----- Le 16 Mai 17, à 20:43, Shain Miley <[email protected]> a écrit :
> Hello,
> I am going to be upgrading our production Ceph cluster from
> Hammer/Ubuntu 14.04 to Jewel/Ubuntu 16.04 and I wanted to ask a question
> and sanity check my upgrade plan.
> Here are the steps I am planning to take during the upgrade:
Hi Shain,
0) upgrade operating system packages first and reboot on new kernel if needed.
> 1)Upgrade to latest hammer on current cluster
> 2)Remove or rename the existing ‘ceph’ user and ‘ceph’ group on each node
> 3)Upgrade the ceph packages to latest Jewel (mon, then osd, then rbd
> clients)
You might want to upgrade the RBD clients first. This may not be a mandatory
step but a careful one.
> 4)stop ceph daemons
> 5)change permissions on ceph directories and osd journals:
> find /var/lib/ceph/osd -maxdepth 1 -mindepth 1 -type d|parallel chown -R
> 64045:64045
> chown 64045:64045 /var/lib/ceph
> chown 64045:64045 /var/lib/ceph/*
> chown 64045:64045 /var/lib/ceph/bootstrap-*/*
> for ID in $(ls /var/lib/ceph/osd/|cut -d '-' -f 2); do
> JOURNAL=$(readlink -f /var/lib/ceph/osd/ceph-${ID}/journal)
> chown ceph ${JOURNAL}
You can avoid this step by adding setuser_match_path =
/var/lib/ceph/$type/$cluster-$id to the [osd] section. This will make the Ceph
daemons run as root if the daemon’s data directory is still owned by root.
Newly deployed daemons will be created with data owned by user ceph and will
run with reduced privileges, but upgraded daemons will continue to run as root.
Or you can still change the property of the files to ceph but it might be long
depending on the number of objects and PGs you have in your cluster, for an
average zero benefit, especially since when bluestore comes out, you'll
recreate all these datas.
> 6)restart ceph daemons
> The two questions I have are:
> 1)Am I missing anything from the steps above...based on prior
> experiences performing upgrades of this kind?
> 2)Should I upgrade to Ubuntu 16.04 first and then upgrade Ceph...or vice
> versa?
This documentation (http://docs.ceph.com/docs/master/start/os-recommendations/)
suggest to stick with Ubuntu 14.04 but RHCS KB show that RHCS 2.x (Jewel
10.2.x) is only supported on Ubuntu 16.04.
When upgrading from Hammer to Jewel, we upgraded OS first from RHEL 7 to 7.1
then RHCS. I'm not sure whether you should temporarily run Hammer on Ubuntu
16.04 or Jewel on Ubuntu 14.04.
I would upgrade the lowest layer first (OS) of a single OSD node and see how it
goes.
Regards,
Frederic.
> Thanks in advance,
> Shain
> --
> NPR | Shain Miley | Manager of Infrastructure, Digital Media | [email protected]
> |
> 202.513.3649
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