https://pve.proxmox.com/wiki/Proxmox_VE_2.0_Cluster#Remove_a_cluster_node According to that you are supposed to shut down the node(s) and make sure they do not come back. Well, i did just that. I had 4 nodes for testing, turns out did not need 2 of them. So, i shut down the 2 nodes, and actually already recycled those (reinstalled etc.) Now i get this: :~# pvecm delnode vnode0163 cluster not ready - no quorum? How do i fix this? I know the remaining 2 nodes are in sync. Also someone should update the wiki to remove the nodes first, or warning about quorum issues and link to fix.