Balancing MDS services on hosts

[s.paulusma@xxxxxxxxxxxxxxxxxx]

I deployed a small cluster for testing/deploying CephFS with cephadm. I was wondering if it's possible to balance the active and standby daemons on hosts.

The service configuration:

service_type: mds

service_id: test-fs

service_name: mds.test-fs

placement:

  count: 4

  hosts:

  - host1.example.com

  - host2.example.com

Commands used to create filesystem:

ceph fs volume create test-fs

ceph fs set test-fs max_mds 2

After the creation of the filesystem and setting the service configuration, an active and a standby service where deployed on each node.

But after a reboot of host2, the active services where all hosted on host1 and all standby services where hosted on host2. This didn't change.

It would be great if after a while the active services would be distributed evenly over the available hosts. Is it possible to achieve this at the moment (automatically or manually)?

Thanks,

Sake

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