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Slow instance launch times due to RabbitMQ


Another thing to check if you're having seemingly inexplicable messaging 
issues is that there isn't a notification queue filling up somewhere. If 
notifications are enabled somewhere but nothing is consuming them the 
size of the queue will eventually grind rabbit to a halt.

I used to check queue sizes through the rabbit web ui, so I have to 
admit I'm not sure how to do it through the cli.

On 7/31/19 10:48 AM, Gabriele Santomaggio wrote:
> Hi,
> Are you using ssl connections ?
> 
> Can be this issue ?
> https://bugs.launchpad.net/ubuntu/+source/oslo.messaging/+bug/1800957
> 
> 
> ------------------------------------------------------------------------
> *From:* Laurent Dumont <laurentfdumont at gmail.com>
> *Sent:* Wednesday, July 31, 2019 4:20 PM
> *To:* Grant Morley
> *Cc:* openstack-operators at lists.openstack.org
> *Subject:* Re: Slow instance launch times due to RabbitMQ
> That is a bit strange, list_queues should return stuff. Couple of ideas :
> 
>   * Are the Rabbit connection failure logs on the compute pointing to a
>     specific controller?
>   * Are there any logs within Rabbit on the controller that would point
>     to a transient issue?
>   * cluster_status is a snapshot of the cluster at the time you ran the
>     command. If the alarms have cleared, you won't see anything.
>   * If you have the RabbitMQ management plugin activated, I would
>     recommend a quick look to see the historical metrics and overall status.
> 
> 
> On Wed, Jul 31, 2019 at 9:35 AM Grant Morley <grant at civo.com 
> <mailto:grant at civo.com>> wrote:
> 
>     Hi guys,
> 
>     We are using Ubuntu 16 and OpenStack ansible to do our setup.
> 
>     rabbitmqctl list_queues
>     Listing queues
> 
>     (Doesn't appear to be any queues )
> 
>     rabbitmqctl cluster_status
> 
>     Cluster status of node
>     'rabbit at management-1-rabbit-mq-container-b4d7791f'
>     [{nodes,[{disc,['rabbit at management-1-rabbit-mq-container-b4d7791f',
>                      'rabbit at management-2-rabbit-mq-container-b455e77d',
>                      'rabbit at management-3-rabbit-mq-container-1d6ae377']}]},
>       {running_nodes,['rabbit at management-3-rabbit-mq-container-1d6ae377',
>                       'rabbit at management-2-rabbit-mq-container-b455e77d',
>                       'rabbit at management-1-rabbit-mq-container-b4d7791f']},
>       {cluster_name,<<"openstack">>},
>       {partitions,[]},
>       {alarms,[{'rabbit at management-3-rabbit-mq-container-1d6ae377',[]},
>                {'rabbit at management-2-rabbit-mq-container-b455e77d',[]},
>                {'rabbit at management-1-rabbit-mq-container-b4d7791f',[]}]}]
> 
>     Regards,
> 
>     On 31/07/2019 11:49, Laurent Dumont wrote:
>>     Could you forward the output of the following commands on a
>>     controller node? :
>>
>>     rabbitmqctl cluster_status
>>     rabbitmqctl list_queues
>>
>>     You won't necessarily see a high load on a Rabbit cluster that is
>>     in a bad state.
>>
>>     On Wed, Jul 31, 2019 at 5:19 AM Grant Morley <grant at civo.com
>>     <mailto:grant at civo.com>> wrote:
>>
>>         Hi all,
>>
>>         We are randomly seeing slow instance launch / deletion times
>>         and it appears to be because of RabbitMQ. We are seeing a lot
>>         of these messages in the logs for Nova and Neutron:
>>
>>         ERROR oslo.messaging._drivers.impl_rabbit [-]
>>         [f4ab3ca0-b837-4962-95ef-dfd7d60686b6] AMQP server on
>>         10.6.2.212:5671 <http://10.6.2.212:5671> is unreachable: Too
>>         many heartbeats missed. Trying again in 1 seconds. Client
>>         port: 37098: ConnectionForced: Too many heartbeats missed
>>
>>         The RabbitMQ cluster isn't under high load and I am not seeing
>>         any packets drop over the network when I do some tracing.
>>
>>         We are only running 15 compute nodes currently and have >1000
>>         instances so it isn't a large deployment.
>>
>>         Are there any good configuration tweaks for RabbitMQ running
>>         on OpenStack Queens?
>>
>>         Many Thanks,
>>
>>         -- 
>>
>>         Grant Morley
>>         Cloud Lead, Civo Ltd
>>         www.civo.com <https://www.civo.com/>| Signup for an account!
>>         <https://www.civo.com/signup>
>>
>     -- 
> 
>     Grant Morley
>     Cloud Lead, Civo Ltd
>     www.civo.com <https://www.civo.com/>| Signup for an account!
>     <https://www.civo.com/signup>
>