On 11/06/19 9:11 PM, Alan Orth wrote:
Dear list,
In a recent discussion on this list Ravi suggested that the
documentation for replace-brick¹ was out of date. For a
distribute–replicate volume the documentation currently says that we
need to kill the old brick's PID, create a temporary empty directory
on the FUSE mount, check the xattrs, replace-brick with commit force.
Is all this still necessary? I'm running Gluster 5.6 on CentOS 7 with
a distribute–replicate volume.
No, all these very steps are 'codified' into the `replace brick commit
force` command via https://review.gluster.org/#/c/glusterfs/+/10076/ and
https://review.gluster.org/#/c/glusterfs/+/10448/. You can see the
commit messages of these 2 patches for more details.
You can play around with most of these commands in a 1 node setup if you
want to convince yourself that they work. There is no need to form a
cluster.
[root@tuxpad glusterfs]# gluster v create testvol replica 3
127.0.0.2:/home/ravi/bricks/brick{1..3} force
[root@tuxpad glusterfs]# gluster v start testvol
[root@tuxpad glusterfs]# mount -t glusterfs 127.0.0.2:testvol /mnt/fuse_mnt/
[root@tuxpad glusterfs]# touch /mnt/fuse_mnt/FILE
[root@tuxpad glusterfs]# ll /home/ravi/bricks/brick*/FILE
-rw-r--r--. 2 root root 0 Jun 11 21:55 /home/ravi/bricks/brick1/FILE
-rw-r--r--. 2 root root 0 Jun 11 21:55 /home/ravi/bricks/brick2/FILE
-rw-r--r--. 2 root root 0 Jun 11 21:55 /home/ravi/bricks/brick3/FILE
[root@tuxpad glusterfs]# gluster v replace-brick testvol
127.0.0.2:/home/ravi/bricks/brick3
127.0.0.2:/home/ravi/bricks/brick3_new commit force
volume replace-brick: success: replace-brick commit force operation
successful
[root@tuxpad glusterfs]# ll /home/ravi/bricks/brick3_new/FILE
-rw-r--r--. 2 root root 0 Jun 11 21:55 /home/ravi/bricks/brick3_new/FILE
Why don't you send a patch to update the doc for replace-brick? I'd be
happy to review it. ;-)
HTH,
Ravi
Thank you,
¹ https://docs.gluster.org/en/latest/Administrator Guide/Managing Volumes/
--
Alan Orth
alan.o...@gmail.com <mailto:alan.o...@gmail.com>
https://picturingjordan.com
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"In heaven all the interesting people are missing." ―Friedrich Nietzsche
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