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| − | This page describes the "why" and "how" I'd like to add Alarms
| + | Content moved to: http://wiki.openstack.org/EfficientMetering/GrizzlySummit/BeyondMetering |
| − | (and general AWS::[[CloudWatch]] functionality) to Ceilometer.
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| − | == Purpose ==
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| − | The purpose of Alarms is to notify a user when a meter matches a certain criteria.
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| − | == Example use cases ==
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| − | * "Tell me when the maximum disk utilization exceeds 90%"
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| − | * "Tell me when the average CPU utilization exceeds 80% over 120 seconds"
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| − | * "Tell me when my web app is becoming unresponsive" (loadbalancer latency meter)
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| − | * "Tell me when my httpd daemon dies" (custom user script that checks daemon health)
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| − | == How can you use Alarms ==
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| − | Create an alarm
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| − | <pre><nowiki>
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| − | {
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| − | 'period': '300',
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| − | 'eval_periods': '2',
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| − | 'meter': 'CPUUtilization',
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| − | 'function': 'average',
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| − | 'operator': 'gt',
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| − | 'threshold': '50'
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| − | 'resource_id': 'inst-002',
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| − | 'source': 'OS/compute',
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| − | 'alarm_actions': ['rpc/my_notify_topic', 'http://bla.com/bla'],
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| − | 'ok_actions': ['rpc/my_notify_topic']
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| − | }
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| − | </nowiki></pre>
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| − | This will check the "CPUUtilization" meter events every 300sec
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| − | and if the average CPUUtilization was > 50% (for inst-002) for both of the
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| − | last 2 300sec periods then it will send an rpc notification on the "my_notify_topic" topic
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| − | and post the alarm details to http://bla.com/bla.
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| − | Then when the alarm goes below this level it will do the "ok_actions".
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Revision as of 03:57, 8 November 2012
Content moved to: http://wiki.openstack.org/EfficientMetering/GrizzlySummit/BeyondMetering
