On Thu, Dec 8, 2016 at 11:17 PM, Pranith Kumar Karampuri <pkarampu@xxxxxxxxxx> wrote:
Oh this is addition of bricks?
Just do the following:
1) Bring the new brick down by killing it.
2) On the root of the mount directory(Let's call it /mnt) do:
mkdir /mnt/<name-of-nonexistent-dir>
rmdir /mnt/<name-of-nonexistent-dir>
setfattr -n trusted.non-existent-key -v abc /mnt
setfattr -x trusted.non-existent-key /mnt
3) Start the volume using: "gluster volume start <volname> force"
This will trigger the heal which will make sure everything is healed and the application will only see the correct data.
On Thu, Dec 8, 2016 at 10:22 PM, Ravishankar N <ravishankar@xxxxxxxxxx> wrote:On 12/08/2016 09:44 PM, Miloš Čučulović - MDPI wrote:
I was able to fix the sync by rsync-ing all the directories, then the hale started. The next problem :), as soon as there are files on the new brick, the gluster mount will render also this one for mounts, and the new brick is not ready yet, as the sync is not yet done, so it results on missing files on client side. I temporary removed the new brick, now I am running a manual rsync and will add the brick again, hope this could work.This mechanism was introduced in 3.7.9 or 3.7.10 (http://review.gluster.org/#/c
What mechanism is managing this issue, I guess there is something per built to make a replica brick available only once the data is completely synced.
/13806/ ). Before that version, you manually needed to set some xattrs on the bricks so that healing could happen in parallel while the client still would server reads from the original brick. I can't find the link to the doc which describes these steps for setting xattrs.:-(
Just do the following:
1) Bring the new brick down by killing it.
2) On the root of the mount directory(Let's call it /mnt) do:
mkdir /mnt/<name-of-nonexistent-dir>
rmdir /mnt/<name-of-nonexistent-dir>
setfattr -n trusted.non-existent-key -v abc /mnt
setfattr -x trusted.non-existent-key /mnt
3) Start the volume using: "gluster volume start <volname> force"
This will trigger the heal which will make sure everything is healed and the application will only see the correct data.
Since you did an explicit rsync, there is no gurantee that things should work as expected. We will be adding the steps above to documentation.
Calling it a day,
Ravi
- Kindest regards,
Milos Cuculovic
IT Manager
---
MDPI AG
Postfach, CH-4020 Basel, Switzerland
Office: St. Alban-Anlage 66, 4052 Basel, Switzerland
Tel. +41 61 683 77 35
Fax +41 61 302 89 18
Email: cuculovic@xxxxxxxx
Skype: milos.cuculovic.mdpi
On 08.12.2016 16:17, Ravishankar N wrote:
On 12/08/2016 06:53 PM, Atin Mukherjee wrote:
1. Are the files getting created on the new brick though?
On Thu, Dec 8, 2016 at 6:44 PM, Miloš Čučulović - MDPI
<cuculovic@xxxxxxxx <mailto:cuculovic@xxxxxxxx>> wrote:
Ah, damn! I found the issue. On the storage server, the storage2
IP address was wrong, I inversed two digits in the /etc/hosts
file, sorry for that :(
I was able to add the brick now, I started the heal, but still no
data transfer visible.
2. Can you provide the output of `getfattr -d -m . -e hex
/data/data-cluster` on both bricks?
3. Is it possible to attach gdb to the self-heal daemon on the original
(old) brick and get a backtrace?
`gdb -p <pid of self-heal daemon on the orignal brick>`
thread apply all bt -->share this output
quit gdb.
-Ravi
@Ravi/Pranith - can you help here?
By doing gluster volume status, I have
Status of volume: storage
Gluster process TCP Port RDMA Port Online Pid
------------------------------------------------------------ ------------------
Brick storage2:/data/data-cluster 49152 0 Y
23101
Brick storage:/data/data-cluster 49152 0 Y
30773
Self-heal Daemon on localhost N/A N/A Y
30050
Self-heal Daemon on storage N/A N/A Y
30792
Any idea?
On storage I have:
Number of Peers: 1
Hostname: 195.65.194.217
Uuid: 7c988af2-9f76-4843-8e6f-d94866d57bb0
State: Peer in Cluster (Connected)
- Kindest regards,
Milos Cuculovic
IT Manager
---
MDPI AG
Postfach, CH-4020 Basel, Switzerland
Office: St. Alban-Anlage 66, 4052 Basel, Switzerland
Tel. +41 61 683 77 35
Fax +41 61 302 89 18
Email: cuculovic@xxxxxxxx <mailto:cuculovic@xxxxxxxx>
Skype: milos.cuculovic.mdpi
On 08.12.2016 13:55, Atin Mukherjee wrote:
Can you resend the attachment as zip? I am unable to extract the
content? We shouldn't have 0 info file. What does gluster peer
status
output say?
On Thu, Dec 8, 2016 at 4:51 PM, Miloš Čučulović - MDPI
<cuculovic@xxxxxxxx <mailto:cuculovic@xxxxxxxx>
<mailto:cuculovic@xxxxxxxx <mailto:cuculovic@xxxxxxxx>>> wrote:
I hope you received my last email Atin, thank you!
- Kindest regards,
Milos Cuculovic
IT Manager
---
MDPI AG
Postfach, CH-4020 Basel, Switzerland
Office: St. Alban-Anlage 66, 4052 Basel, Switzerland
Tel. +41 61 683 77 35
Fax +41 61 302 89 18
Email: cuculovic@xxxxxxxx <mailto:cuculovic@xxxxxxxx>
<mailto:cuculovic@xxxxxxxx <mailto:cuculovic@xxxxxxxx>>
Skype: milos.cuculovic.mdpi
On 08.12.2016 10:28, Atin Mukherjee wrote:
---------- Forwarded message ----------
From: *Atin Mukherjee* <amukherj@xxxxxxxxxx
<mailto:amukherj@xxxxxxxxxx>
<mailto:amukherj@xxxxxxxxxx
<mailto:amukherj@xxxxxxxxxx>> <mailto:amukherj@xxxxxxxxxx
<mailto:amukherj@xxxxxxxxxx>
<mailto:amukherj@xxxxxxxxxx
<mailto:amukherj@xxxxxxxxxx>>>>
Date: Thu, Dec 8, 2016 at 11:56 AM
Subject: Re: [Gluster-users] Replica brick not working
To: Ravishankar N <ravishankar@xxxxxxxxxx
<mailto:ravishankar@xxxxxxxxxx>
<mailto:ravishankar@xxxxxxxxxx
<mailto:ravishankar@xxxxxxxxxx>>
<mailto:ravishankar@xxxxxxxxxx <mailto:ravishankar@xxxxxxxxxx>
<mailto:ravishankar@xxxxxxxxxx
<mailto:ravishankar@xxxxxxxxxx>>>>
Cc: Miloš Čučulović - MDPI <cuculovic@xxxxxxxx
<mailto:cuculovic@xxxxxxxx>
<mailto:cuculovic@xxxxxxxx <mailto:cuculovic@xxxxxxxx>>
<mailto:cuculovic@xxxxxxxx <mailto:cuculovic@xxxxxxxx>
<mailto:cuculovic@xxxxxxxx <mailto:cuculovic@xxxxxxxx>>>>,
Pranith Kumar Karampuri
<pkarampu@xxxxxxxxxx <mailto:pkarampu@xxxxxxxxxx>
<mailto:pkarampu@xxxxxxxxxx <mailto:pkarampu@xxxxxxxxxx>>
<mailto:pkarampu@xxxxxxxxxx
<mailto:pkarampu@xxxxxxxxxx> <mailto:pkarampu@xxxxxxxxxx
<mailto:pkarampu@xxxxxxxxxx>>>>,
gluster-users
<gluster-users@xxxxxxxxxxx
<mailto:gluster-users@gluster.org >
<mailto:gluster-users@gluster.org
<mailto:gluster-users@gluster.org >>
<mailto:gluster-users@gluster.org
<mailto:gluster-users@gluster.org >
<mailto:gluster-users@gluster.org
<mailto:gluster-users@gluster.org >>>>
On Thu, Dec 8, 2016 at 11:11 AM, Ravishankar N
<ravishankar@xxxxxxxxxx
<mailto:ravishankar@xxxxxxxxxx> <mailto:ravishankar@xxxxxxxxxx
<mailto:ravishankar@xxxxxxxxxx>>
<mailto:ravishankar@xxxxxxxxxx
<mailto:ravishankar@xxxxxxxxxx> <mailto:ravishankar@xxxxxxxxxx
<mailto:ravishankar@xxxxxxxxxx>>>>
wrote:
On 12/08/2016 10:43 AM, Atin Mukherjee wrote:
>From the log snippet:
[2016-12-07 09:15:35.677645] I [MSGID: 106482]
[glusterd-brick-ops.c:442:__glusterd_handle_add_brick]
0-management: Received add brick req
[2016-12-07 09:15:35.677708] I [MSGID: 106062]
[glusterd-brick-ops.c:494:__glusterd_handle_add_brick]
0-management: replica-count is 2
[2016-12-07 09:15:35.677735] E [MSGID: 106291]
[glusterd-brick-ops.c:614:__glusterd_handle_add_brick]
0-management:
The last log entry indicates that we hit the
code path in
gd_addbr_validate_replica_count ()
if (replica_count ==
volinfo->replica_count) {
if (!(total_bricks %
volinfo->dist_leaf_count)) {
ret = 1;
goto out;
}
}
It seems unlikely that this snippet was hit
because we print
the E
[MSGID: 106291] in the above message only if ret==-1.
gd_addbr_validate_replica_count() returns -1 and
yet not
populates
err_str only when in volinfo->type doesn't match
any of the
known
volume types, so volinfo->type is corrupted perhaps?
You are right, I missed that ret is set to 1 here in
the above
snippet.
@Milos - Can you please provide us the volume info
file from
/var/lib/glusterd/vols/<volname>/ from all the three
nodes to
continue
the analysis?
-Ravi
@Pranith, Ravi - Milos was trying to convert a
dist (1 X 1)
volume to a replicate (1 X 2) using add brick
and hit
this issue
where add-brick failed. The cluster is
operating with 3.7.6.
Could you help on what scenario this code path
can be
hit? One
straight forward issue I see here is missing
err_str in
this path.
--
~ Atin (atinm)
--
~ Atin (atinm)
--
~ Atin (atinm)
--
~ Atin (atinm)
--Pranith
--
Pranith
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