Cluster problems after removal and re-adding the same node

[DerekG]

Hoping someone can advise here.

I have a 4 node cluster in my homelab setup - all tiny PC's. I faced issues with pve-2, which happens to be cluster ID:1.
So I removed from the cluster, deleted the cluster with run: pvecm delnode pve-2. Rebuilt the node with a fresh Proxmox install and added back into the cluster, same IP address and node name.

When I tried to open the shell it gave a warning about the RSA key being incorrect, so accepted the new key, then run: pvecm updatecerts to correct the certs.
Now I am able to restore VM's from backup, but if I try to migrate a VM from another node, I still get a warning WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!

The migration wizard offers some advice to resolve the issue, but I can't see how to resolve. see attached

The migration halts with migration aborted (duration 00:00:00): Can't connect to destination address using public key

Any advice would be much appreciated.

DerekG

 

[DerekG]

Hi Sterzy,

Thanks for the prompt advise. Does that mean i should remove the node pve-2 again, remove the old pve-2 key and then re-add pve-2?

DerekG

 

[czechsys]

Cluster communication is based on ssh, so fix ssh (key, authorized_keys) on every node (/etc/root, /etc/pve directories).

 

[DerekG]

This advise is great, but for a novice like me who does most from the web interface, difficult to follow.