openstack/watcher
Code Issues Proposed changes

change ram util metric

Browse Source 
Metric 'memory.usage' depends on balloon driver,
and shows the memory usage inside guest-os,
while 'memory.resident' represents volume of RAM
used by the instance on the physical machine
So, it is more reasonable to use 'memory.resident'
when calculating node utilization
by gathering instances utilization of the node.

Change-Id: I12dff5176bcf6cb103aa44cafd54f9ecd7170864
This commit is contained in:
suzhengwei 2017-07-14 14:30:48 +08:00
parent 728acc091b
commit d2f70f9d6f
4 changed files with 15 additions and 7 deletions
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2
doc/source/strategies/vm_workload_consolidation.rst
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@ -32,7 +32,7 @@ the strategy if available:
============================ ============ ======= =======
metric service name plugins comment
============================ ============ ======= =======
``memory.usage`` ceilometer_ none
``memory.resident`` ceilometer_ none
``cpu_util`` ceilometer_ none
============================ ============ ======= =======

8
releasenotes/notes/change-ram-util-metric-4a3e6984b9dd968d.yaml Normal file
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@ -0,0 +1,8 @@
---
features:
- Enhancement of vm_workload_consolidation strategy
by using 'memory.resident' metric in place of
'memory.usage', as memory.usage shows the memory
usage inside guest-os and memory.resident
represents volume of RAM used by instance
on host machine.

6
watcher/decision_engine/strategy/strategies/vm_workload_consolidation.py Executable file → Normal file
View File

@ -77,12 +77,12 @@ class VMWorkloadConsolidation(base.ServerConsolidationBaseStrategy):
METRIC_NAMES = dict(
ceilometer=dict(
cpu_util_metric='cpu_util',
ram_util_metric='memory.usage',
ram_util_metric='memory.resident',
ram_alloc_metric='memory',
disk_alloc_metric='disk.root.size'),
gnocchi=dict(
cpu_util_metric='cpu_util',
ram_util_metric='memory.usage',
ram_util_metric='memory.resident',
ram_alloc_metric='memory',
disk_alloc_metric='disk.root.size'),
)
@ -361,7 +361,7 @@ class VMWorkloadConsolidation(base.ServerConsolidationBaseStrategy):
if not instance_ram_util:
instance_ram_util = instance.memory
LOG.warning('No values returned by %s for memory.usage, '
LOG.warning('No values returned by %s for memory.resident, '
'use instance flavor ram value', instance.uuid)
if not instance_disk_util:

4
watcher/tests/decision_engine/model/faker_cluster_and_metrics.py
View File

@ -87,7 +87,7 @@ class FakeCeilometerMetrics(object):
return self.get_node_cpu_util(resource_id)
elif meter_name == "cpu_util":
return self.get_instance_cpu_util(resource_id)
elif meter_name == "memory.usage":
elif meter_name == "memory.resident":
return self.get_instance_ram_util(resource_id)
elif meter_name == "disk.root.size":
return self.get_instance_disk_root_size(resource_id)
@ -169,7 +169,7 @@ class FakeGnocchiMetrics(object):
return self.get_node_cpu_util(resource_id)
elif metric == "cpu_util":
return self.get_instance_cpu_util(resource_id)
elif metric == "memory.usage":
elif metric == "memory.resident":
return self.get_instance_ram_util(resource_id)
elif metric == "disk.root.size":
return self.get_instance_disk_root_size(resource_id)