Dear Cephalopodians, I'm probably missing something obvious, but I am at a loss here on how to actually make use of a customized crush location hook. I'm currently on "ceph version 13.2.1" on CentOS 7 (i.e. the last version before the upgrade-preventing bugs). Here's what I did: 1. Write a script /usr/local/bin/customized-ceph-crush-location. The script can be executed by user "ceph": # sudo -u ceph /usr/local/bin/customized-ceph-crush-location host=osd001 datacenter=FTD root=default 2. Add the following to ceph.conf: [osd] crush_location_hook = /usr/local/bin/customized-ceph-crush-location 3. Restart an OSD and confirm that is picked up: # systemctl restart ceph-osd@0 # ceph config show-with-defaults osd.0 ... crush_location_hook /usr/local/bin/customized-ceph-crush-location file ... osd_crush_update_on_start true default ... However, the script is not executed, and I can ensure that since the script should also write a log to /tmp, which is not created. Also, the "datacenter" type does not show up in the crush tree. I have already disabled SELinux just to make sure. Any ideas what I am missing here? Cheers and thanks in advance, Oliver
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