Open Stack

Just what I needed, thanks Sam.  And I can also confirm this works like a champ.

I was digging through oslo.messaging stuff looking for this, I completely overlooked the notification settings in ceilometer itself.

Appreciate pointing me in the right direction!
Mike


From: Sam Morrison <sorrison at gmail.com>
Date: Thursday, November 3, 2016 at 7:04 PM
To: Mike Dorman <mdorman at godaddy.com>
Cc: OpenStack Operators <openstack-operators at lists.openstack.org>
Subject: Re: [Openstack-operators] Ceilometer/oslo.messaging connect to multiple RMQ endpoints

That was me! and yes you can do it when consuming notifications with ceilometer-agent-notification

Eg in our ceilometer.conf we have

[notification]
workers=12
disable_non_metric_meters=true
store_events = true
batch_size = 50
batch_timeout = 5
messaging_urls = rabbit://XX:XX@rabbithost1:5671/vhost1
messaging_urls = rabbit://XX:XX@rabbithost2:5671/vhost2
messaging_urls = rabbit://XX:XX@rabbithost3:5671/vhost3


If no messaging_urls are set then it will fall back to the settings in the [oslo_messaging_rabbit] config section
Also if you set messaging_urls then it won’t consume from the rabbit specified in [oslo_messaging_rabbit] so you have to add it to messaging_urls too.

Cheers,
Sam




On 4 Nov. 2016, at 10:28 am, Mike Dorman <mdorman at godaddy.com<mailto:mdorman at godaddy.com>> wrote:

I heard third hand from the summit that it’s possible to configure Ceilometer/oslo.messaging with multiple rabbitmq_hosts config entries, which will let you connect to multiple RMQ endpoints at the same time.

The scenario here is we use the Ceilometer notification agent the pipe events from OpenStack services into a Kafka queue for consumption by other team(s) in the company.  We also run Nova cells v1, so we have to run one Ceilometer agent for the API cell, as well as an agent for every compute cell (because they have independent RMQ clusters.)

Anyway, I tried configuring it this way and it still only connects to a single RMQ server.  We’re running Liberty Ceilometer and oslo.messaging, so I’m wondering if this behavior is only in a later version?  Can anybody shed any light?  I would love to get away from running so many Ceilometer agents.

Thanks!
Mike

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