Hi David,
Thank you for pointing out the option.
On http://docs.ceph.com/docs/infernalis/release-notes/ one can read:
*
Ceph daemons now run as user and group ceph by default. The ceph
user has a static UID assigned by Fedora and Debian (also used by
derivative distributions like RHEL/CentOS and Ubuntu). On SUSE the
ceph user will currently get a dynamically assigned UID when the
user is created.
If your systems already have a ceph user, upgrading the package will
cause problems. We suggest you first remove or rename the existing
‘ceph’ user before upgrading.
When upgrading, administrators have two options:
1.
Add the following line to ceph.conf on all hosts:
setuser match path = /var/lib/ceph/$type/$cluster-$id
This will make the Ceph daemons run as root (i.e., not drop
privileges and switch to user ceph) if the daemon’s data
directory is still owned by root. Newly deployed daemons
will be created with data owned by user ceph and will run
with reduced privileges, but upgraded daemons will continue
to run as root.
2.
Fix the data ownership during the upgrade. This is the
preferred option, but is more work. The process for each
host would be to:
1.
Upgrade the ceph package. This creates the ceph user and
group. For example:
ceph-deploy install --stable infernalis HOST
2.
Stop the daemon(s).:
service ceph stop # fedora, centos, rhel, debian
stop ceph-all # ubuntu
3.
Fix the ownership:
chown -R ceph:ceph /var/lib/ceph
4.
Restart the daemon(s).:
start ceph-all # ubuntu
systemctl start ceph.target # debian, centos, fedora, rhel
Since it seemed more elegant to me, I chose the second option and
followed the steps.
To be continued... Over night, some more placement groups seem to be
inconsistent. I'll post my findings later on.
Regards,
Kees
On 17-08-18 17:21, David Turner wrote:
In your baby step upgrade you should avoid the 2 non-LTS releases of
Infernalis and Kraken. You should go from Hammer to Jewel to Luminous.
The general rule of doing the upgrade to put all of your OSDs to be
owned by ceph was to not change the ownership as part of the upgrade.
There is a [1] config option that tells Ceph to override the user the
daemons run as so that you can separate these 2 operations from each
other simplifying each maintenance task. It will set the user to
whatever the user is for each daemon's folder.
[1]
setuser match path = /var/lib/ceph/$type/$cluster-$id
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