Mastering Proxmox - Third Edition

Ceph node running out of resources during recovery

On day-to-day operations, a Ceph node uses very little resources such as CPU and memory. But during a cluster recovery, Ceph redistributes a large amount of data between OSDs, which uses up a large portion of the node resources. If a node is constantly running out of resources during recovery, check whether there are any VMs running on that node. Those VMs will need to be powered off or migrated to another node until the rebalancing finishes. If this is not the case, then check the available resources of the node. It may be that the node simply does not have enough resources to keep up with the Ceph recovery. Another common reason for running out of resources is that Ceph may be configured ...