I have my one big server with NVME for the guests. Works great. Sometimes an update is pushed by proxmox which requires a reboot. So I have an (older) sandybridge server which I added to the cluster. I migrate all the storage to NFS, then all the guests to the other node. Upgrade & reboot. Then move everything back. I don't really want to leave the other server up consuming power 7x24, but if there is an unexpected reboot (power failure?), the main server will not come back up, even though two_node is set (due to default setting of wait_for_all). I could turn off wait_for_all, but I'm also wondering if there is a recommended way to turn on the cluster services only when needed? Thanks!