Test failover CEPH not work

[teerawich]

Hello,

I have 3 nodes clusters with CEPH test Proxmox VE 5.4
- 3 Mon
- 6 OSD (2 x per node)
- Configured 2 Replica
- Running VM on CEPH storage

Then I have shutdown 1 node for testing VM on CEPH, VM running but can't write to disk.

How can I fix it ? Please recommended.

Thank you.

 

[Alwin]

- Configured 2 Replica

First off, don't run with replica 2, especially in small clusters. It can happen that no copy of an object is written on disk during failure/recovery. Besides that, if your min_size is also 2, then Ceph doesn't allow writes till 2 copies are established of all the objects in a pool. Best run with size 3 / min_size 2.

 

[teerawich]

Hello,

First off, don't run with replica 2, especially in small clusters. It can happen that no copy of an object is written on disk during failure/recovery. Besides that, if your min_size is also 2, then Ceph doesn't allow writes till 2 copies are established of all the objects in a pool. Best run with size 3 / min_size 2.

It's work.

Thank you.