Ask Your Question
0

nova service-list shows that all compute node are "down".

asked 2016-05-19 03:39:25 -0600

sosogh@gmail.com gravatar image

We have run openstack(icehouse on ubt 12.04/14.04) for a year. We setup RabbitMQ in master/slave mode . Openstack component connect to MQ via its vip. Some days ago ,the MQ master node went down , so the vip floated to slave node, after master node rebooted , vip floated back to master node.

And we have a problem now: nova service-list shows that all compute node are "down".

But in fact , there exists connection between compute node and MQ root@computenode:~# sudo netstat -antp |grep 5672 tcp 0 0 10.0.0.10:28846 10.0.2.7:5672 ESTABLISHED 53206/python
tcp 0 0 10.0.0.10:42368 10.0.2.7:5672 ESTABLISHED 2519/python
tcp 0 0 10.0.0.10:28847 10.0.2.7:5672 ESTABLISHED 53206/python
tcp 0 0 10.0.0.10:42367 10.0.2.7:5672 ESTABLISHED 2519/python
tcp 0 0 10.0.0.10:28845 10.0.2.7:5672 ESTABLISHED 53206/python

pid 2519 is neutron-openvswitch-agent pid 53206 is nova-compute

I know that if I restart nova-compute on the compute node, it will fix the problem , but it will cause a short network outage(some seconds) for the VM on that compute node .

My question is that : Is there any way to fix this problem without causing a short network outage for the VM ? Thank you .

edit retag flag offensive close merge delete

Comments

restart your nova-compute in the compute node and verified your configuration the @ip, syntaxe, the /etc/hosts , the name server !!! . if all service up without compute, make sure you have unconfiguration error. good luck

Dhekra gravatar imageDhekra ( 2016-05-20 03:23:46 -0600 )edit

1 answer

Sort by » oldest newest most voted
0

answered 2016-05-19 18:48:28 -0600

jbajin gravatar image

You can restart nova-compute on the compute nodes without any impact to your VM's. The Neutron Agent will be impacted and unfortunately there is no other option than restarting the agent.

edit flag offensive delete link more

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

Get to know Ask OpenStack

Resources for moderators

Question Tools

1 follower

Stats

Asked: 2016-05-19 03:39:25 -0600

Seen: 1,056 times

Last updated: May 19 '16