filter exclude instances during migration

Change-Id: Ib5e0d285de0f25515702890778aca5e6417befaf
Implements:blueprint compute-cdm-include-all-instances

watcher/decision_engine/model/model_root.py

@@ -16,6 +16,7 @@
 Openstack implementation of the cluster graph.
 """
 
+import ast
 from lxml import etree
 import networkx as nx
 from oslo_concurrency import lockutils
@@ -225,6 +226,8 @@ class ModelRoot(nx.DiGraph, base.Model):
 
         for inst in root.findall('.//Instance'):
             instance = element.Instance(**inst.attrib)
+            instance.watcher_exclude = ast.literal_eval(
+                inst.attrib["watcher_exclude"])
             model.add_instance(instance)
 
             parent = inst.getparent()

watcher/decision_engine/strategy/strategies/basic_consolidation.py

@@ -372,6 +372,11 @@ class BasicConsolidation(base.ServerConsolidationBaseStrategy):
                                  sorted_score):
         number_migrations = 0
         for mig_instance, __ in sorted_instances:
+            # skip exclude instance when migrating
+            if mig_instance.watcher_exclude:
+                LOG.debug("Instance is excluded by scope, "
+                          "skipped: %s", mig_instance.uuid)
+                continue
             for node_uuid, __ in sorted_score:
                 mig_source_node = self.compute_model.get_node_by_uuid(
                     node_to_release)

watcher/decision_engine/strategy/strategies/outlet_temp_control.py

@@ -211,6 +211,11 @@ class OutletTempControl(base.ThermalOptimizationBaseStrategy):
                 mig_source_node)
             for instance in instances_of_src:
                 try:
+                    # NOTE: skip exclude instance when migrating
+                    if instance.watcher_exclude:
+                        LOG.debug("Instance is excluded by scope, "
+                                  "skipped: %s", instance.uuid)
+                        continue
                     # select the first active instance to migrate
                     if (instance.state !=
                             element.InstanceState.ACTIVE.value):

watcher/decision_engine/strategy/strategies/uniform_airflow.py

@@ -240,6 +240,11 @@ class UniformAirflow(base.BaseStrategy):
                 else:
                     # migrate the first active instance
                     for instance in source_instances:
+                        # NOTE: skip exclude instance when migrating
+                        if instance.watcher_exclude:
+                            LOG.debug("Instance is excluded by scope, "
+                                      "skipped: %s", instance.uuid)
+                            continue
                         if (instance.state !=
                                 element.InstanceState.ACTIVE.value):
                             LOG.info(

watcher/decision_engine/strategy/strategies/vm_workload_consolidation.py

@@ -504,6 +504,11 @@ class VMWorkloadConsolidation(base.ServerConsolidationBaseStrategy):
                         key=lambda x: self.get_instance_utilization(
                             x)['cpu']
                 ):
+                    # skip exclude instance when migrating
+                    if instance.watcher_exclude:
+                        LOG.debug("Instance is excluded by scope, "
+                                  "skipped: %s", instance.uuid)
+                        continue
                     for destination_node in reversed(sorted_nodes):
                         if self.instance_fits(
                                 instance, destination_node, cc):
@@ -536,6 +541,11 @@ class VMWorkloadConsolidation(base.ServerConsolidationBaseStrategy):
                 self.compute_model.get_node_instances(node),
                 key=lambda x: self.get_instance_utilization(x)['cpu'])
             for instance in reversed(instances):
+                # skip exclude instance when migrating
+                if instance.watcher_exclude:
+                    LOG.debug("Instance is excluded by scope, "
+                              "skipped: %s", instance.uuid)
+                    continue
                 dsc = len(sorted_nodes) - 1
                 for destination_node in reversed(sorted_nodes):
                     if asc >= dsc:

watcher/decision_engine/strategy/strategies/workload_balance.py

@@ -208,6 +208,11 @@ class WorkloadBalance(base.WorkloadStabilizationBaseStrategy):
                 instance_id = None
                 for instance in source_instances:
                     try:
+                        # NOTE: skip exclude instance when migrating
+                        if instance.watcher_exclude:
+                            LOG.debug("Instance is excluded by scope, "
+                                      "skipped: %s", instance.uuid)
+                            continue
                         # select the first active VM to migrate
                         if (instance.state !=
                                 element.InstanceState.ACTIVE.value):

watcher/decision_engine/strategy/strategies/workload_stabilization.py

@@ -347,10 +347,15 @@ class WorkloadStabilization(base.WorkloadStabilizationBaseStrategy):
             c_nodes.remove(src_host)
             node_list = yield_nodes(c_nodes)
             for instance in self.compute_model.get_node_instances(src_node):
-                min_sd_case = {'value': current_weighted_sd}
+                # NOTE: skip exclude instance when migrating
+                if instance.watcher_exclude:
+                    LOG.debug("Instance is excluded by scope, "
+                              "skipped: %s", instance.uuid)
+                    continue
                 if instance.state not in [element.InstanceState.ACTIVE.value,
                                           element.InstanceState.PAUSED.value]:
                     continue
+                min_sd_case = {'value': current_weighted_sd}
                 for dst_host in next(node_list):
                     dst_node = self.compute_model.get_node_by_uuid(dst_host)
                     sd_case = self.calculate_migration_case(