I am an apprentice, so please don't be too harsh on me.
We have a productive environment with a cluster of 4 servers running on Proxmox. For a new project, I wanted to transfer Proxmox to a new network. Old network: 172.16.123.0 New network: 192.168.103.0 As a beginner, I simply changed the IPv4 address of server 1 (hostname: AZB001) to an address in the new network. So, 172.16.123.11 became 192.168.103.11. Unfortunately, I had set up the network adapter incorrectly, and the server became unreachable. After fixing everything, I could access the Proxmox web interface via https://192.168.103.11:8006. Now, the web interface only shows one server in the cluster. The other three servers are not marked as offline or listed. If I access the web interface of server 2 (AZB002) on the old network, it shows AZB001 as offline. So far, so good.
NOW TO MY PROBLEM: I need to transfer the other three servers (AZB002, AZB003, and AZB004) as well. So, I transferred AZB002 to the new network with the same steps as for AZB001. AZB001 and AZB002 can ping each other.
However, when I open the web interface of AZB001, it cannot find AZB002 and does not show it as offline. This is because the cluster configuration has been broken due to the transfer. When I try "pvecm add <IP address/hostname>" on the console, I get an error message that a cluster configuration already exists. Therefore, I tried to delete the existing configuration files. However, I couldn't do this because some files did not exist at the paths I found on the network, and some files could not be deleted due to permission denied, even though I was logged in as a root user or with sudo rights. Can anyone help me with this?
