Thomas,
You seems to be on right track, That is easiest way to replace brick without any hassle.
Here is the set of steps which I usually follow:
# mkdir -p /bricks/brick1 <--Mountpoint of new brick
# mkdir -p /bricks/brick1/.glusterfs/00/00
# cd /bricks/brick1/.glusterfs/00/00
# ln -s ../../.. 00000000-0000-0000-0000-000000000001
# ll should return this:
lrwxrwxrwx 1 root root <date> <time> 00000000-0000-0000-0000-000000000001 -> ../../..
# get the volume id from the replica pair of failed node
#getfattr -d -m. -e hex /bricks/brick2 ---> replica brick
trusted.glusterfs.volume-id= <volume id>
set the same vol id to new brick
#setfattr -n trusted.glusterfs.volume-id -v <volume id> /bricks/brick1
Verify it
#getfattr -d -m. -e hex /bricks/brick1
If volume is in stop state start the volume:
#gluster volume start VOLNAME
Check #gluster volume status to check new brick came online and have pid and portnumber
If brick is not online restart the volume:
#gluster volume stop VOLNAME force
#gluster volume start VOLNAME
Run full self-heal:
#gluster volume heal VOLNAME full
Compare the data from replica brick `/bricks/brick2` to this new brick `/bricks/brick1`, it should have same data.
Thanks,
Bipin Kunal
On Thu, Nov 5, 2015 at 9:55 PM, Thomas Bätzler <t.baetzler@xxxxxxxxxx> wrote:
Hi,
A small update: since nothing else worked, I broke down and changed the
replacement system's IP and hostname to that of the broken system;
replaced its UUID with that of the downed machine and probed it back
into the gluster cluster. Had to restart glusterd several times to make
the other systems pick up the change.
I then added the volume-id attr to the new bricks as suggested on
https://joejulian.name/blog/replacing-a-brick-on-glusterfs-340/. After
that I was able to trigger a manual heal. By tomorrow I may have some
kind of estimate of how long the repair is going to take.
Bye,
Thomas
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