Re: Files not healing & missing their extended attributes - Help!

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Hi Karthik,
 Many thanks for the response!

On 4 July 2018 at 05:26, Karthik Subrahmanya <ksubrahm@xxxxxxxxxx> wrote:
Hi,

From the logs you have pasted it looks like those files are in GFID split-brain.
They should have the GFIDs assigned on both the data bricks but they will be different.

Can you please paste the getfattr output of those files and their parent from all the bricks again?

The files don't have any attributes set, however I did manage to find their corresponding entries in .glusterfs

==================================
[root@v0 .glusterfs]# getfattr -m . -d -e hex /gluster/engine/brick/98495dbc-a29c-4893-b6a0-0aa70860d0c9/ha_agent
getfattr: Removing leading '/' from absolute path names
# file: gluster/engine/brick/98495dbc-a29c-4893-b6a0-0aa70860d0c9/ha_agent
security.selinux=0x73797374656d5f753a6f626a6563745f723a756e6c6162656c65645f743a733000
trusted.afr.dirty=0x000000000000000000000000
trusted.afr.engine-client-2=0x0000000000000000000024ea
trusted.gfid=0xdb9afb92d2bc49ed8e34dcd437ba7be2
trusted.glusterfs.dht=0x000000010000000000000000ffffffff

[root@v0 .glusterfs]# getfattr -m . -d -e hex /gluster/engine/brick/98495dbc-a29c-4893-b6a0-0aa70860d0c9/ha_agent/*
getfattr: Removing leading '/' from absolute path names
# file: gluster/engine/brick/98495dbc-a29c-4893-b6a0-0aa70860d0c9/ha_agent/hosted-engine.lockspace
security.selinux=0x73797374656d5f753a6f626a6563745f723a6675736566735f743a733000

# file: gluster/engine/brick/98495dbc-a29c-4893-b6a0-0aa70860d0c9/ha_agent/hosted-engine.metadata
security.selinux=0x73797374656d5f753a6f626a6563745f723a6675736566735f743a733000

[root@v0 .glusterfs]# ls -l /gluster/engine/brick/.glusterfs/db/9a/db9afb92-d2bc-49ed-8e34-dcd437ba7be2/
total 0
lrwxrwxrwx. 2 vdsm kvm 132 Jun 30 14:55 hosted-engine.lockspace -> /var/run/vdsm/storage/98495dbc-a29c-4893-b6a0-0aa70860d0c9/2502aff4-6c67-4643-b681-99f2c87e793d/03919182-6be2-4cbc-aea2-b9d68422a800
lrwxrwxrwx. 2 vdsm kvm 132 Jun 30 14:55 hosted-engine.metadata -> /var/run/vdsm/storage/98495dbc-a29c-4893-b6a0-0aa70860d0c9/99510501-6bdc-485a-98e8-c2f82ff8d519/71fa7e6c-cdfb-4da8-9164-2404b518d0ee

==================================

Again, here are the relevant client log entries:

[2018-07-03 19:09:29.245089] W [MSGID: 108008] [afr-self-heal-name.c:354:afr_selfheal_name_gfid_mismatch_check] 0-engine-replicate-0: GFID mismatch for <gfid:db9afb92-d2bc-49ed-8e34-dcd437ba7be2>/hosted-engine.metadata 5e95ba8c-2f12-49bf-be2d-b4baf210d366 on engine-client-1 and b9cd7613-3b96-415d-a549-1dc788a4f94d on engine-client-0
[2018-07-03 19:09:29.245585] W [fuse-bridge.c:471:fuse_entry_cbk] 0-glusterfs-fuse: 10430040: LOOKUP() /98495dbc-a29c-4893-b6a0-0aa70860d0c9/ha_agent/hosted-engine.metadata => -1 (Input/output error)
[2018-07-03 19:09:30.619000] W [MSGID: 108008] [afr-self-heal-name.c:354:afr_selfheal_name_gfid_mismatch_check] 0-engine-replicate-0: GFID mismatch for <gfid:db9afb92-d2bc-49ed-8e34-dcd437ba7be2>/hosted-engine.lockspace 8e86902a-c31c-4990-b0c5-0318807edb8f on engine-client-1 and e5899a4c-dc5d-487e-84b0-9bbc73133c25 on engine-client-0
[2018-07-03 19:09:30.619360] W [fuse-bridge.c:471:fuse_entry_cbk] 0-glusterfs-fuse: 10430656: LOOKUP() /98495dbc-a29c-4893-b6a0-0aa70860d0c9/ha_agent/hosted-engine.lockspace => -1 (Input/output error)

[root@v0 .glusterfs]# find . -type f | grep -E "5e95ba8c-2f12-49bf-be2d-b4baf210d366|8e86902a-c31c-4990-b0c5-0318807edb8f|b9cd7613-3b96-415d-a549-1dc788a4f94d|e5899a4c-dc5d-487e-84b0-9bbc73133c25"
[root@v0 .glusterfs]#

==================================
 
Which version of gluster you are using?

3.8.5
An upgrade is on the books, however I had to go back on my last attempt as 3.12 didn't work with 3.8 & I was unable to do a live rolling upgrade. Once I've got this GFID mess sorted out, I'll give a full upgrade a go as I've already had to failover this cluster's services to another cluster.

If you are using a version higher than or equal to 3.12 gfid split brains can be resolved using the methods (except method 4)
explained in the "Resolution of split-brain using gluster CLI" section in [1].
Also note that for gfid split-brain resolution using CLI you have to pass the name of the file as argument and not the GFID.

If it is lower than 3.12 (Please consider upgrading them since they are EOL) you have to resolve it manually as explained in [2]


"The user needs to remove either file '1' on brick-a or the file '1' on brick-b to resolve the split-brain. In addition, the corresponding gfid-link file also needs to be removed."

Okay, so as you can see above, the files don't have a trusted.gfid attribute, & on the brick I didn't find any files in .glusterfs with the same name as the GFID's reported in the client log. I did however find the symlinked files in a .glusterfs directory under the parent directory's GFID.
 
[root@v0 .glusterfs]# ls -l /gluster/engine/brick/.glusterfs/db/9a/db9afb92-d2bc-49ed-8e34-dcd437ba7be2/
total 0
lrwxrwxrwx. 2 vdsm kvm 132 Jun 30 14:55 hosted-engine.lockspace -> /var/run/vdsm/storage/98495dbc-a29c-4893-b6a0-0aa70860d0c9/2502aff4-6c67-4643-b681-99f2c87e793d/03919182-6be2-4cbc-aea2-b9d68422a800
lrwxrwxrwx. 2 vdsm kvm 132 Jun 30 14:55 hosted-engine.metadata -> /var/run/vdsm/storage/98495dbc-a29c-4893-b6a0-0aa70860d0c9/99510501-6bdc-485a-98e8-c2f82ff8d519/71fa7e6c-cdfb-4da8-9164-2404b518d0ee

So if I delete those two symlinks & the files they point to, on one of the two bricks, will that resolve the split brain? Is that correct?


Thanks & Regards,
Karthik

On Wed, Jul 4, 2018 at 1:59 AM Gambit15 <dougti+gluster@xxxxxxxxx> wrote:
On 1 July 2018 at 22:37, Ashish Pandey <aspandey@xxxxxxxxxx> wrote:

The only problem at the moment is that arbiter brick offline. You should only bother about completion of maintenance of arbiter brick ASAP.
Bring this brick UP, start FULL heal or index heal and the volume will be in healthy state.

Doesn't the arbiter only resolve split-brain situations? None of the files that have been marked for healing are marked as in split-brain.

The arbiter has now been brought back up, however the problem continues.

I've found the following information in the client log:

[2018-07-03 19:09:29.245089] W [MSGID: 108008] [afr-self-heal-name.c:354:afr_selfheal_name_gfid_mismatch_check] 0-engine-replicate-0: GFID mismatch for <gfid:db9afb92-d2bc-49ed-8e34-dcd437ba7be2>/hosted-engine.metadata 5e95ba8c-2f12-49bf-be2d-b4baf210d366 on engine-client-1 and b9cd7613-3b96-415d-a549-1dc788a4f94d on engine-client-0
[2018-07-03 19:09:29.245585] W [fuse-bridge.c:471:fuse_entry_cbk] 0-glusterfs-fuse: 10430040: LOOKUP() /98495dbc-a29c-4893-b6a0-0aa70860d0c9/ha_agent/hosted-engine.metadata => -1 (Input/output error)
[2018-07-03 19:09:30.619000] W [MSGID: 108008] [afr-self-heal-name.c:354:afr_selfheal_name_gfid_mismatch_check] 0-engine-replicate-0: GFID mismatch for <gfid:db9afb92-d2bc-49ed-8e34-dcd437ba7be2>/hosted-engine.lockspace 8e86902a-c31c-4990-b0c5-0318807edb8f on engine-client-1 and e5899a4c-dc5d-487e-84b0-9bbc73133c25 on engine-client-0
[2018-07-03 19:09:30.619360] W [fuse-bridge.c:471:fuse_entry_cbk] 0-glusterfs-fuse: 10430656: LOOKUP() /98495dbc-a29c-4893-b6a0-0aa70860d0c9/ha_agent/hosted-engine.lockspace => -1 (Input/output error)

As you can see from the logs I posted previously, neither of those two files, on either of the two servers, have any of gluster's extended attributes set.

The arbiter doesn't have any record of the files in question, as they were created after it went offline.

How do I fix this? Is it possible to locate the correct gfids somewhere & redefine them on the files manually?

Cheers,
 Doug

From: "Gambit15" <dougti+gluster@xxxxxxxxx>
To: "Ashish Pandey" <aspandey@xxxxxxxxxx>
Cc: "gluster-users" <gluster-users@xxxxxxxxxxx>
Sent: Monday, July 2, 2018 1:45:01 AM
Subject: Re: Files not healing & missing their extended attributes - Help!


Hi Ashish,

The output is below. It's a rep 2+1 volume. The arbiter is offline for maintenance at the moment, however quorum is met & no files are reported as in split-brain (it hosts VMs, so files aren't accessed concurrently).

======================
[root@v0 glusterfs]# gluster volume info engine

Volume Name: engine
Type: Replicate
Volume ID: 279737d3-3e5a-4ee9-8d4a-97edcca42427
Status: Started
Snapshot Count: 0
Number of Bricks: 1 x (2 + 1) = 3
Transport-type: tcp
Bricks:
Brick1: s0:/gluster/engine/brick
Brick2: s1:/gluster/engine/brick
Brick3: s2:/gluster/engine/arbiter (arbiter)
Options Reconfigured:
nfs.disable: on
performance.readdir-ahead: on
transport.address-family: inet
performance.quick-read: off
performance.read-ahead: off
performance.io-cache: off
performance.stat-prefetch: off
cluster.eager-lock: enable
network.remote-dio: enable
cluster.quorum-type: auto
cluster.server-quorum-type: server
storage.owner-uid: 36
storage.owner-gid: 36
performance.low-prio-threads: 32

======================

[root@v0 glusterfs]# gluster volume heal engine info
Brick s0:/gluster/engine/brick
/__DIRECT_IO_TEST__
/98495dbc-a29c-4893-b6a0-0aa70860d0c9/ha_agent
/98495dbc-a29c-4893-b6a0-0aa70860d0c9
<LIST TRUNCATED FOR BREVITY>
Status: Connected
Number of entries: 34

Brick s1:/gluster/engine/brick
<SAME AS ABOVE - TRUNCATED FOR BREVITY>
Status: Connected
Number of entries: 34

Brick s2:/gluster/engine/arbiter
Status: Ponto final de transporte não está conectado
Number of entries: -

======================
=== PEER V0 ===

[root@v0 glusterfs]# getfattr -m . -d -e hex /gluster/engine/brick/98495dbc-a29c-4893-b6a0-0aa70860d0c9/ha_agent
getfattr: Removing leading '/' from absolute path names
# file: gluster/engine/brick/98495dbc-a29c-4893-b6a0-0aa70860d0c9/ha_agent
security.selinux=0x73797374656d5f753a6f626a6563745f723a756e6c6162656c65645f743a733000
trusted.afr.dirty=0x000000000000000000000000
trusted.afr.engine-client-2=0x0000000000000000000024e8
trusted.gfid=0xdb9afb92d2bc49ed8e34dcd437ba7be2
trusted.glusterfs.dht=0x000000010000000000000000ffffffff

[root@v0 glusterfs]# getfattr -m . -d -e hex /gluster/engine/brick/98495dbc-a29c-4893-b6a0-0aa70860d0c9/ha_agent/*
getfattr: Removing leading '/' from absolute path names
# file: gluster/engine/brick/98495dbc-a29c-4893-b6a0-0aa70860d0c9/ha_agent/hosted-engine.lockspace
security.selinux=0x73797374656d5f753a6f626a6563745f723a6675736566735f743a733000

# file: gluster/engine/brick/98495dbc-a29c-4893-b6a0-0aa70860d0c9/ha_agent/hosted-engine.metadata
security.selinux=0x73797374656d5f753a6f626a6563745f723a6675736566735f743a733000

=== PEER V1 ===

[root@v1 glusterfs]# getfattr -m . -d -e hex /gluster/engine/brick/98495dbc-a29c-4893-b6a0-0aa70860d0c9/ha_agent
getfattr: Removing leading '/' from absolute path names
# file: gluster/engine/brick/98495dbc-a29c-4893-b6a0-0aa70860d0c9/ha_agent
security.selinux=0x73797374656d5f753a6f626a6563745f723a756e6c6162656c65645f743a733000
trusted.afr.dirty=0x000000000000000000000000
trusted.afr.engine-client-2=0x0000000000000000000024ec
trusted.gfid=0xdb9afb92d2bc49ed8e34dcd437ba7be2
trusted.glusterfs.dht=0x000000010000000000000000ffffffff

======================

cmd_history.log-20180701:

[2018-07-01 03:11:38.461175]  : volume heal engine full : SUCCESS
[2018-07-01 03:11:51.151891]  : volume heal data full : SUCCESS

glustershd.log-20180701:
<LOGS FROM 06/01 TRUNCATED>
[2018-07-01 07:15:04.779122] I [MSGID: 100011] [glusterfsd.c:1396:reincarnate] 0-glusterfsd: Fetching the volume file from server...

glustershd.log:
[2018-07-01 07:15:04.779693] I [glusterfsd-mgmt.c:1596:mgmt_getspec_cbk] 0-glusterfs: No change in volfile, continuing

That's the *only* message in glustershd.log today.

======================

[root@v0 glusterfs]# gluster volume status engine
Status of volume: engine
Gluster process                             TCP Port  RDMA Port  Online  Pid
------------------------------------------------------------------------------
Brick s0:/gluster/engine/brick              49154     0          Y       2816
Brick s1:/gluster/engine/brick              49154     0          Y       3995
Self-heal Daemon on localhost               N/A       N/A        Y       2919
Self-heal Daemon on s1                      N/A       N/A        Y       4013

Task Status of Volume engine
------------------------------------------------------------------------------
There are no active volume tasks

======================

Okay, so actually only the directory ha_agent is listed for healing (not its contents), & that does have attributes set.

Many thanks for the reply!


On 1 July 2018 at 15:34, Ashish Pandey <aspandey@xxxxxxxxxx> wrote:
You have not even talked about the volume type and configuration and this issue would require lot of other information to fix it.

1 - What is the type of volume and config.
2 - Provide the gluster v <volname> info out put
3 - Heal info out put
4 - getxattr of one of the file, which needs healing, from all the bricks.
5 - What lead to the healing of file?
6 - gluster v <volname> status
7 - glustershd.log out put just after you run full heal or index heal

----
Ashish

From: "Gambit15" <dougti+gluster@xxxxxxxxx>
To: "gluster-users" <gluster-users@xxxxxxxxxxx>
Sent: Sunday, July 1, 2018 11:50:16 PM
Subject: Files not healing & missing their extended        attributes - Help!


Hi Guys,
 I had to restart our datacenter yesterday, but since doing so a number of the files on my gluster share have been stuck, marked as healing. After no signs of progress, I manually set off a full heal last night, but after 24hrs, nothing's happened.

The gluster logs all look normal, and there're no messages about failed connections or heal processes kicking off.

I checked the listed files' extended attributes on their bricks today, and they only show the selinux attribute. There's none of the trusted.* attributes I'd expect.
The healthy files on the bricks do have their extended attributes though.

I'm guessing that perhaps the files somehow lost their attributes, and gluster is no longer able to work out what to do with them? It's not logged any errors, warnings, or anything else out of the normal though, so I've no idea what the problem is or how to resolve it.

I've got 16 hours to get this sorted before the start of work, Monday. Help!

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http://lists.gluster.org/mailman/listinfo/gluster-users

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