
@@ -1,6 +0,0 @@
-=========================
-Xena Series Release Notes
-=========================
-
-.. release-notes::
-   :branch: stable/xena
--- a/releasenotes/source/yoga.rst
+++ b/releasenotes/source/yoga.rst
@@ -1,6 +0,0 @@
-=========================
-Yoga Series Release Notes
-=========================
-
-.. release-notes::
-   :branch: stable/yoga
--- a/releasenotes/source/zed.rst
+++ b/releasenotes/source/zed.rst
@@ -1,6 +0,0 @@
-========================
-Zed Series Release Notes
-========================
-
-.. release-notes::
-   :branch: stable/zed
--- a/requirements.txt
+++ b/requirements.txt
@@ -17,7 +17,7 @@ oslo.context>=2.21.0 # Apache-2.0
 oslo.db>=4.44.0 # Apache-2.0
 oslo.i18n>=3.20.0 # Apache-2.0
 oslo.log>=3.37.0 # Apache-2.0
-oslo.messaging>=14.1.0 # Apache-2.0
+oslo.messaging>=8.1.2 # Apache-2.0
 oslo.policy>=3.6.0 # Apache-2.0
 oslo.reports>=1.27.0 # Apache-2.0
 oslo.serialization>=2.25.0 # Apache-2.0
@@ -30,6 +30,7 @@ pbr>=3.1.1 # Apache-2.0
 pecan>=1.3.2 # BSD
 PrettyTable>=0.7.2 # BSD
 gnocchiclient>=7.0.1 # Apache-2.0
+python-ceilometerclient>=2.9.0 # Apache-2.0
 python-cinderclient>=3.5.0 # Apache-2.0
 python-glanceclient>=2.9.1 # Apache-2.0
 python-keystoneclient>=3.15.0 # Apache-2.0
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,12 +1,12 @@
 [metadata]
 name = python-watcher
 summary = OpenStack Watcher provides a flexible and scalable resource optimization service for multi-tenant OpenStack-based clouds.
-description_file =
+description-file =
    README.rst
 author = OpenStack
-author_email = openstack-discuss@lists.openstack.org
-home_page = https://docs.openstack.org/watcher/latest/
-python_requires = >=3.8
+author-email = openstack-discuss@lists.openstack.org
+home-page = https://docs.openstack.org/watcher/latest/
+python-requires = >=3.6
 classifier =
    Environment :: OpenStack
    Intended Audience :: Information Technology
@@ -17,10 +17,9 @@ classifier =
    Programming Language :: Python :: Implementation :: CPython
    Programming Language :: Python :: 3 :: Only
    Programming Language :: Python :: 3
+    Programming Language :: Python :: 3.6
+    Programming Language :: Python :: 3.7
    Programming Language :: Python :: 3.8
-    Programming Language :: Python :: 3.9
-    Programming Language :: Python :: 3.10
-    Programming Language :: Python :: 3.11

 [files]
 packages =
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -7,9 +7,9 @@ doc8>=0.8.0 # Apache-2.0
 freezegun>=0.3.10 # Apache-2.0
 hacking>=3.0.1,<3.1.0 # Apache-2.0
 oslotest>=3.3.0 # Apache-2.0
+os-testr>=1.0.0 # Apache-2.0
 testscenarios>=0.5.0 # Apache-2.0/BSD
 testtools>=2.3.0 # MIT
 stestr>=2.0.0 # Apache-2.0
 os-api-ref>=1.4.0 # Apache-2.0
 bandit>=1.6.0 # Apache-2.0
-WebTest>=2.0.27 # MIT
--- a/tox.ini
+++ b/tox.ini
@@ -1,41 +1,37 @@
 [tox]
-minversion = 3.18.0
-envlist = py3,pep8
+minversion = 2.0
+envlist = py38,pep8
+skipsdist = True
 ignore_basepython_conflict = True

 [testenv]
 basepython = python3
 usedevelop = True
-allowlist_externals = find
+whitelist_externals = find
                      rm
-install_command = pip install -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master} {opts} {packages}
+install_command = pip install {opts} {packages}
 setenv =
   VIRTUAL_ENV={envdir}
 deps =
+    -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/wallaby}
    -r{toxinidir}/test-requirements.txt
    -r{toxinidir}/requirements.txt
-    python-libmaas>=0.6.8
 commands =
  rm -f .testrepository/times.dbm
  find . -type f -name "*.py[c|o]" -delete
  stestr run {posargs}
-passenv =
-  http_proxy
-  HTTP_PROXY
-  https_proxy
-  HTTPS_PROXY
-  no_proxy
-  NO_PROXY
+passenv = http_proxy HTTP_PROXY https_proxy HTTPS_PROXY no_proxy NO_PROXY

 [testenv:pep8]
 commands =
    doc8 doc/source/ CONTRIBUTING.rst HACKING.rst README.rst
    flake8
-    #bandit -r watcher -x watcher/tests/* -n5 -ll -s B320
+    bandit -r watcher -x watcher/tests/* -n5 -ll -s B320

 [testenv:venv]
 setenv = PYTHONHASHSEED=0
 deps =
+    -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/wallaby}
    -r{toxinidir}/doc/requirements.txt
    -r{toxinidir}/test-requirements.txt
    -r{toxinidir}/requirements.txt
@@ -54,6 +50,7 @@ commands =
 [testenv:docs]
 setenv = PYTHONHASHSEED=0
 deps =
+  -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
  -r{toxinidir}/doc/requirements.txt
 commands =
  rm -fr doc/build doc/source/api/ .autogenerated
@@ -61,7 +58,7 @@ commands =

 [testenv:api-ref]
 deps = -r{toxinidir}/doc/requirements.txt
-allowlist_externals = bash
+whitelist_externals = bash
 commands =
  bash -c 'rm -rf api-ref/build'
  sphinx-build -W --keep-going -b html -d api-ref/build/doctrees api-ref/source api-ref/build/html
@@ -78,28 +75,6 @@ commands =
 commands =
    oslopolicy-sample-generator --config-file etc/watcher/oslo-policy-generator/watcher-policy-generator.conf

-[testenv:wheel]
-commands = python setup.py bdist_wheel
-
-[testenv:pdf-docs]
-envdir = {toxworkdir}/docs
-deps = {[testenv:docs]deps}
-allowlist_externals =
-  rm
-  make
-commands =
-  rm -rf doc/build/pdf
-  sphinx-build -W --keep-going -b latex doc/source doc/build/pdf
-  make -C doc/build/pdf
-
-[testenv:releasenotes]
-deps = -r{toxinidir}/doc/requirements.txt
-commands = sphinx-build -a -W -E -d releasenotes/build/doctrees --keep-going -b html releasenotes/source releasenotes/build/html
-
-[testenv:bandit]
-deps = -r{toxinidir}/test-requirements.txt
-commands = bandit -r watcher -x watcher/tests/* -n5 -ll -s B320
-
 [flake8]
 filename = *.py,app.wsgi
 show-source=True
@@ -109,6 +84,9 @@ builtins= _
 enable-extensions = H106,H203,H904
 exclude=.venv,.git,.tox,dist,doc,*lib/python*,*egg,build,*sqlalchemy/alembic/versions/*,demo/,releasenotes

+[testenv:wheel]
+commands = python setup.py bdist_wheel
+
 [hacking]
 import_exceptions = watcher._i18n

@@ -132,7 +110,27 @@ extension =
   N366 = checks:import_stock_mock
 paths = ./watcher/hacking

+
 [doc8]
 extension=.rst
 # todo: stop ignoring doc/source/man when https://bugs.launchpad.net/doc8/+bug/1502391 is fixed
 ignore-path=doc/source/image_src,doc/source/man,doc/source/api
+
+[testenv:pdf-docs]
+envdir = {toxworkdir}/docs
+deps = {[testenv:docs]deps}
+whitelist_externals =
+  rm
+  make
+commands =
+  rm -rf doc/build/pdf
+  sphinx-build -W --keep-going -b latex doc/source doc/build/pdf
+  make -C doc/build/pdf
+
+[testenv:releasenotes]
+deps = -r{toxinidir}/doc/requirements.txt
+commands = sphinx-build -a -W -E -d releasenotes/build/doctrees --keep-going -b html releasenotes/source releasenotes/build/html
+
+[testenv:bandit]
+deps = -r{toxinidir}/test-requirements.txt
+commands = bandit -r watcher -x watcher/tests/* -n5 -ll -s B320
--- a/watcher/api/controllers/v1/action.py
+++ b/watcher/api/controllers/v1/action.py
@@ -57,7 +57,6 @@ are dynamically loaded by Watcher at launch time.

 import datetime

-from http import HTTPStatus
 import pecan
 from pecan import rest
 import wsme
@@ -363,7 +362,7 @@ class ActionsController(rest.RestController):

        return Action.convert_with_links(action)

-    @wsme_pecan.wsexpose(Action, body=Action, status_code=HTTPStatus.CREATED)
+    @wsme_pecan.wsexpose(Action, body=Action, status_code=201)
    def post(self, action):
        """Create a new action(forbidden).

@@ -423,7 +422,7 @@ class ActionsController(rest.RestController):
        action_to_update.save()
        return Action.convert_with_links(action_to_update)

-    @wsme_pecan.wsexpose(None, types.uuid, status_code=HTTPStatus.NO_CONTENT)
+    @wsme_pecan.wsexpose(None, types.uuid, status_code=204)
    def delete(self, action_uuid):
        """Delete a action(forbidden).

--- a/watcher/api/controllers/v1/action_plan.py
+++ b/watcher/api/controllers/v1/action_plan.py
@@ -56,7 +56,6 @@ state machine <action_plan_state_machine>`.

 import datetime

-from http import HTTPStatus
 from oslo_log import log
 import pecan
 from pecan import rest
@@ -461,7 +460,7 @@ class ActionPlansController(rest.RestController):

        return ActionPlan.convert_with_links(action_plan)

-    @wsme_pecan.wsexpose(None, types.uuid, status_code=HTTPStatus.NO_CONTENT)
+    @wsme_pecan.wsexpose(None, types.uuid, status_code=204)
    def delete(self, action_plan_uuid):
        """Delete an action plan.

--- a/watcher/api/controllers/v1/audit.py
+++ b/watcher/api/controllers/v1/audit.py
@@ -32,7 +32,6 @@ states, visit :ref:`the Audit State machine <audit_state_machine>`.
 import datetime
 from dateutil import tz

-from http import HTTPStatus
 import pecan
 from pecan import rest
 import wsme
@@ -596,8 +595,7 @@ class AuditsController(rest.RestController):

        return Audit.convert_with_links(rpc_audit)

-    @wsme_pecan.wsexpose(Audit, body=AuditPostType,
-                         status_code=HTTPStatus.CREATED)
+    @wsme_pecan.wsexpose(Audit, body=AuditPostType, status_code=201)
    def post(self, audit_p):
        """Create a new audit.

@@ -719,7 +717,7 @@ class AuditsController(rest.RestController):
        audit_to_update.save()
        return Audit.convert_with_links(audit_to_update)

-    @wsme_pecan.wsexpose(None, wtypes.text, status_code=HTTPStatus.NO_CONTENT)
+    @wsme_pecan.wsexpose(None, wtypes.text, status_code=204)
    def delete(self, audit):
        """Delete an audit.

--- a/watcher/api/controllers/v1/audit_template.py
+++ b/watcher/api/controllers/v1/audit_template.py
@@ -45,7 +45,6 @@ will be launched automatically or will need a manual confirmation from the

 import datetime

-from http import HTTPStatus
 import pecan
 from pecan import rest
 import wsme
@@ -619,7 +618,7 @@ class AuditTemplatesController(rest.RestController):

    @wsme.validate(types.uuid, AuditTemplatePostType)
    @wsme_pecan.wsexpose(AuditTemplate, body=AuditTemplatePostType,
-                         status_code=HTTPStatus.CREATED)
+                         status_code=201)
    def post(self, audit_template_postdata):
        """Create a new audit template.

@@ -695,7 +694,7 @@ class AuditTemplatesController(rest.RestController):
        audit_template_to_update.save()
        return AuditTemplate.convert_with_links(audit_template_to_update)

-    @wsme_pecan.wsexpose(None, wtypes.text, status_code=HTTPStatus.NO_CONTENT)
+    @wsme_pecan.wsexpose(None, wtypes.text, status_code=204)
    def delete(self, audit_template):
        """Delete a audit template.

--- a/watcher/api/controllers/v1/webhooks.py
+++ b/watcher/api/controllers/v1/webhooks.py
@@ -14,7 +14,6 @@
 Webhook endpoint for Watcher v1 REST API.
 """

-from http import HTTPStatus
 from oslo_log import log
 import pecan
 from pecan import rest
@@ -37,7 +36,7 @@ class WebhookController(rest.RestController):
        self.dc_client = rpcapi.DecisionEngineAPI()

    @wsme_pecan.wsexpose(None, wtypes.text, body=types.jsontype,
-                         status_code=HTTPStatus.ACCEPTED)
+                         status_code=202)
    def post(self, audit_ident, body):
        """Trigger the given audit.

--- a/watcher/api/hooks.py
+++ b/watcher/api/hooks.py
@@ -15,7 +15,7 @@
 # under the License.


-from http import HTTPStatus
+from http import client as http_client
 from oslo_config import cfg
 from pecan import hooks

@@ -91,8 +91,8 @@ class NoExceptionTracebackHook(hooks.PecanHook):
        # Do nothing if there is no error.
        # Status codes in the range 200 (OK) to 399 (400 = BAD_REQUEST) are not
        # an error.
-        if (HTTPStatus.OK <= state.response.status_int <
-                HTTPStatus.BAD_REQUEST):
+        if (http_client.OK <= state.response.status_int <
+                http_client.BAD_REQUEST):
            return

        json_body = state.response.json
--- a/watcher/applier/actions/change_node_power_state.py
+++ b/watcher/applier/actions/change_node_power_state.py
@@ -17,17 +17,17 @@
 # limitations under the License.
 #

+import enum
 import time

-from oslo_log import log
-
 from watcher._i18n import _
 from watcher.applier.actions import base
 from watcher.common import exception
-from watcher.common.metal_helper import constants as metal_constants
-from watcher.common.metal_helper import factory as metal_helper_factory

-LOG = log.getLogger(__name__)
+
+class NodeState(enum.Enum):
+    POWERON = 'on'
+    POWEROFF = 'off'


 class ChangeNodePowerState(base.BaseAction):
@@ -43,8 +43,8 @@ class ChangeNodePowerState(base.BaseAction):
         'state': str,
        })

-    The `resource_id` references a baremetal node id (list of available
-    ironic nodes is returned by this command: ``ironic node-list``).
+    The `resource_id` references a ironic node id (list of available
+    ironic node is returned by this command: ``ironic node-list``).
    The `state` value should either be `on` or `off`.
    """

@@ -59,14 +59,10 @@ class ChangeNodePowerState(base.BaseAction):
                    'type': 'string',
                    "minlength": 1
                },
-                'resource_name': {
-                    'type': 'string',
-                    "minlength": 1
-                },
                'state': {
                    'type': 'string',
-                    'enum': [metal_constants.PowerState.ON.value,
-                             metal_constants.PowerState.OFF.value]
+                    'enum': [NodeState.POWERON.value,
+                             NodeState.POWEROFF.value]
                }
            },
            'required': ['resource_id', 'state'],
@@ -86,10 +82,10 @@ class ChangeNodePowerState(base.BaseAction):
        return self._node_manage_power(target_state)

    def revert(self):
-        if self.state == metal_constants.PowerState.ON.value:
-            target_state = metal_constants.PowerState.OFF.value
-        elif self.state == metal_constants.PowerState.OFF.value:
-            target_state = metal_constants.PowerState.ON.value
+        if self.state == NodeState.POWERON.value:
+            target_state = NodeState.POWEROFF.value
+        elif self.state == NodeState.POWEROFF.value:
+            target_state = NodeState.POWERON.value
        return self._node_manage_power(target_state)

    def _node_manage_power(self, state, retry=60):
@@ -97,32 +93,30 @@ class ChangeNodePowerState(base.BaseAction):
            raise exception.IllegalArgumentException(
                message=_("The target state is not defined"))

-        metal_helper = metal_helper_factory.get_helper(self.osc)
-        node = metal_helper.get_node(self.node_uuid)
-        current_state = node.get_power_state()
-
-        if state == current_state.value:
+        ironic_client = self.osc.ironic()
+        nova_client = self.osc.nova()
+        current_state = ironic_client.node.get(self.node_uuid).power_state
+        # power state: 'power on' or 'power off', if current node state
+        # is the same as state, just return True
+        if state in current_state:
            return True

-        if state == metal_constants.PowerState.OFF.value:
-            compute_node = node.get_hypervisor_node().to_dict()
+        if state == NodeState.POWEROFF.value:
+            node_info = ironic_client.node.get(self.node_uuid).to_dict()
+            compute_node_id = node_info['extra']['compute_node_id']
+            compute_node = nova_client.hypervisors.get(compute_node_id)
+            compute_node = compute_node.to_dict()
            if (compute_node['running_vms'] == 0):
-                node.set_power_state(state)
-            else:
-                LOG.warning(
-                    "Compute node %s has %s running vms and will "
-                    "NOT be shut off.",
-                    compute_node["hypervisor_hostname"],
-                    compute_node['running_vms'])
-                return False
+                ironic_client.node.set_power_state(
+                    self.node_uuid, state)
        else:
-            node.set_power_state(state)
+            ironic_client.node.set_power_state(self.node_uuid, state)

-        node = metal_helper.get_node(self.node_uuid)
-        while node.get_power_state() == current_state and retry:
+        ironic_node = ironic_client.node.get(self.node_uuid)
+        while ironic_node.power_state == current_state and retry:
            time.sleep(10)
            retry -= 1
-            node = metal_helper.get_node(self.node_uuid)
+            ironic_node = ironic_client.node.get(self.node_uuid)
        if retry > 0:
            return True
        else:
@@ -136,4 +130,4 @@ class ChangeNodePowerState(base.BaseAction):

    def get_description(self):
        """Description of the action"""
-        return ("Compute node power on/off through Ironic or MaaS.")
+        return ("Compute node power on/off through ironic.")
--- a/watcher/common/cinder_helper.py
+++ b/watcher/common/cinder_helper.py
@@ -17,7 +17,7 @@ import time
 from oslo_log import log

 from cinderclient import exceptions as cinder_exception
-from cinderclient.v3.volumes import Volume
+from cinderclient.v2.volumes import Volume
 from watcher._i18n import _
 from watcher.common import clients
 from watcher.common import exception
--- a/watcher/common/clients.py
+++ b/watcher/common/clients.py
@@ -25,7 +25,6 @@ from novaclient import api_versions as nova_api_versions
 from novaclient import client as nvclient

 from watcher.common import exception
-from watcher.common import utils

 try:
    from ceilometerclient import client as ceclient
@@ -33,12 +32,6 @@ try:
 except ImportError:
    HAS_CEILCLIENT = False

-try:
-    from maas import client as maas_client
-except ImportError:
-    maas_client = None
-
-
 CONF = cfg.CONF

 _CLIENTS_AUTH_GROUP = 'watcher_clients_auth'
@@ -81,7 +74,6 @@ class OpenStackClients(object):
        self._monasca = None
        self._neutron = None
        self._ironic = None
-        self._maas = None
        self._placement = None

    def _get_keystone_session(self):
@@ -273,23 +265,6 @@ class OpenStackClients(object):
                                           session=self.session)
        return self._ironic

-    def maas(self):
-        if self._maas:
-            return self._maas
-
-        if not maas_client:
-            raise exception.UnsupportedError(
-                "MAAS client unavailable. Please install python-libmaas.")
-
-        url = self._get_client_option('maas', 'url')
-        api_key = self._get_client_option('maas', 'api_key')
-        timeout = self._get_client_option('maas', 'timeout')
-        self._maas = utils.async_compat_call(
-            maas_client.connect,
-            url, apikey=api_key,
-            timeout=timeout)
-        return self._maas
-
    @exception.wrap_keystone_exception
    def placement(self):
        if self._placement:
--- a/watcher/common/exception.py
+++ b/watcher/common/exception.py
@@ -25,7 +25,6 @@ SHOULD include dedicated exception logging.
 import functools
 import sys

-from http import HTTPStatus
 from keystoneclient import exceptions as keystone_exceptions
 from oslo_config import cfg
 from oslo_log import log
@@ -63,7 +62,7 @@ class WatcherException(Exception):

    """
    msg_fmt = _("An unknown exception occurred")
-    code = HTTPStatus.INTERNAL_SERVER_ERROR
+    code = 500
    headers = {}
    safe = False

@@ -115,12 +114,12 @@ class UnsupportedError(WatcherException):

 class NotAuthorized(WatcherException):
    msg_fmt = _("Not authorized")
-    code = HTTPStatus.FORBIDDEN
+    code = 403


 class NotAcceptable(WatcherException):
    msg_fmt = _("Request not acceptable.")
-    code = HTTPStatus.NOT_ACCEPTABLE
+    code = 406


 class PolicyNotAuthorized(NotAuthorized):
@@ -133,7 +132,7 @@ class OperationNotPermitted(NotAuthorized):

 class Invalid(WatcherException, ValueError):
    msg_fmt = _("Unacceptable parameters")
-    code = HTTPStatus.BAD_REQUEST
+    code = 400


 class ObjectNotFound(WatcherException):
@@ -142,12 +141,12 @@ class ObjectNotFound(WatcherException):

 class Conflict(WatcherException):
    msg_fmt = _('Conflict')
-    code = HTTPStatus.CONFLICT
+    code = 409


 class ResourceNotFound(ObjectNotFound):
    msg_fmt = _("The %(name)s resource %(id)s could not be found")
-    code = HTTPStatus.NOT_FOUND
+    code = 404


 class InvalidParameter(Invalid):
--- a/watcher/common/metal_helper/init.py
+++ b/watcher/common/metal_helper/init.py
--- a/watcher/common/metal_helper/base.py
+++ b/watcher/common/metal_helper/base.py
@@ -1,81 +0,0 @@
-# Copyright 2023 Cloudbase Solutions
-# All Rights Reserved.
-#
-#    Licensed under the Apache License, Version 2.0 (the "License"); you may
-#    not use this file except in compliance with the License. You may obtain
-#    a copy of the License at
-#
-#         http://www.apache.org/licenses/LICENSE-2.0
-#
-#    Unless required by applicable law or agreed to in writing, software
-#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-#    License for the specific language governing permissions and limitations
-#    under the License.
-
-import abc
-
-from watcher.common import exception
-from watcher.common.metal_helper import constants as metal_constants
-
-
-class BaseMetalNode(abc.ABC):
-    hv_up_when_powered_off = False
-
-    def __init__(self, nova_node=None):
-        self._nova_node = nova_node
-
-    def get_hypervisor_node(self):
-        if not self._nova_node:
-            raise exception.Invalid(message="No associated hypervisor.")
-        return self._nova_node
-
-    def get_hypervisor_hostname(self):
-        return self.get_hypervisor_node().hypervisor_hostname
-
-    @abc.abstractmethod
-    def get_power_state(self):
-        # TODO(lpetrut): document the following methods
-        pass
-
-    @abc.abstractmethod
-    def get_id(self):
-        """Return the node id provided by the bare metal service."""
-        pass
-
-    @abc.abstractmethod
-    def power_on(self):
-        pass
-
-    @abc.abstractmethod
-    def power_off(self):
-        pass
-
-    def set_power_state(self, state):
-        state = metal_constants.PowerState(state)
-        if state == metal_constants.PowerState.ON:
-            self.power_on()
-        elif state == metal_constants.PowerState.OFF:
-            self.power_off()
-        else:
-            raise exception.UnsupportedActionType(
-                "Cannot set power state: %s" % state)
-
-
-class BaseMetalHelper(abc.ABC):
-    def __init__(self, osc):
-        self._osc = osc
-
-    @property
-    def nova_client(self):
-        if not getattr(self, "_nova_client", None):
-            self._nova_client = self._osc.nova()
-        return self._nova_client
-
-    @abc.abstractmethod
-    def list_compute_nodes(self):
-        pass
-
-    @abc.abstractmethod
-    def get_node(self, node_id):
-        pass
--- a/watcher/common/metal_helper/constants.py
+++ b/watcher/common/metal_helper/constants.py
@@ -1,23 +0,0 @@
-# Copyright 2023 Cloudbase Solutions
-# All Rights Reserved.
-#
-#    Licensed under the Apache License, Version 2.0 (the "License"); you may
-#    not use this file except in compliance with the License. You may obtain
-#    a copy of the License at
-#
-#         http://www.apache.org/licenses/LICENSE-2.0
-#
-#    Unless required by applicable law or agreed to in writing, software
-#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-#    License for the specific language governing permissions and limitations
-#    under the License.
-
-import enum
-
-
-class PowerState(str, enum.Enum):
-    ON = "on"
-    OFF = "off"
-    UNKNOWN = "unknown"
-    ERROR = "error"
--- a/watcher/common/metal_helper/factory.py
+++ b/watcher/common/metal_helper/factory.py
@@ -1,33 +0,0 @@
-# Copyright 2023 Cloudbase Solutions
-# All Rights Reserved.
-#
-#    Licensed under the Apache License, Version 2.0 (the "License"); you may
-#    not use this file except in compliance with the License. You may obtain
-#    a copy of the License at
-#
-#         http://www.apache.org/licenses/LICENSE-2.0
-#
-#    Unless required by applicable law or agreed to in writing, software
-#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-#    License for the specific language governing permissions and limitations
-#    under the License.
-
-from oslo_config import cfg
-
-from watcher.common import clients
-from watcher.common.metal_helper import ironic
-from watcher.common.metal_helper import maas
-
-CONF = cfg.CONF
-
-
-def get_helper(osc=None):
-    # TODO(lpetrut): consider caching this client.
-    if not osc:
-        osc = clients.OpenStackClients()
-
-    if CONF.maas_client.url:
-        return maas.MaasHelper(osc)
-    else:
-        return ironic.IronicHelper(osc)
--- a/watcher/common/metal_helper/ironic.py
+++ b/watcher/common/metal_helper/ironic.py
@@ -1,94 +0,0 @@
-# Copyright 2023 Cloudbase Solutions
-# All Rights Reserved.
-#
-#    Licensed under the Apache License, Version 2.0 (the "License"); you may
-#    not use this file except in compliance with the License. You may obtain
-#    a copy of the License at
-#
-#         http://www.apache.org/licenses/LICENSE-2.0
-#
-#    Unless required by applicable law or agreed to in writing, software
-#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-#    License for the specific language governing permissions and limitations
-#    under the License.
-
-from oslo_log import log
-
-from watcher.common.metal_helper import base
-from watcher.common.metal_helper import constants as metal_constants
-
-LOG = log.getLogger(__name__)
-
-POWER_STATES_MAP = {
-    'power on': metal_constants.PowerState.ON,
-    'power off': metal_constants.PowerState.OFF,
-    # For now, we only use ON/OFF states
-    'rebooting': metal_constants.PowerState.ON,
-    'soft power off': metal_constants.PowerState.OFF,
-    'soft reboot': metal_constants.PowerState.ON,
-}
-
-
-class IronicNode(base.BaseMetalNode):
-    hv_up_when_powered_off = True
-
-    def __init__(self, ironic_node, nova_node, ironic_client):
-        super().__init__(nova_node)
-
-        self._ironic_client = ironic_client
-        self._ironic_node = ironic_node
-
-    def get_power_state(self):
-        return POWER_STATES_MAP.get(self._ironic_node.power_state,
-                                    metal_constants.PowerState.UNKNOWN)
-
-    def get_id(self):
-        return self._ironic_node.uuid
-
-    def power_on(self):
-        self._ironic_client.node.set_power_state(self.get_id(), "on")
-
-    def power_off(self):
-        self._ironic_client.node.set_power_state(self.get_id(), "off")
-
-
-class IronicHelper(base.BaseMetalHelper):
-    @property
-    def _client(self):
-        if not getattr(self, "_cached_client", None):
-            self._cached_client = self._osc.ironic()
-        return self._cached_client
-
-    def list_compute_nodes(self):
-        out_list = []
-        # TODO(lpetrut): consider using "detailed=True" instead of making
-        # an additional GET request per node
-        node_list = self._client.node.list()
-
-        for node in node_list:
-            node_info = self._client.node.get(node.uuid)
-            hypervisor_id = node_info.extra.get('compute_node_id', None)
-            if hypervisor_id is None:
-                LOG.warning('Cannot find compute_node_id in extra '
-                            'of ironic node %s', node.uuid)
-                continue
-
-            hypervisor_node = self.nova_client.hypervisors.get(hypervisor_id)
-            if hypervisor_node is None:
-                LOG.warning('Cannot find hypervisor %s', hypervisor_id)
-                continue
-
-            out_node = IronicNode(node, hypervisor_node, self._client)
-            out_list.append(out_node)
-
-        return out_list
-
-    def get_node(self, node_id):
-        ironic_node = self._client.node.get(node_id)
-        compute_node_id = ironic_node.extra.get('compute_node_id')
-        if compute_node_id:
-            compute_node = self.nova_client.hypervisors.get(compute_node_id)
-        else:
-            compute_node = None
-        return IronicNode(ironic_node, compute_node, self._client)
--- a/watcher/common/metal_helper/maas.py
+++ b/watcher/common/metal_helper/maas.py
@@ -1,125 +0,0 @@
-# Copyright 2023 Cloudbase Solutions
-# All Rights Reserved.
-#
-#    Licensed under the Apache License, Version 2.0 (the "License"); you may
-#    not use this file except in compliance with the License. You may obtain
-#    a copy of the License at
-#
-#         http://www.apache.org/licenses/LICENSE-2.0
-#
-#    Unless required by applicable law or agreed to in writing, software
-#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-#    License for the specific language governing permissions and limitations
-#    under the License.
-
-from oslo_config import cfg
-from oslo_log import log
-
-from watcher.common import exception
-from watcher.common.metal_helper import base
-from watcher.common.metal_helper import constants as metal_constants
-from watcher.common import utils
-
-CONF = cfg.CONF
-LOG = log.getLogger(__name__)
-
-try:
-    from maas.client import enum as maas_enum
-except ImportError:
-    maas_enum = None
-
-
-class MaasNode(base.BaseMetalNode):
-    hv_up_when_powered_off = False
-
-    def __init__(self, maas_node, nova_node, maas_client):
-        super().__init__(nova_node)
-
-        self._maas_client = maas_client
-        self._maas_node = maas_node
-
-    def get_power_state(self):
-        maas_state = utils.async_compat_call(
-            self._maas_node.query_power_state,
-            timeout=CONF.maas_client.timeout)
-
-        # python-libmaas may not be available, so we'll avoid a global
-        # variable.
-        power_states_map = {
-            maas_enum.PowerState.ON: metal_constants.PowerState.ON,
-            maas_enum.PowerState.OFF: metal_constants.PowerState.OFF,
-            maas_enum.PowerState.ERROR: metal_constants.PowerState.ERROR,
-            maas_enum.PowerState.UNKNOWN: metal_constants.PowerState.UNKNOWN,
-        }
-        return power_states_map.get(maas_state,
-                                    metal_constants.PowerState.UNKNOWN)
-
-    def get_id(self):
-        return self._maas_node.system_id
-
-    def power_on(self):
-        LOG.info("Powering on MAAS node: %s %s",
-                 self._maas_node.fqdn,
-                 self._maas_node.system_id)
-        utils.async_compat_call(
-            self._maas_node.power_on,
-            timeout=CONF.maas_client.timeout)
-
-    def power_off(self):
-        LOG.info("Powering off MAAS node: %s %s",
-                 self._maas_node.fqdn,
-                 self._maas_node.system_id)
-        utils.async_compat_call(
-            self._maas_node.power_off,
-            timeout=CONF.maas_client.timeout)
-
-
-class MaasHelper(base.BaseMetalHelper):
-    def __init__(self, *args, **kwargs):
-        super().__init__(*args, **kwargs)
-        if not maas_enum:
-            raise exception.UnsupportedError(
-                "MAAS client unavailable. Please install python-libmaas.")
-
-    @property
-    def _client(self):
-        if not getattr(self, "_cached_client", None):
-            self._cached_client = self._osc.maas()
-        return self._cached_client
-
-    def list_compute_nodes(self):
-        out_list = []
-        node_list = utils.async_compat_call(
-            self._client.machines.list,
-            timeout=CONF.maas_client.timeout)
-
-        compute_nodes = self.nova_client.hypervisors.list()
-        compute_node_map = dict()
-        for compute_node in compute_nodes:
-            compute_node_map[compute_node.hypervisor_hostname] = compute_node
-
-        for node in node_list:
-            hypervisor_node = compute_node_map.get(node.fqdn)
-            if not hypervisor_node:
-                LOG.info('Cannot find hypervisor %s', node.fqdn)
-                continue
-
-            out_node = MaasNode(node, hypervisor_node, self._client)
-            out_list.append(out_node)
-
-        return out_list
-
-    def _get_compute_node_by_hostname(self, hostname):
-        compute_nodes = self.nova_client.hypervisors.search(
-            hostname, detailed=True)
-        for compute_node in compute_nodes:
-            if compute_node.hypervisor_hostname == hostname:
-                return compute_node
-
-    def get_node(self, node_id):
-        maas_node = utils.async_compat_call(
-            self._client.machines.get, node_id,
-            timeout=CONF.maas_client.timeout)
-        compute_node = self._get_compute_node_by_hostname(maas_node.fqdn)
-        return MaasNode(maas_node, compute_node, self._client)
--- a/watcher/common/placement_helper.py
+++ b/watcher/common/placement_helper.py
@@ -11,7 +11,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.

-from http import HTTPStatus
 from oslo_config import cfg
 from oslo_log import log as logging

@@ -54,7 +53,7 @@ class PlacementHelper(object):
        if rp_name:
            url += '?name=%s' % rp_name
        resp = self.get(url)
-        if resp.status_code == HTTPStatus.OK:
+        if resp.status_code == 200:
            json_resp = resp.json()
            return json_resp['resource_providers']

@@ -78,7 +77,7 @@ class PlacementHelper(object):
        """
        url = '/resource_providers/%s/inventories' % rp_uuid
        resp = self.get(url)
-        if resp.status_code == HTTPStatus.OK:
+        if resp.status_code == 200:
            json = resp.json()
            return json['inventories']
        msg = ("Failed to get resource provider %(rp_uuid)s inventories. "
@@ -98,7 +97,7 @@ class PlacementHelper(object):
        """
        resp = self.get("/resource_providers/%s/traits" % rp_uuid)

-        if resp.status_code == HTTPStatus.OK:
+        if resp.status_code == 200:
            json = resp.json()
            return json['traits']
        msg = ("Failed to get resource provider %(rp_uuid)s traits. "
@@ -119,7 +118,7 @@ class PlacementHelper(object):
        """
        url = '/allocations/%s' % consumer_uuid
        resp = self.get(url)
-        if resp.status_code == HTTPStatus.OK:
+        if resp.status_code == 200:
            json = resp.json()
            return json['allocations']
        msg = ("Failed to get allocations for consumer %(c_uuid). "
@@ -140,7 +139,7 @@ class PlacementHelper(object):
        """
        url = '/resource_providers/%s/usages' % rp_uuid
        resp = self.get(url)
-        if resp.status_code == HTTPStatus.OK:
+        if resp.status_code == 200:
            json = resp.json()
            return json['usages']
        msg = ("Failed to get resource provider %(rp_uuid)s usages. "
@@ -165,7 +164,7 @@ class PlacementHelper(object):
        """
        url = "/allocation_candidates?%s" % resources
        resp = self.get(url)
-        if resp.status_code == HTTPStatus.OK:
+        if resp.status_code == 200:
            data = resp.json()
            return data['provider_summaries']

--- a/watcher/common/rpc.py
+++ b/watcher/common/rpc.py
@@ -121,7 +121,7 @@ class RequestContextSerializer(messaging.Serializer):
 def get_client(target, version_cap=None, serializer=None):
    assert TRANSPORT is not None
    serializer = RequestContextSerializer(serializer)
-    return messaging.get_rpc_client(
+    return messaging.RPCClient(
        TRANSPORT,
        target,
        version_cap=version_cap,
--- a/watcher/common/utils.py
+++ b/watcher/common/utils.py
@@ -16,16 +16,12 @@

 """Utilities and helper functions."""

-import asyncio
 import datetime
-import inspect
 import random
 import re
 import string

 from croniter import croniter
-import eventlet
-from eventlet import tpool

 from jsonschema import validators
 from oslo_config import cfg
@@ -166,37 +162,3 @@ Draft4Validator = validators.Draft4Validator
 def random_string(n):
    return ''.join([random.choice(
        string.ascii_letters + string.digits) for i in range(n)])
-
-
-# Some clients (e.g. MAAS) use asyncio, which isn't compatible with Eventlet.
-# As a workaround, we're delegating such calls to a native thread.
-def async_compat_call(f, *args, **kwargs):
-    timeout = kwargs.pop('timeout', None)
-
-    async def async_wrapper():
-        ret = f(*args, **kwargs)
-        if inspect.isawaitable(ret):
-            return await asyncio.wait_for(ret, timeout)
-        return ret
-
-    def tpool_wrapper():
-        # This will run in a separate native thread. Ideally, there should be
-        # a single thread permanently running an asyncio loop, but for
-        # convenience we'll use eventlet.tpool, which leverages a thread pool.
-        #
-        # That being considered, we're setting up a temporary asyncio loop to
-        # handle this call.
-        loop = asyncio.new_event_loop()
-        try:
-            asyncio.set_event_loop(loop)
-            return loop.run_until_complete(async_wrapper())
-        finally:
-            loop.close()
-
-    # We'll use eventlet timeouts as an extra precaution and asyncio timeouts
-    # to avoid lingering threads. For consistency, we'll convert eventlet
-    # timeout exceptions to asyncio timeout errors.
-    with eventlet.timeout.Timeout(
-            seconds=timeout,
-            exception=asyncio.TimeoutError("Timeout: %ss" % timeout)):
-        return tpool.execute(tpool_wrapper)
--- a/watcher/conf/init.py
+++ b/watcher/conf/init.py
@@ -35,7 +35,6 @@ from watcher.conf import grafana_client
 from watcher.conf import grafana_translators
 from watcher.conf import ironic_client
 from watcher.conf import keystone_client
-from watcher.conf import maas_client
 from watcher.conf import monasca_client
 from watcher.conf import neutron_client
 from watcher.conf import nova_client
@@ -55,7 +54,6 @@ db.register_opts(CONF)
 planner.register_opts(CONF)
 applier.register_opts(CONF)
 decision_engine.register_opts(CONF)
-maas_client.register_opts(CONF)
 monasca_client.register_opts(CONF)
 nova_client.register_opts(CONF)
 glance_client.register_opts(CONF)
--- a/watcher/conf/grafana_client.py
+++ b/watcher/conf/grafana_client.py
@@ -134,13 +134,7 @@ GRAFANA_CLIENT_OPTS = [
                     "InfluxDB this will be the retention period. "
                     "These queries will need to be constructed using tools "
                     "such as Postman. Example: SELECT cpu FROM {4}."
-                     "cpu_percent WHERE host == '{1}' AND time > now()-{2}s"),
-    cfg.IntOpt('http_timeout',
-               min=0,
-               default=60,
-               mutable=True,
-               help='Timeout for Grafana request')
-]
+                     "cpu_percent WHERE host == '{1}' AND time > now()-{2}s")]


 def register_opts(conf):
--- a/watcher/conf/maas_client.py
+++ b/watcher/conf/maas_client.py
@@ -1,38 +0,0 @@
-# Copyright 2023 Cloudbase Solutions
-# All Rights Reserved.
-#
-#    Licensed under the Apache License, Version 2.0 (the "License"); you may
-#    not use this file except in compliance with the License. You may obtain
-#    a copy of the License at
-#
-#         http://www.apache.org/licenses/LICENSE-2.0
-#
-#    Unless required by applicable law or agreed to in writing, software
-#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-#    License for the specific language governing permissions and limitations
-#    under the License.
-
-
-from oslo_config import cfg
-
-maas_client = cfg.OptGroup(name='maas_client',
-                           title='Configuration Options for MaaS')
-
-MAAS_CLIENT_OPTS = [
-    cfg.StrOpt('url',
-               help='MaaS URL, example: http://1.2.3.4:5240/MAAS'),
-    cfg.StrOpt('api_key',
-               help='MaaS API authentication key.'),
-    cfg.IntOpt('timeout',
-               default=60,
-               help='MaaS client operation timeout in seconds.')]
-
-
-def register_opts(conf):
-    conf.register_group(maas_client)
-    conf.register_opts(MAAS_CLIENT_OPTS, group=maas_client)
-
-
-def list_opts():
-    return [(maas_client, MAAS_CLIENT_OPTS)]
--- a/watcher/db/sqlalchemy/alembic/versions/0f6042416884_add_apscheduler_jobs.py
+++ b/watcher/db/sqlalchemy/alembic/versions/0f6042416884_add_apscheduler_jobs.py
@@ -6,7 +6,6 @@ Create Date: 2017-03-24 11:21:29.036532

 """
 from alembic import op
-from sqlalchemy import inspect
 import sqlalchemy as sa

 from watcher.db.sqlalchemy import models
@@ -15,20 +14,11 @@ from watcher.db.sqlalchemy import models
 revision = '0f6042416884'
 down_revision = '001'

-def _table_exists(table_name):
-    bind = op.get_context().bind
-    insp = inspect(bind)
-    names = insp.get_table_names()
-    return any(t == table_name for t in names)
-

 def upgrade():
-    if _table_exists('apscheduler_jobs'):
-        return
-
    op.create_table(
        'apscheduler_jobs',
-        sa.Column('id', sa.Unicode(191),
+        sa.Column('id', sa.Unicode(191, _warn_on_bytestring=False),
                  nullable=False),
        sa.Column('next_run_time', sa.Float(25), index=True),
        sa.Column('job_state', sa.LargeBinary, nullable=False),
--- a/watcher/db/sqlalchemy/api.py
+++ b/watcher/db/sqlalchemy/api.py
@@ -244,36 +244,30 @@ class Connection(api.BaseConnection):
        for relationship in relationships:
            if not relationship.uselist:
                # We have a One-to-X relationship
-                query = query.options(joinedload(
-                    getattr(model, relationship.key)))
+                query = query.options(joinedload(relationship.key))
        return query

    def _create(self, model, values):
-        session = get_session()
-        with session.begin():
-            obj = model()
-            cleaned_values = {k: v for k, v in values.items()
-                              if k not in self._get_relationships(model)}
-            obj.update(cleaned_values)
-            obj.save(session=session)
-            session.commit()
+        obj = model()
+        cleaned_values = {k: v for k, v in values.items()
+                          if k not in self._get_relationships(model)}
+        obj.update(cleaned_values)
+        obj.save()
        return obj

    def _get(self, context, model, fieldname, value, eager):
-        session = get_session()
-        with session.begin():
-            query = model_query(model, session=session)
-            if eager:
-                query = self._set_eager_options(model, query)
+        query = model_query(model)
+        if eager:
+            query = self._set_eager_options(model, query)

-            query = query.filter(getattr(model, fieldname) == value)
-            if not context.show_deleted:
-                query = query.filter(model.deleted_at.is_(None))
+        query = query.filter(getattr(model, fieldname) == value)
+        if not context.show_deleted:
+            query = query.filter(model.deleted_at.is_(None))

-            try:
-                obj = query.one()
-            except exc.NoResultFound:
-                raise exception.ResourceNotFound(name=model.__name__, id=value)
+        try:
+            obj = query.one()
+        except exc.NoResultFound:
+            raise exception.ResourceNotFound(name=model.__name__, id=value)

        return obj

--- a/watcher/db/sqlalchemy/job_store.py
+++ b/watcher/db/sqlalchemy/job_store.py
@@ -22,7 +22,6 @@ from apscheduler.jobstores.base import ConflictingIdError
 from apscheduler.jobstores import sqlalchemy
 from apscheduler.util import datetime_to_utc_timestamp
 from apscheduler.util import maybe_ref
-from apscheduler.util import utc_timestamp_to_datetime

 from watcher.common import context
 from watcher.common import service
@@ -33,7 +32,7 @@ try:
 except ImportError:  # pragma: nocover
    import pickle

-from sqlalchemy import Table, MetaData, select, and_, null
+from sqlalchemy import Table, MetaData, select, and_
 from sqlalchemy.exc import IntegrityError


@@ -59,7 +58,8 @@ class WatcherJobStore(sqlalchemy.SQLAlchemyJobStore):
        super(WatcherJobStore, self).__init__(url, engine, tablename,
                                              metadata, pickle_protocol)
        metadata = maybe_ref(metadata) or MetaData()
-        self.jobs_t = Table(tablename, metadata, autoload_with=engine)
+        self.jobs_t = Table(tablename, metadata, autoload=True,
+                            autoload_with=engine)
        service_ident = service.ServiceHeartbeat.get_service_name()
        self.tag = tag or {'host': service_ident[0], 'name': service_ident[1]}
        self.service_id = objects.Service.list(context=context.make_context(),
@@ -79,8 +79,7 @@ class WatcherJobStore(sqlalchemy.SQLAlchemyJobStore):
            'tag': jsonutils.dumps(self.tag)
        })
        try:
-            with self.engine.begin() as conn:
-                conn.execute(insert)
+            self.engine.execute(insert)
        except IntegrityError:
            raise ConflictingIdError(job.id)

@@ -89,36 +88,20 @@ class WatcherJobStore(sqlalchemy.SQLAlchemyJobStore):
        self._fix_paused_jobs_sorting(jobs)
        return jobs

-    def get_next_run_time(self):
-        selectable = select(self.jobs_t.c.next_run_time).\
-            where(self.jobs_t.c.next_run_time != null()).\
-            order_by(self.jobs_t.c.next_run_time).limit(1)
-        with self.engine.begin() as connection:
-            # NOTE(danms): The apscheduler implementation of this gets a
-            # decimal.Decimal back from scalar() which causes
-            # utc_timestamp_to_datetime() to choke since it is expecting a
-            # python float. Assume this is SQLAlchemy 2.0 stuff, so just
-            # coerce to a float here.
-            next_run_time = connection.execute(selectable).scalar()
-            return utc_timestamp_to_datetime(float(next_run_time)
-                                             if next_run_time is not None
-                                             else None)
-
    def _get_jobs(self, *conditions):
        jobs = []
        conditions += (self.jobs_t.c.service_id == self.service_id,)
        selectable = select(
-            self.jobs_t.c.id, self.jobs_t.c.job_state, self.jobs_t.c.tag
+            [self.jobs_t.c.id, self.jobs_t.c.job_state, self.jobs_t.c.tag]
        ).order_by(self.jobs_t.c.next_run_time).where(and_(*conditions))
        failed_job_ids = set()
-        with self.engine.begin() as conn:
-            for row in conn.execute(selectable):
-                try:
-                    jobs.append(self._reconstitute_job(row.job_state))
-                except Exception:
-                    self._logger.exception(
-                        'Unable to restore job "%s" -- removing it', row.id)
-                    failed_job_ids.add(row.id)
+        for row in self.engine.execute(selectable):
+            try:
+                jobs.append(self._reconstitute_job(row.job_state))
+            except Exception:
+                self._logger.exception(
+                    'Unable to restore job "%s" -- removing it', row.id)
+                failed_job_ids.add(row.id)

        # Remove all the jobs we failed to restore
        if failed_job_ids:
--- a/watcher/decision_engine/datasources/base.py
+++ b/watcher/decision_engine/datasources/base.py
@@ -63,7 +63,7 @@ class DataSourceBase(object):
            raise exception.MetricNotAvailable(metric=meter_name)
        return meter

-    def query_retry(self, f, *args, ignored_exc=None, **kwargs):
+    def query_retry(self, f, *args, **kwargs):
        """Attempts to retrieve metrics from the external service

        Attempts to access data from the external service and handles
@@ -71,23 +71,15 @@ class DataSourceBase(object):
        to the value of query_max_retries
        :param f: The method that performs the actual querying for metrics
        :param args: Array of arguments supplied to the method
-        :param ignored_exc: An exception or tuple of exceptions that shouldn't
-                            be retried, for example "NotFound" exceptions.
        :param kwargs: The amount of arguments supplied to the method
        :return: The value as retrieved from the external service
        """

        num_retries = CONF.watcher_datasources.query_max_retries
        timeout = CONF.watcher_datasources.query_timeout
-        ignored_exc = ignored_exc or tuple()
-
        for i in range(num_retries):
            try:
                return f(*args, **kwargs)
-            except ignored_exc as e:
-                LOG.debug("Got an ignored exception (%s) while calling: %s ",
-                          e, f)
-                return
            except Exception as e:
                LOG.exception(e)
                self.query_retry_reset(e)
--- a/watcher/decision_engine/datasources/gnocchi.py
+++ b/watcher/decision_engine/datasources/gnocchi.py
@@ -19,7 +19,6 @@
 from datetime import datetime
 from datetime import timedelta

-from gnocchiclient import exceptions as gnc_exc
 from oslo_config import cfg
 from oslo_log import log

@@ -39,7 +38,7 @@ class GnocchiHelper(base.DataSourceBase):
                      host_inlet_temp='hardware.ipmi.node.temperature',
                      host_airflow='hardware.ipmi.node.airflow',
                      host_power='hardware.ipmi.node.power',
-                      instance_cpu_usage='cpu',
+                      instance_cpu_usage='cpu_util',
                      instance_ram_usage='memory.resident',
                      instance_ram_allocated='memory',
                      instance_l3_cache_usage='cpu_l3_cache',
@@ -85,9 +84,7 @@ class GnocchiHelper(base.DataSourceBase):
            kwargs = dict(query={"=": {"original_resource_id": resource_id}},
                          limit=1)
            resources = self.query_retry(
-                f=self.gnocchi.resource.search,
-                ignored_exc=gnc_exc.NotFound,
-                **kwargs)
+                f=self.gnocchi.resource.search, **kwargs)

            if not resources:
                LOG.warning("The {0} resource {1} could not be "
@@ -96,25 +93,6 @@ class GnocchiHelper(base.DataSourceBase):

            resource_id = resources[0]['id']

-        if meter_name == "instance_cpu_usage":
-            if resource_type != "instance":
-                LOG.warning("Unsupported resource type for metric "
-                            "'instance_cpu_usage': ", resource_type)
-                return
-
-            # The "cpu_util" gauge (percentage) metric has been removed.
-            # We're going to obtain the same result by using the rate of change
-            # aggregate operation.
-            if aggregate not in ("mean", "rate:mean"):
-                LOG.warning("Unsupported aggregate for instance_cpu_usage "
-                            "metric: %s. "
-                            "Supported aggregates: mean, rate:mean ",
-                            aggregate)
-                return
-
-            # TODO(lpetrut): consider supporting other aggregates.
-            aggregate = "rate:mean"
-
        raw_kwargs = dict(
            metric=meter,
            start=start_time,
@@ -127,9 +105,7 @@ class GnocchiHelper(base.DataSourceBase):
        kwargs = {k: v for k, v in raw_kwargs.items() if k and v}

        statistics = self.query_retry(
-            f=self.gnocchi.metric.get_measures,
-            ignored_exc=gnc_exc.NotFound,
-            **kwargs)
+            f=self.gnocchi.metric.get_measures, **kwargs)

        return_value = None
        if statistics:
@@ -141,17 +117,6 @@ class GnocchiHelper(base.DataSourceBase):
                # Airflow from hardware.ipmi.node.airflow is reported as
                # 1/10 th of actual CFM
                return_value *= 10
-            if meter_name == "instance_cpu_usage":
-                # "rate:mean" can return negative values for migrated vms.
-                return_value = max(0, return_value)
-
-                # We're converting the cumulative cpu time (ns) to cpu usage
-                # percentage.
-                vcpus = resource.vcpus
-                if not vcpus:
-                    LOG.warning("instance vcpu count not set, assuming 1")
-                    vcpus = 1
-                return_value *= 100 / (granularity * 10e+8) / vcpus

        return return_value

@@ -167,9 +132,7 @@ class GnocchiHelper(base.DataSourceBase):
            kwargs = dict(query={"=": {"original_resource_id": resource_id}},
                          limit=1)
            resources = self.query_retry(
-                f=self.gnocchi.resource.search,
-                ignored_exc=gnc_exc.NotFound,
-                **kwargs)
+                f=self.gnocchi.resource.search, **kwargs)

            if not resources:
                LOG.warning("The {0} resource {1} could not be "
@@ -189,9 +152,7 @@ class GnocchiHelper(base.DataSourceBase):
        kwargs = {k: v for k, v in raw_kwargs.items() if k and v}

        statistics = self.query_retry(
-            f=self.gnocchi.metric.get_measures,
-            ignored_exc=gnc_exc.NotFound,
-            **kwargs)
+            f=self.gnocchi.metric.get_measures, **kwargs)

        return_value = None
        if statistics:
--- a/watcher/decision_engine/datasources/grafana.py
+++ b/watcher/decision_engine/datasources/grafana.py
@@ -18,7 +18,6 @@

 from urllib import parse as urlparse

-from http import HTTPStatus
 from oslo_config import cfg
 from oslo_log import log

@@ -138,13 +137,12 @@ class GrafanaHelper(base.DataSourceBase):
            raise exception.DataSourceNotAvailable(self.NAME)

        resp = requests.get(self._base_url + str(project_id) + '/query',
-                            params=params, headers=self._headers,
-                            timeout=CONF.grafana_client.http_timeout)
-        if resp.status_code == HTTPStatus.OK:
+                            params=params, headers=self._headers)
+        if resp.status_code == 200:
            return resp
-        elif resp.status_code == HTTPStatus.BAD_REQUEST:
+        elif resp.status_code == 400:
            LOG.error("Query for metric is invalid")
-        elif resp.status_code == HTTPStatus.UNAUTHORIZED:
+        elif resp.status_code == 401:
            LOG.error("Authorization token is invalid")
        raise exception.DataSourceNotAvailable(self.NAME)

--- a/watcher/decision_engine/model/collector/cinder.py
+++ b/watcher/decision_engine/model/collector/cinder.py
@@ -205,7 +205,7 @@ class CinderModelBuilder(base.BaseModelBuilder):
        """Build a storage node from a Cinder storage node

        :param node: A storage node
-        :type node: :py:class:`~cinderclient.v3.services.Service`
+        :type node: :py:class:`~cinderclient.v2.services.Service`
        """
        # node.host is formatted as host@backendname since ocata,
        # or may be only host as of ocata
@@ -233,7 +233,7 @@ class CinderModelBuilder(base.BaseModelBuilder):
        """Build a storage pool from a Cinder storage pool

        :param pool: A storage pool
-        :type pool: :py:class:`~cinderclient.v3.pools.Pool`
+        :type pool: :py:class:`~cinderclient.v2.pools.Pool`
        :raises: exception.InvalidPoolAttributeValue
        """
        # build up the storage pool.
--- a/watcher/decision_engine/model/collector/ironic.py
+++ b/watcher/decision_engine/model/collector/ironic.py
@@ -81,7 +81,6 @@ class BareMetalModelBuilder(base.BaseModelBuilder):
    def __init__(self, osc):
        self.osc = osc
        self.model = model_root.BaremetalModelRoot()
-        # TODO(lpetrut): add MAAS support
        self.ironic_helper = ironic_helper.IronicHelper(osc=self.osc)

    def add_ironic_node(self, node):
--- a/watcher/decision_engine/model/collector/nova.py
+++ b/watcher/decision_engine/model/collector/nova.py
@@ -48,7 +48,7 @@ class NovaClusterDataModelCollector(base.BaseClusterDataModelCollector):
                    "type": "array",
                    "items": {
                        "anyOf": [
-                            {"$ref": HOST_AGGREGATES + "host_aggr_id"},
+                            {"$ref": HOST_AGGREGATES + "id"},
                            {"$ref": HOST_AGGREGATES + "name"},
                        ]
                    }
@@ -98,8 +98,7 @@ class NovaClusterDataModelCollector(base.BaseClusterDataModelCollector):
                                "type": "array",
                                "items": {
                                    "anyOf": [
-                                        {"$ref":
-                                            HOST_AGGREGATES + "host_aggr_id"},
+                                        {"$ref": HOST_AGGREGATES + "id"},
                                        {"$ref": HOST_AGGREGATES + "name"},
                                    ]
                                }
@@ -130,7 +129,7 @@ class NovaClusterDataModelCollector(base.BaseClusterDataModelCollector):
            "additionalProperties": False
        },
        "host_aggregates": {
-            "host_aggr_id": {
+            "id": {
                "properties": {
                    "id": {
                        "oneOf": [
--- a/watcher/decision_engine/model/model_root.py
+++ b/watcher/decision_engine/model/model_root.py
@@ -157,7 +157,7 @@ class ModelRoot(nx.DiGraph, base.Model):
            if node_list:
                return node_list[0]
            else:
-                raise exception.ComputeNodeNotFound(name=name)
+                raise exception.ComputeResourceNotFound
        except exception.ComputeResourceNotFound:
            raise exception.ComputeNodeNotFound(name=name)

--- a/watcher/decision_engine/strategy/strategies/base.py
+++ b/watcher/decision_engine/strategy/strategies/base.py
@@ -252,6 +252,9 @@ class BaseStrategy(loadable.Loadable, metaclass=abc.ABCMeta):
        if not self.compute_model:
            raise exception.ClusterStateNotDefined()

+        if self.compute_model.stale:
+            raise exception.ClusterStateStale()
+
        LOG.debug(self.compute_model.to_string())

    def execute(self, audit=None):
--- a/watcher/decision_engine/strategy/strategies/saving_energy.py
+++ b/watcher/decision_engine/strategy/strategies/saving_energy.py
@@ -23,8 +23,6 @@ from oslo_log import log

 from watcher._i18n import _
 from watcher.common import exception
-from watcher.common.metal_helper import constants as metal_constants
-from watcher.common.metal_helper import factory as metal_helper_factory
 from watcher.decision_engine.strategy.strategies import base

 LOG = log.getLogger(__name__)
@@ -83,7 +81,7 @@ class SavingEnergy(base.SavingEnergyBaseStrategy):
    def __init__(self, config, osc=None):

        super(SavingEnergy, self).__init__(config, osc)
-        self._metal_helper = None
+        self._ironic_client = None
        self._nova_client = None

        self.with_vms_node_pool = []
@@ -93,10 +91,10 @@ class SavingEnergy(base.SavingEnergyBaseStrategy):
        self.min_free_hosts_num = 1

    @property
-    def metal_helper(self):
-        if not self._metal_helper:
-            self._metal_helper = metal_helper_factory.get_helper(self.osc)
-        return self._metal_helper
+    def ironic_client(self):
+        if not self._ironic_client:
+            self._ironic_client = self.osc.ironic()
+        return self._ironic_client

    @property
    def nova_client(self):
@@ -151,10 +149,10 @@ class SavingEnergy(base.SavingEnergyBaseStrategy):
        :return: None
        """
        params = {'state': state,
-                  'resource_name': node.get_hypervisor_hostname()}
+                  'resource_name': node.hostname}
        self.solution.add_action(
            action_type='change_node_power_state',
-            resource_id=node.get_id(),
+            resource_id=node.uuid,
            input_parameters=params)

    def get_hosts_pool(self):
@@ -164,61 +162,57 @@ class SavingEnergy(base.SavingEnergyBaseStrategy):

        """

-        node_list = self.metal_helper.list_compute_nodes()
+        node_list = self.ironic_client.node.list()
        for node in node_list:
-            hypervisor_node = node.get_hypervisor_node().to_dict()
-
+            node_info = self.ironic_client.node.get(node.uuid)
+            hypervisor_id = node_info.extra.get('compute_node_id', None)
+            if hypervisor_id is None:
+                LOG.warning(('Cannot find compute_node_id in extra '
+                             'of ironic node %s'), node.uuid)
+                continue
+            hypervisor_node = self.nova_client.hypervisors.get(hypervisor_id)
+            if hypervisor_node is None:
+                LOG.warning(('Cannot find hypervisor %s'), hypervisor_id)
+                continue
+            node.hostname = hypervisor_node.hypervisor_hostname
+            hypervisor_node = hypervisor_node.to_dict()
            compute_service = hypervisor_node.get('service', None)
            host_name = compute_service.get('host')
-            LOG.debug("Found hypervisor: %s", hypervisor_node)
            try:
                self.compute_model.get_node_by_name(host_name)
            except exception.ComputeNodeNotFound:
-                LOG.info("The compute model does not contain the host: %s",
-                         host_name)
                continue

-            if (node.hv_up_when_powered_off and
-                    hypervisor_node.get('state') != 'up'):
-                # filter nodes that are not in 'up' state
-                LOG.info("Ignoring node that isn't in 'up' state: %s",
-                         host_name)
+            if not (hypervisor_node.get('state') == 'up'):
+                """filter nodes that are not in 'up' state"""
                continue
            else:
                if (hypervisor_node['running_vms'] == 0):
-                    power_state = node.get_power_state()
-                    if power_state == metal_constants.PowerState.ON:
+                    if (node_info.power_state == 'power on'):
                        self.free_poweron_node_pool.append(node)
-                    elif power_state == metal_constants.PowerState.OFF:
+                    elif (node_info.power_state == 'power off'):
                        self.free_poweroff_node_pool.append(node)
-                    else:
-                        LOG.info("Ignoring node %s, unknown state: %s",
-                                 node, power_state)
                else:
                    self.with_vms_node_pool.append(node)

    def save_energy(self):

-        need_poweron = int(max(
+        need_poweron = max(
            (len(self.with_vms_node_pool) * self.free_used_percent / 100), (
-                self.min_free_hosts_num)))
+                self.min_free_hosts_num))
        len_poweron = len(self.free_poweron_node_pool)
        len_poweroff = len(self.free_poweroff_node_pool)
-        LOG.debug("need_poweron: %s, len_poweron: %s, len_poweroff: %s",
-                  need_poweron, len_poweron, len_poweroff)
        if len_poweron > need_poweron:
            for node in random.sample(self.free_poweron_node_pool,
                                      (len_poweron - need_poweron)):
-                self.add_action_poweronoff_node(node,
-                                                metal_constants.PowerState.OFF)
-                LOG.info("power off %s", node.get_id())
+                self.add_action_poweronoff_node(node, 'off')
+                LOG.debug("power off %s", node.uuid)
        elif len_poweron < need_poweron:
            diff = need_poweron - len_poweron
            for node in random.sample(self.free_poweroff_node_pool,
                                      min(len_poweroff, diff)):
-                self.add_action_poweronoff_node(node,
-                                                metal_constants.PowerState.ON)
-                LOG.info("power on %s", node.get_id())
+                self.add_action_poweronoff_node(node, 'on')
+                LOG.debug("power on %s", node.uuid)

    def pre_execute(self):
        self._pre_execute()
--- a/watcher/decision_engine/strategy/strategies/vm_workload_consolidation.py
+++ b/watcher/decision_engine/strategy/strategies/vm_workload_consolidation.py
@@ -18,13 +18,9 @@
 # limitations under the License.
 #

-import collections
-
 from oslo_log import log
-import oslo_utils

 from watcher._i18n import _
-from watcher.applier.actions import migration
 from watcher.common import exception
 from watcher.decision_engine.model import element
 from watcher.decision_engine.strategy.strategies import base
@@ -70,8 +66,7 @@ class VMWorkloadConsolidation(base.ServerConsolidationBaseStrategy):

    AGGREGATE = 'mean'
    DATASOURCE_METRICS = ['instance_ram_allocated', 'instance_cpu_usage',
-                          'instance_ram_usage', 'instance_root_disk_size',
-                          'host_cpu_usage', 'host_ram_usage']
+                          'instance_ram_usage', 'instance_root_disk_size']

    MIGRATION = "migrate"
    CHANGE_NOVA_SERVICE_STATE = "change_nova_service_state"
@@ -81,11 +76,6 @@ class VMWorkloadConsolidation(base.ServerConsolidationBaseStrategy):
        self.number_of_migrations = 0
        self.number_of_released_nodes = 0
        self.datasource_instance_data_cache = dict()
-        self.datasource_node_data_cache = dict()
-        # Host metric adjustments that take into account planned
-        # migrations.
-        self.host_metric_delta = collections.defaultdict(
-            lambda: collections.defaultdict(int))

    @classmethod
    def get_name(cls):
@@ -206,12 +196,12 @@ class VMWorkloadConsolidation(base.ServerConsolidationBaseStrategy):
        :return: None
        """
        instance_state_str = self.get_instance_state_str(instance)
-        if instance_state_str in (element.InstanceState.ACTIVE.value,
-                                  element.InstanceState.PAUSED.value):
-            migration_type = migration.Migrate.LIVE_MIGRATION
-        elif instance_state_str == element.InstanceState.STOPPED.value:
-            migration_type = migration.Migrate.COLD_MIGRATION
-        else:
+        if instance_state_str not in (element.InstanceState.ACTIVE.value,
+                                      element.InstanceState.PAUSED.value):
+            # Watcher currently only supports live VM migration and block live
+            # VM migration which both requires migrated VM to be active.
+            # When supported, the cold migration may be used as a fallback
+            # migration mechanism to move non active VMs.
            LOG.error(
                'Cannot live migrate: instance_uuid=%(instance_uuid)s, '
                'state=%(instance_state)s.', dict(
@@ -219,6 +209,8 @@ class VMWorkloadConsolidation(base.ServerConsolidationBaseStrategy):
                    instance_state=instance_state_str))
            return

+        migration_type = 'live'
+
        # Here will makes repeated actions to enable the same compute node,
        # when migrating VMs to the destination node which is disabled.
        # Whether should we remove the same actions in the solution???
@@ -236,18 +228,6 @@ class VMWorkloadConsolidation(base.ServerConsolidationBaseStrategy):
                destination_node)
            self.number_of_migrations += 1

-            instance_util = self.get_instance_utilization(instance)
-            self.host_metric_delta[source_node.hostname]['cpu'] -= (
-                instance_util['cpu'])
-            # We'll deduce the vm allocated memory.
-            self.host_metric_delta[source_node.hostname]['ram'] -= (
-                instance.memory)
-
-            self.host_metric_delta[destination_node.hostname]['cpu'] += (
-                instance_util['cpu'])
-            self.host_metric_delta[destination_node.hostname]['ram'] += (
-                instance.memory)
-
    def disable_unused_nodes(self):
        """Generate actions for disabling unused nodes.

@@ -310,21 +290,6 @@ class VMWorkloadConsolidation(base.ServerConsolidationBaseStrategy):
            disk=instance_disk_util)
        return self.datasource_instance_data_cache.get(instance.uuid)

-    def _get_node_total_utilization(self, node):
-        if node.hostname in self.datasource_node_data_cache:
-            return self.datasource_node_data_cache[node.hostname]
-
-        cpu = self.datasource_backend.get_host_cpu_usage(
-            node, self.period, self.AGGREGATE,
-            self.granularity)
-        ram = self.datasource_backend.get_host_ram_usage(
-            node, self.period, self.AGGREGATE,
-            self.granularity)
-
-        self.datasource_node_data_cache[node.hostname] = dict(
-            cpu=cpu, ram=ram)
-        return self.datasource_node_data_cache[node.hostname]
-
    def get_node_utilization(self, node):
        """Collect cpu, ram and disk utilization statistics of a node.

@@ -342,36 +307,8 @@ class VMWorkloadConsolidation(base.ServerConsolidationBaseStrategy):
            node_cpu_util += instance_util['cpu']
            node_ram_util += instance_util['ram']
            node_disk_util += instance_util['disk']
-            LOG.debug("instance utilization: %s %s",
-                      instance, instance_util)

-        total_node_util = self._get_node_total_utilization(node)
-        total_node_cpu_util = total_node_util['cpu'] or 0
-        if total_node_cpu_util:
-            total_node_cpu_util = total_node_cpu_util * node.vcpus / 100
-            # account for planned migrations
-            total_node_cpu_util += self.host_metric_delta[node.hostname]['cpu']
-
-        total_node_ram_util = total_node_util['ram'] or 0
-        if total_node_ram_util:
-            total_node_ram_util /= oslo_utils.units.Ki
-            total_node_ram_util += self.host_metric_delta[node.hostname]['ram']
-
-        LOG.debug(
-            "node utilization: %s. "
-            "total instance cpu: %s, "
-            "total instance ram: %s, "
-            "total instance disk: %s, "
-            "total host cpu: %s, "
-            "total host ram: %s, "
-            "node delta usage: %s.",
-            node,
-            node_cpu_util, node_ram_util, node_disk_util,
-            total_node_cpu_util, total_node_ram_util,
-            self.host_metric_delta[node.hostname])
-
-        return dict(cpu=max(node_cpu_util, total_node_cpu_util),
-                    ram=max(node_ram_util, total_node_ram_util),
+        return dict(cpu=node_cpu_util, ram=node_ram_util,
                    disk=node_disk_util)

    def get_node_capacity(self, node):
@@ -451,15 +388,8 @@ class VMWorkloadConsolidation(base.ServerConsolidationBaseStrategy):
        instance_utilization = self.get_instance_utilization(instance)
        metrics = ['cpu', 'ram', 'disk']
        for m in metrics:
-            fits = (instance_utilization[m] + node_utilization[m] <=
-                    node_capacity[m] * cc[m])
-            LOG.debug(
-                "Instance fits: %s, metric: %s, instance: %s, "
-                "node: %s, instance utilization: %s, "
-                "node utilization: %s, node capacity: %s, cc: %s",
-                fits, m, instance, node, instance_utilization[m],
-                node_utilization[m], node_capacity[m], cc[m])
-            if not fits:
+            if (instance_utilization[m] + node_utilization[m] >
+                    node_capacity[m] * cc[m]):
                return False
        return True

@@ -494,9 +424,6 @@ class VMWorkloadConsolidation(base.ServerConsolidationBaseStrategy):
                for a in actions:
                    self.solution.actions.remove(a)
                    self.number_of_migrations -= 1
-                LOG.info("Optimized migrations: %s. "
-                         "Source: %s, destination: %s", actions,
-                         src_name, dst_name)
                src_node = self.compute_model.get_node_by_name(src_name)
                dst_node = self.compute_model.get_node_by_name(dst_name)
                instance = self.compute_model.get_instance_by_uuid(
@@ -533,8 +460,6 @@ class VMWorkloadConsolidation(base.ServerConsolidationBaseStrategy):
                        key=lambda x: self.get_instance_utilization(
                            x)['cpu']
                ):
-                    LOG.info("Node %s overloaded, attempting to reduce load.",
-                             node)
                    # skip exclude instance when migrating
                    if instance.watcher_exclude:
                        LOG.debug("Instance is excluded by scope, "
@@ -543,19 +468,11 @@ class VMWorkloadConsolidation(base.ServerConsolidationBaseStrategy):
                    for destination_node in reversed(sorted_nodes):
                        if self.instance_fits(
                                instance, destination_node, cc):
-                            LOG.info("Offload: found fitting "
-                                     "destination (%s) for instance: %s. "
-                                     "Planning migration.",
-                                     destination_node, instance.uuid)
                            self.add_migration(instance, node,
                                               destination_node)
                            break
                    if not self.is_overloaded(node, cc):
-                        LOG.info("Node %s no longer overloaded.", node)
                        break
-                    else:
-                        LOG.info("Node still overloaded (%s), "
-                                 "continuing offload phase.", node)

    def consolidation_phase(self, cc):
        """Perform consolidation phase.
@@ -591,10 +508,6 @@ class VMWorkloadConsolidation(base.ServerConsolidationBaseStrategy):
                        break
                    if self.instance_fits(
                            instance, destination_node, cc):
-                        LOG.info("Consolidation: found fitting "
-                                 "destination (%s) for instance: %s. "
-                                 "Planning migration.",
-                                 destination_node, instance.uuid)
                        self.add_migration(instance, node,
                                           destination_node)
                        break
--- a/watcher/decision_engine/strategy/strategies/workload_balance.py
+++ b/watcher/decision_engine/strategy/strategies/workload_balance.py
@@ -295,7 +295,7 @@ class WorkloadBalance(base.WorkloadStabilizationBaseStrategy):
                        self.threshold)
            return self.solution

-        # choose the server with largest cpu usage
+        # choose the server with largest cpu_util
        source_nodes = sorted(source_nodes,
                              reverse=True,
                              key=lambda x: (x[self._meter]))
--- a/watcher/decision_engine/strategy/strategies/zone_migration.py
+++ b/watcher/decision_engine/strategy/strategies/zone_migration.py
@@ -16,7 +16,7 @@ from dateutil.parser import parse

 from oslo_log import log

-from cinderclient.v3.volumes import Volume
+from cinderclient.v2.volumes import Volume
 from novaclient.v2.servers import Server
 from watcher._i18n import _
 from watcher.common import cinder_helper
--- a/watcher/locale/en_GB/LC_MESSAGES/watcher.po
+++ b/watcher/locale/en_GB/LC_MESSAGES/watcher.po
@@ -1,16 +1,15 @@
 # Andi Chandler <andi@gowling.com>, 2017. #zanata
 # Andi Chandler <andi@gowling.com>, 2018. #zanata
 # Andi Chandler <andi@gowling.com>, 2020. #zanata
-# Andi Chandler <andi@gowling.com>, 2022. #zanata
 msgid ""
 msgstr ""
 "Project-Id-Version: watcher VERSION\n"
 "Report-Msgid-Bugs-To: https://bugs.launchpad.net/openstack-i18n/\n"
-"POT-Creation-Date: 2022-08-29 03:03+0000\n"
+"POT-Creation-Date: 2020-10-27 04:14+0000\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
-"PO-Revision-Date: 2022-05-31 08:38+0000\n"
+"PO-Revision-Date: 2020-10-28 11:02+0000\n"
 "Last-Translator: Andi Chandler <andi@gowling.com>\n"
 "Language-Team: English (United Kingdom)\n"
 "Language: en_GB\n"
@@ -508,9 +507,6 @@ msgstr ""
 msgid "Plugins"
 msgstr "Plugins"

-msgid "Policy File JSON to YAML Migration"
-msgstr "Policy File JSON to YAML Migration"
-
 #, python-format
 msgid "Policy doesn't allow %(action)s to be performed."
 msgstr "Policy doesn't allow %(action)s to be performed."
--- a/watcher/tests/api/test_base.py
+++ b/watcher/tests/api/test_base.py
@@ -13,8 +13,6 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.

-from http import HTTPStatus
-
 from watcher.tests.api import base


@@ -27,6 +25,6 @@ class TestBase(base.FunctionalTest):
        response = self.get_json('/bad/path',
                                 expect_errors=True,
                                 headers={"Accept": "application/json"})
-        self.assertEqual(HTTPStatus.NOT_FOUND, response.status_int)
+        self.assertEqual(404, response.status_int)
        self.assertEqual("application/json", response.content_type)
        self.assertTrue(response.json['error_message'])
--- a/watcher/tests/api/v1/test_actions.py
+++ b/watcher/tests/api/v1/test_actions.py
@@ -14,7 +14,6 @@ import datetime
 import itertools
 from unittest import mock

-from http import HTTPStatus
 from oslo_config import cfg
 from oslo_serialization import jsonutils
 from wsme import types as wtypes
@@ -103,7 +102,7 @@ class TestListAction(api_base.FunctionalTest):

        response = self.get_json('/actions/%s' % action['uuid'],
                                 expect_errors=True)
-        self.assertEqual(HTTPStatus.NOT_FOUND, response.status_int)
+        self.assertEqual(404, response.status_int)

    def test_detail(self):
        action = obj_utils.create_test_action(self.context, parents=None)
@@ -126,7 +125,7 @@ class TestListAction(api_base.FunctionalTest):
        action = obj_utils.create_test_action(self.context, parents=None)
        response = self.get_json('/actions/%s/detail' % action['uuid'],
                                 expect_errors=True)
-        self.assertEqual(HTTPStatus.NOT_FOUND, response.status_int)
+        self.assertEqual(404, response.status_int)

    def test_many(self):
        action_list = []
@@ -267,7 +266,7 @@ class TestListAction(api_base.FunctionalTest):
        url = '/actions?action_plan_uuid=%s&audit_uuid=%s' % (
            action_plan.uuid, self.audit.uuid)
        response = self.get_json(url, expect_errors=True)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_int)
+        self.assertEqual(400, response.status_int)

    def test_many_with_sort_key_uuid(self):
        action_plan = obj_utils.create_test_action_plan(
@@ -328,7 +327,7 @@ class TestListAction(api_base.FunctionalTest):
        response = self.get_json(
            '/actions?sort_key=%s' % 'bad_name',
            expect_errors=True)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_int)
+        self.assertEqual(400, response.status_int)

    def test_many_with_soft_deleted_action_plan_uuid(self):
        action_plan1 = obj_utils.create_test_action_plan(
@@ -489,7 +488,7 @@ class TestPatch(api_base.FunctionalTest):
            [{'path': '/state', 'value': new_state, 'op': 'replace'}],
            expect_errors=True)
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.FORBIDDEN, response.status_int)
+        self.assertEqual(403, response.status_int)
        self.assertTrue(response.json['error_message'])


@@ -517,7 +516,7 @@ class TestDelete(api_base.FunctionalTest):
        mock_utcnow.return_value = test_time
        response = self.delete('/actions/%s' % self.action.uuid,
                               expect_errors=True)
-        self.assertEqual(HTTPStatus.FORBIDDEN, response.status_int)
+        self.assertEqual(403, response.status_int)
        self.assertEqual('application/json', response.content_type)
        self.assertTrue(response.json['error_message'])

@@ -537,7 +536,7 @@ class TestActionPolicyEnforcement(api_base.FunctionalTest):
            "default": "rule:admin_api",
            rule: "rule:defaut"})
        response = func(*arg, **kwarg)
-        self.assertEqual(HTTPStatus.FORBIDDEN, response.status_int)
+        self.assertEqual(403, response.status_int)
        self.assertEqual('application/json', response.content_type)
        self.assertTrue(
            "Policy doesn't allow %s to be performed." % rule,
--- a/watcher/tests/api/v1/test_actions_plans.py
+++ b/watcher/tests/api/v1/test_actions_plans.py
@@ -14,7 +14,6 @@ import datetime
 import itertools
 from unittest import mock

-from http import HTTPStatus
 from oslo_config import cfg
 from oslo_serialization import jsonutils

@@ -88,7 +87,7 @@ class TestListActionPlan(api_base.FunctionalTest):

        response = self.get_json('/action_plans/%s' % action_plan['uuid'],
                                 expect_errors=True)
-        self.assertEqual(HTTPStatus.NOT_FOUND, response.status_int)
+        self.assertEqual(404, response.status_int)

    def test_detail(self):
        action_plan = obj_utils.create_test_action_plan(self.context)
@@ -114,7 +113,7 @@ class TestListActionPlan(api_base.FunctionalTest):
        response = self.get_json(
            '/action_plan/%s/detail' % action_plan['uuid'],
            expect_errors=True)
-        self.assertEqual(HTTPStatus.NOT_FOUND, response.status_int)
+        self.assertEqual(404, response.status_int)

    def test_many(self):
        action_plan_list = []
@@ -261,7 +260,7 @@ class TestListActionPlan(api_base.FunctionalTest):
        response = self.get_json(
            '/action_plans?sort_key=%s' % 'bad_name',
            expect_errors=True)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_int)
+        self.assertEqual(400, response.status_int)

    def test_links(self):
        uuid = utils.generate_uuid()
@@ -318,7 +317,7 @@ class TestDelete(api_base.FunctionalTest):
    def test_delete_action_plan_without_action(self):
        response = self.delete('/action_plans/%s' % self.action_plan.uuid,
                               expect_errors=True)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_int)
+        self.assertEqual(400, response.status_int)
        self.assertEqual('application/json', response.content_type)
        self.assertTrue(response.json['error_message'])
        self.action_plan.state = objects.action_plan.State.SUCCEEDED
@@ -326,7 +325,7 @@ class TestDelete(api_base.FunctionalTest):
        self.delete('/action_plans/%s' % self.action_plan.uuid)
        response = self.get_json('/action_plans/%s' % self.action_plan.uuid,
                                 expect_errors=True)
-        self.assertEqual(HTTPStatus.NOT_FOUND, response.status_int)
+        self.assertEqual(404, response.status_int)
        self.assertEqual('application/json', response.content_type)
        self.assertTrue(response.json['error_message'])

@@ -346,20 +345,20 @@ class TestDelete(api_base.FunctionalTest):
            expect_errors=True)

        # The action plan does not exist anymore
-        self.assertEqual(HTTPStatus.NOT_FOUND, ap_response.status_int)
+        self.assertEqual(404, ap_response.status_int)
        self.assertEqual('application/json', ap_response.content_type)
        self.assertTrue(ap_response.json['error_message'])

        # Nor does the action
        self.assertEqual(0, len(acts_response['actions']))
-        self.assertEqual(HTTPStatus.NOT_FOUND, act_response.status_int)
+        self.assertEqual(404, act_response.status_int)
        self.assertEqual('application/json', act_response.content_type)
        self.assertTrue(act_response.json['error_message'])

    def test_delete_action_plan_not_found(self):
        uuid = utils.generate_uuid()
        response = self.delete('/action_plans/%s' % uuid, expect_errors=True)
-        self.assertEqual(HTTPStatus.NOT_FOUND, response.status_int)
+        self.assertEqual(404, response.status_int)
        self.assertEqual('application/json', response.content_type)
        self.assertTrue(response.json['error_message'])

@@ -389,7 +388,7 @@ class TestStart(api_base.FunctionalTest):
        uuid = utils.generate_uuid()
        response = self.post('/v1/action_plans/%s/%s' %
                             (uuid, 'start'), expect_errors=True)
-        self.assertEqual(HTTPStatus.NOT_FOUND, response.status_int)
+        self.assertEqual(404, response.status_int)
        self.assertEqual('application/json', response.content_type)
        self.assertTrue(response.json['error_message'])

@@ -402,11 +401,11 @@ class TestStart(api_base.FunctionalTest):
        response = self.post('/v1/action_plans/%s/%s/'
                             % (self.action_plan.uuid, 'start'),
                             expect_errors=True)
-        self.assertEqual(HTTPStatus.OK, response.status_int)
+        self.assertEqual(200, response.status_int)
        act_response = self.get_json(
            '/actions/%s' % action.uuid,
            expect_errors=True)
-        self.assertEqual(HTTPStatus.OK, act_response.status_int)
+        self.assertEqual(200, act_response.status_int)
        self.assertEqual('PENDING', act_response.json['state'])
        self.assertEqual('application/json', act_response.content_type)

@@ -446,7 +445,7 @@ class TestPatch(api_base.FunctionalTest):
            expect_errors=True)

        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_int)
+        self.assertEqual(400, response.status_int)
        self.assertTrue(response.json['error_message'])

    def test_replace_non_existent_action_plan_denied(self):
@@ -456,7 +455,7 @@ class TestPatch(api_base.FunctionalTest):
              'value': objects.action_plan.State.PENDING,
              'op': 'replace'}],
            expect_errors=True)
-        self.assertEqual(HTTPStatus.NOT_FOUND, response.status_int)
+        self.assertEqual(404, response.status_int)
        self.assertEqual('application/json', response.content_type)
        self.assertTrue(response.json['error_message'])

@@ -466,7 +465,7 @@ class TestPatch(api_base.FunctionalTest):
            [{'path': '/foo', 'value': 'bar', 'op': 'add'}],
            expect_errors=True)
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_int)
+        self.assertEqual(400, response.status_int)
        self.assertTrue(response.json['error_message'])

    def test_remove_denied(self):
@@ -481,7 +480,7 @@ class TestPatch(api_base.FunctionalTest):
            expect_errors=True)

        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_int)
+        self.assertEqual(400, response.status_int)
        self.assertTrue(response.json['error_message'])

    def test_remove_uuid_denied(self):
@@ -489,7 +488,7 @@ class TestPatch(api_base.FunctionalTest):
            '/action_plans/%s' % self.action_plan.uuid,
            [{'path': '/uuid', 'op': 'remove'}],
            expect_errors=True)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_int)
+        self.assertEqual(400, response.status_int)
        self.assertEqual('application/json', response.content_type)
        self.assertTrue(response.json['error_message'])

@@ -498,7 +497,7 @@ class TestPatch(api_base.FunctionalTest):
            '/action_plans/%s' % self.action_plan.uuid,
            [{'path': '/non-existent', 'op': 'remove'}],
            expect_errors=True)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_code)
+        self.assertEqual(400, response.status_code)
        self.assertEqual('application/json', response.content_type)
        self.assertTrue(response.json['error_message'])

@@ -513,7 +512,7 @@ class TestPatch(api_base.FunctionalTest):
            [{'path': '/state', 'value': new_state,
              'op': 'replace'}])
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.OK, response.status_code)
+        self.assertEqual(200, response.status_code)
        applier_mock.assert_called_once_with(mock.ANY,
                                             self.action_plan.uuid)

@@ -580,7 +579,7 @@ class TestPatchStateTransitionDenied(api_base.FunctionalTest):

        self.assertNotEqual(self.new_state, initial_ap['state'])
        self.assertEqual(self.original_state, updated_ap['state'])
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_code)
+        self.assertEqual(400, response.status_code)
        self.assertEqual('application/json', response.content_type)
        self.assertTrue(response.json['error_message'])

@@ -619,7 +618,7 @@ class TestPatchStateTransitionOk(api_base.FunctionalTest):
        self.assertNotEqual(self.new_state, initial_ap['state'])
        self.assertEqual(self.new_state, updated_ap['state'])
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.OK, response.status_code)
+        self.assertEqual(200, response.status_code)


 class TestActionPlanPolicyEnforcement(api_base.FunctionalTest):
@@ -636,7 +635,7 @@ class TestActionPlanPolicyEnforcement(api_base.FunctionalTest):
            "default": "rule:admin_api",
            rule: "rule:defaut"})
        response = func(*arg, **kwarg)
-        self.assertEqual(HTTPStatus.FORBIDDEN, response.status_int)
+        self.assertEqual(403, response.status_int)
        self.assertEqual('application/json', response.content_type)
        self.assertTrue(
            "Policy doesn't allow %s to be performed." % rule,
--- a/watcher/tests/api/v1/test_audit_templates.py
+++ b/watcher/tests/api/v1/test_audit_templates.py
@@ -15,7 +15,6 @@ import itertools
 from unittest import mock
 from urllib import parse as urlparse

-from http import HTTPStatus
 from oslo_config import cfg
 from oslo_serialization import jsonutils
 from oslo_utils import timeutils
@@ -127,7 +126,7 @@ class TestListAuditTemplate(FunctionalTestWithSetup):
        response = self.get_json(
            '/audit_templates/%s' % audit_template['uuid'],
            expect_errors=True)
-        self.assertEqual(HTTPStatus.NOT_FOUND, response.status_int)
+        self.assertEqual(404, response.status_int)

    def test_detail(self):
        audit_template = obj_utils.create_test_audit_template(self.context)
@@ -153,7 +152,7 @@ class TestListAuditTemplate(FunctionalTestWithSetup):
        response = self.get_json(
            '/audit_templates/%s/detail' % audit_template['uuid'],
            expect_errors=True)
-        self.assertEqual(HTTPStatus.NOT_FOUND, response.status_int)
+        self.assertEqual(404, response.status_int)

    def test_many(self):
        audit_template_list = []
@@ -337,7 +336,7 @@ class TestListAuditTemplate(FunctionalTestWithSetup):
        response = self.get_json(
            '/audit_templates?sort_key=%s' % 'goal_bad_name',
            expect_errors=True)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_int)
+        self.assertEqual(400, response.status_int)


 class TestPatch(FunctionalTestWithSetup):
@@ -363,7 +362,7 @@ class TestPatch(FunctionalTestWithSetup):
            [{'path': '/goal', 'value': new_goal_uuid,
              'op': 'replace'}])
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.OK, response.status_code)
+        self.assertEqual(200, response.status_code)

        response = self.get_json(
            '/audit_templates/%s' % self.audit_template.uuid)
@@ -387,7 +386,7 @@ class TestPatch(FunctionalTestWithSetup):
            [{'path': '/goal', 'value': new_goal_uuid,
              'op': 'replace'}])
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.OK, response.status_code)
+        self.assertEqual(200, response.status_code)

        response = self.get_json(
            '/audit_templates/%s' % self.audit_template.name)
@@ -402,7 +401,7 @@ class TestPatch(FunctionalTestWithSetup):
            [{'path': '/goal', 'value': self.fake_goal1.uuid,
              'op': 'replace'}],
            expect_errors=True)
-        self.assertEqual(HTTPStatus.NOT_FOUND, response.status_int)
+        self.assertEqual(404, response.status_int)
        self.assertEqual('application/json', response.content_type)
        self.assertTrue(response.json['error_message'])

@@ -417,7 +416,7 @@ class TestPatch(FunctionalTestWithSetup):
                [{'path': '/goal', 'value': utils.generate_uuid(),
                  'op': 'replace'}],
                expect_errors=True)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_int)
+        self.assertEqual(400, response.status_int)
        assert not cn_mock.called

    def test_add_goal_uuid(self):
@@ -427,7 +426,7 @@ class TestPatch(FunctionalTestWithSetup):
              'value': self.fake_goal2.uuid,
              'op': 'add'}])
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.OK, response.status_int)
+        self.assertEqual(200, response.status_int)

        response = self.get_json(
            '/audit_templates/%s' % self.audit_template.uuid)
@@ -440,7 +439,7 @@ class TestPatch(FunctionalTestWithSetup):
              'value': self.fake_strategy1.uuid,
              'op': 'add'}])
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.OK, response.status_int)
+        self.assertEqual(200, response.status_int)

        response = self.get_json(
            '/audit_templates/%s' % self.audit_template.uuid)
@@ -453,7 +452,7 @@ class TestPatch(FunctionalTestWithSetup):
              'value': self.fake_strategy2['uuid'],
              'op': 'replace'}])
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.OK, response.status_int)
+        self.assertEqual(200, response.status_int)

        response = self.get_json(
            '/audit_templates/%s' % self.audit_template.uuid)
@@ -467,7 +466,7 @@ class TestPatch(FunctionalTestWithSetup):
              'value': utils.generate_uuid(),  # Does not exist
              'op': 'replace'}], expect_errors=True)
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_int)
+        self.assertEqual(400, response.status_int)
        self.assertTrue(response.json['error_message'])

    def test_add_non_existent_property(self):
@@ -476,7 +475,7 @@ class TestPatch(FunctionalTestWithSetup):
            [{'path': '/foo', 'value': 'bar', 'op': 'add'}],
            expect_errors=True)
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_int)
+        self.assertEqual(400, response.status_int)
        self.assertTrue(response.json['error_message'])

    def test_remove_strategy(self):
@@ -493,7 +492,7 @@ class TestPatch(FunctionalTestWithSetup):
            '/audit_templates/%s' % self.audit_template.uuid,
            [{'path': '/strategy', 'op': 'remove'}])
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.OK, response.status_code)
+        self.assertEqual(200, response.status_code)

    def test_remove_goal(self):
        response = self.get_json(
@@ -504,7 +503,7 @@ class TestPatch(FunctionalTestWithSetup):
            '/audit_templates/%s' % self.audit_template.uuid,
            [{'path': '/goal', 'op': 'remove'}],
            expect_errors=True)
-        self.assertEqual(HTTPStatus.FORBIDDEN, response.status_code)
+        self.assertEqual(403, response.status_code)
        self.assertEqual('application/json', response.content_type)
        self.assertTrue(response.json['error_message'])

@@ -513,7 +512,7 @@ class TestPatch(FunctionalTestWithSetup):
            '/audit_templates/%s' % self.audit_template.uuid,
            [{'path': '/uuid', 'op': 'remove'}],
            expect_errors=True)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_int)
+        self.assertEqual(400, response.status_int)
        self.assertEqual('application/json', response.content_type)
        self.assertTrue(response.json['error_message'])

@@ -522,7 +521,7 @@ class TestPatch(FunctionalTestWithSetup):
            '/audit_templates/%s' % self.audit_template.uuid,
            [{'path': '/non-existent', 'op': 'remove'}],
            expect_errors=True)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_code)
+        self.assertEqual(400, response.status_code)
        self.assertEqual('application/json', response.content_type)
        self.assertTrue(response.json['error_message'])

@@ -539,7 +538,7 @@ class TestPost(FunctionalTestWithSetup):

        response = self.post_json('/audit_templates', audit_template_dict)
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.CREATED, response.status_int)
+        self.assertEqual(201, response.status_int)
        # Check location header
        self.assertIsNotNone(response.location)
        expected_location = \
@@ -566,7 +565,7 @@ class TestPost(FunctionalTestWithSetup):

        response = self.post_json('/audit_templates', audit_template_dict)
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.CREATED, response.status_int)
+        self.assertEqual(201, response.status_int)
        # Check location header
        self.assertIsNotNone(response.location)
        expected_location = \
@@ -614,8 +613,7 @@ class TestPost(FunctionalTestWithSetup):
            strategy=self.fake_strategy1.uuid, scope=scope)
        response = self.post_json('/audit_templates',
                                  audit_template_dict, expect_errors=True)
-        self.assertEqual(HTTPStatus.INTERNAL_SERVER_ERROR,
-                         response.status_int)
+        self.assertEqual(500, response.status_int)

    def test_create_audit_template_does_autogenerate_id(self):
        audit_template_dict = post_get_test_audit_template(
@@ -637,7 +635,7 @@ class TestPost(FunctionalTestWithSetup):

        response = self.post_json('/audit_templates', audit_template_dict)
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.CREATED, response.status_int)
+        self.assertEqual(201, response.status_int)
        self.assertTrue(utils.is_uuid_like(response.json['uuid']))

    def test_create_audit_template_with_invalid_goal(self):
@@ -650,7 +648,7 @@ class TestPost(FunctionalTestWithSetup):
                goal_uuid=utils.generate_uuid())
            response = self.post_json('/audit_templates',
                                      audit_template_dict, expect_errors=True)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_int)
+        self.assertEqual(400, response.status_int)
        assert not cn_mock.called

    def test_create_audit_template_with_invalid_strategy(self):
@@ -664,7 +662,7 @@ class TestPost(FunctionalTestWithSetup):
                strategy_uuid=utils.generate_uuid())
            response = self.post_json('/audit_templates',
                                      audit_template_dict, expect_errors=True)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_int)
+        self.assertEqual(400, response.status_int)
        assert not cn_mock.called

    def test_create_audit_template_with_unrelated_strategy(self):
@@ -678,7 +676,7 @@ class TestPost(FunctionalTestWithSetup):
                strategy=self.fake_strategy2['uuid'])
            response = self.post_json('/audit_templates',
                                      audit_template_dict, expect_errors=True)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_int)
+        self.assertEqual(400, response.status_int)
        assert not cn_mock.called

    def test_create_audit_template_with_uuid(self):
@@ -691,7 +689,7 @@ class TestPost(FunctionalTestWithSetup):
            response = self.post_json('/audit_templates', audit_template_dict,
                                      expect_errors=True)
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_int)
+        self.assertEqual(400, response.status_int)
        assert not cn_mock.called

    def test_create_audit_template_with_old_scope(self):
@@ -712,7 +710,7 @@ class TestPost(FunctionalTestWithSetup):
            strategy=self.fake_strategy1.uuid, scope=scope)
        response = self.post_json('/audit_templates',
                                  audit_template_dict)
-        self.assertEqual(HTTPStatus.CREATED, response.status_int)
+        self.assertEqual(201, response.status_int)


 class TestDelete(api_base.FunctionalTest):
@@ -732,7 +730,7 @@ class TestDelete(api_base.FunctionalTest):
        response = self.get_json(
            urlparse.quote('/audit_templates/%s' % self.audit_template.uuid),
            expect_errors=True)
-        self.assertEqual(HTTPStatus.NOT_FOUND, response.status_int)
+        self.assertEqual(404, response.status_int)
        self.assertEqual('application/json', response.content_type)
        self.assertTrue(response.json['error_message'])

@@ -755,7 +753,7 @@ class TestDelete(api_base.FunctionalTest):
        response = self.get_json(
            urlparse.quote('/audit_templates/%s' % self.audit_template.name),
            expect_errors=True)
-        self.assertEqual(HTTPStatus.NOT_FOUND, response.status_int)
+        self.assertEqual(404, response.status_int)
        self.assertEqual('application/json', response.content_type)
        self.assertTrue(response.json['error_message'])

@@ -773,7 +771,7 @@ class TestDelete(api_base.FunctionalTest):
        uuid = utils.generate_uuid()
        response = self.delete(
            '/audit_templates/%s' % uuid, expect_errors=True)
-        self.assertEqual(HTTPStatus.NOT_FOUND, response.status_int)
+        self.assertEqual(404, response.status_int)
        self.assertEqual('application/json', response.content_type)
        self.assertTrue(response.json['error_message'])

@@ -786,7 +784,7 @@ class TestAuditTemplatePolicyEnforcement(api_base.FunctionalTest):
            "default": "rule:admin_api",
            rule: "rule:defaut"})
        response = func(*arg, **kwarg)
-        self.assertEqual(HTTPStatus.FORBIDDEN, response.status_int)
+        self.assertEqual(403, response.status_int)
        self.assertEqual('application/json', response.content_type)
        self.assertTrue(
            "Policy doesn't allow %s to be performed." % rule,
--- a/watcher/tests/api/v1/test_audits.py
+++ b/watcher/tests/api/v1/test_audits.py
@@ -16,7 +16,6 @@ import itertools
 from unittest import mock
 from urllib import parse as urlparse

-from http import HTTPStatus
 from oslo_config import cfg
 from oslo_serialization import jsonutils
 from oslo_utils import timeutils
@@ -131,7 +130,7 @@ class TestListAudit(api_base.FunctionalTest):

        response = self.get_json('/audits/%s' % audit['uuid'],
                                 expect_errors=True)
-        self.assertEqual(HTTPStatus.NOT_FOUND, response.status_int)
+        self.assertEqual(404, response.status_int)

    def test_detail(self):
        audit = obj_utils.create_test_audit(self.context)
@@ -154,7 +153,7 @@ class TestListAudit(api_base.FunctionalTest):
        audit = obj_utils.create_test_audit(self.context)
        response = self.get_json('/audits/%s/detail' % audit['uuid'],
                                 expect_errors=True)
-        self.assertEqual(HTTPStatus.NOT_FOUND, response.status_int)
+        self.assertEqual(404, response.status_int)

    def test_many(self):
        audit_list = []
@@ -226,7 +225,7 @@ class TestListAudit(api_base.FunctionalTest):
        response = self.get_json(
            '/audits?sort_key=%s' % 'bad_name',
            expect_errors=True)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_int)
+        self.assertEqual(400, response.status_int)

    def test_links(self):
        uuid = utils.generate_uuid()
@@ -296,7 +295,7 @@ class TestPatch(api_base.FunctionalTest):
            [{'path': '/state', 'value': new_state,
             'op': 'replace'}])
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.OK, response.status_code)
+        self.assertEqual(200, response.status_code)

        response = self.get_json('/audits/%s' % self.audit.uuid)
        self.assertEqual(new_state, response['state'])
@@ -309,7 +308,7 @@ class TestPatch(api_base.FunctionalTest):
            '/audits/%s' % utils.generate_uuid(),
            [{'path': '/state', 'value': objects.audit.State.SUCCEEDED,
              'op': 'replace'}], expect_errors=True)
-        self.assertEqual(HTTPStatus.NOT_FOUND, response.status_int)
+        self.assertEqual(404, response.status_int)
        self.assertEqual('application/json', response.content_type)
        self.assertTrue(response.json['error_message'])

@@ -319,7 +318,7 @@ class TestPatch(api_base.FunctionalTest):
            '/audits/%s' % self.audit.uuid,
            [{'path': '/state', 'value': new_state, 'op': 'add'}])
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.OK, response.status_int)
+        self.assertEqual(200, response.status_int)

        response = self.get_json('/audits/%s' % self.audit.uuid)
        self.assertEqual(new_state, response['state'])
@@ -330,7 +329,7 @@ class TestPatch(api_base.FunctionalTest):
            [{'path': '/foo', 'value': 'bar', 'op': 'add'}],
            expect_errors=True)
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_int)
+        self.assertEqual(400, response.status_int)
        self.assertTrue(response.json['error_message'])

    def test_remove_ok(self):
@@ -340,7 +339,7 @@ class TestPatch(api_base.FunctionalTest):
        response = self.patch_json('/audits/%s' % self.audit.uuid,
                                   [{'path': '/interval', 'op': 'remove'}])
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.OK, response.status_code)
+        self.assertEqual(200, response.status_code)

        response = self.get_json('/audits/%s' % self.audit.uuid)
        self.assertIsNone(response['interval'])
@@ -349,7 +348,7 @@ class TestPatch(api_base.FunctionalTest):
        response = self.patch_json('/audits/%s' % self.audit.uuid,
                                   [{'path': '/uuid', 'op': 'remove'}],
                                   expect_errors=True)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_int)
+        self.assertEqual(400, response.status_int)
        self.assertEqual('application/json', response.content_type)
        self.assertTrue(response.json['error_message'])

@@ -358,7 +357,7 @@ class TestPatch(api_base.FunctionalTest):
            '/audits/%s' % self.audit.uuid,
            [{'path': '/non-existent', 'op': 'remove'}],
            expect_errors=True)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_code)
+        self.assertEqual(400, response.status_code)
        self.assertEqual('application/json', response.content_type)
        self.assertTrue(response.json['error_message'])

@@ -416,7 +415,7 @@ class TestPatchStateTransitionDenied(api_base.FunctionalTest):
              'op': 'replace'}],
            expect_errors=True)
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_code)
+        self.assertEqual(400, response.status_code)
        self.assertTrue(response.json['error_message'])

        response = self.get_json('/audits/%s' % self.audit.uuid)
@@ -463,7 +462,7 @@ class TestPatchStateTransitionOk(api_base.FunctionalTest):
            [{'path': '/state', 'value': self.new_state,
             'op': 'replace'}])
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.OK, response.status_code)
+        self.assertEqual(200, response.status_code)

        response = self.get_json('/audits/%s' % self.audit.uuid)
        self.assertEqual(self.new_state, response['state'])
@@ -503,7 +502,7 @@ class TestPost(api_base.FunctionalTest):

        response = self.post_json('/audits', audit_dict)
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.CREATED, response.status_int)
+        self.assertEqual(201, response.status_int)
        # Check location header
        self.assertIsNotNone(response.location)
        expected_location = '/v1/audits/%s' % response.json['uuid']
@@ -528,7 +527,7 @@ class TestPost(api_base.FunctionalTest):
        audit_dict = post_get_test_audit(state=objects.audit.State.SUCCEEDED)

        response = self.post_json('/audits', audit_dict, expect_errors=True)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_int)
+        self.assertEqual(400, response.status_int)
        self.assertEqual('application/json', response.content_type)
        self.assertTrue(response.json['error_message'])

@@ -543,7 +542,7 @@ class TestPost(api_base.FunctionalTest):
                               'next_run_time', 'hostname'])

        response = self.post_json('/audits', audit_dict, expect_errors=True)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_int)
+        self.assertEqual(400, response.status_int)
        self.assertEqual('application/json', response.content_type)
        self.assertTrue(response.json['error_message'])

@@ -558,7 +557,7 @@ class TestPost(api_base.FunctionalTest):

        response = self.post_json('/audits', audit_dict)
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.CREATED, response.status_int)
+        self.assertEqual(201, response.status_int)
        self.assertEqual(objects.audit.State.PENDING,
                         response.json['state'])
        self.assertTrue(utils.is_uuid_like(response.json['uuid']))
@@ -574,7 +573,7 @@ class TestPost(api_base.FunctionalTest):

        response = self.post_json('/audits', audit_dict)
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.CREATED, response.status_int)
+        self.assertEqual(201, response.status_int)
        self.assertEqual(objects.audit.State.PENDING,
                         response.json['state'])
        self.assertTrue(utils.is_uuid_like(response.json['uuid']))
@@ -591,7 +590,7 @@ class TestPost(api_base.FunctionalTest):

        response = self.post_json('/audits', audit_dict)
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.CREATED, response.status_int)
+        self.assertEqual(201, response.status_int)
        self.assertEqual(objects.audit.State.PENDING,
                         response.json['state'])
        self.assertTrue(utils.is_uuid_like(response.json['uuid']))
@@ -609,7 +608,7 @@ class TestPost(api_base.FunctionalTest):
            '01234567-8910-1112-1314-151617181920')

        response = self.post_json('/audits', audit_dict, expect_errors=True)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_int)
+        self.assertEqual(400, response.status_int)
        self.assertEqual("application/json", response.content_type)
        expected_error_msg = ('The audit template UUID or name specified is '
                              'invalid')
@@ -644,7 +643,7 @@ class TestPost(api_base.FunctionalTest):

        response = self.post_json('/audits', audit_dict)
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.CREATED, response.status_int)
+        self.assertEqual(201, response.status_int)
        self.assertEqual(objects.audit.State.PENDING,
                         response.json['state'])
        self.assertTrue(utils.is_uuid_like(response.json['uuid']))
@@ -661,7 +660,7 @@ class TestPost(api_base.FunctionalTest):

        response = self.post_json('/audits', audit_dict)
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.CREATED, response.status_int)
+        self.assertEqual(201, response.status_int)
        self.assertEqual(objects.audit.State.PENDING,
                         response.json['state'])
        self.assertEqual(audit_dict['interval'], response.json['interval'])
@@ -680,7 +679,7 @@ class TestPost(api_base.FunctionalTest):

        response = self.post_json('/audits', audit_dict)
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.CREATED, response.status_int)
+        self.assertEqual(201, response.status_int)
        self.assertEqual(objects.audit.State.PENDING,
                         response.json['state'])
        self.assertEqual(audit_dict['interval'], response.json['interval'])
@@ -699,9 +698,9 @@ class TestPost(api_base.FunctionalTest):

        response = self.post_json('/audits', audit_dict, expect_errors=True)
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.INTERNAL_SERVER_ERROR, response.status_int)
+        self.assertEqual(500, response.status_int)
        expected_error_msg = ('Exactly 5 or 6 columns has to be '
-                              'specified for iterator expression.')
+                              'specified for iteratorexpression.')
        self.assertTrue(response.json['error_message'])
        self.assertIn(expected_error_msg, response.json['error_message'])

@@ -715,7 +714,7 @@ class TestPost(api_base.FunctionalTest):
        audit_dict['audit_type'] = objects.audit.AuditType.CONTINUOUS.value

        response = self.post_json('/audits', audit_dict, expect_errors=True)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_int)
+        self.assertEqual(400, response.status_int)
        self.assertEqual('application/json', response.content_type)
        expected_error_msg = ('Interval of audit must be specified '
                              'for CONTINUOUS.')
@@ -732,7 +731,7 @@ class TestPost(api_base.FunctionalTest):
        audit_dict['audit_type'] = objects.audit.AuditType.ONESHOT.value

        response = self.post_json('/audits', audit_dict, expect_errors=True)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_int)
+        self.assertEqual(400, response.status_int)
        self.assertEqual('application/json', response.content_type)
        expected_error_msg = 'Interval of audit must not be set for ONESHOT.'
        self.assertTrue(response.json['error_message'])
@@ -756,7 +755,7 @@ class TestPost(api_base.FunctionalTest):
        del audit_dict['scope']
        response = self.post_json('/audits', audit_dict, expect_errors=True)
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_int)
+        self.assertEqual(400, response.status_int)
        assert not mock_trigger_audit.called

    @mock.patch.object(deapi.DecisionEngineAPI, 'trigger_audit')
@@ -770,7 +769,7 @@ class TestPost(api_base.FunctionalTest):

        response = self.post_json('/audits', audit_dict, expect_errors=True)
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_int)
+        self.assertEqual(400, response.status_int)
        expected_error_msg = ('Specify parameters but no predefined '
                              'strategy for audit, or no '
                              'parameter spec in predefined strategy')
@@ -793,7 +792,7 @@ class TestPost(api_base.FunctionalTest):

        response = self.post_json('/audits', audit_dict, expect_errors=True)
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_int)
+        self.assertEqual(400, response.status_int)
        expected_error_msg = ('Specify parameters but no predefined '
                              'strategy for audit, or no '
                              'parameter spec in predefined strategy')
@@ -817,7 +816,7 @@ class TestPost(api_base.FunctionalTest):
            del audit_dict[k]

        response = self.post_json('/audits', audit_dict, expect_errors=True)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_int)
+        self.assertEqual(400, response.status_int)
        self.assertEqual("application/json", response.content_type)
        expected_error_msg = 'Audit parameter fake2 are not allowed'
        self.assertTrue(response.json['error_message'])
@@ -876,13 +875,13 @@ class TestPost(api_base.FunctionalTest):
        audit_dict['name'] = normal_name
        response = self.post_json('/audits', audit_dict)
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.CREATED, response.status_int)
+        self.assertEqual(201, response.status_int)
        self.assertEqual(normal_name, response.json['name'])

        audit_dict['name'] = long_name
        response = self.post_json('/audits', audit_dict)
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.CREATED, response.status_int)
+        self.assertEqual(201, response.status_int)
        self.assertNotEqual(long_name, response.json['name'])

    @mock.patch.object(deapi.DecisionEngineAPI, 'trigger_audit')
@@ -906,7 +905,7 @@ class TestPost(api_base.FunctionalTest):
            audit_dict,
            headers={'OpenStack-API-Version': 'infra-optim 1.1'})
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.CREATED, response.status_int)
+        self.assertEqual(201, response.status_int)
        self.assertEqual(objects.audit.State.PENDING,
                         response.json['state'])
        self.assertEqual(audit_dict['interval'], response.json['interval'])
@@ -945,7 +944,7 @@ class TestPost(api_base.FunctionalTest):
            headers={'OpenStack-API-Version': 'infra-optim 1.0'},
            expect_errors=True)
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.NOT_ACCEPTABLE, response.status_int)
+        self.assertEqual(406, response.status_int)
        expected_error_msg = 'Request not acceptable.'
        self.assertTrue(response.json['error_message'])
        self.assertIn(expected_error_msg, response.json['error_message'])
@@ -964,7 +963,7 @@ class TestPost(api_base.FunctionalTest):
            audit_dict,
            headers={'OpenStack-API-Version': 'infra-optim 1.2'})
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.CREATED, response.status_int)
+        self.assertEqual(201, response.status_int)
        self.assertFalse(response.json['force'])

    @mock.patch.object(deapi.DecisionEngineAPI, 'trigger_audit')
@@ -981,7 +980,7 @@ class TestPost(api_base.FunctionalTest):
            audit_dict,
            headers={'OpenStack-API-Version': 'infra-optim 1.2'})
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.CREATED, response.status_int)
+        self.assertEqual(201, response.status_int)
        self.assertTrue(response.json['force'])


@@ -1014,7 +1013,7 @@ class TestDelete(api_base.FunctionalTest):
             'op': 'replace'}])
        response = self.delete('/audits/%s' % self.audit.uuid,
                               expect_errors=True)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_int)
+        self.assertEqual(400, response.status_int)
        self.assertEqual('application/json', response.content_type)
        self.assertTrue(response.json['error_message'])

@@ -1026,7 +1025,7 @@ class TestDelete(api_base.FunctionalTest):
        self.delete('/audits/%s' % self.audit.uuid)
        response = self.get_json('/audits/%s' % self.audit.uuid,
                                 expect_errors=True)
-        self.assertEqual(HTTPStatus.NOT_FOUND, response.status_int)
+        self.assertEqual(404, response.status_int)
        self.assertEqual('application/json', response.content_type)
        self.assertTrue(response.json['error_message'])

@@ -1042,7 +1041,7 @@ class TestDelete(api_base.FunctionalTest):
    def test_delete_audit_not_found(self):
        uuid = utils.generate_uuid()
        response = self.delete('/audits/%s' % uuid, expect_errors=True)
-        self.assertEqual(HTTPStatus.NOT_FOUND, response.status_int)
+        self.assertEqual(404, response.status_int)
        self.assertEqual('application/json', response.content_type)
        self.assertTrue(response.json['error_message'])

@@ -1059,7 +1058,7 @@ class TestAuditPolicyEnforcement(api_base.FunctionalTest):
            "default": "rule:admin_api",
            rule: "rule:defaut"})
        response = func(*arg, **kwarg)
-        self.assertEqual(HTTPStatus.FORBIDDEN, response.status_int)
+        self.assertEqual(403, response.status_int)
        self.assertEqual('application/json', response.content_type)
        self.assertTrue(
            "Policy doesn't allow %s to be performed." % rule,
--- a/watcher/tests/api/v1/test_data_model.py
+++ b/watcher/tests/api/v1/test_data_model.py
@@ -15,7 +15,6 @@

 from unittest import mock

-from http import HTTPStatus
 from oslo_serialization import jsonutils

 from watcher.decision_engine import rpcapi as deapi
@@ -43,7 +42,7 @@ class TestListDataModel(api_base.FunctionalTest):
            '/data_model/?data_model_type=compute',
            headers={'OpenStack-API-Version': 'infra-optim 1.2'},
            expect_errors=True)
-        self.assertEqual(HTTPStatus.NOT_ACCEPTABLE, response.status_int)
+        self.assertEqual(406, response.status_int)


 class TestDataModelPolicyEnforcement(api_base.FunctionalTest):
@@ -60,7 +59,7 @@ class TestDataModelPolicyEnforcement(api_base.FunctionalTest):
            "default": "rule:admin_api",
            rule: "rule:defaut"})
        response = func(*arg, **kwarg)
-        self.assertEqual(HTTPStatus.FORBIDDEN, response.status_int)
+        self.assertEqual(403, response.status_int)
        self.assertEqual('application/json', response.content_type)
        self.assertTrue(
            "Policy doesn't allow %s to be performed." % rule,
--- a/watcher/tests/api/v1/test_goals.py
+++ b/watcher/tests/api/v1/test_goals.py
@@ -10,7 +10,6 @@
 #    See the License for the specific language governing permissions and
 #    limitations under the License.

-from http import HTTPStatus
 from oslo_config import cfg
 from oslo_serialization import jsonutils
 from urllib import parse as urlparse
@@ -60,7 +59,7 @@ class TestListGoal(api_base.FunctionalTest):
        response = self.get_json(
            '/goals/%s' % goal['uuid'],
            expect_errors=True)
-        self.assertEqual(HTTPStatus.NOT_FOUND, response.status_int)
+        self.assertEqual(404, response.status_int)

    def test_detail(self):
        goal = obj_utils.create_test_goal(self.context)
@@ -72,7 +71,7 @@ class TestListGoal(api_base.FunctionalTest):
        goal = obj_utils.create_test_goal(self.context)
        response = self.get_json('/goals/%s/detail' % goal.uuid,
                                 expect_errors=True)
-        self.assertEqual(HTTPStatus.NOT_FOUND, response.status_int)
+        self.assertEqual(404, response.status_int)

    def test_many(self):
        goal_list = []
@@ -140,7 +139,7 @@ class TestListGoal(api_base.FunctionalTest):
        response = self.get_json(
            '/goals?sort_key=%s' % 'bad_name',
            expect_errors=True)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_int)
+        self.assertEqual(400, response.status_int)


 class TestGoalPolicyEnforcement(api_base.FunctionalTest):
@@ -151,7 +150,7 @@ class TestGoalPolicyEnforcement(api_base.FunctionalTest):
            "default": "rule:admin_api",
            rule: "rule:default"})
        response = func(*arg, **kwarg)
-        self.assertEqual(HTTPStatus.FORBIDDEN, response.status_int)
+        self.assertEqual(403, response.status_int)
        self.assertEqual('application/json', response.content_type)
        self.assertTrue(
            "Policy doesn't allow %s to be performed." % rule,
--- a/watcher/tests/api/v1/test_microversions.py
+++ b/watcher/tests/api/v1/test_microversions.py
@@ -10,8 +10,6 @@
 #    See the License for the specific language governing permissions and
 #    limitations under the License.

-from http import HTTPStatus
-
 from watcher.api.controllers.v1 import versions
 from watcher.tests.api import base as api_base

@@ -40,7 +38,7 @@ class TestMicroversions(api_base.FunctionalTest):
                                                        '10'])},
            expect_errors=True, return_json=False)
        self.assertEqual('application/json', response.content_type)
-        self.assertEqual(HTTPStatus.NOT_ACCEPTABLE, response.status_int)
+        self.assertEqual(406, response.status_int)
        expected_error_msg = ('Invalid value for'
                              ' OpenStack-API-Version header')
        self.assertTrue(response.json['error_message'])
@@ -100,7 +98,7 @@ class TestMicroversions(api_base.FunctionalTest):
            headers={'OpenStack-API-Version': ' '.join([SERVICE_TYPE,
                                                        '1.999'])},
            expect_errors=True)
-        self.assertEqual(HTTPStatus.NOT_ACCEPTABLE, response.status_int)
+        self.assertEqual(406, response.status_int)
        self.assertEqual(response.headers[H_MIN_VER], MIN_VER)
        self.assertEqual(response.headers[H_MAX_VER], MAX_VER)
        expected_error_msg = ('Version 1.999 was requested but the minor '
--- a/watcher/tests/api/v1/test_scoring_engines.py
+++ b/watcher/tests/api/v1/test_scoring_engines.py
@@ -10,7 +10,6 @@
 #    See the License for the specific language governing permissions and
 #    limitations under the License.

-from http import HTTPStatus
 from oslo_config import cfg
 from oslo_serialization import jsonutils
 from watcher.common import utils
@@ -45,7 +44,7 @@ class TestListScoringEngine(api_base.FunctionalTest):
        response = self.get_json(
            '/scoring_engines/%s' % scoring_engine['name'],
            expect_errors=True)
-        self.assertEqual(HTTPStatus.NOT_FOUND, response.status_int)
+        self.assertEqual(404, response.status_int)

    def test_detail(self):
        obj_utils.create_test_goal(self.context)
@@ -64,7 +63,7 @@ class TestListScoringEngine(api_base.FunctionalTest):
        response = self.get_json(
            '/scoring_engines/%s/detail' % scoring_engine.id,
            expect_errors=True)
-        self.assertEqual(HTTPStatus.NOT_FOUND, response.status_int)
+        self.assertEqual(404, response.status_int)

    def test_many(self):
        scoring_engine_list = []
@@ -132,7 +131,7 @@ class TestListScoringEngine(api_base.FunctionalTest):
        response = self.get_json(
            '/goals?sort_key=%s' % 'bad_name',
            expect_errors=True)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_int)
+        self.assertEqual(400, response.status_int)


 class TestScoringEnginePolicyEnforcement(api_base.FunctionalTest):
@@ -143,7 +142,7 @@ class TestScoringEnginePolicyEnforcement(api_base.FunctionalTest):
            "default": "rule:admin_api",
            rule: "rule:default"})
        response = func(*arg, **kwarg)
-        self.assertEqual(HTTPStatus.FORBIDDEN, response.status_int)
+        self.assertEqual(403, response.status_int)
        self.assertEqual('application/json', response.content_type)
        self.assertTrue(
            "Policy doesn't allow %s to be performed." % rule,
--- a/watcher/tests/api/v1/test_services.py
+++ b/watcher/tests/api/v1/test_services.py
@@ -10,7 +10,6 @@
 #    See the License for the specific language governing permissions and
 #    limitations under the License.

-from http import HTTPStatus
 from oslo_config import cfg
 from oslo_serialization import jsonutils
 from urllib import parse as urlparse
@@ -58,7 +57,7 @@ class TestListService(api_base.FunctionalTest):
        response = self.get_json(
            '/services/%s' % service['id'],
            expect_errors=True)
-        self.assertEqual(HTTPStatus.NOT_FOUND, response.status_int)
+        self.assertEqual(404, response.status_int)

    def test_detail(self):
        service = obj_utils.create_test_service(self.context)
@@ -75,7 +74,7 @@ class TestListService(api_base.FunctionalTest):
        service = obj_utils.create_test_service(self.context)
        response = self.get_json('/services/%s/detail' % service.id,
                                 expect_errors=True)
-        self.assertEqual(HTTPStatus.NOT_FOUND, response.status_int)
+        self.assertEqual(404, response.status_int)

    def test_many(self):
        service_list = []
@@ -150,7 +149,7 @@ class TestListService(api_base.FunctionalTest):
        response = self.get_json(
            '/services?sort_key=%s' % 'bad_name',
            expect_errors=True)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_int)
+        self.assertEqual(400, response.status_int)


 class TestServicePolicyEnforcement(api_base.FunctionalTest):
@@ -161,7 +160,7 @@ class TestServicePolicyEnforcement(api_base.FunctionalTest):
            "default": "rule:admin_api",
            rule: "rule:default"})
        response = func(*arg, **kwarg)
-        self.assertEqual(HTTPStatus.FORBIDDEN, response.status_int)
+        self.assertEqual(403, response.status_int)
        self.assertEqual('application/json', response.content_type)
        self.assertTrue(
            "Policy doesn't allow %s to be performed." % rule,
--- a/watcher/tests/api/v1/test_strategies.py
+++ b/watcher/tests/api/v1/test_strategies.py
@@ -13,7 +13,6 @@
 from unittest import mock
 from urllib import parse as urlparse

-from http import HTTPStatus
 from oslo_config import cfg
 from oslo_serialization import jsonutils

@@ -89,7 +88,7 @@ class TestListStrategy(api_base.FunctionalTest):
        response = self.get_json(
            '/strategies/%s' % strategy['uuid'],
            expect_errors=True)
-        self.assertEqual(HTTPStatus.NOT_FOUND, response.status_int)
+        self.assertEqual(404, response.status_int)

    def test_detail(self):
        strategy = obj_utils.create_test_strategy(self.context)
@@ -105,7 +104,7 @@ class TestListStrategy(api_base.FunctionalTest):
        strategy = obj_utils.create_test_strategy(self.context)
        response = self.get_json('/strategies/%s/detail' % strategy.uuid,
                                 expect_errors=True)
-        self.assertEqual(HTTPStatus.NOT_FOUND, response.status_int)
+        self.assertEqual(404, response.status_int)

    def test_many(self):
        strategy_list = []
@@ -241,7 +240,7 @@ class TestListStrategy(api_base.FunctionalTest):
        response = self.get_json(
            '/strategies?sort_key=%s' % 'bad_name',
            expect_errors=True)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_int)
+        self.assertEqual(400, response.status_int)


 class TestStrategyPolicyEnforcement(api_base.FunctionalTest):
@@ -257,7 +256,7 @@ class TestStrategyPolicyEnforcement(api_base.FunctionalTest):
            "default": "rule:admin_api",
            rule: "rule:defaut"})
        response = func(*arg, **kwarg)
-        self.assertEqual(HTTPStatus.FORBIDDEN, response.status_int)
+        self.assertEqual(403, response.status_int)
        self.assertEqual('application/json', response.content_type)
        self.assertTrue(
            "Policy doesn't allow %s to be performed." % rule,
--- a/watcher/tests/api/v1/test_types.py
+++ b/watcher/tests/api/v1/test_types.py
@@ -18,8 +18,6 @@ import webtest
 import wsme
 from wsme import types as wtypes

-from http import HTTPStatus
-
 from watcher.api.controllers.v1 import types
 from watcher.common import exception
 from watcher.common import utils
@@ -122,68 +120,68 @@ class TestJsonPatchType(base.TestCase):
                         {'path': '/dict', 'op': 'add',
                          'value': {'cat': 'meow'}}]
        ret = self._patch_json(valid_patches, False)
-        self.assertEqual(HTTPStatus.OK, ret.status_int)
+        self.assertEqual(200, ret.status_int)
        self.assertEqual(valid_patches, ret.json)

    def test_cannot_update_internal_attr(self):
        patch = [{'path': '/internal', 'op': 'replace', 'value': 'foo'}]
        ret = self._patch_json(patch, True)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, ret.status_int)
+        self.assertEqual(400, ret.status_int)
        self.assertTrue(ret.json['faultstring'])

    def test_cannot_update_internal_dict_attr(self):
        patch = [{'path': '/internal', 'op': 'replace',
                 'value': 'foo'}]
        ret = self._patch_json(patch, True)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, ret.status_int)
+        self.assertEqual(400, ret.status_int)
        self.assertTrue(ret.json['faultstring'])

    def test_mandatory_attr(self):
        patch = [{'op': 'replace', 'path': '/mandatory', 'value': 'foo'}]
        ret = self._patch_json(patch, False)
-        self.assertEqual(HTTPStatus.OK, ret.status_int)
+        self.assertEqual(200, ret.status_int)
        self.assertEqual(patch, ret.json)

    def test_cannot_remove_mandatory_attr(self):
        patch = [{'op': 'remove', 'path': '/mandatory'}]
        ret = self._patch_json(patch, True)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, ret.status_int)
+        self.assertEqual(400, ret.status_int)
        self.assertTrue(ret.json['faultstring'])

    def test_missing_required_fields_path(self):
        missing_path = [{'op': 'remove'}]
        ret = self._patch_json(missing_path, True)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, ret.status_int)
+        self.assertEqual(400, ret.status_int)
        self.assertTrue(ret.json['faultstring'])

    def test_missing_required_fields_op(self):
        missing_op = [{'path': '/foo'}]
        ret = self._patch_json(missing_op, True)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, ret.status_int)
+        self.assertEqual(400, ret.status_int)
        self.assertTrue(ret.json['faultstring'])

    def test_invalid_op(self):
        patch = [{'path': '/foo', 'op': 'invalid'}]
        ret = self._patch_json(patch, True)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, ret.status_int)
+        self.assertEqual(400, ret.status_int)
        self.assertTrue(ret.json['faultstring'])

    def test_invalid_path(self):
        patch = [{'path': 'invalid-path', 'op': 'remove'}]
        ret = self._patch_json(patch, True)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, ret.status_int)
+        self.assertEqual(400, ret.status_int)
        self.assertTrue(ret.json['faultstring'])

    def test_cannot_add_with_no_value(self):
        patch = [{'path': '/extra/foo', 'op': 'add'}]
        ret = self._patch_json(patch, True)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, ret.status_int)
+        self.assertEqual(400, ret.status_int)
        self.assertTrue(ret.json['faultstring'])

    def test_cannot_replace_with_no_value(self):
        patch = [{'path': '/foo', 'op': 'replace'}]
        ret = self._patch_json(patch, True)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, ret.status_int)
+        self.assertEqual(400, ret.status_int)
        self.assertTrue(ret.json['faultstring'])


--- a/watcher/tests/api/v1/test_webhooks.py
+++ b/watcher/tests/api/v1/test_webhooks.py
@@ -12,8 +12,6 @@

 from unittest import mock

-from http import HTTPStatus
-
 from watcher.decision_engine import rpcapi as deapi
 from watcher import objects
 from watcher.tests.api import base as api_base
@@ -36,7 +34,7 @@ class TestPost(api_base.FunctionalTest):
        response = self.post_json(
            '/webhooks/%s' % audit['uuid'], {},
            headers={'OpenStack-API-Version': 'infra-optim 1.4'})
-        self.assertEqual(HTTPStatus.ACCEPTED, response.status_int)
+        self.assertEqual(202, response.status_int)
        mock_trigger_audit.assert_called_once_with(
            mock.ANY, audit['uuid'])

@@ -45,7 +43,7 @@ class TestPost(api_base.FunctionalTest):
            '/webhooks/no-audit', {},
            headers={'OpenStack-API-Version': 'infra-optim 1.4'},
            expect_errors=True)
-        self.assertEqual(HTTPStatus.NOT_FOUND, response.status_int)
+        self.assertEqual(404, response.status_int)
        self.assertEqual('application/json', response.content_type)
        self.assertTrue(response.json['error_message'])

@@ -55,7 +53,7 @@ class TestPost(api_base.FunctionalTest):
            '/webhooks/%s' % audit['uuid'], {},
            headers={'OpenStack-API-Version': 'infra-optim 1.4'},
            expect_errors=True)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_int)
+        self.assertEqual(400, response.status_int)
        self.assertEqual('application/json', response.content_type)
        self.assertTrue(response.json['error_message'])

@@ -68,6 +66,6 @@ class TestPost(api_base.FunctionalTest):
            '/webhooks/%s' % audit['uuid'], {},
            headers={'OpenStack-API-Version': 'infra-optim 1.4'},
            expect_errors=True)
-        self.assertEqual(HTTPStatus.BAD_REQUEST, response.status_int)
+        self.assertEqual(400, response.status_int)
        self.assertEqual('application/json', response.content_type)
        self.assertTrue(response.json['error_message'])
--- a/watcher/tests/applier/actions/test_change_node_power_state.py
+++ b/watcher/tests/applier/actions/test_change_node_power_state.py
@@ -19,151 +19,134 @@ import jsonschema

 from watcher.applier.actions import base as baction
 from watcher.applier.actions import change_node_power_state
-from watcher.common.metal_helper import constants as m_constants
-from watcher.common.metal_helper import factory as m_helper_factory
+from watcher.common import clients
 from watcher.tests import base
-from watcher.tests.decision_engine import fake_metal_helper

 COMPUTE_NODE = "compute-1"


+@mock.patch.object(clients.OpenStackClients, 'nova')
+@mock.patch.object(clients.OpenStackClients, 'ironic')
 class TestChangeNodePowerState(base.TestCase):

    def setUp(self):
        super(TestChangeNodePowerState, self).setUp()

-        p_m_factory = mock.patch.object(m_helper_factory, 'get_helper')
-        m_factory = p_m_factory.start()
-        self._metal_helper = m_factory.return_value
-        self.addCleanup(p_m_factory.stop)
-
-        # Let's avoid unnecessary sleep calls while running the test.
-        p_sleep = mock.patch('time.sleep')
-        p_sleep.start()
-        self.addCleanup(p_sleep.stop)
-
        self.input_parameters = {
            baction.BaseAction.RESOURCE_ID: COMPUTE_NODE,
-            "state": m_constants.PowerState.ON.value,
+            "state": change_node_power_state.NodeState.POWERON.value,
        }
        self.action = change_node_power_state.ChangeNodePowerState(
            mock.Mock())
        self.action.input_parameters = self.input_parameters

-    def test_parameters_down(self):
+    def test_parameters_down(self, mock_ironic, mock_nova):
        self.action.input_parameters = {
            baction.BaseAction.RESOURCE_ID: COMPUTE_NODE,
            self.action.STATE:
-                m_constants.PowerState.OFF.value}
+                change_node_power_state.NodeState.POWEROFF.value}
        self.assertTrue(self.action.validate_parameters())

-    def test_parameters_up(self):
+    def test_parameters_up(self, mock_ironic, mock_nova):
        self.action.input_parameters = {
            baction.BaseAction.RESOURCE_ID: COMPUTE_NODE,
            self.action.STATE:
-                m_constants.PowerState.ON.value}
+                change_node_power_state.NodeState.POWERON.value}
        self.assertTrue(self.action.validate_parameters())

-    def test_parameters_exception_wrong_state(self):
+    def test_parameters_exception_wrong_state(self, mock_ironic, mock_nova):
        self.action.input_parameters = {
            baction.BaseAction.RESOURCE_ID: COMPUTE_NODE,
            self.action.STATE: 'error'}
        self.assertRaises(jsonschema.ValidationError,
                          self.action.validate_parameters)

-    def test_parameters_resource_id_empty(self):
+    def test_parameters_resource_id_empty(self, mock_ironic, mock_nova):
        self.action.input_parameters = {
            self.action.STATE:
-                m_constants.PowerState.ON.value,
+                change_node_power_state.NodeState.POWERON.value,
        }
        self.assertRaises(jsonschema.ValidationError,
                          self.action.validate_parameters)

-    def test_parameters_applies_add_extra(self):
+    def test_parameters_applies_add_extra(self, mock_ironic, mock_nova):
        self.action.input_parameters = {"extra": "failed"}
        self.assertRaises(jsonschema.ValidationError,
                          self.action.validate_parameters)

-    def test_change_service_state_pre_condition(self):
+    def test_change_service_state_pre_condition(self, mock_ironic, mock_nova):
        try:
            self.action.pre_condition()
        except Exception as exc:
            self.fail(exc)

-    def test_change_node_state_post_condition(self):
+    def test_change_node_state_post_condition(self, mock_ironic, mock_nova):
        try:
            self.action.post_condition()
        except Exception as exc:
            self.fail(exc)

-    def test_execute_node_service_state_with_poweron_target(self):
+    def test_execute_node_service_state_with_poweron_target(
+            self, mock_ironic, mock_nova):
+        mock_irclient = mock_ironic.return_value
        self.action.input_parameters["state"] = (
-            m_constants.PowerState.ON.value)
-        mock_nodes = [
-            fake_metal_helper.get_mock_metal_node(
-                power_state=m_constants.PowerState.OFF),
-            fake_metal_helper.get_mock_metal_node(
-                power_state=m_constants.PowerState.ON)
-        ]
-        self._metal_helper.get_node.side_effect = mock_nodes
+            change_node_power_state.NodeState.POWERON.value)
+        mock_irclient.node.get.side_effect = [
+            mock.MagicMock(power_state='power off'),
+            mock.MagicMock(power_state='power on')]

        result = self.action.execute()
        self.assertTrue(result)

-        mock_nodes[0].set_power_state.assert_called_once_with(
-            m_constants.PowerState.ON.value)
+        mock_irclient.node.set_power_state.assert_called_once_with(
+            COMPUTE_NODE, change_node_power_state.NodeState.POWERON.value)

-    def test_execute_change_node_state_with_poweroff_target(self):
+    def test_execute_change_node_state_with_poweroff_target(
+            self, mock_ironic, mock_nova):
+        mock_irclient = mock_ironic.return_value
+        mock_nvclient = mock_nova.return_value
+        mock_get = mock.MagicMock()
+        mock_get.to_dict.return_value = {'running_vms': 0}
+        mock_nvclient.hypervisors.get.return_value = mock_get
        self.action.input_parameters["state"] = (
-            m_constants.PowerState.OFF.value)
-
-        mock_nodes = [
-            fake_metal_helper.get_mock_metal_node(
-                power_state=m_constants.PowerState.ON),
-            fake_metal_helper.get_mock_metal_node(
-                power_state=m_constants.PowerState.ON),
-            fake_metal_helper.get_mock_metal_node(
-                power_state=m_constants.PowerState.OFF)
-        ]
-        self._metal_helper.get_node.side_effect = mock_nodes
-
+            change_node_power_state.NodeState.POWEROFF.value)
+        mock_irclient.node.get.side_effect = [
+            mock.MagicMock(power_state='power on'),
+            mock.MagicMock(power_state='power on'),
+            mock.MagicMock(power_state='power off')]
        result = self.action.execute()
        self.assertTrue(result)

-        mock_nodes[0].set_power_state.assert_called_once_with(
-            m_constants.PowerState.OFF.value)
+        mock_irclient.node.set_power_state.assert_called_once_with(
+            COMPUTE_NODE, change_node_power_state.NodeState.POWEROFF.value)

-    def test_revert_change_node_state_with_poweron_target(self):
+    def test_revert_change_node_state_with_poweron_target(
+            self, mock_ironic, mock_nova):
+        mock_irclient = mock_ironic.return_value
+        mock_nvclient = mock_nova.return_value
+        mock_get = mock.MagicMock()
+        mock_get.to_dict.return_value = {'running_vms': 0}
+        mock_nvclient.hypervisors.get.return_value = mock_get
        self.action.input_parameters["state"] = (
-            m_constants.PowerState.ON.value)
-
-        mock_nodes = [
-            fake_metal_helper.get_mock_metal_node(
-                power_state=m_constants.PowerState.ON),
-            fake_metal_helper.get_mock_metal_node(
-                power_state=m_constants.PowerState.ON),
-            fake_metal_helper.get_mock_metal_node(
-                power_state=m_constants.PowerState.OFF)
-        ]
-        self._metal_helper.get_node.side_effect = mock_nodes
-
+            change_node_power_state.NodeState.POWERON.value)
+        mock_irclient.node.get.side_effect = [
+            mock.MagicMock(power_state='power on'),
+            mock.MagicMock(power_state='power on'),
+            mock.MagicMock(power_state='power off')]
        self.action.revert()

-        mock_nodes[0].set_power_state.assert_called_once_with(
-            m_constants.PowerState.OFF.value)
+        mock_irclient.node.set_power_state.assert_called_once_with(
+            COMPUTE_NODE, change_node_power_state.NodeState.POWEROFF.value)

-    def test_revert_change_node_state_with_poweroff_target(self):
+    def test_revert_change_node_state_with_poweroff_target(
+            self, mock_ironic, mock_nova):
+        mock_irclient = mock_ironic.return_value
        self.action.input_parameters["state"] = (
-            m_constants.PowerState.OFF.value)
-        mock_nodes = [
-            fake_metal_helper.get_mock_metal_node(
-                power_state=m_constants.PowerState.OFF),
-            fake_metal_helper.get_mock_metal_node(
-                power_state=m_constants.PowerState.ON)
-        ]
-        self._metal_helper.get_node.side_effect = mock_nodes
-
+            change_node_power_state.NodeState.POWEROFF.value)
+        mock_irclient.node.get.side_effect = [
+            mock.MagicMock(power_state='power off'),
+            mock.MagicMock(power_state='power on')]
        self.action.revert()

-        mock_nodes[0].set_power_state.assert_called_once_with(
-            m_constants.PowerState.ON.value)
+        mock_irclient.node.set_power_state.assert_called_once_with(
+            COMPUTE_NODE, change_node_power_state.NodeState.POWERON.value)
--- a/watcher/tests/common/metal_helper/init.py
+++ b/watcher/tests/common/metal_helper/init.py
--- a/watcher/tests/common/metal_helper/test_base.py
+++ b/watcher/tests/common/metal_helper/test_base.py
@@ -1,96 +0,0 @@
-# Copyright 2023 Cloudbase Solutions
-# All Rights Reserved.
-#
-#    Licensed under the Apache License, Version 2.0 (the "License"); you may
-#    not use this file except in compliance with the License. You may obtain
-#    a copy of the License at
-#
-#         http://www.apache.org/licenses/LICENSE-2.0
-#
-#    Unless required by applicable law or agreed to in writing, software
-#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-#    License for the specific language governing permissions and limitations
-#    under the License.
-
-from unittest import mock
-
-from watcher.common import exception
-from watcher.common.metal_helper import base as m_helper_base
-from watcher.common.metal_helper import constants as m_constants
-from watcher.tests import base
-
-
-# The base classes have abstract methods, we'll need to
-# stub them.
-class MockMetalNode(m_helper_base.BaseMetalNode):
-    def get_power_state(self):
-        raise NotImplementedError()
-
-    def get_id(self):
-        raise NotImplementedError()
-
-    def power_on(self):
-        raise NotImplementedError()
-
-    def power_off(self):
-        raise NotImplementedError()
-
-
-class MockMetalHelper(m_helper_base.BaseMetalHelper):
-    def list_compute_nodes(self):
-        pass
-
-    def get_node(self, node_id):
-        pass
-
-
-class TestBaseMetalNode(base.TestCase):
-    def setUp(self):
-        super().setUp()
-
-        self._nova_node = mock.Mock()
-        self._node = MockMetalNode(self._nova_node)
-
-    def test_get_hypervisor_node(self):
-        self.assertEqual(
-            self._nova_node,
-            self._node.get_hypervisor_node())
-
-    def test_get_hypervisor_node_missing(self):
-        node = MockMetalNode()
-        self.assertRaises(
-            exception.Invalid,
-            node.get_hypervisor_node)
-
-    def test_get_hypervisor_hostname(self):
-        self.assertEqual(
-            self._nova_node.hypervisor_hostname,
-            self._node.get_hypervisor_hostname())
-
-    @mock.patch.object(MockMetalNode, 'power_on')
-    @mock.patch.object(MockMetalNode, 'power_off')
-    def test_set_power_state(self,
-                             mock_power_off, mock_power_on):
-        self._node.set_power_state(m_constants.PowerState.ON)
-        mock_power_on.assert_called_once_with()
-
-        self._node.set_power_state(m_constants.PowerState.OFF)
-        mock_power_off.assert_called_once_with()
-
-        self.assertRaises(
-            exception.UnsupportedActionType,
-            self._node.set_power_state,
-            m_constants.PowerState.UNKNOWN)
-
-
-class TestBaseMetalHelper(base.TestCase):
-    def setUp(self):
-        super().setUp()
-
-        self._osc = mock.Mock()
-        self._helper = MockMetalHelper(self._osc)
-
-    def test_nova_client_attr(self):
-        self.assertEqual(self._osc.nova.return_value,
-                         self._helper.nova_client)
--- a/watcher/tests/common/metal_helper/test_factory.py
+++ b/watcher/tests/common/metal_helper/test_factory.py
@@ -1,38 +0,0 @@
-# Copyright 2023 Cloudbase Solutions
-# All Rights Reserved.
-#
-#    Licensed under the Apache License, Version 2.0 (the "License"); you may
-#    not use this file except in compliance with the License. You may obtain
-#    a copy of the License at
-#
-#         http://www.apache.org/licenses/LICENSE-2.0
-#
-#    Unless required by applicable law or agreed to in writing, software
-#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-#    License for the specific language governing permissions and limitations
-#    under the License.
-
-from unittest import mock
-
-from watcher.common import clients
-from watcher.common.metal_helper import factory
-from watcher.common.metal_helper import ironic
-from watcher.common.metal_helper import maas
-from watcher.tests import base
-
-
-class TestMetalHelperFactory(base.TestCase):
-
-    @mock.patch.object(clients, 'OpenStackClients')
-    @mock.patch.object(maas, 'MaasHelper')
-    @mock.patch.object(ironic, 'IronicHelper')
-    def test_factory(self, mock_ironic, mock_maas, mock_osc):
-        self.assertEqual(
-            mock_ironic.return_value,
-            factory.get_helper())
-
-        self.config(url="fake_maas_url", group="maas_client")
-        self.assertEqual(
-            mock_maas.return_value,
-            factory.get_helper())
--- a/watcher/tests/common/metal_helper/test_ironic.py
+++ b/watcher/tests/common/metal_helper/test_ironic.py
@@ -1,128 +0,0 @@
-# Copyright 2023 Cloudbase Solutions
-# All Rights Reserved.
-#
-#    Licensed under the Apache License, Version 2.0 (the "License"); you may
-#    not use this file except in compliance with the License. You may obtain
-#    a copy of the License at
-#
-#         http://www.apache.org/licenses/LICENSE-2.0
-#
-#    Unless required by applicable law or agreed to in writing, software
-#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-#    License for the specific language governing permissions and limitations
-#    under the License.
-
-from unittest import mock
-
-from watcher.common.metal_helper import constants as m_constants
-from watcher.common.metal_helper import ironic
-from watcher.tests import base
-
-
-class TestIronicNode(base.TestCase):
-    def setUp(self):
-        super().setUp()
-
-        self._wrapped_node = mock.Mock()
-        self._nova_node = mock.Mock()
-        self._ironic_client = mock.Mock()
-
-        self._node = ironic.IronicNode(
-            self._wrapped_node, self._nova_node, self._ironic_client)
-
-    def test_get_power_state(self):
-        states = (
-            "power on",
-            "power off",
-            "rebooting",
-            "soft power off",
-            "soft reboot",
-            'SomeOtherState')
-        type(self._wrapped_node).power_state = mock.PropertyMock(
-            side_effect=states)
-
-        expected_states = (
-            m_constants.PowerState.ON,
-            m_constants.PowerState.OFF,
-            m_constants.PowerState.ON,
-            m_constants.PowerState.OFF,
-            m_constants.PowerState.ON,
-            m_constants.PowerState.UNKNOWN)
-
-        for expected_state in expected_states:
-            actual_state = self._node.get_power_state()
-            self.assertEqual(expected_state, actual_state)
-
-    def test_get_id(self):
-        self.assertEqual(
-            self._wrapped_node.uuid,
-            self._node.get_id())
-
-    def test_power_on(self):
-        self._node.power_on()
-        self._ironic_client.node.set_power_state.assert_called_once_with(
-            self._wrapped_node.uuid, "on")
-
-    def test_power_off(self):
-        self._node.power_off()
-        self._ironic_client.node.set_power_state.assert_called_once_with(
-            self._wrapped_node.uuid, "off")
-
-
-class TestIronicHelper(base.TestCase):
-    def setUp(self):
-        super().setUp()
-
-        self._mock_osc = mock.Mock()
-        self._mock_nova_client = self._mock_osc.nova.return_value
-        self._mock_ironic_client = self._mock_osc.ironic.return_value
-        self._helper = ironic.IronicHelper(osc=self._mock_osc)
-
-    def test_list_compute_nodes(self):
-        mock_machines = [
-            mock.Mock(
-                extra=dict(compute_node_id=mock.sentinel.compute_node_id)),
-            mock.Mock(
-                extra=dict(compute_node_id=mock.sentinel.compute_node_id2)),
-            mock.Mock(
-                extra=dict())
-        ]
-        mock_hypervisor = mock.Mock()
-
-        self._mock_ironic_client.node.list.return_value = mock_machines
-        self._mock_ironic_client.node.get.side_effect = mock_machines
-        self._mock_nova_client.hypervisors.get.side_effect = (
-            mock_hypervisor, None)
-
-        out_nodes = self._helper.list_compute_nodes()
-        self.assertEqual(1, len(out_nodes))
-
-        out_node = out_nodes[0]
-        self.assertIsInstance(out_node, ironic.IronicNode)
-        self.assertEqual(mock_hypervisor, out_node._nova_node)
-        self.assertEqual(mock_machines[0], out_node._ironic_node)
-        self.assertEqual(self._mock_ironic_client, out_node._ironic_client)
-
-    def test_get_node(self):
-        mock_machine = mock.Mock(
-            extra=dict(compute_node_id=mock.sentinel.compute_node_id))
-        self._mock_ironic_client.node.get.return_value = mock_machine
-
-        out_node = self._helper.get_node(mock.sentinel.id)
-
-        self.assertEqual(self._mock_nova_client.hypervisors.get.return_value,
-                         out_node._nova_node)
-        self.assertEqual(self._mock_ironic_client, out_node._ironic_client)
-        self.assertEqual(mock_machine, out_node._ironic_node)
-
-    def test_get_node_not_a_hypervisor(self):
-        mock_machine = mock.Mock(extra=dict(compute_node_id=None))
-        self._mock_ironic_client.node.get.return_value = mock_machine
-
-        out_node = self._helper.get_node(mock.sentinel.id)
-
-        self._mock_nova_client.hypervisors.get.assert_not_called()
-        self.assertIsNone(out_node._nova_node)
-        self.assertEqual(self._mock_ironic_client, out_node._ironic_client)
-        self.assertEqual(mock_machine, out_node._ironic_node)
--- a/watcher/tests/common/metal_helper/test_maas.py
+++ b/watcher/tests/common/metal_helper/test_maas.py
@@ -1,126 +0,0 @@
-# Copyright 2023 Cloudbase Solutions
-# All Rights Reserved.
-#
-#    Licensed under the Apache License, Version 2.0 (the "License"); you may
-#    not use this file except in compliance with the License. You may obtain
-#    a copy of the License at
-#
-#         http://www.apache.org/licenses/LICENSE-2.0
-#
-#    Unless required by applicable law or agreed to in writing, software
-#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-#    License for the specific language governing permissions and limitations
-#    under the License.
-
-from unittest import mock
-
-try:
-    from maas.client import enum as maas_enum
-except ImportError:
-    maas_enum = None
-
-from watcher.common.metal_helper import constants as m_constants
-from watcher.common.metal_helper import maas
-from watcher.tests import base
-
-
-class TestMaasNode(base.TestCase):
-    def setUp(self):
-        super().setUp()
-
-        self._wrapped_node = mock.Mock()
-        self._nova_node = mock.Mock()
-        self._maas_client = mock.Mock()
-
-        self._node = maas.MaasNode(
-            self._wrapped_node, self._nova_node, self._maas_client)
-
-    def test_get_power_state(self):
-        if not maas_enum:
-            self.skipTest("python-libmaas not intalled.")
-
-        self._wrapped_node.query_power_state.side_effect = (
-            maas_enum.PowerState.ON,
-            maas_enum.PowerState.OFF,
-            maas_enum.PowerState.ERROR,
-            maas_enum.PowerState.UNKNOWN,
-            'SomeOtherState')
-
-        expected_states = (
-            m_constants.PowerState.ON,
-            m_constants.PowerState.OFF,
-            m_constants.PowerState.ERROR,
-            m_constants.PowerState.UNKNOWN,
-            m_constants.PowerState.UNKNOWN)
-
-        for expected_state in expected_states:
-            actual_state = self._node.get_power_state()
-            self.assertEqual(expected_state, actual_state)
-
-    def test_get_id(self):
-        self.assertEqual(
-            self._wrapped_node.system_id,
-            self._node.get_id())
-
-    def test_power_on(self):
-        self._node.power_on()
-        self._wrapped_node.power_on.assert_called_once_with()
-
-    def test_power_off(self):
-        self._node.power_off()
-        self._wrapped_node.power_off.assert_called_once_with()
-
-
-class TestMaasHelper(base.TestCase):
-    def setUp(self):
-        super().setUp()
-
-        self._mock_osc = mock.Mock()
-        self._mock_nova_client = self._mock_osc.nova.return_value
-        self._mock_maas_client = self._mock_osc.maas.return_value
-        self._helper = maas.MaasHelper(osc=self._mock_osc)
-
-    def test_list_compute_nodes(self):
-        compute_fqdn = "compute-0"
-        # some other MAAS node, not a Nova node
-        ctrl_fqdn = "ctrl-1"
-
-        mock_machines = [
-            mock.Mock(fqdn=compute_fqdn,
-                      system_id=mock.sentinel.compute_node_id),
-            mock.Mock(fqdn=ctrl_fqdn,
-                      system_id=mock.sentinel.ctrl_node_id),
-        ]
-        mock_hypervisors = [
-            mock.Mock(hypervisor_hostname=compute_fqdn),
-        ]
-
-        self._mock_maas_client.machines.list.return_value = mock_machines
-        self._mock_nova_client.hypervisors.list.return_value = mock_hypervisors
-
-        out_nodes = self._helper.list_compute_nodes()
-        self.assertEqual(1, len(out_nodes))
-
-        out_node = out_nodes[0]
-        self.assertIsInstance(out_node, maas.MaasNode)
-        self.assertEqual(mock.sentinel.compute_node_id, out_node.get_id())
-        self.assertEqual(compute_fqdn, out_node.get_hypervisor_hostname())
-
-    def test_get_node(self):
-        mock_machine = mock.Mock(fqdn='compute-0')
-        self._mock_maas_client.machines.get.return_value = mock_machine
-
-        mock_compute_nodes = [
-            mock.Mock(hypervisor_hostname="compute-011"),
-            mock.Mock(hypervisor_hostname="compute-0"),
-            mock.Mock(hypervisor_hostname="compute-01"),
-        ]
-        self._mock_nova_client.hypervisors.search.return_value = (
-            mock_compute_nodes)
-
-        out_node = self._helper.get_node(mock.sentinel.id)
-
-        self.assertEqual(mock_compute_nodes[1], out_node._nova_node)
-        self.assertEqual(self._mock_maas_client, out_node._maas_client)
-        self.assertEqual(mock_machine, out_node._maas_node)
--- a/watcher/tests/common/test_cinder_helper.py
+++ b/watcher/tests/common/test_cinder_helper.py
@@ -13,10 +13,8 @@
 # limitations under the License.
 #

-from unittest import mock
-
-from http import HTTPStatus
 import time
+from unittest import mock

 from cinderclient import exceptions as cinder_exception

@@ -293,8 +291,7 @@ class TestCinderHelper(base.TestCase):

        volume = self.fake_volume()
        cinder_util.get_volume = mock.MagicMock()
-        cinder_util.get_volume.side_effect =\
-            cinder_exception.NotFound(HTTPStatus.NOT_FOUND)
+        cinder_util.get_volume.side_effect = cinder_exception.NotFound(404)
        result = cinder_util._can_get_volume(volume.id)
        self.assertFalse(result)

@@ -342,7 +339,7 @@ class TestCinderHelper(base.TestCase):
        cinder_util = cinder_helper.CinderHelper()

        volume = self.fake_volume()
-        side_effect = cinder_exception.NotFound(HTTPStatus.NOT_FOUND)
+        side_effect = cinder_exception.NotFound(404)
        cinder_util.cinder.volumes.get.side_effect = side_effect
        cinder_util.cinder.volumes.find.return_value = False
        result = cinder_util.get_volume(volume)
--- a/watcher/tests/common/test_clients.py
+++ b/watcher/tests/common/test_clients.py
@@ -10,6 +10,8 @@
 # License for the specific language governing permissions and limitations
 # under the License.

+from ceilometerclient import client as ceclient
+import ceilometerclient.v2.client as ceclient_v2
 from unittest import mock

 from cinderclient import client as ciclient
@@ -268,6 +270,56 @@ class TestClients(base.TestCase):
        cinder_cached = osc.cinder()
        self.assertEqual(cinder, cinder_cached)

+    @mock.patch.object(ceclient, 'Client')
+    @mock.patch.object(clients.OpenStackClients, 'session')
+    def test_clients_ceilometer(self, mock_session, mock_call):
+        osc = clients.OpenStackClients()
+        osc._ceilometer = None
+        osc.ceilometer()
+        mock_call.assert_called_once_with(
+            CONF.ceilometer_client.api_version,
+            None,
+            endpoint_type=CONF.ceilometer_client.endpoint_type,
+            region_name=CONF.ceilometer_client.region_name,
+            session=mock_session)
+
+    @mock.patch.object(clients.OpenStackClients, 'session')
+    @mock.patch.object(ceclient_v2.Client, '_get_redirect_client')
+    def test_clients_ceilometer_diff_vers(self, mock_get_redirect_client,
+                                          mock_session):
+        '''ceilometerclient currently only has one version (v2)'''
+        mock_get_redirect_client.return_value = [mock.Mock(), mock.Mock()]
+        CONF.set_override('api_version', '2',
+                          group='ceilometer_client')
+        osc = clients.OpenStackClients()
+        osc._ceilometer = None
+        osc.ceilometer()
+        self.assertEqual(ceclient_v2.Client,
+                         type(osc.ceilometer()))
+
+    @mock.patch.object(clients.OpenStackClients, 'session')
+    @mock.patch.object(ceclient_v2.Client, '_get_redirect_client')
+    def test_clients_ceilometer_diff_endpoint(self, mock_get_redirect_client,
+                                              mock_session):
+        mock_get_redirect_client.return_value = [mock.Mock(), mock.Mock()]
+        CONF.set_override('endpoint_type', 'publicURL',
+                          group='ceilometer_client')
+        osc = clients.OpenStackClients()
+        osc._ceilometer = None
+        osc.ceilometer()
+        self.assertEqual('publicURL', osc.ceilometer().http_client.interface)
+
+    @mock.patch.object(clients.OpenStackClients, 'session')
+    @mock.patch.object(ceclient_v2.Client, '_get_redirect_client')
+    def test_clients_ceilometer_cached(self, mock_get_redirect_client,
+                                       mock_session):
+        mock_get_redirect_client.return_value = [mock.Mock(), mock.Mock()]
+        osc = clients.OpenStackClients()
+        osc._ceilometer = None
+        ceilometer = osc.ceilometer()
+        ceilometer_cached = osc.ceilometer()
+        self.assertEqual(ceilometer, ceilometer_cached)
+
    @mock.patch.object(netclient, 'Client')
    @mock.patch.object(clients.OpenStackClients, 'session')
    def test_clients_neutron(self, mock_session, mock_call):
--- a/watcher/tests/common/test_placement_helper.py
+++ b/watcher/tests/common/test_placement_helper.py
@@ -11,7 +11,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.

-from http import HTTPStatus
 from unittest import mock

 from watcher.common import placement_helper
@@ -56,10 +55,10 @@ class TestPlacementHelper(base.TestCase):
        kss_req.assert_called_once_with(url, method, **kwargs)

    def test_get(self, kss_req):
-        kss_req.return_value = fake_requests.FakeResponse(HTTPStatus.OK)
+        kss_req.return_value = fake_requests.FakeResponse(200)
        url = '/resource_providers'
        resp = self.client.get(url)
-        self.assertEqual(HTTPStatus.OK, resp.status_code)
+        self.assertEqual(200, resp.status_code)
        self._assert_keystone_called_once(kss_req, url, 'GET')

    def test_get_resource_providers_OK(self, kss_req):
@@ -77,7 +76,7 @@ class TestPlacementHelper(base.TestCase):
        }

        kss_req.return_value = fake_requests.FakeResponse(
-            HTTPStatus.OK, content=jsonutils.dump_as_bytes(mock_json_data))
+            200, content=jsonutils.dump_as_bytes(mock_json_data))

        result = self.client.get_resource_providers(rp_name)

@@ -100,7 +99,7 @@ class TestPlacementHelper(base.TestCase):
        }

        kss_req.return_value = fake_requests.FakeResponse(
-            HTTPStatus.OK, content=jsonutils.dump_as_bytes(mock_json_data))
+            200, content=jsonutils.dump_as_bytes(mock_json_data))

        result = self.client.get_resource_providers(rp_name)

@@ -111,8 +110,7 @@ class TestPlacementHelper(base.TestCase):
    def test_get_resource_providers_fail(self, kss_req):
        rp_name = 'compute'
        kss_req.return_value = fake_requests.FakeResponse(
-            HTTPStatus.BAD_REQUEST,
-            content=jsonutils.dump_as_bytes(self.fake_err_msg))
+            400, content=jsonutils.dump_as_bytes(self.fake_err_msg))
        result = self.client.get_resource_providers(rp_name)
        self.assertIsNone(result)

@@ -151,7 +149,7 @@ class TestPlacementHelper(base.TestCase):
        }

        kss_req.return_value = fake_requests.FakeResponse(
-            HTTPStatus.OK, content=jsonutils.dump_as_bytes(mock_json_data))
+            200, content=jsonutils.dump_as_bytes(mock_json_data))

        result = self.client.get_inventories(rp_uuid)

@@ -162,8 +160,7 @@ class TestPlacementHelper(base.TestCase):
    def test_get_inventories_fail(self, kss_req):
        rp_uuid = uuidutils.generate_uuid()
        kss_req.return_value = fake_requests.FakeResponse(
-            HTTPStatus.NOT_FOUND,
-            content=jsonutils.dump_as_bytes(self.fake_err_msg))
+            404, content=jsonutils.dump_as_bytes(self.fake_err_msg))
        result = self.client.get_inventories(rp_uuid)
        self.assertIsNone(result)

@@ -178,7 +175,7 @@ class TestPlacementHelper(base.TestCase):
        }

        kss_req.return_value = fake_requests.FakeResponse(
-            HTTPStatus.OK, content=jsonutils.dump_as_bytes(mock_json_data))
+            200, content=jsonutils.dump_as_bytes(mock_json_data))

        result = self.client.get_provider_traits(rp_uuid)

@@ -189,8 +186,7 @@ class TestPlacementHelper(base.TestCase):
    def test_get_provider_traits_fail(self, kss_req):
        rp_uuid = uuidutils.generate_uuid()
        kss_req.return_value = fake_requests.FakeResponse(
-            HTTPStatus.NOT_FOUND,
-            content=jsonutils.dump_as_bytes(self.fake_err_msg))
+            404, content=jsonutils.dump_as_bytes(self.fake_err_msg))
        result = self.client.get_provider_traits(rp_uuid)
        self.assertIsNone(result)

@@ -220,7 +216,7 @@ class TestPlacementHelper(base.TestCase):
        }

        kss_req.return_value = fake_requests.FakeResponse(
-            HTTPStatus.OK, content=jsonutils.dump_as_bytes(mock_json_data))
+            200, content=jsonutils.dump_as_bytes(mock_json_data))

        result = self.client.get_allocations_for_consumer(c_uuid)

@@ -231,8 +227,7 @@ class TestPlacementHelper(base.TestCase):
    def test_get_allocations_for_consumer_fail(self, kss_req):
        c_uuid = uuidutils.generate_uuid()
        kss_req.return_value = fake_requests.FakeResponse(
-            HTTPStatus.NOT_FOUND,
-            content=jsonutils.dump_as_bytes(self.fake_err_msg))
+            404, content=jsonutils.dump_as_bytes(self.fake_err_msg))
        result = self.client.get_allocations_for_consumer(c_uuid)
        self.assertIsNone(result)

@@ -250,7 +245,7 @@ class TestPlacementHelper(base.TestCase):
        }

        kss_req.return_value = fake_requests.FakeResponse(
-            HTTPStatus.OK, content=jsonutils.dump_as_bytes(mock_json_data))
+            200, content=jsonutils.dump_as_bytes(mock_json_data))

        result = self.client.get_usages_for_resource_provider(rp_uuid)

@@ -261,8 +256,7 @@ class TestPlacementHelper(base.TestCase):
    def test_get_usages_for_resource_provider_fail(self, kss_req):
        rp_uuid = uuidutils.generate_uuid()
        kss_req.return_value = fake_requests.FakeResponse(
-            HTTPStatus.NOT_FOUND,
-            content=jsonutils.dump_as_bytes(self.fake_err_msg))
+            404, content=jsonutils.dump_as_bytes(self.fake_err_msg))
        result = self.client.get_usages_for_resource_provider(rp_uuid)
        self.assertIsNone(result)

@@ -302,7 +296,7 @@ class TestPlacementHelper(base.TestCase):
        }

        kss_req.return_value = fake_requests.FakeResponse(
-            HTTPStatus.OK, content=jsonutils.dump_as_bytes(mock_json_data))
+            200, content=jsonutils.dump_as_bytes(mock_json_data))

        result = self.client.get_candidate_providers(resources)

@@ -313,7 +307,6 @@ class TestPlacementHelper(base.TestCase):
    def test_get_candidate_providers_fail(self, kss_req):
        rp_uuid = uuidutils.generate_uuid()
        kss_req.return_value = fake_requests.FakeResponse(
-            HTTPStatus.NOT_FOUND,
-            content=jsonutils.dump_as_bytes(self.fake_err_msg))
+            404, content=jsonutils.dump_as_bytes(self.fake_err_msg))
        result = self.client.get_candidate_providers(rp_uuid)
        self.assertIsNone(result)
--- a/watcher/tests/common/test_service.py
+++ b/watcher/tests/common/test_service.py
@@ -80,13 +80,13 @@ class TestService(base.TestCase):
        super(TestService, self).setUp()

    @mock.patch.object(om.rpc.server, "RPCServer")
-    def _test_start(self, m_handler):
+    def test_start(self, m_handler):
        dummy_service = service.Service(DummyManager)
        dummy_service.start()
        self.assertEqual(1, m_handler.call_count)

    @mock.patch.object(om.rpc.server, "RPCServer")
-    def _test_stop(self, m_handler):
+    def test_stop(self, m_handler):
        dummy_service = service.Service(DummyManager)
        dummy_service.stop()
        self.assertEqual(1, m_handler.call_count)
--- a/watcher/tests/common/test_utils.py
+++ b/watcher/tests/common/test_utils.py
@@ -1,52 +0,0 @@
-# Copyright 2023 Cloudbase Solutions
-# All Rights Reserved.
-#
-#    Licensed under the Apache License, Version 2.0 (the "License"); you may
-#    not use this file except in compliance with the License. You may obtain
-#    a copy of the License at
-#
-#         http://www.apache.org/licenses/LICENSE-2.0
-#
-#    Unless required by applicable law or agreed to in writing, software
-#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-#    License for the specific language governing permissions and limitations
-#    under the License.
-
-import asyncio
-import time
-from unittest import mock
-
-from watcher.common import utils
-from watcher.tests import base
-
-
-class TestCommonUtils(base.TestCase):
-    async def test_coro(self, sleep=0, raise_exc=None):
-        time.sleep(sleep)
-        if raise_exc:
-            raise raise_exc
-        return mock.sentinel.ret_val
-
-    def test_async_compat(self):
-        ret_val = utils.async_compat_call(self.test_coro)
-        self.assertEqual(mock.sentinel.ret_val, ret_val)
-
-    def test_async_compat_exc(self):
-        self.assertRaises(
-            IOError,
-            utils.async_compat_call,
-            self.test_coro,
-            raise_exc=IOError('fake error'))
-
-    def test_async_compat_timeout(self):
-        # Timeout not reached.
-        ret_val = utils.async_compat_call(self.test_coro, timeout=10)
-        self.assertEqual(mock.sentinel.ret_val, ret_val)
-
-        # Timeout reached.
-        self.assertRaises(
-            asyncio.TimeoutError,
-            utils.async_compat_call,
-            self.test_coro,
-            sleep=0.5, timeout=0.1)
--- a/watcher/tests/decision_engine/datasources/test_ceilometer_helper.py
+++ b/watcher/tests/decision_engine/datasources/test_ceilometer_helper.py
@@ -0,0 +1,168 @@
+# -*- encoding: utf-8 -*-
+# Copyright (c) 2015 b<>com
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from unittest import mock
+
+from watcher.common import clients
+from watcher.common import exception
+from watcher.decision_engine.datasources import ceilometer as ceilometer_helper
+from watcher.tests import base
+
+
+@mock.patch.object(clients.OpenStackClients, 'ceilometer')
+class TestCeilometerHelper(base.BaseTestCase):
+
+    def setUp(self):
+        super(TestCeilometerHelper, self).setUp()
+        self.osc_mock = mock.Mock()
+        self.helper = ceilometer_helper.CeilometerHelper(osc=self.osc_mock)
+        stat_agg_patcher = mock.patch.object(
+            self.helper, 'statistic_aggregation',
+            spec=ceilometer_helper.CeilometerHelper.statistic_aggregation)
+        self.mock_aggregation = stat_agg_patcher.start()
+        self.addCleanup(stat_agg_patcher.stop)
+
+    def test_build_query(self, mock_ceilometer):
+        mock_ceilometer.return_value = mock.MagicMock()
+        cm = ceilometer_helper.CeilometerHelper()
+        expected = [{'field': 'user_id', 'op': 'eq', 'value': u'user_id'},
+                    {'field': 'project_id', 'op': 'eq', 'value': u'tenant_id'},
+                    {'field': 'resource_id', 'op': 'eq',
+                     'value': u'resource_id'}]
+
+        query = cm.build_query(user_id="user_id",
+                               tenant_id="tenant_id",
+                               resource_id="resource_id",
+                               user_ids=["user_ids"],
+                               tenant_ids=["tenant_ids"],
+                               resource_ids=["resource_ids"])
+        self.assertEqual(expected, query)
+
+    def test_statistic_aggregation(self, mock_ceilometer):
+        ceilometer = mock.MagicMock()
+        statistic = mock.MagicMock()
+        expected_result = 100
+        statistic[-1]._info = {'aggregate': {'avg': expected_result}}
+        ceilometer.statistics.list.return_value = statistic
+        mock_ceilometer.return_value = ceilometer
+        cm = ceilometer_helper.CeilometerHelper()
+        val = cm.statistic_aggregation(
+            resource=mock.Mock(id="INSTANCE_ID"),
+            resource_type='instance',
+            meter_name="instance_cpu_usage",
+            period="7300",
+            granularity=None
+        )
+        self.assertEqual(expected_result, val)
+
+    def test_statistic_aggregation_metric_unavailable(self, mock_ceilometer):
+        helper = ceilometer_helper.CeilometerHelper()
+
+        # invalidate instance_cpu_usage in metric map
+        original_metric_value = helper.METRIC_MAP.get('instance_cpu_usage')
+        helper.METRIC_MAP.update(
+            instance_cpu_usage=None
+        )
+
+        self.assertRaises(
+            exception.MetricNotAvailable,
+            helper.statistic_aggregation, resource=mock.Mock(id="INSTANCE_ID"),
+            resource_type='instance', meter_name="instance_cpu_usage",
+            period="7300",
+            granularity=None
+        )
+
+        # restore the metric map as it is a static attribute that does not get
+        # restored between unit tests!
+        helper.METRIC_MAP.update(
+            instance_cpu_usage=original_metric_value
+        )
+
+    def test_get_host_cpu_usage(self, mock_ceilometer):
+        self.helper.get_host_cpu_usage('compute1', 600, 'mean')
+        self.mock_aggregation.assert_called_once_with(
+            'compute1', 'compute_node', 'host_cpu_usage', 600, 'mean', None)
+
+    def test_get_host_ram_usage(self, mock_ceilometer):
+        self.helper.get_host_ram_usage('compute1', 600, 'mean')
+        self.mock_aggregation.assert_called_once_with(
+            'compute1', 'compute_node', 'host_ram_usage', 600, 'mean', None)
+
+    def test_get_host_outlet_temp(self, mock_ceilometer):
+        self.helper.get_host_outlet_temp('compute1', 600, 'mean')
+        self.mock_aggregation.assert_called_once_with(
+            'compute1', 'compute_node', 'host_outlet_temp', 600, 'mean', None)
+
+    def test_get_host_inlet_temp(self, mock_ceilometer):
+        self.helper.get_host_inlet_temp('compute1', 600, 'mean')
+        self.mock_aggregation.assert_called_once_with(
+            'compute1', 'compute_node', 'host_inlet_temp', 600, 'mean', None)
+
+    def test_get_host_airflow(self, mock_ceilometer):
+        self.helper.get_host_airflow('compute1', 600, 'mean')
+        self.mock_aggregation.assert_called_once_with(
+            'compute1', 'compute_node', 'host_airflow', 600, 'mean', None)
+
+    def test_get_host_power(self, mock_ceilometer):
+        self.helper.get_host_power('compute1', 600, 'mean')
+        self.mock_aggregation.assert_called_once_with(
+            'compute1', 'compute_node', 'host_power', 600, 'mean', None)
+
+    def test_get_instance_cpu_usage(self, mock_ceilometer):
+        self.helper.get_instance_cpu_usage('compute1', 600, 'mean')
+        self.mock_aggregation.assert_called_once_with(
+            'compute1', 'instance', 'instance_cpu_usage', 600, 'mean',
+            None)
+
+    def test_get_instance_ram_usage(self, mock_ceilometer):
+        self.helper.get_instance_ram_usage('compute1', 600, 'mean')
+        self.mock_aggregation.assert_called_once_with(
+            'compute1', 'instance', 'instance_ram_usage', 600, 'mean',
+            None)
+
+    def test_get_instance_ram_allocated(self, mock_ceilometer):
+        self.helper.get_instance_ram_allocated('compute1', 600, 'mean')
+        self.mock_aggregation.assert_called_once_with(
+            'compute1', 'instance', 'instance_ram_allocated', 600, 'mean',
+            None)
+
+    def test_get_instance_l3_cache_usage(self, mock_ceilometer):
+        self.helper.get_instance_l3_cache_usage('compute1', 600, 'mean')
+        self.mock_aggregation.assert_called_once_with(
+            'compute1', 'instance', 'instance_l3_cache_usage', 600, 'mean',
+            None)
+
+    def test_get_instance_root_disk_size(self, mock_ceilometer):
+        self.helper.get_instance_root_disk_size('compute1', 600, 'mean')
+        self.mock_aggregation.assert_called_once_with(
+            'compute1', 'instance', 'instance_root_disk_size', 600, 'mean',
+            None)
+
+    def test_check_availability(self, mock_ceilometer):
+        ceilometer = mock.MagicMock()
+        ceilometer.resources.list.return_value = True
+        mock_ceilometer.return_value = ceilometer
+        helper = ceilometer_helper.CeilometerHelper()
+        result = helper.check_availability()
+        self.assertEqual('available', result)
+
+    def test_check_availability_with_failure(self, mock_ceilometer):
+        ceilometer = mock.MagicMock()
+        ceilometer.resources.list.side_effect = Exception()
+        mock_ceilometer.return_value = ceilometer
+        helper = ceilometer_helper.CeilometerHelper()
+
+        self.assertEqual('not available', helper.check_availability())
--- a/watcher/tests/decision_engine/datasources/test_gnocchi_helper.py
+++ b/watcher/tests/decision_engine/datasources/test_gnocchi_helper.py
@@ -40,25 +40,17 @@ class TestGnocchiHelper(base.BaseTestCase):
        self.addCleanup(stat_agg_patcher.stop)

    def test_gnocchi_statistic_aggregation(self, mock_gnocchi):
-        vcpus = 2
-        mock_instance = mock.Mock(
-            id='16a86790-327a-45f9-bc82-45839f062fdc',
-            vcpus=vcpus)
-
        gnocchi = mock.MagicMock()
-        # cpu time rate of change (ns)
-        mock_rate_measure = 360 * 10e+8 * vcpus * 5.5 / 100
        expected_result = 5.5

-        expected_measures = [
-            ["2017-02-02T09:00:00.000000", 360, mock_rate_measure]]
+        expected_measures = [["2017-02-02T09:00:00.000000", 360, 5.5]]

        gnocchi.metric.get_measures.return_value = expected_measures
        mock_gnocchi.return_value = gnocchi

        helper = gnocchi_helper.GnocchiHelper()
        result = helper.statistic_aggregation(
-            resource=mock_instance,
+            resource=mock.Mock(id='16a86790-327a-45f9-bc82-45839f062fdc'),
            resource_type='instance',
            meter_name='instance_cpu_usage',
            period=300,
@@ -67,14 +59,6 @@ class TestGnocchiHelper(base.BaseTestCase):
        )
        self.assertEqual(expected_result, result)

-        gnocchi.metric.get_measures.assert_called_once_with(
-            metric="cpu",
-            start=mock.ANY,
-            stop=mock.ANY,
-            resource_id=mock_instance.uuid,
-            granularity=360,
-            aggregation="rate:mean")
-
    def test_gnocchi_statistic_series(self, mock_gnocchi):
        gnocchi = mock.MagicMock()
        expected_result = {
--- a/watcher/tests/decision_engine/datasources/test_grafana_helper.py
+++ b/watcher/tests/decision_engine/datasources/test_grafana_helper.py
@@ -26,7 +26,6 @@ from watcher.common import exception
 from watcher.decision_engine.datasources import grafana
 from watcher.tests import base

-from http import HTTPStatus
 import requests

 CONF = cfg.CONF
@@ -129,7 +128,7 @@ class TestGrafana(base.BaseTestCase):
        problems.
        """

-        m_request.return_value = mock.Mock(status_code=HTTPStatus.NOT_FOUND)
+        m_request.return_value = mock.Mock(status_code=404)

        t_grafana = grafana.GrafanaHelper(osc=mock.Mock())

--- a/watcher/tests/decision_engine/fake_metal_helper.py
+++ b/watcher/tests/decision_engine/fake_metal_helper.py
@@ -1,47 +0,0 @@
-# Copyright (c) 2023 Cloudbase Solutions
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#    http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
-# implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-from unittest import mock
-import uuid
-
-from watcher.common.metal_helper import constants as m_constants
-
-
-def get_mock_metal_node(node_id=None,
-                        power_state=m_constants.PowerState.ON,
-                        running_vms=0,
-                        hostname=None,
-                        compute_state='up'):
-    node_id = node_id or str(uuid.uuid4())
-    # NOTE(lpetrut): the hostname is important for some of the tests,
-    # which expect it to match the fake cluster model.
-    hostname = hostname or "compute-" + str(uuid.uuid4()).split('-')[0]
-
-    hypervisor_node_dict = {
-        'hypervisor_hostname': hostname,
-        'running_vms': running_vms,
-        'service': {
-            'host': hostname,
-        },
-        'state': compute_state,
-    }
-    hypervisor_node = mock.Mock(**hypervisor_node_dict)
-    hypervisor_node.to_dict.return_value = hypervisor_node_dict
-
-    node = mock.Mock()
-    node.get_power_state.return_value = power_state
-    node.get_id.return_value = uuid
-    node.get_hypervisor_node.return_value = hypervisor_node
-    return node
--- a/watcher/tests/decision_engine/model/faker_cluster_and_metrics.py
+++ b/watcher/tests/decision_engine/model/faker_cluster_and_metrics.py
@@ -80,7 +80,7 @@ class FakerModelCollector(base.BaseClusterDataModelCollector):
        return self.load_model('scenario_4_with_metrics.xml')


-class FakeGnocchiMetrics(object):
+class FakeCeilometerMetrics(object):
    def __init__(self, model):
        self.model = model

@@ -90,9 +90,6 @@ class FakeGnocchiMetrics(object):
        if meter_name == 'host_cpu_usage':
            return self.get_compute_node_cpu_util(
                resource, period, aggregate, granularity)
-        elif meter_name == 'host_ram_usage':
-            return self.get_compute_node_ram_util(
-                resource, period, aggregate, granularity)
        elif meter_name == 'instance_cpu_usage':
            return self.get_instance_cpu_util(
                resource, period, aggregate, granularity)
@@ -113,28 +110,18 @@ class FakeGnocchiMetrics(object):
        Returns relative node CPU utilization <0, 100>.
        :param r_id: resource id
        """
-        node = self.model.get_node_by_uuid(resource.uuid)
+        node_uuid = '%s_%s' % (resource.uuid, resource.hostname)
+        node = self.model.get_node_by_uuid(node_uuid)
        instances = self.model.get_node_instances(node)
        util_sum = 0.0
-        for instance in instances:
+        for instance_uuid in instances:
+            instance = self.model.get_instance_by_uuid(instance_uuid)
            total_cpu_util = instance.vcpus * self.get_instance_cpu_util(
-                instance, period, aggregate, granularity)
+                instance.uuid)
            util_sum += total_cpu_util / 100.0
        util_sum /= node.vcpus
        return util_sum * 100.0

-    def get_compute_node_ram_util(self, resource, period, aggregate,
-                                  granularity):
-        # Returns mock host ram usage in KB based on the allocated
-        # instances.
-        node = self.model.get_node_by_uuid(resource.uuid)
-        instances = self.model.get_node_instances(node)
-        util_sum = 0.0
-        for instance in instances:
-            util_sum += self.get_instance_ram_util(
-                instance, period, aggregate, granularity)
-        return util_sum / 1024
-
    @staticmethod
    def get_instance_cpu_util(resource, period, aggregate,
                              granularity):
@@ -184,7 +171,93 @@ class FakeGnocchiMetrics(object):
        return instance_disk_util[str(resource.uuid)]


-# TODO(lpetrut): consider dropping Ceilometer support, it was deprecated
-# in Ocata.
-class FakeCeilometerMetrics(FakeGnocchiMetrics):
-    pass
+class FakeGnocchiMetrics(object):
+    def __init__(self, model):
+        self.model = model
+
+    def mock_get_statistics(self, resource=None, resource_type=None,
+                            meter_name=None, period=300, aggregate='mean',
+                            granularity=300):
+        if meter_name == 'host_cpu_usage':
+            return self.get_compute_node_cpu_util(
+                resource, period, aggregate, granularity)
+        elif meter_name == 'instance_cpu_usage':
+            return self.get_instance_cpu_util(
+                resource, period, aggregate, granularity)
+        elif meter_name == 'instance_ram_usage':
+            return self.get_instance_ram_util(
+                resource, period, aggregate, granularity)
+        elif meter_name == 'instance_root_disk_size':
+            return self.get_instance_disk_root_size(
+                resource, period, aggregate, granularity)
+
+    def get_compute_node_cpu_util(self, resource, period, aggregate,
+                                  granularity):
+        """Calculates node utilization dynamicaly.
+
+        node CPU utilization should consider
+        and corelate with actual instance-node mappings
+        provided within a cluster model.
+        Returns relative node CPU utilization <0, 100>.
+
+        :param r_id: resource id
+        """
+        node_uuid = "%s_%s" % (resource.uuid, resource.hostname)
+        node = self.model.get_node_by_uuid(node_uuid)
+        instances = self.model.get_node_instances(node)
+        util_sum = 0.0
+        for instance_uuid in instances:
+            instance = self.model.get_instance_by_uuid(instance_uuid)
+            total_cpu_util = instance.vcpus * self.get_instance_cpu_util(
+                instance.uuid)
+            util_sum += total_cpu_util / 100.0
+        util_sum /= node.vcpus
+        return util_sum * 100.0
+
+    @staticmethod
+    def get_instance_cpu_util(resource, period, aggregate,
+                              granularity):
+        instance_cpu_util = dict()
+        instance_cpu_util['INSTANCE_0'] = 10
+        instance_cpu_util['INSTANCE_1'] = 30
+        instance_cpu_util['INSTANCE_2'] = 60
+        instance_cpu_util['INSTANCE_3'] = 20
+        instance_cpu_util['INSTANCE_4'] = 40
+        instance_cpu_util['INSTANCE_5'] = 50
+        instance_cpu_util['INSTANCE_6'] = 100
+        instance_cpu_util['INSTANCE_7'] = 100
+        instance_cpu_util['INSTANCE_8'] = 100
+        instance_cpu_util['INSTANCE_9'] = 100
+        return instance_cpu_util[str(resource.uuid)]
+
+    @staticmethod
+    def get_instance_ram_util(resource, period, aggregate,
+                              granularity):
+        instance_ram_util = dict()
+        instance_ram_util['INSTANCE_0'] = 1
+        instance_ram_util['INSTANCE_1'] = 2
+        instance_ram_util['INSTANCE_2'] = 4
+        instance_ram_util['INSTANCE_3'] = 8
+        instance_ram_util['INSTANCE_4'] = 3
+        instance_ram_util['INSTANCE_5'] = 2
+        instance_ram_util['INSTANCE_6'] = 1
+        instance_ram_util['INSTANCE_7'] = 2
+        instance_ram_util['INSTANCE_8'] = 4
+        instance_ram_util['INSTANCE_9'] = 8
+        return instance_ram_util[str(resource.uuid)]
+
+    @staticmethod
+    def get_instance_disk_root_size(resource, period, aggregate,
+                                    granularity):
+        instance_disk_util = dict()
+        instance_disk_util['INSTANCE_0'] = 10
+        instance_disk_util['INSTANCE_1'] = 15
+        instance_disk_util['INSTANCE_2'] = 30
+        instance_disk_util['INSTANCE_3'] = 35
+        instance_disk_util['INSTANCE_4'] = 20
+        instance_disk_util['INSTANCE_5'] = 25
+        instance_disk_util['INSTANCE_6'] = 25
+        instance_disk_util['INSTANCE_7'] = 25
+        instance_disk_util['INSTANCE_8'] = 25
+        instance_disk_util['INSTANCE_9'] = 25
+        return instance_disk_util[str(resource.uuid)]
--- a/watcher/tests/decision_engine/strategy/strategies/test_saving_energy.py
+++ b/watcher/tests/decision_engine/strategy/strategies/test_saving_energy.py
@@ -18,10 +18,8 @@
 from unittest import mock

 from watcher.common import clients
-from watcher.common.metal_helper import constants as m_constants
 from watcher.common import utils
 from watcher.decision_engine.strategy import strategies
-from watcher.tests.decision_engine import fake_metal_helper
 from watcher.tests.decision_engine.strategy.strategies.test_base \
    import TestBaseStrategy

@@ -31,15 +29,26 @@ class TestSavingEnergy(TestBaseStrategy):
    def setUp(self):
        super(TestSavingEnergy, self).setUp()

-        self.fake_nodes = [fake_metal_helper.get_mock_metal_node(),
-                           fake_metal_helper.get_mock_metal_node()]
-        self._metal_helper = mock.Mock()
-        self._metal_helper.list_compute_nodes.return_value = self.fake_nodes
+        mock_node1_dict = {
+            'uuid': '922d4762-0bc5-4b30-9cb9-48ab644dd861'}
+        mock_node2_dict = {
+            'uuid': '922d4762-0bc5-4b30-9cb9-48ab644dd862'}
+        mock_node1 = mock.Mock(**mock_node1_dict)
+        mock_node2 = mock.Mock(**mock_node2_dict)
+        self.fake_nodes = [mock_node1, mock_node2]

-        p_nova = mock.patch.object(clients.OpenStackClients, 'nova')
+        p_ironic = mock.patch.object(
+            clients.OpenStackClients, 'ironic')
+        self.m_ironic = p_ironic.start()
+        self.addCleanup(p_ironic.stop)
+
+        p_nova = mock.patch.object(
+            clients.OpenStackClients, 'nova')
        self.m_nova = p_nova.start()
        self.addCleanup(p_nova.stop)

+        self.m_ironic.node.list.return_value = self.fake_nodes
+
        self.m_c_model.return_value = self.fake_c_cluster.generate_scenario_1()

        self.strategy = strategies.SavingEnergy(
@@ -50,20 +59,27 @@ class TestSavingEnergy(TestBaseStrategy):
             'min_free_hosts_num': 1})
        self.strategy.free_used_percent = 10.0
        self.strategy.min_free_hosts_num = 1
-        self.strategy._metal_helper = self._metal_helper
+        self.strategy._ironic_client = self.m_ironic
        self.strategy._nova_client = self.m_nova

    def test_get_hosts_pool_with_vms_node_pool(self):
-        self._metal_helper.list_compute_nodes.return_value = [
-            fake_metal_helper.get_mock_metal_node(
-                power_state=m_constants.PowerState.ON,
-                hostname='hostname_0',
-                running_vms=2),
-            fake_metal_helper.get_mock_metal_node(
-                power_state=m_constants.PowerState.OFF,
-                hostname='hostname_1',
-                running_vms=2),
-        ]
+        mock_node1_dict = {
+            'extra': {'compute_node_id': 1},
+            'power_state': 'power on'}
+        mock_node2_dict = {
+            'extra': {'compute_node_id': 2},
+            'power_state': 'power off'}
+        mock_node1 = mock.Mock(**mock_node1_dict)
+        mock_node2 = mock.Mock(**mock_node2_dict)
+        self.m_ironic.node.get.side_effect = [mock_node1, mock_node2]
+
+        mock_hyper1 = mock.Mock()
+        mock_hyper2 = mock.Mock()
+        mock_hyper1.to_dict.return_value = {
+            'running_vms': 2, 'service': {'host': 'hostname_0'}, 'state': 'up'}
+        mock_hyper2.to_dict.return_value = {
+            'running_vms': 2, 'service': {'host': 'hostname_1'}, 'state': 'up'}
+        self.m_nova.hypervisors.get.side_effect = [mock_hyper1, mock_hyper2]

        self.strategy.get_hosts_pool()

@@ -72,16 +88,23 @@ class TestSavingEnergy(TestBaseStrategy):
        self.assertEqual(len(self.strategy.free_poweroff_node_pool), 0)

    def test_get_hosts_pool_free_poweron_node_pool(self):
-        self._metal_helper.list_compute_nodes.return_value = [
-            fake_metal_helper.get_mock_metal_node(
-                power_state=m_constants.PowerState.ON,
-                hostname='hostname_0',
-                running_vms=0),
-            fake_metal_helper.get_mock_metal_node(
-                power_state=m_constants.PowerState.ON,
-                hostname='hostname_1',
-                running_vms=0),
-        ]
+        mock_node1_dict = {
+            'extra': {'compute_node_id': 1},
+            'power_state': 'power on'}
+        mock_node2_dict = {
+            'extra': {'compute_node_id': 2},
+            'power_state': 'power on'}
+        mock_node1 = mock.Mock(**mock_node1_dict)
+        mock_node2 = mock.Mock(**mock_node2_dict)
+        self.m_ironic.node.get.side_effect = [mock_node1, mock_node2]
+
+        mock_hyper1 = mock.Mock()
+        mock_hyper2 = mock.Mock()
+        mock_hyper1.to_dict.return_value = {
+            'running_vms': 0, 'service': {'host': 'hostname_0'}, 'state': 'up'}
+        mock_hyper2.to_dict.return_value = {
+            'running_vms': 0, 'service': {'host': 'hostname_1'}, 'state': 'up'}
+        self.m_nova.hypervisors.get.side_effect = [mock_hyper1, mock_hyper2]

        self.strategy.get_hosts_pool()

@@ -90,16 +113,23 @@ class TestSavingEnergy(TestBaseStrategy):
        self.assertEqual(len(self.strategy.free_poweroff_node_pool), 0)

    def test_get_hosts_pool_free_poweroff_node_pool(self):
-        self._metal_helper.list_compute_nodes.return_value = [
-            fake_metal_helper.get_mock_metal_node(
-                power_state=m_constants.PowerState.OFF,
-                hostname='hostname_0',
-                running_vms=0),
-            fake_metal_helper.get_mock_metal_node(
-                power_state=m_constants.PowerState.OFF,
-                hostname='hostname_1',
-                running_vms=0),
-        ]
+        mock_node1_dict = {
+            'extra': {'compute_node_id': 1},
+            'power_state': 'power off'}
+        mock_node2_dict = {
+            'extra': {'compute_node_id': 2},
+            'power_state': 'power off'}
+        mock_node1 = mock.Mock(**mock_node1_dict)
+        mock_node2 = mock.Mock(**mock_node2_dict)
+        self.m_ironic.node.get.side_effect = [mock_node1, mock_node2]
+
+        mock_hyper1 = mock.Mock()
+        mock_hyper2 = mock.Mock()
+        mock_hyper1.to_dict.return_value = {
+            'running_vms': 0, 'service': {'host': 'hostname_0'}, 'state': 'up'}
+        mock_hyper2.to_dict.return_value = {
+            'running_vms': 0, 'service': {'host': 'hostname_1'}, 'state': 'up'}
+        self.m_nova.hypervisors.get.side_effect = [mock_hyper1, mock_hyper2]

        self.strategy.get_hosts_pool()

@@ -108,16 +138,26 @@ class TestSavingEnergy(TestBaseStrategy):
        self.assertEqual(len(self.strategy.free_poweroff_node_pool), 2)

    def test_get_hosts_pool_with_node_out_model(self):
-        self._metal_helper.list_compute_nodes.return_value = [
-            fake_metal_helper.get_mock_metal_node(
-                power_state=m_constants.PowerState.OFF,
-                hostname='hostname_0',
-                running_vms=0),
-            fake_metal_helper.get_mock_metal_node(
-                power_state=m_constants.PowerState.OFF,
-                hostname='hostname_10',
-                running_vms=0),
-        ]
+        mock_node1_dict = {
+            'extra': {'compute_node_id': 1},
+            'power_state': 'power off'}
+        mock_node2_dict = {
+            'extra': {'compute_node_id': 2},
+            'power_state': 'power off'}
+        mock_node1 = mock.Mock(**mock_node1_dict)
+        mock_node2 = mock.Mock(**mock_node2_dict)
+        self.m_ironic.node.get.side_effect = [mock_node1, mock_node2]
+
+        mock_hyper1 = mock.Mock()
+        mock_hyper2 = mock.Mock()
+        mock_hyper1.to_dict.return_value = {
+            'running_vms': 0, 'service': {'host': 'hostname_0'},
+            'state': 'up'}
+        mock_hyper2.to_dict.return_value = {
+            'running_vms': 0, 'service': {'host': 'hostname_10'},
+            'state': 'up'}
+        self.m_nova.hypervisors.get.side_effect = [mock_hyper1, mock_hyper2]
+
        self.strategy.get_hosts_pool()

        self.assertEqual(len(self.strategy.with_vms_node_pool), 0)
@@ -126,9 +166,9 @@ class TestSavingEnergy(TestBaseStrategy):

    def test_save_energy_poweron(self):
        self.strategy.free_poweroff_node_pool = [
-            fake_metal_helper.get_mock_metal_node(),
-            fake_metal_helper.get_mock_metal_node(),
-        ]
+            mock.Mock(uuid='922d4762-0bc5-4b30-9cb9-48ab644dd861'),
+            mock.Mock(uuid='922d4762-0bc5-4b30-9cb9-48ab644dd862')
+            ]
        self.strategy.save_energy()
        self.assertEqual(len(self.strategy.solution.actions), 1)
        action = self.strategy.solution.actions[0]
@@ -145,16 +185,23 @@ class TestSavingEnergy(TestBaseStrategy):
        self.assertEqual(action.get('input_parameters').get('state'), 'off')

    def test_execute(self):
-        self._metal_helper.list_compute_nodes.return_value = [
-            fake_metal_helper.get_mock_metal_node(
-                power_state=m_constants.PowerState.ON,
-                hostname='hostname_0',
-                running_vms=0),
-            fake_metal_helper.get_mock_metal_node(
-                power_state=m_constants.PowerState.ON,
-                hostname='hostname_1',
-                running_vms=0),
-        ]
+        mock_node1_dict = {
+            'extra': {'compute_node_id': 1},
+            'power_state': 'power on'}
+        mock_node2_dict = {
+            'extra': {'compute_node_id': 2},
+            'power_state': 'power on'}
+        mock_node1 = mock.Mock(**mock_node1_dict)
+        mock_node2 = mock.Mock(**mock_node2_dict)
+        self.m_ironic.node.get.side_effect = [mock_node1, mock_node2]
+
+        mock_hyper1 = mock.Mock()
+        mock_hyper2 = mock.Mock()
+        mock_hyper1.to_dict.return_value = {
+            'running_vms': 0, 'service': {'host': 'hostname_0'}, 'state': 'up'}
+        mock_hyper2.to_dict.return_value = {
+            'running_vms': 0, 'service': {'host': 'hostname_1'}, 'state': 'up'}
+        self.m_nova.hypervisors.get.side_effect = [mock_hyper1, mock_hyper2]

        model = self.fake_c_cluster.generate_scenario_1()
        self.m_c_model.return_value = model
--- a/watcher/tests/decision_engine/strategy/strategies/test_vm_workload_consolidation.py
+++ b/watcher/tests/decision_engine/strategy/strategies/test_vm_workload_consolidation.py
@@ -64,10 +64,6 @@ class TestVMWorkloadConsolidation(TestBaseStrategy):
                self.fake_metrics.get_instance_ram_util),
            get_instance_root_disk_size=(
                self.fake_metrics.get_instance_disk_root_size),
-            get_host_cpu_usage=(
-                self.fake_metrics.get_compute_node_cpu_util),
-            get_host_ram_usage=(
-                self.fake_metrics.get_compute_node_ram_util)
            )
        self.strategy = strategies.VMWorkloadConsolidation(
            config=mock.Mock(datasources=self.datasource))
@@ -92,71 +88,6 @@ class TestVMWorkloadConsolidation(TestBaseStrategy):
            node_util,
            self.strategy.get_node_utilization(node_0))

-    def test_get_node_utilization_using_host_metrics(self):
-        model = self.fake_c_cluster.generate_scenario_1()
-        self.m_c_model.return_value = model
-        self.fake_metrics.model = model
-        node_0 = model.get_node_by_uuid("Node_0")
-
-        # "get_node_utilization" is expected to return the maximum
-        # between the host metrics and the sum of the instance metrics.
-        data_src = self.m_datasource.return_value
-        cpu_usage = 30
-        data_src.get_host_cpu_usage = mock.Mock(return_value=cpu_usage)
-        data_src.get_host_ram_usage = mock.Mock(return_value=512 * 1024)
-
-        exp_cpu_usage = cpu_usage * node_0.vcpus / 100
-        exp_node_util = dict(cpu=exp_cpu_usage, ram=512, disk=10)
-        self.assertEqual(
-            exp_node_util,
-            self.strategy.get_node_utilization(node_0))
-
-    def test_get_node_utilization_after_migrations(self):
-        model = self.fake_c_cluster.generate_scenario_1()
-        self.m_c_model.return_value = model
-        self.fake_metrics.model = model
-        node_0 = model.get_node_by_uuid("Node_0")
-        node_1 = model.get_node_by_uuid("Node_1")
-
-        data_src = self.m_datasource.return_value
-        cpu_usage = 30
-        host_ram_usage_mb = 512
-        data_src.get_host_cpu_usage = mock.Mock(return_value=cpu_usage)
-        data_src.get_host_ram_usage = mock.Mock(
-            return_value=host_ram_usage_mb * 1024)
-
-        instance_uuid = 'INSTANCE_0'
-        instance = model.get_instance_by_uuid(instance_uuid)
-        self.strategy.add_migration(instance, node_0, node_1)
-
-        instance_util = self.strategy.get_instance_utilization(instance)
-
-        # Ensure that we take into account planned migrations when
-        # determining node utilization
-        exp_node_0_cpu_usage = (
-            cpu_usage * node_0.vcpus) / 100 - instance_util['cpu']
-        exp_node_1_cpu_usage = (
-            cpu_usage * node_1.vcpus) / 100 + instance_util['cpu']
-
-        exp_node_0_ram_usage = host_ram_usage_mb - instance.memory
-        exp_node_1_ram_usage = host_ram_usage_mb + instance.memory
-
-        exp_node_0_util = dict(
-            cpu=exp_node_0_cpu_usage,
-            ram=exp_node_0_ram_usage,
-            disk=0)
-        exp_node_1_util = dict(
-            cpu=exp_node_1_cpu_usage,
-            ram=exp_node_1_ram_usage,
-            disk=25)
-
-        self.assertEqual(
-            exp_node_0_util,
-            self.strategy.get_node_utilization(node_0))
-        self.assertEqual(
-            exp_node_1_util,
-            self.strategy.get_node_utilization(node_1))
-
    def test_get_node_capacity(self):
        model = self.fake_c_cluster.generate_scenario_1()
        self.m_c_model.return_value = model
@@ -182,8 +113,7 @@ class TestVMWorkloadConsolidation(TestBaseStrategy):
        expected_cru = {'cpu': 0.05, 'disk': 0.05, 'ram': 0.0234375}
        self.assertEqual(expected_cru, cru)

-    def _test_add_migration(self, instance_state, expect_migration=True,
-                            expected_migration_type="live"):
+    def test_add_migration_with_active_state(self):
        model = self.fake_c_cluster.generate_scenario_1()
        self.m_c_model.return_value = model
        self.fake_metrics.model = model
@@ -191,36 +121,38 @@ class TestVMWorkloadConsolidation(TestBaseStrategy):
        n2 = model.get_node_by_uuid('Node_1')
        instance_uuid = 'INSTANCE_0'
        instance = model.get_instance_by_uuid(instance_uuid)
-        instance.state = instance_state
        self.strategy.add_migration(instance, n1, n2)
-
-        if expect_migration:
-            self.assertEqual(1, len(self.strategy.solution.actions))
-
-            expected = {'action_type': 'migrate',
-                        'input_parameters': {
-                            'destination_node': n2.hostname,
-                            'source_node': n1.hostname,
-                            'migration_type': expected_migration_type,
-                            'resource_id': instance.uuid,
-                            'resource_name': instance.name}}
-            self.assertEqual(expected, self.strategy.solution.actions[0])
-        else:
-            self.assertEqual(0, len(self.strategy.solution.actions))
-
-    def test_add_migration_with_active_state(self):
-        self._test_add_migration(element.InstanceState.ACTIVE.value)
+        self.assertEqual(1, len(self.strategy.solution.actions))
+        expected = {'action_type': 'migrate',
+                    'input_parameters': {'destination_node': n2.hostname,
+                                         'source_node': n1.hostname,
+                                         'migration_type': 'live',
+                                         'resource_id': instance.uuid,
+                                         'resource_name': instance.name}}
+        self.assertEqual(expected, self.strategy.solution.actions[0])

    def test_add_migration_with_paused_state(self):
-        self._test_add_migration(element.InstanceState.PAUSED.value)
+        model = self.fake_c_cluster.generate_scenario_1()
+        self.m_c_model.return_value = model
+        self.fake_metrics.model = model
+        n1 = model.get_node_by_uuid('Node_0')
+        n2 = model.get_node_by_uuid('Node_1')
+        instance_uuid = 'INSTANCE_0'
+        instance = model.get_instance_by_uuid(instance_uuid)
+        setattr(instance, 'state', element.InstanceState.ERROR.value)
+        self.strategy.add_migration(instance, n1, n2)
+        self.assertEqual(0, len(self.strategy.solution.actions))

-    def test_add_migration_with_error_state(self):
-        self._test_add_migration(element.InstanceState.ERROR.value,
-                                 expect_migration=False)
-
-    def test_add_migration_with_stopped_state(self):
-        self._test_add_migration(element.InstanceState.STOPPED.value,
-                                 expected_migration_type="cold")
+        setattr(instance, 'state', element.InstanceState.PAUSED.value)
+        self.strategy.add_migration(instance, n1, n2)
+        self.assertEqual(1, len(self.strategy.solution.actions))
+        expected = {'action_type': 'migrate',
+                    'input_parameters': {'destination_node': n2.hostname,
+                                         'source_node': n1.hostname,
+                                         'migration_type': 'live',
+                                         'resource_id': instance.uuid,
+                                         'resource_name': instance.name}}
+        self.assertEqual(expected, self.strategy.solution.actions[0])

    def test_is_overloaded(self):
        model = self.fake_c_cluster.generate_scenario_1()
--- a/watcher/tests/decision_engine/strategy/strategies/test_zone_migration.py
+++ b/watcher/tests/decision_engine/strategy/strategies/test_zone_migration.py
@@ -144,7 +144,7 @@ class TestZoneMigration(TestBaseStrategy):

    @staticmethod
    def fake_volume(**kwargs):
-        volume = mock.MagicMock(spec=cinderclient.v3.volumes.Volume)
+        volume = mock.MagicMock(spec=cinderclient.v2.volumes.Volume)
        volume.id = kwargs.get('id', utils.generate_uuid())
        volume.name = kwargs.get('name', 'fake_name')
        volume.status = kwargs.get('status', 'available')
--- a/watcher/tests/objects/test_objects.py
+++ b/watcher/tests/objects/test_objects.py
@@ -531,7 +531,6 @@ class TestRegistry(test_base.TestCase):

    @mock.patch('watcher.objects.base.objects')
    def test_hook_chooses_newer_properly(self, mock_objects):
-        mock_objects.MyObj.VERSION = MyObj.VERSION
        reg = base.WatcherObjectRegistry()
        reg.registration_hook(MyObj, 0)

@@ -548,7 +547,6 @@ class TestRegistry(test_base.TestCase):

    @mock.patch('watcher.objects.base.objects')
    def test_hook_keeps_newer_properly(self, mock_objects):
-        mock_objects.MyObj.VERSION = MyObj.VERSION
        reg = base.WatcherObjectRegistry()
        reg.registration_hook(MyObj, 0)
Author	SHA1	Message	Date
Thierry Carrez	ab6cd112d7	Move queue declaration to project level This moves the watcher queue declaration from the pipeline level (where it is no longer valid) to the project level. https: //lists.openstack.org/pipermail/openstack-discuss/2022-May/028603.html Change-Id: I06923abb00f7eecd59587f44cd1f6a069e88a9fc (cherry picked from commit `6003322711`)	2023-08-19 07:30:15 +00:00
Zuul	d60e2a96e4	Merge "Update .gitreview for stable/wallaby" into stable/wallaby	2021-07-01 13:32:11 +00:00
OpenStack Release Bot	adf4725f8c	Update TOX_CONSTRAINTS_FILE for stable/wallaby Update the URL to the upper-constraints file to point to the redirect rule on releases.openstack.org so that anyone working on this branch will switch to the correct upper-constraints list automatically when the requirements repository branches. Until the requirements repository has as stable/wallaby branch, tests will continue to use the upper-constraints list on master. Change-Id: I5986087281694580acc3c19feed461b5949f7001	2021-07-01 11:44:53 +00:00
OpenStack Release Bot	537823b216	Update .gitreview for stable/wallaby Change-Id: Ic8aa9518d5ccc65d43444d42c584db476cd79429	2021-07-01 11:44:34 +00:00
ericxiett	281455a08a	Replace deprecated with_lockmode with with_for_update The Query.with_lockmode() method is deprecated since version 0.9.0 and will be removed in a future release. [1] This patch replaces it with Query.with_for_update(). The 'faultstring' was been modified to 'Exactly 5 or 6 columns has to be specified for iterator expression', so adds one space between "iterator" and "expression" for 'expected_error_msg'. Also use upper-constraints in doc build to avoid issues in pdf build. [1] https://docs.sqlalchemy.org/en/13/orm/query.html#sqlalchemy.orm.query.Query.with_lockmode Closes-Bug: #1933226 Change-Id: I0ad514da647bb08790259fd27e56a41f6dbbbaa0 (cherry picked from commit `9ca44fa3ab`)	2021-07-01 09:11:58 +00:00