10:45 a.m.
----- Original Message -----
From: "Thomas Heute" <theute(a)redhat.com>
To: "John Mazzitelli" <mazz(a)redhat.com>
Cc: "Discussions around Hawkular development"
<hawkular-dev(a)lists.jboss.org>
Sent: Friday, 10 February, 2017 7:55:46 AM
Subject: Re: [Hawkular-dev] Collecting PV usage ?
On Fri, Feb 10, 2017 at 1:36 PM, John Mazzitelli < mazz(a)redhat.com > wrote:
No. It is on the list though:
https://github.com/hawkular/hawkular-openshift-agent/issues/110
I don't think they are collected by Heapster today
Heapster collects a bunch of filesystem data, I believe its pulling in all volumes being
used which should include PVs.
It includes the usage and limit for each of the volumes being used.
I honestly don't know where to get these persistent volume stats (or any of
the low level stats) - but I believe its just prometheus data so we should
be able to get it if we just know the correct URLs. But so far we've been
concentrating on app metrics coming from user's pods so we haven't worked on
that yet.
Right. I haven't found evidence of a prometheus endpoint yet.
The main prometheus endpoint for each node should be found here
curl -k -H "Authorization: Bearer $ADMIN_TOKEN" -X GET
https://${NODE_IP}:10250/metrics
The summary endpoint (not Prometheus but json based) that Heapster uses and contains
volume information, can be found here:
reset;curl -k -H "Authorization: Bearer $ADMIN_TOKEN" -X POST -d
'{"num_stats":1}' https://${NODE_IP}:10250/stats/summary
I think you can get the same information from the prometheus endpoint here that you can
from the summary one, but it might be a bit tricky to parse things out. But it could also
be possible that the summary endpoint is including new information.
It doesn't seem straightforward, but an important data to expose. I'm afraid
that it will depend on the storage solution being used (to see the actual
usage)
Thomas
----- Original Message -----
> Mazz,
>
> in your metric collection adventure for HOSA have you met a way to see the
> usage of PVs attached to a pod ?
> User should know (be able to visualize) how much of the PVs are used and
> then be alerted if it reach a certain %.
>
> Thomas
>
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