[doc] 6.4.3.1 Deploy Ceph Monitors and Ceph Managers

[tspmelo]

6.4.3.1 Deploy Ceph Monitors and Ceph Managers

https://susedoc.github.io/doc-ses/master/html/ses-deployment/deploy-cephadm.html#deploy-cephadm-day2-service-mon

After reading: If there are five or more nodes in the cluster, we recommend deploying five MONs

To deploy new MONs, run:
ceph orch apply mon SHORT_MON_HOST_NAME

If MONs or MGRs are not on the same subnet, you need to append the subnet address. For example:

ceph orch apply mon ses-min1:10.1.2.0/24
ceph orch apply mon ses-min2:10.1.5.0/24
ceph orch apply mgr ses-min1:10.1.2.0/24
ceph orch apply mgr ses-min2:10.1.5.0/24

I got the idea that I should run ceph orch apply mon SHORT_MON_HOST_NAME to all nodes in my cluster and all would have mon deployed. But what I got was that only the last node I ran the cmd was the mon, all the reamaing got nothing. I think the documentation should mention that running ceph orch apply mon SHORT_MON_HOST_NAME will deploy to the node and remove from the previous.

At least I think the subnet example should not contain cmds for multiple nodes.

[tbazant]

@sebastian-philipp can you confirm @tspmelo 's findings? what is then the correct MON/MGR assignment?

[tbazant]

This was already fixed by #333

[tbazant]

fixed elsewhere, closing