Hi Ken, I'll work on http://tracker.ceph.com/issues/14972 and create that script. Thanks for a nice and precise description :-) On 03/03/2016 05:50, Ken Dreyer wrote: > Hi Loic, > > In Red Hat we're interested in having a Ceph "facts" file that we can > integrate with RHEL's subscription-manager (upstream > http://www.candlepinproject.org/ fyi) in order to report on the > available raw disk capacity available per OSD. > > We need a script to write a "/etc/rhsm/facts/ceph_disk.facts" file. > That file needs to contain JSON of the form: > > { > "band.storage.usage": <integer number of TB used on this node, such as 55> > } > > for example: > { > "band.storage.usage": 55 > } > > As long as that file exists (and it can be named anything that ends in > ".facts") the contents will be read in and added to the system facts. > On RHEL this can be verified by running `subscription-manager facts` > to ensure that your value is showing up properly. > > In terms of creating this .facts file, we will need a script to do > that. We could call it /usr/bin/ceph-update-fact-file, or make it a > ceph-disk sub-command, or whatever you want, really. > > The facts file should be kept up-to-date every four hours, which makes > me think that we could implement this as a systemd service and timer. > Something like > > $ cat /etc/systemd/system/ceph-update-facts-file.service > > [Unit] > Description=Update Ceph OSD fact file > > [Service] > Type=oneshot > ExecStart=/usr/bin/ceph-update-fact-file > > > ...and: > > $ cat /etc/systemd/system/ceph-update-facts-file.timer > [Unit] > Description=Trigger an automatic rewrite every four hours > > [Timer] > OnCalendar=4hours > Persistent=true > > [Install] > WantedBy=multi-user.target > > (The above is untested, it's just an idea). What do you think? > -- > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- Loïc Dachary, Artisan Logiciel Libre -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
