[Gluster-users] How to properly shutdown Gluster (glusterd *and* related processes)

[Adam Tygart]

I filed a bug with Gentoo about a year ago related to this.
https://bugs.gentoo.org/show_bug.cgi?id=413417 The takeaway is that the
glusterd init scripts should not kill any fs or fsd processes, but they
have yet to merge the supplied patch.

--
Adam


On Wed, Apr 10, 2013 at 1:00 PM, Patrick Irvine <pirv at cybersites.ca> wrote:

>  I use gentoo and it's init scripts do stop all the daemons too.  I never
> use it though.
>
> Pat.
>
>
> On 10/04/2013 10:58 AM, Joe Julian wrote:
>
> I just discovered yesterday that the systemd configs (in the fedora rpms)
> do, indeed, stop the bricks. I think I know how to fix that and will test
> that and submit a bug report today and a patch.
>
> Patrick Irvine <pirv at cybersites.ca> <pirv at cybersites.ca> wrote:
>>
>> Hey,
>>
>> stopping the glusterd instance does not stop any of the other spawned
>> daemons.  I know this for a fact as I start and stop glusterd all the time
>> with out it affecting any of the other daemons.
>>
>> As for stopping the spawned daemons, Craig Carl ??  ( I think that's
>> right)  years ago when glusterd first came out said to just kill <pid> each
>> of the others.  To restart them your just stop and restart the glusterd
>> process and it will respawn any it finds are not already running.
>>
>> Hope this helps,
>>
>> Pat.
>>
>> On 10/04/2013 9:54 AM, Jay Vyas wrote:
>>
>> This is a great question, something I've been wondering.
>>
>> Reposting some details from jeff darcy's email regarding a similar
>> question which i asked could help shed some light on this:
>>
>>  1) The daemons that run in gluster are:
>>
>>          glusterd = management daemon
>>         glusterfsd = per-brick daemon
>>         glustershd = self-heal daemon
>>         glusterfs = usually client-side, but also NFS on servers
>>
>> 2) The lifecycle of the daemons:
>> *** The others are all started from glusterd, in response to volume
>> start and stop commands ***
>> *** They're actually all the same executable with different translators
>> ***
>>  *** glusterfs-server = the server side gluster implementation, which
>> needs to be instaled for serving gluster data ***
>>
>> 3) When glusterd starts up: It spawns any daemons that "should" be
>> running (according to which volumes are started, which have NFS or
>> replication enabled, etc.) and seem to be missing.
>>
>>
>> So...
>>
>> If thats the case then I would say that ***stopping glusterd*** should
>> invert the "starting" of the above processes ... right?
>>  But I would leave it to the gluster vets to answer this definitively...
>>
>>
>>
>>
>> On Wed, Apr 10, 2013 at 11:51 AM, Guido De Rosa <guido.derosa at vemarsas.it
>> > wrote:
>>
>>> Hello list,
>>>
>>> I've installed GlusterFS via Debian experimental packages, version
>>> 3.4.0~qa9realyalpha2-1.
>>>
>>> ( For the records, the reason I use an alpha release is that I want
>>> this feature:
>>> http://raobharata.wordpress.com/2012/10/29/qemu-glusterfs-native-integration/
>>> )
>>>
>>> I've also followed the Quick Start Guide and now I have a cluster of 2
>>> virtual machines, each contributing to a Gluster volume with one brick
>>> each.
>>>
>>> Now my issue:
>>>
>>> Let's assume no machine has actually mounted the Gluster volume.
>>>
>>> If I do:
>>>
>>>     ps aux | grep gluster
>>>
>>> I get a couple of daemons: glusterd, glusterfsd, glusterfs.
>>>
>>> If I do:
>>>
>>>     /etc/init.d/glusterfs-server stop
>>>
>>> I find (re-issuing ps) that glusterd has been terminated BUT the other
>>> processes (glusterfs and glusterfsd instances) *are still running*.
>>>
>>> (The same happens if I manually kill the glusterd process).
>>>
>>> Is this normal? Doesn't this leave the system in an inconsistent
>>> state? (For example on system shutdown).
>>>
>>> Should the init script be fixed? (maybe including "gluster volume
>>> stop" or something)?
>>>
>>> What's the best practice to terminate *all* Gluster related process
>>> (especially on system shutdown/reboot)?
>>>
>>> Thanks,
>>> Guido
>>> _______________________________________________
>>> Gluster-users mailing list
>>> Gluster-users at gluster.org
>>> http://supercolony.gluster.org/mailman/listinfo/gluster-users
>>>
>>
>>
>>
>> --
>> Jay Vyas
>> http://jayunit100.blogspot.com
>>
>>
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>>
>>
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>
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