[Gluster-users] How to replace a dead brick? (3.6.5)

Humble Devassy Chirammal
2015-10-08T07:10:09Z

The steps for replacing the brick is documented and available @
http://gluster.readthedocs.org/en/latest/Administrator%20Guide/Managing%20Volumes/.
Hope it helps.
On Oct 7, 2015 12:36 PM, "Lindsay Mathieson" <lindsay.mathieson at
gmail.com>
wrote:

> First up - one of the things that concerns me re gluster is the incoherent
> state of documentation. The only docs linked on the main webpage are for
> 3.2 and there is almost nothing on how to handle failure modes such as dead
> disks/bricks etc, which is one of glusters primary functions.
>
> My problem - I have a replica 2 volume, 2 nodes, 2 bricks (zfs datasets).
>
> As a test, I destroyed one brick (zfs destroy the dataset).
>
>
> Can't start the datastore1:
>
>   volume start: datastore1: failed: Failed to find brick directory
> /glusterdata/datastore1 for volume datastore1. Reason : No such file or
> directory
>
> A bit disturbing, I was hoping it would work off the remaining brick.
>
> Can't replace the brick:
>
>   gluster volume replace-brick datastore1
> vnb.proxmox.softlog:/glusterdata/datastore1
> vnb.proxmox.softlog:/glusterdata/datastore1-2 commit force
>
> because the store is not running.
>
> After a lot of googling I found list messages referencing the remove brick
> command:
> gluster volume remove-brick datastore1 replica 2
> vnb.proxmox.softlog:/glusterdata/datastore1c commit force
>
> Fails with the unhelpful error:
>
> wrong brick type: commit, use <HOSTNAME>:<export-dir-abs-path>
> Usage: volume remove-brick <VOLNAME> [replica <COUNT>]
<BRICK> ...
> <start|stop|status|commit|force>
>
> In the end I destroyed and recreated the volume so I could resume testing,
> but I have no idea how I would handle a real failed brick in the future
>
> --
> Lindsay
>
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