Hi,
Currently I am decommissioning an old cluster.
For example, I want to remove OSD Server X with all its OSD's.
I am following these steps for all OSD's of Server X:
- ceph osd out <osd>
- Wait for rebalance (active+clean)
- On OSD: service ceph stop osd.<osd>
Once the steps above are performed, the following steps should be
performed:
- ceph osd crush remove osd.<osd>
- ceph auth del osd.<osd>
- ceph osd rm <osd>
What I don't get is, when I perform 'ceph osd out <osd>' the cluster is
rebalancing, but when I perform 'ceph osd crush remove osd.<osd>' it
again starts to rebalance. Why does this happen? The cluster should be
already balanced after out'ed the osd. I didn't expect another rebalance
with removing the OSD from the CRUSH map.
Thanks!
Sinan Polat
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