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<p>Lingxian, <br>
</p>
<p>Thanks for "bumping" my request and keeping it alive. The reason
I need an answer: I am updating courseware to Stein that includes
autoscaling based on CPU and disk I/O rates. Looks like I am
"cutting edge" :)<br>
</p>
<p>I don't think the problem is in the Gnocchi camp, but rather
Ceilometer. To store rates of measures in z, the following is
needed:</p>
<ul>
<li>A <i>metric</i>. Raw measures are sent to the metric.<br>
</li>
<li>An <i>archive policy</i>. The metric has an archive policy.<br>
</li>
<li>The archive policy includes one or more <i>rate aggregates</i></li>
</ul>
My cloud has archive policies with rate aggregates, but the question
is about the first bullet: <b>How can I configure Ceilometer so
that it creates the corresponding metrics and sends measures to
them. </b>In other words, how is Ceilometer's output connected to
my archive policy. From my experience, just adding the archive
policy to Ceilometer's publishers is not sufficient. <br>
<p>Ceilometer's source code includes <i>.../publisher/data/gnocchi_resources.yaml</i>,
which might well be the place where this can be configured. I am
not sure how to do it though, and this file is not documented. I
can read the source, but my developer skills are insufficient for
understanding how everything fits together.<br>
</p>
<p>Bernd<br>
</p>
<div class="moz-cite-prefix">On 8/1/2019 9:01 AM, Lingxian Kong
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CALjNAZ0VeyeueAPR2PbxAtpkaopFJWgWJGoSrFc_ZSnoqjJvEw@mail.gmail.com">
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<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif">Hi Bernd,</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif"><br>
</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif">There were a
lot of people asked the same question before, unfortunately, I
don't know the answer either(we are still using an old version
of Ceilometer). The original cpu_util support has been removed
from Ceilometer in favor of Gnocchi, but AFAIK, there is no
doc in Gnocchi mentioned how to achieve the same thing and no
clear answer from the Gnocchi maintainers.</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif"><br>
</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif">It'd be much
appreciated if you could find the answer in the end, or there
will be someone who has the already solved the issue.</div>
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<div><font
face="monospace,
monospace"
color="#666666">Best
regards,<br>
Lingxian Kong</font></div>
<div><font
face="monospace,
monospace"
color="#666666">Catalyst
Cloud</font></div>
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<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Wed, Jul 31, 2019 at 1:28
PM Bernd Bausch <<a href="mailto:berndbausch@gmail.com"
moz-do-not-send="true">berndbausch@gmail.com</a>> wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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<p>The message at the end of this email is some three months
old. I have the same problem. The question is: <b>How to
use the new rate metrics in Gnocchi. </b>I am using a
Stein Devstack for my tests.<b><br>
</b></p>
<p>For example, I need the CPU rate, formerly named <i>cpu_util</i>.
I created a new archive policy that uses <i>rate:mean</i>
aggregation and has a 1 minute granularity:</p>
<p><tt>$ gnocchi archive-policy show ceilometer-medium-rate</tt><tt><br>
</tt><tt>+---------------------+------------------------------------------------------------------+</tt><tt><br>
</tt><tt>| Field |
Value
|</tt><tt><br>
</tt><tt>+---------------------+------------------------------------------------------------------+</tt><tt><br>
</tt><tt>| aggregation_methods | rate:mean,
mean |</tt><tt><br>
</tt><tt>| back_window |
0
|</tt><tt><br>
</tt><tt>| definition | - points: 10080,
granularity: 0:01:00, timespan: 7 days, 0:00:00 |</tt><tt><br>
</tt><tt>| name |
ceilometer-medium-rate
|</tt><tt><br>
</tt><tt>+---------------------+------------------------------------------------------------------+</tt><br>
</p>
<p>I added the new policy to the publishers in <i>pipeline.yaml</i>:</p>
<p><tt>$ tail -n5 /etc/ceilometer/pipeline.yaml</tt><tt><br>
</tt><tt>sinks:</tt><tt><br>
</tt><tt> - name: meter_sink</tt><tt><br>
</tt><tt> publishers:</tt><tt><br>
</tt><tt> -
gnocchi://?archive_policy=medium&filter_project=gnocchi_swift</tt><tt><br>
</tt><tt> <b>-
gnocchi://?archive_policy=ceilometer-medium-rate&filter_project=gnocchi_swift</b></tt><br>
</p>
<p>After restarting all of Ceilometer, my hope was that the
CPU rate would magically appear in the metric list. But
no: All metrics are linked to archive policy <i>medium</i>,
and looking at the details of an instance, I don't detect
anything rate-related:</p>
<p><tt>$ gnocchi resource show
ae3659d6-8998-44ae-a494-5248adbebe11</tt><tt><br>
</tt><tt>+-----------------------+---------------------------------------------------------------------+</tt><tt><br>
</tt><tt>| Field |
Value
|</tt><tt><br>
</tt><tt>+-----------------------+---------------------------------------------------------------------+</tt><tt><br>
</tt><tt>...</tt><tt><br>
</tt><tt>| metrics |
compute.instance.booting.time:
76fac1f5-962e-4ff2-8790-1f497c99c17d |</tt><tt><br>
</tt><tt>| | cpu:
af930d9a-a218-4230-b729-fee7e3796944
|</tt><tt><br>
</tt><tt>| | disk.ephemeral.size:
0e838da3-f78f-46bf-aefb-aeddf5ff3a80 |</tt><tt><br>
</tt><tt>| | disk.root.size:
5b971bbf-e0de-4e23-ba50-a4a9bf7dfe6e |</tt><tt><br>
</tt><tt>| | memory.resident:
09efd98d-c848-4379-ad89-f46ec526c183 |</tt><tt><br>
</tt><tt>| | <a
href="http://memory.swap.in" target="_blank"
moz-do-not-send="true">memory.swap.in</a>:
1bb4bb3c-e40a-4810-997a-295b2fe2d5eb |</tt><tt><br>
</tt><tt>| | memory.swap.out:
4d012697-1d89-4794-af29-61c01c925bb4 |</tt><tt><br>
</tt><tt>| | memory.usage:
93eab625-0def-4780-9310-eceff46aab7b |</tt><tt><br>
</tt><tt>| | memory:
ea8f2152-09bd-4aac-bea5-fa8d4e72bbb1
|</tt><tt><br>
</tt><tt>| | vcpus:
e1c5acaf-1b10-4d34-98b5-3ad16de57a98
|</tt><tt><br>
</tt><tt>| original_resource_id |
ae3659d6-8998-44ae-a494-5248adbebe11
|</tt><tt><br>
</tt><tt>...</tt></p>
<p><tt>| type |
instance
|</tt><tt><br>
</tt><tt>| user_id |
a9c935f52e5540fc9befae7f91b4b3ae
|</tt><tt><br>
</tt><tt>+-----------------------+---------------------------------------------------------------------+</tt></p>
<p>Obviously, I am missing something. Where is the missing
link? What do I have to do to get CPU usage rates? Do I
have to create metrics? Do<i> </i>I have to ask
Ceilometer to create metrics? How? <br>
</p>
<p>Right now, no instructions seem to exist at all. If that
is correct, I would be happy to write documentation once I
understand how it works. </p>
<p>Thanks a lot.</p>
<p>Bernd<br>
</p>
<div class="gmail-m_116874100483014509moz-cite-prefix">On
5/10/2019 3:49 PM, <a
class="gmail-m_116874100483014509moz-txt-link-abbreviated"
href="mailto:info@dantalion.nl" target="_blank"
moz-do-not-send="true">info@dantalion.nl</a> wrote:<br>
</div>
<blockquote type="cite">
<pre class="gmail-m_116874100483014509moz-quote-pre">Hello,
I am working on Watcher and we are currently changing how metrics are
retrieved from different datasources such as Monasca or Gnocchi. Because
of this major overhaul I would like to validate that everything is
working correctly.
Almost all of the optimization strategies in Watcher require the cpu
utilization of an instance as metric but with newer versions of
Ceilometer this has become unavailable.
On IRC I received the information that Gnocchi could be used to
configure an aggregate and this aggregate would then report cpu
utilization, however, I have been unable to find documentation on how to
achieve this.
I was also notified that cpu_util is something that could be computed
from other metrics. When reading
<a class="gmail-m_116874100483014509moz-txt-link-freetext" href="https://docs.openstack.org/ceilometer/rocky/admin/telemetry-measurements.html#openstack-compute" target="_blank" moz-do-not-send="true">https://docs.openstack.org/ceilometer/rocky/admin/telemetry-measurements.html#openstack-compute</a>
the documentation seems to agree on this as it states that cpu_util is
measured by using a 'rate of change' transformer. But I have not been
able to find how this can be computed.
I was hoping someone could spare the time to provide documentation or
information on how this currently is best achieved.
Kind Regards,
Corne Lukken (Dantali0n)
</pre>
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