Add cluster network to existing system.

[ianmbetts]

Hi,
I have a 3 node hyper-converged setup which was created with a combined cluster and public network.
I would like to add a separate cluster network, but am unsure if and how this can be done on an existing installation.
Any tips would be appreciated.

 

[ph0x]

That should easily be possible according to that post:

https://stackoverflow.com/questions/61763230/configure-a-cluster-network-with-cephadm

 

[spirit]

Hi,
I have a 3 node hyper-converged setup which was created with a combined cluster and public network.
I would like to add a separate cluster network, but am unsure if and how this can be done on an existing installation.
Any tips would be appreciated.

it should be possible with editing ceph.conf, adding

[global]
        cluster_network = {cluster-network/netmask}

You'll need to restart osds. I think monitor && vms client should be ok, as they use the public network.

 

[ianmbetts]

Thanks, yes it was quite straightforward in the end. I modified the global section to redefine the cluster network. I destroyed and recreated the monitors one at a time (maybe this wasn't necessary?) but it was only after restarting the OSDs that I saw traffic starting to flow on the cluster network.