[ceph-users] How to know is ceph is ready?

I have a proxmox cluster using an external CEPH cluster. Sometimes due to blackouts the servers need to restart. If proxmox starts before CEPH is ready the VMs fail to boot. I want to add a dependency in proxmox to wait for ceph to be ready. I can work with a HEALTH_WARN as long the RBD pool is usable. ceph status exit status doesn´t helps Should I grep for "pgs not active" in ceph status or for "inactive" pgs in ceph health or is there something more direct to know if everything is alright? -- Alfrenovsky