1:08 a.m.
Hi,
we got the following problem:
we create / start / stop
hole vms /data centers / storage etc
(basically: everything ovirt can handle
via REST-API)
But if you want to know e.g. the status
of a vm (or anything) you need to constantly
poll the API.
This is not what we desire to do, as it
does not scale very well (e.g. polling
100 vms).
Is there a standardized way of pushing information
from the engine?
--
Mit freundlichen Grüßen / Regards
Sven Kieske
Systemadministrator
Mittwald CM Service GmbH & Co. KG
Königsberger Straße 6
32339 Espelkamp
T: +49-5772-293-100
F: +49-5772-293-333
https://www.mittwald.de
Geschäftsführer: Robert Meyer
St.Nr.: 331/5721/1033, USt-IdNr.: DE814773217, HRA 6640, AG Bad Oeynhausen
Komplementärin: Robert Meyer Verwaltungs GmbH, HRB 13260, AG Bad Oeynhausen
1:18 a.m.
New subject: [Users] [Engine-devel] Polling vs Pushing engine events
On 12/17/2013 03:08 AM, Sven Kieske wrote:
Hi,
we got the following problem:
we create / start / stop
hole vms /data centers / storage etc
(basically: everything ovirt can handle
via REST-API)
But if you want to know e.g. the status
of a vm (or anything) you need to constantly
poll the API.
This is not what we desire to do, as it
does not scale very well (e.g. polling
100 vms).
well, you can search events since last event you searched for, only for
the specific type of event you are interested in, then check which vm
its for.
Is there a standardized way of pushing information
from the engine?
well, the notification service which sends emails on these actually
polls for them every minute in order to send the emails.
we are discussing snmptraps here[1]
one of the options this could be implemented with is via log4j getting
all the audit log events, then you could use any log4j appender (db
table, jms queue, etc.)
[1] Bug 1032661 - Add SNMP trap as notification method to to
ovirt-engine-notification
1:24 a.m.
New subject: [Users] [Engine-devel] Polling vs Pushing engine events
Note that you can usually get all the information you want using 1 API
call, which should still scale.
For instance, /ovirt-engine/api/vms will give you a list of all VMs and
their statuses, so you can just run an XPath and get the status of all of
them.
On Tue, Dec 17, 2013 at 10:18 AM, Itamar Heim <iheim(a)redhat.com> wrote:
On 12/17/2013 03:08 AM, Sven Kieske wrote:
> Hi,
>
> we got the following problem:
>
> we create / start / stop
> hole vms /data centers / storage etc
> (basically: everything ovirt can handle
> via REST-API)
>
> But if you want to know e.g. the status
> of a vm (or anything) you need to constantly
> poll the API.
>
> This is not what we desire to do, as it
> does not scale very well (e.g. polling
> 100 vms).
>
well, you can search events since last event you searched for, only for
the specific type of event you are interested in, then check which vm its
for.
> Is there a standardized way of pushing information
> from the engine?
>
>
>
well, the notification service which sends emails on these actually polls
for them every minute in order to send the emails.
we are discussing snmptraps here[1]
one of the options this could be implemented with is via log4j getting all
the audit log events, then you could use any log4j appender (db table, jms
queue, etc.)
[1] Bug 1032661 - Add SNMP trap as notification method to to
ovirt-engine-notification
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Engine-devel mailing list
Engine-devel(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/engine-devel
4:33 a.m.
New subject: [Users] [Engine-devel] Polling vs Pushing engine events
You can use the DWH API to check these things.
The status is sampled and stored for most entities every 1 minute by default (and can be
set to less than that).
Yaniv
----- Original Message -----
From: "Sven Kieske" <S.Kieske(a)mittwald.de>
To: users(a)ovirt.org, engine-devel(a)ovirt.org
Sent: Tuesday, December 17, 2013 10:08:11 AM
Subject: [Engine-devel] Polling vs Pushing engine events
Hi,
we got the following problem:
we create / start / stop
hole vms /data centers / storage etc
(basically: everything ovirt can handle
via REST-API)
But if you want to know e.g. the status
of a vm (or anything) you need to constantly
poll the API.
This is not what we desire to do, as it
does not scale very well (e.g. polling
100 vms).
Is there a standardized way of pushing information
from the engine?
--
Mit freundlichen Grüßen / Regards
Sven Kieske
Systemadministrator
Mittwald CM Service GmbH & Co. KG
Königsberger Straße 6
32339 Espelkamp
T: +49-5772-293-100
F: +49-5772-293-333
https://www.mittwald.de
Geschäftsführer: Robert Meyer
St.Nr.: 331/5721/1033, USt-IdNr.: DE814773217, HRA 6640, AG Bad Oeynhausen
Komplementärin: Robert Meyer Verwaltungs GmbH, HRB 13260, AG Bad Oeynhausen
_______________________________________________
Engine-devel mailing list
Engine-devel(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/engine-devel
3793
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3793
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3 comments
4 participants
participants (4)
-
Itamar Heim -
Liran Zelkha -
Sven Kieske -
Yaniv Dary