Procedure to turn off ceph private network switch

[Ting]

Hi,

I have a 6 cluster ceph (12 OSDs) running for a while now, and ceph public and private networks are on separated switches, I need to turn off private network switch for about 30 mins, wondering what is the best practice to do this. Thanks

 

[gurubert]

As the cluster network is optional you should be able to remove it from the configuration without any issues.

 

[Ting]

Thanks for your reply.

You mean I need to remove ceph public network first, then turn it off? And when it come back up, I add back ceph public network?

 

[Ting]

I mean in ceph configuration file.

 

[gurubert]

If you have it in the config file and not the config db you need to restart the ceph daemons.

 

[spirit]

you should remove cluster network from ceph.conf, then restart all osd. (cluster network is only used for replication between the osd).

You'll have a storage hang during the restart of all osd (try to restart them all at the same time).