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Hello and thank you for your email. <br>
Actually no, i didn't check the gfid of the vms. <br>
If this will help, i can setup a new test cluster and get all the data you need.</p>
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Get <a href="https://aka.ms/ghei36">Outlook for Android</a></p>
<br>
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From: Nithya Balachandran<br>
Sent: Monday, March 20, 20:57<br>
Subject: Re: [Gluster-users] Gluster 3.8.10 rebalance VMs corruption<br>
To: Krutika Dhananjay<br>
Cc: Mahdi Adnan, Gowdappa, Raghavendra, Susant Palai, gluster-users@gluster.org List<br>
</p>
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Hi, <br>
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Do you know the GFIDs of the VM images which were corrupted?<br>
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Regards,</p>
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Nithya<br>
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On 20 March 2017 at 20:37, Krutika Dhananjay <<a href="mailto:kdhananj@redhat.com">kdhananj@redhat.com</a>> wrote:</p>
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I looked at the logs.</p>
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>From the time the new graph (since the add-brick command you shared where bricks 41 through 44 are added) is switched to (line 3011 onwards in nfs-gfapi.log), I see the following kinds of errors:</p>
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1. Lookups to a bunch of files failed with ENOENT on both replicas which protocol/client converts to ESTALE. I am guessing these entries got migrated to</p>
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other subvolumes leading to 'No such file or directory' errors.</p>
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DHT and thereafter shard get the same error code and log the following:</p>
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0 [2017-03-17 14:04:26.353444] E [MSGID: 109040] [dht-helper.c:1198:dht_migration_complete_check_task] 17-vmware2-dht: <gfid:a68ce411-e381-46a3-93cd-d2af6a7c3532>: failed to lookup the file on vmware2-dht [Stale file handle]
<br>
1 [2017-03-17 14:04:26.353528] E [MSGID: 133014] [shard.c:1253:shard_common_stat_cbk] 17-vmware2-shard: stat failed: a68ce411-e381-46a3-93cd-d2af6a7c3532 [Stale file handle]</p>
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which is fine.</p>
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2. The other kind are from AFR logging of possible split-brain which I suppose are harmless too.<br>
[2017-03-17 14:23:36.968883] W [MSGID: 108008] [afr-read-txn.c:228:afr_read_txn] 17-vmware2-replicate-13: Unreadable subvolume -1 found with event generation 2 for gfid 74d49288-8452-40d4-893e-ff4672557ff9. (Possible split-brain)</p>
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Since you are saying the bug is hit only on VMs that are undergoing IO while rebalance is running (as opposed to those that remained powered off),</p>
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rebalance + IO could be causing some issues.</p>
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CC'ing DHT devs</p>
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Raghavendra/Nithya/Susant,</p>
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Could you take a look?</p>
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-Krutika<br>
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On Sun, Mar 19, 2017 at 4:55 PM, Mahdi Adnan <<a href="mailto:mahdi.adnan@outlook.com">mahdi.adnan@outlook.com</a>> wrote:</p>
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Thank you for your email mate.<br>
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Yes, im aware of this but, to save costs i chose replica 2, this cluster is all flash.</p>
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In version 3.7.x i had issues with ping timeout, if one hosts went down for few seconds the whole cluster hangs and become unavailable, to avoid this i adjusted the ping timeout to 5 seconds.</p>
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As for choosing Ganesha over gfapi, VMWare does not support Gluster (FUSE or gfapi) im stuck with NFS for this volume.</p>
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The other volume is mounted using gfapi in oVirt cluster.</p>
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<font color="#000000"><font color="#3366ff">Respectfully</font></font><br>
<font color="#000000"><font color="#3366ff"><b>Mahdi A. Mahdi</b></font></font></p>
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<b><font color="#000000">From:</font></b><font color="#000000"> Krutika Dhananjay <</font><font color="#000000"><a href="mailto:kdhananj@redhat.com">kdhananj@redhat.com</a></font><font color="#000000">></font><br>
<font color="#000000"><b>Sent:</b></font><font color="#000000"> Sunday, March 19, 2017 2:01:49 PM
</font><br>
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<b>To:</b> Mahdi Adnan<br>
<b>Cc:</b> <a href="mailto:gluster-users@gluster.org">gluster-users@gluster.org</a><br>
<b>Subject:</b> Re: [Gluster-users] Gluster 3.8.10 rebalance VMs corruption</p>
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While I'm still going through the logs, just wanted to point out a couple of things:</p>
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1. It is recommended that you use 3-way replication (replica count 3) for VM store use case</p>
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2. network.ping-timeout at 5 seconds is way too low. Please change it to 30.</p>
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Is there any specific reason for using NFS-Ganesha over gfapi/FUSE?<br>
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Will get back with anything else I might find or more questions if I have any.</p>
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-Krutika<br>
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On Sun, Mar 19, 2017 at 2:36 PM, Mahdi Adnan <<a href="mailto:mahdi.adnan@outlook.com">mahdi.adnan@outlook.com</a>> wrote:</p>
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Thanks mate,</p>
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Kindly, check the attachment.<br>
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<font color="#000000"><font color="#3366ff">Respectfully</font></font><br>
<font color="#000000"><font color="#3366ff"><b>Mahdi A. Mahdi</b></font></font></p>
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<b><font color="#000000">From:</font></b><font color="#000000"> Krutika Dhananjay <</font><font color="#000000"><a href="mailto:kdhananj@redhat.com">kdhananj@redhat.com</a></font><font color="#000000">></font><br>
<font color="#000000"><b>Sent:</b></font><font color="#000000"> Sunday, March 19, 2017 10:00:22 AM
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<b>To:</b> Mahdi Adnan<br>
<b>Cc:</b> <a href="mailto:gluster-users@gluster.org">gluster-users@gluster.org</a><br>
<b>Subject:</b> Re: [Gluster-users] Gluster 3.8.10 rebalance VMs corruption</p>
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In that case could you share the ganesha-gfapi logs?</p>
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-Krutika<br>
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On Sun, Mar 19, 2017 at 12:13 PM, Mahdi Adnan <<a href="mailto:mahdi.adnan@outlook.com">mahdi.adnan@outlook.com</a>> wrote:</p>
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I have two volumes, one is mounted using libgfapi for ovirt mount, the other one is exported via NFS-Ganesha for VMWare which is the one im testing now.<br>
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<font color="#000000"><font color="#3366ff">Respectfully</font></font><br>
<font color="#000000"><font color="#3366ff"><b>Mahdi A. Mahdi</b></font></font></p>
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<b><font color="#000000">From:</font></b><font color="#000000"> Krutika Dhananjay <</font><font color="#000000"><a href="mailto:kdhananj@redhat.com">kdhananj@redhat.com</a></font><font color="#000000">></font><br>
<font color="#000000"><b>Sent:</b></font><font color="#000000"> Sunday, March 19, 2017 8:02:19 AM
</font><br>
</p>
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<b>To:</b> Mahdi Adnan<br>
<b>Cc:</b> <a href="mailto:gluster-users@gluster.org">gluster-users@gluster.org</a><br>
<b>Subject:</b> Re: [Gluster-users] Gluster 3.8.10 rebalance VMs corruption</p>
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<br>
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On Sat, Mar 18, 2017 at 10:36 PM, Mahdi Adnan <<a href="mailto:mahdi.adnan@outlook.com">mahdi.adnan@outlook.com</a>> wrote:</p>
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Kindly, check the attached new log file, i dont know if it's helpful or not but, i couldn't find the log with the name you just described.<br>
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<br>
No. Are you using FUSE or libgfapi for accessing the volume? Or is it NFS?</p>
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-Krutika</p>
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<font color="#000000"><font color="#3366ff">Respectfully</font></font><br>
<font color="#000000"><font color="#3366ff"><b>Mahdi A. Mahdi</b></font></font></p>
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<b><font color="#000000">From:</font></b><font color="#000000"> Krutika Dhananjay <</font><font color="#000000"><a href="mailto:kdhananj@redhat.com">kdhananj@redhat.com</a></font><font color="#000000">></font><br>
<font color="#000000"><b>Sent:</b></font><font color="#000000"> Saturday, March 18, 2017 6:10:40 PM
</font><br>
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<b>To:</b> Mahdi Adnan<br>
<b>Cc:</b> <a href="mailto:gluster-users@gluster.org">gluster-users@gluster.org</a><br>
<b>Subject:</b> Re: [Gluster-users] Gluster 3.8.10 rebalance VMs corruption</p>
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mnt-disk11-vmware2.log seems like a brick log. Could you attach the fuse mount logs? It should be right under /var/log/glusterfs/ directory</p>
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named after the mount point name, only hyphenated.<br>
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-Krutika<br>
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On Sat, Mar 18, 2017 at 7:27 PM, Mahdi Adnan <<a href="mailto:mahdi.adnan@outlook.com">mahdi.adnan@outlook.com</a>> wrote:</p>
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Hello Krutika,<br>
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Kindly, check the attached logs.<br>
<br>
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<font color="#000000"><font color="#3366ff">Respectfully</font></font><br>
<font color="#000000"><font color="#3366ff"><b>Mahdi A. Mahdi</b></font></font></p>
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<b><font color="#000000">From:</font></b><font color="#000000"> Krutika Dhananjay <</font><font color="#000000"><a href="mailto:kdhananj@redhat.com">kdhananj@redhat.com</a></font><font color="#000000">></font><br>
<font color="#000000"><b>Sent:</b></font><font color="#000000"> Saturday, March 18, 2017 3:29:03 PM</font><br>
<font color="#000000"><b>To:</b></font><font color="#000000"> Mahdi Adnan</font><br>
<font color="#000000"><b>Cc:</b></font><font color="#000000"> </font><font color="#000000"><a href="mailto:gluster-users@gluster.org">gluster-users@gluster.org</a></font><br>
<font color="#000000"><b>Subject:</b></font><font color="#000000"> Re: [Gluster-users] Gluster 3.8.10 rebalance VMs corruption</font>
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Hi Mahdi,</p>
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Could you attach mount, brick and rebalance logs?</p>
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-Krutika<br>
</p>
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On Sat, Mar 18, 2017 at 12:14 AM, Mahdi Adnan <<a href="mailto:mahdi.adnan@outlook.com">mahdi.adnan@outlook.com</a>> wrote:</p>
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Hi,<br>
</p>
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I have upgraded to Gluster 3.8.10 today and ran the add-brick procedure in a volume contains few VMs.</p>
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After the completion of rebalance, i have rebooted the VMs, some of ran just fine, and others just crashed.</p>
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Windows boot to recovery mode and Linux throw xfs errors and does not boot.</p>
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I ran the test again and it happened just as the first one, but i have noticed only VMs doing disk IOs are affected by this bug.</p>
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The VMs in power off mode started fine and even md5 of the disk file did not change after the rebalance.<br>
</p>
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anyone else can confirm this ?<br>
<br>
</p>
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Volume info:</p>
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</p>
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Volume Name: vmware2</p>
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Type: Distributed-Replicate</p>
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Volume ID: 02328d46-a285-4533-aa3a-fb9bfeb688bf</p>
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Status: Started</p>
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Snapshot Count: 0</p>
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Number of Bricks: 22 x 2 = 44</p>
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Transport-type: tcp</p>
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Bricks:</p>
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Brick1: gluster01:/mnt/disk1/vmware2</p>
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Brick2: gluster03:/mnt/disk1/vmware2</p>
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Brick3: gluster02:/mnt/disk1/vmware2</p>
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Brick4: gluster04:/mnt/disk1/vmware2</p>
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Brick5: gluster01:/mnt/disk2/vmware2</p>
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Brick6: gluster03:/mnt/disk2/vmware2</p>
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Brick7: gluster02:/mnt/disk2/vmware2</p>
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Brick8: gluster04:/mnt/disk2/vmware2</p>
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Brick9: gluster01:/mnt/disk3/vmware2</p>
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Brick10: gluster03:/mnt/disk3/vmware2</p>
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Brick11: gluster02:/mnt/disk3/vmware2</p>
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Brick12: gluster04:/mnt/disk3/vmware2</p>
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Brick13: gluster01:/mnt/disk4/vmware2</p>
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Brick14: gluster03:/mnt/disk4/vmware2</p>
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Brick15: gluster02:/mnt/disk4/vmware2</p>
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Brick16: gluster04:/mnt/disk4/vmware2</p>
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Brick17: gluster01:/mnt/disk5/vmware2</p>
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Brick18: gluster03:/mnt/disk5/vmware2</p>
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Brick19: gluster02:/mnt/disk5/vmware2</p>
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Brick20: gluster04:/mnt/disk5/vmware2</p>
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Brick21: gluster01:/mnt/disk6/vmware2</p>
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Brick22: gluster03:/mnt/disk6/vmware2</p>
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Brick23: gluster02:/mnt/disk6/vmware2</p>
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Brick24: gluster04:/mnt/disk6/vmware2</p>
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Brick25: gluster01:/mnt/disk7/vmware2</p>
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Brick26: gluster03:/mnt/disk7/vmware2</p>
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Brick27: gluster02:/mnt/disk7/vmware2</p>
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Brick28: gluster04:/mnt/disk7/vmware2</p>
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Brick29: gluster01:/mnt/disk8/vmware2</p>
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Brick30: gluster03:/mnt/disk8/vmware2</p>
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Brick31: gluster02:/mnt/disk8/vmware2</p>
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Brick32: gluster04:/mnt/disk8/vmware2</p>
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Brick33: gluster01:/mnt/disk9/vmware2</p>
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Brick34: gluster03:/mnt/disk9/vmware2</p>
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Brick35: gluster02:/mnt/disk9/vmware2</p>
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Brick36: gluster04:/mnt/disk9/vmware2</p>
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Brick37: gluster01:/mnt/disk10/vmware2</p>
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Brick38: gluster03:/mnt/disk10/vmware2</p>
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Brick39: gluster02:/mnt/disk10/vmware2</p>
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Brick40: gluster04:/mnt/disk10/vmware2</p>
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Brick41: gluster01:/mnt/disk11/vmware2</p>
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Brick42: gluster03:/mnt/disk11/vmware2</p>
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Brick43: gluster02:/mnt/disk11/vmware2</p>
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Brick44: gluster04:/mnt/disk11/vmware2</p>
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Options Reconfigured:</p>
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cluster.server-quorum-type: server</p>
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nfs.disable: on</p>
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performance.readdir-ahead: on</p>
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transport.address-family: inet</p>
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performance.quick-read: off</p>
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performance.read-ahead: off</p>
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performance.io-cache: off</p>
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performance.stat-prefetch: off</p>
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cluster.eager-lock: enable</p>
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network.remote-dio: enable</p>
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features.shard: on</p>
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cluster.data-self-heal-algorithm: full</p>
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features.cache-invalidation: on</p>
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ganesha.enable: on</p>
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features.shard-block-size: 256MB</p>
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client.event-threads: 2</p>
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server.event-threads: 2</p>
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cluster.favorite-child-policy: size</p>
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storage.build-pgfid: off</p>
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network.ping-timeout: 5</p>
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cluster.enable-shared-storage: enable</p>
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nfs-ganesha: enable</p>
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cluster.server-quorum-ratio: 51%<br>
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Adding bricks:</p>
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gluster volume add-brick vmware2 replica 2 gluster01:/mnt/disk11/vmware2 gluster03:/mnt/disk11/vmware2 gluster02:/mnt/disk11/vmware2 gluster04:/mnt/disk11/vmware2<br>
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starting fix layout:</p>
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gluster volume rebalance vmware2 fix-layout start<br>
</p>
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Starting rebalance:</p>
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gluster volume rebalance vmware2 start<br>
<br>
<br>
</p>
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-- </p>
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<font color="#000000"><font color="#3366ff">Respectfully</font></font><br>
<font color="#000000"><font color="#3366ff"><b>Mahdi A. Mahdi</b></font></font><br>
</p>
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_______________________________________________<br>
Gluster-users mailing list<br>
<a href="mailto:Gluster-users@gluster.org">Gluster-users@gluster.org</a><br>
<a href="http://lists.gluster.org/mailman/listinfo/gluster-users">http://lists.gluster.org/mailman/listinfo/gluster-users</a><br>
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