Re: afr-self-heald.c:479:afr_shd_index_sweep

[Ravishankar N <ravishankar@xxxxxxxxxx>]

On 06/29/2017 01:08 PM, Paolo Margara wrote:

Hi all,

for the upgrade I followed this procedure:

• put node in maintenance mode (ensure no client are active)
• yum versionlock delete glusterfs*
  
• service glusterd stop
• yum update
• systemctl daemon-reload
  
• service glusterd start
• yum versionlock add glusterfs*
• gluster volume heal vm-images-repo full
• gluster volume heal vm-images-repo info

on each server every time I ran 'gluster --version' to confirm the upgrade, at the end I ran 'gluster volume set all cluster.op-version 30800'.

Today I've tried to manually kill a brick process on a non critical volume, after that into the log I see:

[2017-06-29 07:03:50.074388] I [MSGID: 100030] [glusterfsd.c:2454:main] 0-/usr/sbin/glusterfsd: Started running /usr/sbin/glusterfsd version 3.8.12 (args: /usr/sbin/glusterfsd -s virtnode-0-1-gluster --volfile-id iso-images-repo.virtnode-0-1-gluster.data-glusterfs-brick1b-iso-images-repo -p /var/lib/glusterd/vols/iso-images-repo/run/virtnode-0-1-gluster-data-glusterfs-brick1b-iso-images-repo.pid -S /var/run/gluster/c779852c21e2a91eaabbdda3b9127262.socket --brick-name /data/glusterfs/brick1b/iso-images-repo -l /var/log/glusterfs/bricks/data-glusterfs-brick1b-iso-images-repo.log --xlator-option *-posix.glusterd-uuid=e93ebee7-5d95-4100-a9df-4a3e60134b73 --brick-port 49163 --xlator-option iso-images-repo-server.listen-port=49163)

I've checked after the restart and indeed now the directory 'entry-changes' is created, but why stopping the glusterd service has not stopped also the brick processes?

Just stopping,upgrading and restarting glusterd does not restart the brick processes, You would need to kill all gluster processes on the node before upgrading.  After upgrading, when you restart glusterd, it will automatically spawn the rest of the gluster processes on that node.
 

Now how can I recover from this issue? Restarting all brick processes is enough?

Yes, but ensure there are no pending heals like Pranith mentioned. https://gluster.readthedocs.io/en/latest/Upgrade-Guide/upgrade_to_3.7/  lists the steps for upgrade to 3.7 but the steps mentioned there are similar for any rolling upgrade.

-Ravi

Greetings,

    Paolo Margara

Il 28/06/2017 18:41, Pranith Kumar Karampuri ha scritto:

On Wed, Jun 28, 2017 at 9:45 PM, Ravishankar N <ravishankar@xxxxxxxxxx> wrote:

On 06/28/2017 06:52 PM, Paolo Margara wrote:

Hi list,

yesterday I noted the following lines into the glustershd.log log file:

[2017-06-28 11:53:05.000890] W [MSGID: 108034]
[afr-self-heald.c:479:afr_shd_index_sweep]
0-iso-images-repo-replicate-0: unable to get index-dir on
iso-images-repo-client-0
[2017-06-28 11:53:05.001146] W [MSGID: 108034]
[afr-self-heald.c:479:afr_shd_index_sweep] 0-vm-images-repo-replicate-0:
unable to get index-dir on vm-images-repo-client-0
[2017-06-28 11:53:06.001141] W [MSGID: 108034]
[afr-self-heald.c:479:afr_shd_index_sweep] 0-hosted-engine-replicate-0:
unable to get index-dir on hosted-engine-client-0
[2017-06-28 11:53:08.001094] W [MSGID: 108034]
[afr-self-heald.c:479:afr_shd_index_sweep] 0-vm-images-repo-replicate-2:
unable to get index-dir on vm-images-repo-client-6
[2017-06-28 11:53:08.001170] W [MSGID: 108034]
[afr-self-heald.c:479:afr_shd_index_sweep] 0-vm-images-repo-replicate-1:
unable to get index-dir on vm-images-repo-client-3

Digging into the mailing list archive I've found another user with a
similar issue (the thread was ' glustershd: unable to get
index-dir on myvolume-client-0'), the solution suggested was to verify
if the  /<path-to-backend-brick>/.glusterfs/indices directory contains
all these sub directories: 'dirty', 'entry-changes' and 'xattrop' and if
some of them does not exists simply create it with mkdir.

In my case the 'entry-changes' directory is not present on all the
bricks and on all the servers:

/data/glusterfs/brick1a/hosted-engine/.glusterfs/indices/:
total 0
drw------- 2 root root 55 Jun 28 15:02 dirty
drw------- 2 root root 57 Jun 28 15:02 xattrop

/data/glusterfs/brick1b/iso-images-repo/.glusterfs/indices/:
total 0
drw------- 2 root root 55 May 29 14:04 dirty
drw------- 2 root root 57 May 29 14:04 xattrop

/data/glusterfs/brick2/vm-images-repo/.glusterfs/indices/:
total 0
drw------- 2 root root 112 Jun 28 15:02 dirty
drw------- 2 root root  66 Jun 28 15:02 xattrop

/data/glusterfs/brick3/vm-images-repo/.glusterfs/indices/:
total 0
drw------- 2 root root 64 Jun 28 15:02 dirty
drw------- 2 root root 66 Jun 28 15:02 xattrop

/data/glusterfs/brick4/vm-images-repo/.glusterfs/indices/:
total 0
drw------- 2 root root 112 Jun 28 15:02 dirty
drw------- 2 root root  66 Jun 28 15:02 xattrop

I've recently upgraded gluster from 3.7.16 to 3.8.12 with the rolling
upgrade procedure and I haven't noted this issue prior of the update, on
another system upgraded with the same procedure I haven't encountered
this problem.

Currently all VM images appear to be OK but prior to create the
'entry-changes' I would like to ask if this is still the correct
procedure to fix this issue

Did you restart the bricks after the upgrade? That should have created the entry-changes directory. Can you kill the brick and restart it and see if the dir is created? Double check from the brick logs that you're indeed running 3.12:  "Started running /usr/local/sbin/glusterfsd version 3.8.12" should appear when the brick starts.

Please note that if you are going the route of killing and restarting, you need to do it in the same way you did rolling upgrade. You need to wait for heal to complete before you kill the other nodes. But before you do this, it is better you look at the logs or confirm the steps you used for doing upgrade.

 

-Ravi

  and if this problem could have affected the
heal operations occurred meanwhile.

Thanks.


Greetings,

     Paolo Margara

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