openstack/watcher
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Merge "Complete schema of workload_stabilization strategy"

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Zuul 2018-03-06 01:17:37 +00:00 committed by Gerrit Code Review
commit 9af32bce5b
1 changed files with 44 additions and 2 deletions
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46
watcher/decision_engine/strategy/strategies/workload_stabilization.py
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@ -23,6 +23,8 @@ This is workload stabilization strategy based on standard deviation
algorithm. The goal is to determine if there is an overload in a cluster
and respond to it by migrating VMs to stabilize the cluster.
This strategy has been tested in a small (32 nodes) cluster.
It assumes that live migrations are possible in your cluster.
"""
@ -104,19 +106,47 @@ class WorkloadStabilization(base.WorkloadStabilizationBaseStrategy):
"metrics": {
"description": "Metrics used as rates of cluster loads.",
"type": "array",
"default": ["cpu_util", "memory.resident"]
"items": {
"type": "string",
"enum": ["cpu_util", "memory.resident"]
},
"default": ["cpu_util"]
},
"thresholds": {
"description": "Dict where key is a metric and value "
"is a trigger value.",
"type": "object",
"default": {"cpu_util": 0.2, "memory.resident": 0.2}
"properties": {
"cpu_util": {
"type": "number",
"minimum": 0,
"maximum": 1
},
"memory.resident": {
"type": "number",
"minimum": 0,
"maximum": 1
}
},
"default": {"cpu_util": 0.1, "memory.resident": 0.1}
},
"weights": {
"description": "These weights used to calculate "
"common standard deviation. Name of weight"
" contains meter name and _weight suffix.",
"type": "object",
"properties": {
"cpu_util_weight": {
"type": "number",
"minimum": 0,
"maximum": 1
},
"memory.resident_weight": {
"type": "number",
"minimum": 0,
"maximum": 1
}
},
"default": {"cpu_util_weight": 1.0,
"memory.resident_weight": 1.0}
},
@ -141,6 +171,7 @@ class WorkloadStabilization(base.WorkloadStabilizationBaseStrategy):
"retry_count": {
"description": "Count of random returned hosts",
"type": "number",
"minimum": 1,
"default": 1
},
"periods": {
@ -152,12 +183,23 @@ class WorkloadStabilization(base.WorkloadStabilizationBaseStrategy):
"uses only the last period of all received"
" ones.",
"type": "object",
"properties": {
"instance": {
"type": "integer",
"minimum": 0
},
"node": {
"type": "integer",
"minimum": 0
},
},
"default": {"instance": 720, "node": 600}
},
"granularity": {
"description": "The time between two measures in an "
"aggregated timeseries of a metric.",
"type": "number",
"minimum": 0,
"default": 300
},
}