On 8/31/19 12:33 AM, Brett Chancellor wrote:

Before I write something that's already been done, are there any built in utilities or tools that can tell me if it's safe to reboot a host? I'm looking for something better than just checking the health status, but rather checking pg status and ensuring that a reboot wouldn't take any undersized PGs offline. Thanks.

Yes you can! Find OSD's by bucket, like `ceph osd ls-tree <host>`, then check this OSD's is safe for maintenance `ceph osd ok-to-stop <osd.n>`. k