Thanks for sharing Wido. >From your information you only talk about MON and OSD. What about the RGW nodes? You stated in the beginning that 99% is rgw... On Wed, Jul 13, 2016 at 3:56 PM, Wido den Hollander <wido@xxxxxxxx> wrote: > Hello, > > The last 3 days I worked at a customer with a 1800 OSD cluster which had to be upgraded from Hammer 0.94.5 to Jewel 10.2.2 > > The cluster in this case is 99% RGW, but also some RBD. > > I wanted to share some of the things we encountered during this upgrade. > > All 180 nodes are running CentOS 7.1 on a IPv6-only network. > > ** Hammer Upgrade ** > At first we upgraded from 0.94.5 to 0.94.7, this went well except for the fact that the monitors got spammed with these kind of messages: > > "Failed to encode map eXXX with expected crc" > > Some searching on the list brought me to: > > ceph tell osd.* injectargs -- --clog_to_monitors=false > > This reduced the load on the 5 monitors and made recovery succeed smoothly. > > ** Monitors to Jewel ** > The next step was to upgrade the monitors from Hammer to Jewel. > > Using Salt we upgraded the packages and afterwards it was simple: > > killall ceph-mon > chown -R ceph:ceph /var/lib/ceph > chown -R ceph:ceph /var/log/ceph > > Now, a systemd quirck. 'systemctl start ceph.target' does not work, I had to manually enabled the monitor and start it: > > systemctl enable ceph-mon@srv-zmb04-05.service > systemctl start ceph-mon@srv-zmb04-05.service > > Afterwards the monitors were running just fine. > > ** OSDs to Jewel ** > To upgrade the OSDs to Jewel we initially used Salt to update the packages on all systems to 10.2.2, we then used a Shell script which we ran on one node at a time. > > The failure domain here is 'rack', so we executed this in one rack, then the next one, etc, etc. > > Script can be found on Github: https://gist.github.com/wido/06eac901bd42f01ca2f4f1a1d76c49a6 > > Be aware that the chown can take a long, long, very long time! > > We ran into the issue that some OSDs crashed after start. But after trying again they would start. > > "void FileStore::init_temp_collections()" > > I reported this in the tracker as I'm not sure what is happening here: http://tracker.ceph.com/issues/16672 > > ** New OSDs with Jewel ** > We also had some new nodes which we wanted to add to the Jewel cluster. > > Using Salt and ceph-disk we ran into a partprobe issue in combination with ceph-disk. There was already a Pull Request for the fix, but that was not included in Jewel 10.2.2. > > We manually applied the PR and it fixed our issues: https://github.com/ceph/ceph/pull/9330 > > Hope this helps other people with their upgrades to Jewel! > > Wido > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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