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<div>Hi</div>
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<div>I have a requirement of monitoring VMs, if a VM's meter <span style="font-size: 10pt;">like cpu_util become too high, then system generate an alarm for this VM with </span><span style="font-size: 10pt;">meter information.</span></div>
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<div><span style="font-size: 10pt;">I have tested alarm function of ceilometer, b</span>elow are commands I used to create alarm object with meter and resource id or not:</div>
<div>ceilometer alarm-threshold-create --name alarm1 --meter-name cpu_util --period 60 --evaluation-periods 1 --statistic avg --comparison-operator gt --threshold 1 -q resource_id=757dadaa-0707-4fad-808d-81edc11438aa</div>
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<div>ceilometer alarm-threshold-create --name alarm1 --meter-name cpu_util --period 60 --evaluation-periods 1 --statistic avg --comparison-operator gt --threshold 1</div>
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<div>I have the following question:</div>
<div><span style="font-size: 10pt;">If </span><span style="font-size: 10pt;">I have to define alarm object for every VM and every meter? </span></div>
<div><span style="font-size: 10pt;">Take 100 VM and 2 meter cpu_util, memory_util as an example, I will have to define 100*2 alarm objects for them. </span></div>
<div><span style="font-size: 10pt;">I think i</span><span style="font-size: 10pt;">f I just define alarm object with meter not but VM(resource_id), then alarm evaluator will count all VM's meter.</span></div>
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<div>Another question produced by question above: I know that <span style="font-size: 10pt;">alarm evaluator will process alarm object one by one, so too many alarm object may result in performance problems too.</span></div>
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<div><span style="font-size: 10pt;">I am not a ceilometer programmer and I apologize if I am missing something very obvious.</span></div>
<div>Can you give me some help to make me clear about them and how to implement my requirement?</div>
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<div>Thanks</div>
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