Transfer of nodes from VM between clusters

[Maksimus]

Is it possible to add another node to an existing cluster, but with already running VMs on this node. I want to transfer a node from cluster A to cluster B with all VMs running on it

 

[nunner]

Hi,

no, this is not possible. From the documentation [1]:

A node that is about to be added to the cluster cannot hold any guests. All existing configuration in /etc/pve is overwritten when joining a cluster, since guest IDs could otherwise conflict. As a workaround, you can create a backup of the guest (vzdump) and restore it under a different ID, after the node has been added to the cluster.

[1] https://pve.proxmox.com/pve-docs/pve-admin-guide.html#pvecm_join_node_to_cluster