re-install cluster node

[AlexKir]

Hello!

I plan re-install cluster node

I read https://pve.proxmox.com/wiki/Proxmox_VE_4.x_Cluster#Re-installing_a_cluster_node
and have question.

Need I backup and restore ?
/etc/ssh/*
/etc/openvswitch/*

 

[Sebastiaan]

My guess on /etc/openvswitch is yes at least make a backup so you can use it later if needed.
About /etc/ssh, unless you changed something yourself you can leave those.

I think both come from a default package install but you never know if someone touched them afterwards.

 

[AlexKir]

sshd host keys in /etc/ssh , I think if I did not backup & restore it, host_key was changed
Am I wrong?

 

[Sebastiaan]

Then indeed back them up! Strange this is not in the documentation. I just checked, I have

ssh_host_dsa_key
ssh_host_dsa_key.pub
ssh_host_ecdsa_key
ssh_host_ecdsa_key.pub
ssh_host_rsa_key
ssh_host_rsa_key.pub
ssh_known_hosts -> /etc/pve/priv/known_hosts

They were created when I created the cluster. Might be that corosync syncs them when cluster gets a quorum?