Two questions about ceph update/upgrade strategies

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



I have a fresh ceph 14.2.1 cluster up and running based on Ubuntu 18.04.
It consists of 9 hosts (+1 admin host). The nine hosts have each 16
ceph-osd daemons running, three in these nine hosts also have
a ceph-mon and a ceph-mgr daemon running. So three hosts are running
osd, mon and also mgr daemons.

Now I am unsure about the right way to go for ceph upgrades and linux
system host updates.

Ceph-Upgrade:
Reading the ceph upgrade docs I ask myself how a future upgrade say to
14.2.2 should be performed correctly? The recommendation says to upgrade
first monitors, then osds etc...

So what is the correct way to go in a mixed setup like mine? Following
the rules strictly would mean not to use ceph-deploy install, but
instead to log into the mon(/osd) hosts and then upgrade only the
ceph-mon package and restart this mon, and then do the same with the
other monitors/osd hosts. After all mons have been successfully upgraded
I should then continue with upgrading OSDs (ceph-osd package) on one
host and restart all osds on this host one after another or reboot the
whole host. Then proceed to the next osd-host.

Is this the correct and best way to go?

Linux system updates:
The second point I would like to hear your opinions about is how you
handle linux system updates? Since even a non ceph linux system package
update might break ceph or even stop the whole linux host from booting,
care has to be taken. So how do you handle this problem? Do you run host
upgrades only manually in a fixed sequence eg first on a osd/mon host
and if the update is successful, then run the linux system package
updates on the other hosts?   Do you use another strategy?

Thanks
Rainer
-- 
Rainer Krienke, Uni Koblenz, Rechenzentrum, A22, Universitaetsstrasse 1
56070 Koblenz, Tel: +49261287 1312 Fax +49261287 100 1312
Web: http://userpages.uni-koblenz.de/~krienke
PGP: http://userpages.uni-koblenz.de/~krienke/mypgp.html
_______________________________________________
ceph-users mailing list
ceph-users@xxxxxxxxxxxxxx
http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com



[Index of Archives]     [Information on CEPH]     [Linux Filesystem Development]     [Ceph Development]     [Ceph Large]     [Ceph Dev]     [Linux USB Development]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]     [xfs]


  Powered by Linux