add existing standalone node to new cluster

FinalD

New Member
Mar 11, 2025
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Hello,

I have a setup with a standalone node without a cluster configured. I want to add a LXC container to the node but this isn't possible because of the error message "Node seems to be offline" in the GUI when I try to create the new container.

I read the documentation and if I'm not mistaken these are the steps to create a new cluster and and configure nodes (https://pve.proxmox.com/wiki/Cluster_Manager#_preparing_nodes). But it also writes that it isn't possible adding a node with existing guests to this newly created cluster. Additionally I found this thread (https://forum.proxmox.com/threads/adding-non-empty-node-to-cluster.90976/) mentioning that this should be done by creating a cluster on the non empty node. But how can this be done?

Or is this the wrong way to add an existing standalone node to a (not yet created) cluster?

Thanks in advance.