How to move vm's from one network to another?

[kriskenbe]

Note to myself : first read the forums over here, then try something out...

At this moment I got 3 servers all running Proxmox in datacenter A. These 3 servers are all into one cluster and have an Ip in the range 185.18.x.y/24. I also have one server in datacenter B, on my own network with an ip in the range 193.56.x.y/24.

The 3 servers in datacenter A are quite old, and I have the plan to move all vm's to datacenter B (on my own network). So I tought this would be an easy thing : I just add the server from datacenter B to the cluster of datacenter A, move the VM's, change the IP addresses on the vm's and done.

Well... Not really...

I could actually add the server from datacenter B to the cluster on datacenter A. It did recognice everything. I could even add it! But when done, it seems that this is a no-go. I couldn't log in into the new server at all. I searched around in the forums here and well. What seemed as a great idea didn't work out at all...

So, some questions...
1. How can I delete the server B from the cluster?
2. I can't login using the webif screen on server B. How can I change it as it was before?
3. How can I move all the vm's from datacenter A to datacenter B without moving the servers?

Best regards
Kris

 

[LnxBil]

How can I delete the server B from the cluster?

https://pve.proxmox.com/wiki/Cluster_Manager#_remove_a_cluster_node

I can't login using the webif screen on server B. How can I change it as it was before?

First remove the node, maybe reinstall and create the cluster on the target

How can I move all the vm's from datacenter A to datacenter B without moving the servers?

Backup and restore