[Gluster-users] [ovirt-users] Gluster problems, cluster performance issues

[Sahina Bose]

[Adding gluster-users to look at the heal issue]

On Tue, May 29, 2018 at 9:17 AM, Jim Kusznir <jim at palousetech.com> wrote:

> Hello:
>
> I've been having some cluster and gluster performance issues lately.  I
> also found that my cluster was out of date, and was trying to apply updates
> (hoping to fix some of these), and discovered the ovirt 4.1 repos were
> taken completely offline.  So, I was forced to begin an upgrade to 4.2.
> According to docs I found/read, I needed only add the new repo, do a yum
> update, reboot, and be good on my hosts (did the yum update, the
> engine-setup on my hosted engine).  Things seemed to work relatively well,
> except for a gluster sync issue that showed up.
>
> My cluster is a 3 node hyperconverged cluster.  I upgraded the hosted
> engine first, then engine 3.  When engine 3 came back up, for some reason
> one of my gluster volumes would not sync.  Here's sample output:
>
> [root at ovirt3 ~]# gluster volume heal data-hdd info
> Brick 172.172.1.11:/gluster/brick3/data-hdd
> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/48d7ecb8-
> 7ac5-4725-bca5-b3519681cf2f/0d6080b0-7018-4fa3-bb82-1dd9ef07d9b9
> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/647be733-
> f153-4cdc-85bd-ba72544c2631/b453a300-0602-4be1-8310-8bd5abe00971
> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/6da854d1-
> b6be-446b-9bf0-90a0dbbea830/3c93bd1f-b7fa-4aa2-b445-6904e31839ba
> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/7f647567-
> d18c-44f1-a58e-9b8865833acb/f9364470-9770-4bb1-a6b9-a54861849625
> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/f3c8e7aa-
> 6ef2-42a7-93d4-e0a4df6dd2fa/2eb0b1ad-2606-44ef-9cd3-ae59610a504b
> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/b1ea3f62-
> 0f05-4ded-8c82-9c91c90e0b61/d5d6bf5a-499f-431d-9013-5453db93ed32
> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/8c8b5147-
> e9d6-4810-b45b-185e3ed65727/16f08231-93b0-489d-a2fd-687b6bf88eaa
> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/12924435-
> b9c2-4aab-ba19-1c1bc31310ef/07b3db69-440e-491e-854c-bbfa18a7cff2
> Status: Connected
> Number of entries: 8
>
> Brick 172.172.1.12:/gluster/brick3/data-hdd
> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/48d7ecb8-
> 7ac5-4725-bca5-b3519681cf2f/0d6080b0-7018-4fa3-bb82-1dd9ef07d9b9
> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/647be733-
> f153-4cdc-85bd-ba72544c2631/b453a300-0602-4be1-8310-8bd5abe00971
> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/b1ea3f62-
> 0f05-4ded-8c82-9c91c90e0b61/d5d6bf5a-499f-431d-9013-5453db93ed32
> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/6da854d1-
> b6be-446b-9bf0-90a0dbbea830/3c93bd1f-b7fa-4aa2-b445-6904e31839ba
> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/7f647567-
> d18c-44f1-a58e-9b8865833acb/f9364470-9770-4bb1-a6b9-a54861849625
> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/8c8b5147-
> e9d6-4810-b45b-185e3ed65727/16f08231-93b0-489d-a2fd-687b6bf88eaa
> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/12924435-
> b9c2-4aab-ba19-1c1bc31310ef/07b3db69-440e-491e-854c-bbfa18a7cff2
> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/f3c8e7aa-
> 6ef2-42a7-93d4-e0a4df6dd2fa/2eb0b1ad-2606-44ef-9cd3-ae59610a504b
> Status: Connected
> Number of entries: 8
>
> Brick 172.172.1.13:/gluster/brick3/data-hdd
> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/b1ea3f62-
> 0f05-4ded-8c82-9c91c90e0b61/d5d6bf5a-499f-431d-9013-5453db93ed32
> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/8c8b5147-
> e9d6-4810-b45b-185e3ed65727/16f08231-93b0-489d-a2fd-687b6bf88eaa
> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/12924435-
> b9c2-4aab-ba19-1c1bc31310ef/07b3db69-440e-491e-854c-bbfa18a7cff2
> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/f3c8e7aa-
> 6ef2-42a7-93d4-e0a4df6dd2fa/2eb0b1ad-2606-44ef-9cd3-ae59610a504b
> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/647be733-
> f153-4cdc-85bd-ba72544c2631/b453a300-0602-4be1-8310-8bd5abe00971
> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/48d7ecb8-
> 7ac5-4725-bca5-b3519681cf2f/0d6080b0-7018-4fa3-bb82-1dd9ef07d9b9
> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/6da854d1-
> b6be-446b-9bf0-90a0dbbea830/3c93bd1f-b7fa-4aa2-b445-6904e31839ba
> /cc65f671-3377-494a-a7d4-1d9f7c3ae46c/images/7f647567-
> d18c-44f1-a58e-9b8865833acb/f9364470-9770-4bb1-a6b9-a54861849625
> Status: Connected
> Number of entries: 8
>
> ---------
> Its been in this state for a couple days now, and bandwidth monitoring
> shows no appreciable data moving.  I've tried repeatedly commanding a full
> heal from all three clusters in the node.  Its always the same files that
> need healing.
>
> When running gluster volume heal data-hdd statistics, I see sometimes
> different information, but always some number of "heal failed" entries.  It
> shows 0 for split brain.
>
> I'm not quite sure what to do.  I suspect it may be due to nodes 1 and 2
> still being on the older ovirt/gluster release, but I'm afraid to upgrade
> and reboot them until I have a good gluster sync (don't need to create a
> split brain issue).  How do I proceed with this?
>
> Second issue: I've been experiencing VERY POOR performance on most of my
> VMs.  To the tune that logging into a windows 10 vm via remote desktop can
> take 5 minutes, launching quickbooks inside said vm can easily take 10
> minutes.  On some linux VMs, I get random messages like this:
> Message from syslogd at unifi at May 28 20:39:23 ...
>  kernel:[6171996.308904] NMI watchdog: BUG: soft lockup - CPU#0 stuck for
> 22s! [mongod:14766]
>
> (the process and PID are often different)
>
> I'm not quite sure what to do about this either.  My initial thought was
> upgrad everything to current and see if its still there, but I cannot move
> forward with that until my gluster is healed...
>
> Thanks!
> --Jim
>
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