Issues after upgrade to 5.1

[black4]

I've got 2 proxmox clusters - one with hammer ceph cluster (bigger) and second one working as a ceph client with dedicated pool (smaller). I wanted to first upgrade smaller cluster before bigger one with data. After upgrading two nodes of smaller cluster to proxmox 5.1 they are working properly about 10 minutes after startup, then they disconnecting from ceph cluster. Ceph rados process is using 100% cpu all the time. When I'm executing pvesm status command is hanging and there is starting another rados with the same cpu issue. Node also is disconnecting from pve cluster.


I've checked systemctl status - it shows failed networking.service. Debian 9 is allowing for only one gateway in /etc/network/interfaces file, so I deleted it on another interface - it fixed networking service, but not problem with rados.

I thought that new ceph client will be backward compatible.
Can someone confirm that luminous ceph client is working with hammer ceph cluster?


First cluster:
Proxmox 4.4
Ceph (Cluster) Hammer (0.94.10)


Second cluster:
Proxmox 4.4 -> 5.1
Ceph (Client) Luminous (12.2.1-pve3)

 

[Alwin]

Ceph keeps backwards compatibility for one LTS. Between Hammer and Luminous there is Jewel. The ceph packages of Debian are Jewel, so a possibility is to downgrade till you have done the upgrade of your Hammer cluster.