Migration Issue: VMs from Standalone Node to Cluster

[Kratus]

Hi team,


I'm trying to migrate several VMs from a standalone Proxmox node to a clustered environment. I already attempted a live migration via network using SSH from the standalone node to the cluster node, but I encountered issues – especially with some heavier VMs, as their disks aren’t transferred via LVM thin – and I don't have any external storage to export VM backups.


Considering these limitations, what would be the most efficient and reliable method to migrate these VMs to my new cluster, given that I have limited disk space and no additional host for Proxmox backups to export the VMs afterward?


Any insights would be greatly appreciated. Apologies if something seems off—I’m still not fully fluent with Proxmox.


Thanks!

 

[Weehooey-HSS]

Hello!

I always have great luck with:

qm remote-migrate

Check out the options here

 

[Kratus]

Hello!

I always have great luck with:

qm remote-migrate

Check out the options here

Hello ,

I've been trying to migrate a VM between my nodes using various commands (including qm remote-migrate), but none of them have worked so far. I keep running into errors like “400 not enough arguments” or “Unable to parse option,” even though I’m using the latest Proxmox version on all nodes. but still no success.

Any advice or insights would be greatly appreciated.

Thank you in advance!

 

[Weehooey-HSS]

Hello!

The screenshots of the commands you ran above show that you are missing some arguments for qm remote-migrate. If you use the IP and not the hostnames, you need to specify a fingerprint when using the command.

qm remote-migrate <localVMID> <RemoteVMID> 'host=<IPorHostname>,apitoken=PVEAPIToken=<ApiTokenName>=<Token_Here>,fingerprint=<Fingerprint>' --target-bridge=<BridgeName> --target-storage=<StorageName> --online 1

You can grab the fingerprint for your remote device with

pvenode cert info --output-format json

 

[ghusson]

Maybe you can try Proxmox Datacenter Manager ?

 

[Kratus]

Maybe you can try Proxmox Datacenter Manager ?

In this situation, using Proxmox Datacenter Manager, would I have to reinstall the entire host named “pve alpha,” which is my first cluster node? If I install Datacenter Manager, do I need to reconfigure that node? And could I add the “teste” node together with “alpha” so that VM migration becomes more efficient?

 

[Weehooey-HSS]

You will not need to re-install; it is in ALPHA, however.

More information here and here
You can run it as a VM, and it will handle the Remote migration commands from the PDM GUI.