In the process of creating an instance, Nova will emit an
instance.update notification with 'building' state.
This will cause a KeyError exception because this instance
isn't in Watcher datamodel.
So we should ignore the notification instance.update with
'building' state.
Closes-Bug: #1832154
Change-Id: I950eec50d2cee38bd22c47a70ae6f88bbf049080
Now there are some errors when running apidoc,
actually we don't need apidoc, so remove it.
Closes-Bug: #1831515
Change-Id: I3b91a2c05ed62ae7bbd30a29e9db51d0e021410f
The get_compute_node_by_hostname method is given a
compute service hostname and then does two queries to
find the matching hypervisor (compute node) with details:
1. List hypervisors with details and find the one that
matches the given compute service hostname.
2. Using that node, search for hypervisors with the
matching hypervisor_hostname.
There are two issues here:
1. The first query is inefficient in that it has to list
all hypervisors in the deployment to try and match the
one with the compute service hostname client side.
2. The second query is a fuzzy match on the server side [1]
so even though we have matched on the node we want,
get_compute_node_by_name can still return more than
one hypervisor which will result in the helper method
raising ComputeNodeNotFound. Consider having compute
hosts with names compute1, compute10, compute11, compute100,
and so on. The fuzzy match on compute1 would return all of
those hypervisors.
For non-ironic nodes in nova, the compute service host and
hypervisor should be 1:1, meaning the hypervisor.service['host']
should be the same as hypervisor.hypervisor_hostname. Knowing
this, we can simplify the code to search just on the given
compute service hostname and if we get more than one result, it
is because of the fuzzy match and we can then do our client-side
filtering on the compute service hostname.
[1] https://github.com/openstack/nova/blob/d4f58f5eb/nova/db/sqlalchemy/api.py#L676
Change-Id: I84f387982f665d7cc11bffe8ec390cc7e7ed5278
The nova CDM builder code and notification handling
code had some inefficiencies when it came to looking
up a hypevisor to get details. The general pattern
used before was:
1. get the minimal hypervisor information by hypervisor_hostname
2. make another query to get the hypervisor details by id
In the notifications case, it was actually three calls because
the first is listing hyprvisors to filter client-side by service
host.
This change collapses 1 and 2 above into a single API call
to get the hypervisor by hypervisor_hostname with details
which will include the service (compute) host information
which is what get_compute_node_by_id() was being used for.
Now that nothing is using get_compute_node_by_id it is removed.
There is more work we could do in get_compute_node_by_hostname
if the compute API allowed filtering hypervisors by service
host so a TODO is left for that.
One final thing: the TODO in get_compute_node_by_hostname about
there being more than one hypervisor per compute service host
for vmware vcenter is not accurate - nova's vcenter driver
hasn't supported a host:node 1:M topology like that since the
Liberty release [1]. The only in-tree driver in nova that supports
1:M is the ironic baremetal driver, so the comment is updated.
[1] Ifc17c5049e3ed29c8dd130339207907b00433960
Depends-On: https://review.opendev.org/661785/
Change-Id: I5e0e88d7b2dd1a69117ab03e0e66851c687606da
Some of the methods for retrieving data about instances was placed
at the bottom of nova_helper instead of being close to the other
instance based methods.
Change-Id: I68475883529610e514aa82f1881105ab0cf24ec3
This does two things:
1. Rather than make an API call per server on the host,
get all of the servers in a single API call by
filtering on the host. The os-hypervisors API results
to use make this require a bit of refactoring since
get_compute_node_by_name does not have the service
entry in it and get_compute_node_by_id does not have the
servers entry in it. A TODO is added to clean that up
with a single call to os-hypervisors once we have the
support in python-novaclient.
2. Pulls get_node_by_uuid() out of the loop.
A test is added for the nova_helper get_instance_list method
since one did not exist before.
The fake compute node mocks in test_nova_cdmc_execute are
also cleaned up since, as noted above, get_compute_node_by_name
and get_compute_node_by_id don't both return all the details.
Change-Id: Ifd9f83c2f399d4c1765b0c520f4d5a62ad0f5fbd
Fix the list of required metrics from a datasource when testing the
existence of this metric in the metric map.
Change-Id: I19b7408a98893bc942c32edb09f1b3798ec8dc79
With change Id34938c7bb8a5ca934d997e52cac3b365414c006
we require nova API version 2.56 or greater so we can
remove the compatibliity check in the
watcher_non_live_migrate_instance method.
The _check_nova_api_version method is left in place
for future compability checks.
Change-Id: I69040fbc13b03d90b9687c0d11104d4a5bae51d3
The [nova_client]/api_version defaults to 2.56 since
change Idd6ebc94f81ad5d65256c80885f2addc1aaeaae1. There
is compatibility code for that change but if 2.56 is
not available watcher_non_live_migrate_instance will
still fail if a destination host is used.
Since 2.56 has been available since the Queens version of
nova it should be reasonable to require at least that
version of nova is running for using Watcher.
This adds code which enforces the minimum version along
with a release note and "watcher-status upgrade check"
check method.
Note that it's kind of weird for watcher to have a config
option like nova_client.api_version since compute API
microversions are per API request even though novaclient
is constructed with the single configured version. It should
really be something the client (watcher in this case) determines
using version discovery and gracefully enables features if
the required nova API version is available, but that's a bigger
change.
Change-Id: Id34938c7bb8a5ca934d997e52cac3b365414c006
MetricNotAvailable and NoDatasourceAvailable allow to differentiate
between having no datasources configured and a required metric being
unavailable from the datasource. Both exceptions have comments so
that the use case is clear.
The input validation of the get_backend method in the datasource
manager is improved.
Additional logging information allows to identify which metric caused
the available datasource to be discarded.
Tests are updated to validate the correct functionality of the new
exceptions.
Change-Id: I512976cce2401dbcd249d42686b78843e111a0e7
Changes to the baseclass for datasources so strategies can be made
compatible with every datasource. Baseclass methods clearly describe
expected values and types for both parameters and for method returns.
query_retry has been added as base method since every current
datasource implements it.
Ceilometer is updated to work with the new baseclass. Several methods
which are not part of the baseclass and are not used by any strategies
are removed. The signature of these methods would have to be changed
to fit with the new base class while it would limit strategies to
only work with Ceilometer.
Gnocchi is updated to work with the new baseclass.
Gnocchi and Ceilometer will perform a transformation for the
host_airflow metric as it retrieves 1/10 th of the actual CFM
Monasca is updated to work with the new baseclass.
FakeMetrics for Gnocchi, Monasca and Ceilometer are updated to work
with the new method signatures of the baseclass.
FakeClusterAndMetrics for Ceilometer and Gnocchi are updated to work
with the new method signatures of the baseclass.
The strategies workload_balance, vm_workload_consolidation,
workload_stabilization, basic_consolidation, noisy_neighbour,
outlet_temp_control and uniform_airflow are updated to work with the
new datasource baseclass.
This patch will break compatibility with plugin strategies and
datasources due to the changes in signatures.
Depends-on: I7aa52a9b82f4aa849f2378d4d1c03453e45c0c78
Change-Id: Ie30ca3dbf01062cbb20d3be5d514ec6b5155cd7c
Implements: blueprint formal-datasource-interface
As a follow up to the recent test improvements for Ceilometer this
patch ensures that the same test pattern is used for Gnocchi and
Monasca as well. This ensures that the mocked functions will be called
with matching signatures.
Change-Id: Ic14a4c087f3961a4b4f373e2e3d792aba71868f6
Override the metric map of each datasource as soon as it is created by
the manager. This override comes from a file whose path is provided by
a setting in config file.
Loading at creation time allows the correct datasource be used when
get_backend is called, this allows loading a datasource whose metric
names get updated outside the watcher's codebase.
The function 'load_metric_map' returns empty-dict in any error case.
Also in case the file is empty where safe_load is unable finds any
yaml documents, it will return None. [1]
Some minor refactoring in the test_manager file for readability and
added tests for file load and metric override.
1 - https://pyyaml.org/wiki/PyYAMLDocumentation
Change-Id: I1df16245f4c7dfd34066f3ab0553cd67154faa58
Implements: blueprint file-based-metric-map
Some users may want to create keystoneclient by specifying the
type of endpoint and region name, so we need to supply the option
for user to choose.
Implements: blueprint support-keystoneclient-option
Change-Id: I49b33a69ec99d2a91568ce27ef89dc80b75e7091
Change I25b4cb0e1b85379ff0c4da9d0c1474380d75ce3a in
Queens refactored the statistic_aggregation method
and renamed the "aggregate" kwarg to "aggregation",
presumably to match the signature of the GnocchiHelper
statistic_aggregation method (the commit message does
not give details) so a base method could be added to
the parent class for all datasource helpers.
As a result, the CeilometerHelper calls to its
statistic_aggregation started passing the new
"granularity" kwarg but failed to match the rename
to the "aggregation" kwarg, which breaks the
CeilometerHelper. This was missed by the unit tests
because the tests were just asserting the erroneous
call that the runtime code made.
This change fixes the kwarg typo and makes the
tests more robust by using the mock spec kwarg
to define a spec for the statistic_aggregation
mock so that it must be called with the correct
parameters defined in the method signature. The
test is refactored to reduce duplicate mocking.
The same test hardening can and should be done
in the gnocchi and monasca helper tests but that
should be done in a separate change.
Co-Authored-By: Matt Riedemann <mriedem.os@gmail.com>
Closes-Bug: #1829542
Change-Id: Idfd099f718873d9056fdc35a97954771c9ae5762
As of change Ic4659d1f18af181203439a8bf1b38805ff34c309 the
nova CDM will not be built until an audit is performed.
Instances and services (compute hosts) can be created and
deleted before an audit is performed which will attempt
to use the notification callback function which relies
on the CDM being built already, and if not results in
an AttributeError.
This change side-steps that issue by checking to see that the
nova CDM exists before trying to call the notification
callback function.
An alternative to this is forcefully create the nova CDM when
notifications are received before an audit which is what happend
before change Ic4659d1f18af181203439a8bf1b38805ff34c309.
Change-Id: I16990afb82019821c443c9df26d3e515e52efa69
Closes-Bug: #1828582
_post_live_migration[1] runs on the source host and calls
post_live_migration_at_destination on the dest host which
emits the instance.live_migration_post_dest.end notification:[2]
But it's not the last notification for the live migration operation.
so we should use instance.live_migration_post.end instead of
instance.live_migration_post_dest.end notification.
[1]daa2ac2287/nova/compute/manager.py (L6907)
[2]daa2ac2287/nova/compute/manager.py (L7035)
Change-Id: Id1e2d98f56d5a95d49e32f98d2910660b9f48ce6
