[Gluster-users] replace brick in distributed-dispersed setup

[Ashish Pandey]

Hi Iñaki 

The steps you are following don't have any issue. 
I would like to have more information to debug this further. 

1 - gluster v info <volname> 
2 - gluster v status <volname> before and after running replace-brick 
3 - Brick logs (for this volume only) from /var/log/glusterfs/bricks/ 
4 - glusterd logs /var/log/glusterfs/ starts with "usr-local-etc-glusterfs-glusterd-<volname>" 

Although it should not matter, could you also try to replace a brick without killing that brick process? 

Ashish 

----- Original Message -----

From: "itlinux_team" <itlinux at imppc.org> 
To: gluster-users at gluster.org 
Sent: Wednesday, July 6, 2016 4:33:54 PM 
Subject: [Gluster-users] replace brick in distributed-dispersed setup 

Hi all, 

I'm doing some testings with glusterfs in a virtualized environment 
running a 3 x (8 + 4) distributed-dispersed volume simulating a 3 node 
cluster with 12 drives per node configuration. The system versions are: 

OS: Debian jessie kernel 3.16 

Gluster: 3.8.0-2 installed from the gluster.org debian repository 

I have tested the node failure scenario while some clients are running 
some read/write operations and the setup works as expected. Now I'm 
trying to test how to replace a faulty drive on this setup, however I'm 
not able to replace a brick. To test it I have: 

1: Find the pid of the brick I'd like to 'fail' and kill the process. 
(tried removing the drive from the host but that would make the whole 
guest unresponsive) 

2: Attach a new virtual drive, format and mount it 

3: Try the gluster volume replace-brick command 

And I'm getting the following error: 

gluster volume replace-brick vol_1 glusterserver1:/ext/bricks/brick-1 
glusterserver1:/ext/bricks/brick-13 commit force 
volume replace-brick: failed: Fuse unavailable 
Replace-brick failed 

I assume I'm doing something wrong but don't know what exactly. Looking 
in the documentation I have not found information about brick 
replacement in distributed-dispersed setups. 


Thanks! 

Iñaki 



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