[Gluster-users] self-heal failed

[Liang Ma]

Hi Brian,

Thanks for your further explanation. Myself actually just proved that
option 1 works for a totally damaged brick.
 For option 2, is this UUID for the peer host? Because I found in my peer
servers, each hosts's /var/lib/glusterd/glusterd.info holds the UUID stored
from the directory /var/lib/glusterd/peers/ of other peer host.

Liang
 <http://glusterd.info>


On Thu, Jan 10, 2013 at 5:06 PM, Brian Candler <B.Candler at pobox.com> wrote:

> On Thu, Jan 10, 2013 at 12:50:48PM -0500, Liang Ma wrote:
> >    I assume to replace a failed replicate disk or node should be a
> >    standard procedure, isn't it? I could find anything related to this in
> >    the 3.3 manual.
>
> You'd have thought so, wouldn't you :-(
>
> I know of two options.
>
> (1) If the server itself is OK, but the brick filesystem you're exporting
> from that server has died, then just stop glusterd, erase (mkfs) the
> filesystem which the brick is on, remount it, restart glusterd.
>
> After a few minutes, self-heal will kick in and copy the data for
> replicated
> volumes. At least, it did in a test setup I tried once.
>
> This of course assumes your data filesystem is separate from your OS
> filesystem, which I'd suggest is a good idea anyway.
>
> (2) If the whole server has died, or you have to re-install the OS from
> scratch, but the replacement server has the same hostname as the old one,
> then there's a different procedure.
>
> It was documented at
>
> http://gluster.org/community/documentation/index.php/Gluster_3.2:_Brick_Restoration_-_Replace_Crashed_Server
> for glusterfs 3.2. It is almost the same for glusterfs 3.3, but the config
> directory has moved. It works if you change these two steps:
>
> grep server3 /var/lib/glusterd/peers/*
>
> echo UUID=... >/var/lib/glusterd/glusterd.info
>
> HTH,
>
> Brian.
>
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