The directory /etc/pve when making changes to the server disappeared, I reverted the changes but still can not see the content, what do I do? I have no backups.
That's normal when the pve-cluster service does not start. Can you find the actual reason for the failure in journalctl -b (you might have to scroll and search a bit)?
The directory /etc/pve when making changes to the server disappeared, I reverted the changes but still can not see the content, what do I do?
There might be something wrong in one of your /etc/hosts file. Please post it and make sure each IP + name is correct in the /etc/hosts file.
Renaming a node while still in cluster, might make some issues. The correct way is to remove the node and the readd it again to the cluster. Please also post /etc/pve/corosync.conf and /etc/network/interfaces of each host.