[ASK] Older node was re-installed and wants to join

[dewangga]

Hi,

Previously, I was take out older node (node_id_100) for hardware replacement. And I follow using pvecm delnode <node_id>.
Currently, the node still exist on the cluster but grayed out. And I was reinstalled the older node with fresh hardware and wants to rejoin.

Is it safe to rejoin the node to existing cluster using same hostname (node_id_100)?

Thanks.

 

[dylanw]

Hi,

Currently, the node still exist on the cluster but grayed out.

Are you sure that the node was otherwise removed? Please check the output of pvecm status, to ensure that it has been removed. If it has been removed, it's possible that it's still shown because it had some VM/LXC config files stored on it, which the cluster retains as a precaution, after the delete operation. To remove the node entry from the GUI, you must delete the node entry from the cluster's "nodes" directory:

rm -rf /etc/pve/nodes/<OLD-NODE-NAME>/

Please ensure that you use the correct node name for this operation, as removing any others will harm the cluster and delete important configuration files. From your description, I guess it should be "node_id_100". Also double check the directory before deleting to ensure that you don't require any of the contained files.
Following this, as long as you have completely reinstalled Proxmox VE on the node or it's an entirely new computer, you can rejoin the cluster using the same hostname.
As a final note, it's possible that you will need to run the following command after joining the cluster, due to the reuse of the hostname:

pvecm updatecerts