Re: ceph-osd restartd via systemd in case of disk error

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Am Tue, 19 Sep 2017 08:24:48 +0000
schrieb Adrian Saul <Adrian.Saul@xxxxxxxxxxxxxxxxx>:

> > I understand what you mean and it's indeed dangerous, but see:
> > https://github.com/ceph/ceph/blob/master/systemd/ceph-osd%40.service
> >
> > Looking at the systemd docs it's difficult though:
> > https://www.freedesktop.org/software/systemd/man/systemd.service.ht
> > ml
> >
> > If the OSD crashes due to another bug you do want it to restart.
> >
> > But for systemd it's not possible to see if the crash was due to a
> > disk I/O- error or a bug in the OSD itself or maybe the OOM-killer
> > or something.
> 
> Perhaps using something like RestartPreventExitStatus and defining a
> specific exit code for the OSD to exit on when it is exiting due to
> an IO error.

A other idea: The OSD daemon keeps running in a defined error state
and only stops the listeners with other OSDs and the clients. 


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