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Hi,ZhiQiang,<br>
I have the same confusion, coincidentally, for some metrics, samples
can be generated from both motification-agent and central-agent(or
compute-agent), such as image, floatingip, image.size..., these
samples from notification can effect the statistics of the meter,
further, this may broken alarm-evaluation base on the meters.<br>
<br>
So,is it an issue?<br>
<br>
For your question, think about using combination alarm or specifying
exclude_outliers in alarm.rule, just guess :)<br>
<div class="moz-cite-prefix">于 2014/4/14 20:01, ZhiQiang Fan 写道:<br>
</div>
<blockquote
cite="mid:CA+TtxkvzOSQ5tcrLufiGSXbbCKOCEFG89JQ+JuO+8eZZFQUd8g@mail.gmail.com"
type="cite">
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<div>
<div><span style="font-family:verdana,sans-serif">Hi,
operators,<br>
<br>
</span></div>
<span style="font-family:verdana,sans-serif">I have an
environment running openstack havana which enables
ceilometer service, and I set notify_on_state_change =
vm_and_task_state in /etc/nova/nova.conf. So there are
notifications being sent when instances state and task
status changed, the problem that the end users may create
alarm based on instance count, which mea<code>ns </code>statistics
on instance meter will be used, which leading to an
incorrect state of alarm, because there may be 5 vm but has
10 instances sample in 1 periods.<br>
</span>
<span style="font-family:verdana,sans-serif"><br>
</span></div>
<div><span style="font-family:verdana,sans-serif">I think the
cpu_util can replace the instance, but what about the vm has
multiple cpu?<br>
<br>
</span></div>
<div>
<span style="font-family:verdana,sans-serif">So, it is really
confused me how to check vm count through statistics api<br>
</span>
<span style="font-family:verdana,sans-serif"><br>
</span></div>
<div><span style="font-family:verdana,sans-serif">Can anyone
share your experience? Or is there some material can be
read?<br>
<br>
</span></div>
<div><span style="font-family:verdana,sans-serif">Thanks!<br>
<br>
<br>
</span></div>
<div><span style="font-family:verdana,sans-serif">(sorry, the
previous mail seems not display correctly, so I repost it in
reply.)<br>
</span></div>
</div>
<br>
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