2 Datacenters to 1

[andygee1]

We have had 2 physically separate datacenters that we now have moved everything to one. So we have 3 hosts in each, I would like to move all the hosts into one of the datacenters. Is there a way to do this without losing the configuration and vm's that are on the hosts?

Thanks,

Andy

 

[bbgeek17]

Hi Andygee1,

Combining a VM-hosting node into existing cluster is not supported. You will need to clear out the node before joining it. There are still options to achieve your goal of merging the nodes and avoiding the loss of the config:
- backup/restore
- remote migration

Other more surgical methods that highly depend on your existing infrastructure (storage) and your knowledge of PVE architecture. Generally the above two are the recommended methods.

Cheers

---

Blockbridge : Ultra low latency all-NVME shared storage for Proxmox - https://www.blockbridge.com/proxmox

 

[alexskysilk]

the point about the storage infrastructure is insidious.

IF your target cluster is able to attach the storage for the source cluster, it is possible to do this without any data movement; simple MOVE the vmid.conf files to the other cluster.

BUT as @bbgeek17 pointed out, this can be more dangerous than the backup/restore method, which is safer and more dependable.