[Gluster-users] corruption using gluster and iSCSI with LIO
David Gossage
dgossage at carouselchecks.com
Fri Nov 18 14:39:41 UTC 2016
On Fri, Nov 18, 2016 at 3:49 AM, Olivier Lambert <lambert.olivier at gmail.com>
wrote:
> Hi David,
>
> What are the exact commands to be sure it's fine?
>
> Right now I got:
>
> # gluster volume heal gv0 info
> Brick 10.0.0.1:/bricks/brick1/gv0
> Status: Connected
> Number of entries: 0
>
> Brick 10.0.0.2:/bricks/brick1/gv0
> Status: Connected
> Number of entries: 0
>
> Brick 10.0.0.3:/bricks/brick1/gv0
> Status: Connected
> Number of entries: 0
>
>
> Did you run this before taking down 2nd node to see if any heals were
ongoing?
Also I see you have sharding enabled. Are your files being served sharded
already as well?
> Everything is online and working, but this command give a strange output:
>
> # gluster volume heal gv0 info heal-failed
> Gathering list of heal failed entries on volume gv0 has been
> unsuccessful on bricks that are down. Please check if all brick
> processes are running.
>
> Is it normal?
>
I don't think that is a valid command anymore as whern I run it I get same
message and this is in logs
[2016-11-18 14:35:02.260503] I [MSGID: 106533]
[glusterd-volume-ops.c:878:__glusterd_handle_cli_heal_volume] 0-management:
Received heal vol req for volume GLUSTER1
[2016-11-18 14:35:02.263341] W [MSGID: 106530]
[glusterd-volume-ops.c:1882:glusterd_handle_heal_cmd] 0-management: Command
not supported. Please use "gluster volume heal GLUSTER1 info" and logs to
find the heal information.
[2016-11-18 14:35:02.263365] E [MSGID: 106301]
[glusterd-syncop.c:1297:gd_stage_op_phase] 0-management: Staging of
operation 'Volume Heal' failed on localhost : Command not supported. Please
use "gluster volume heal GLUSTER1 info" and logs to find the heal
information.
> On Fri, Nov 18, 2016 at 2:51 AM, David Gossage
> <dgossage at carouselchecks.com> wrote:
> >
> > On Thu, Nov 17, 2016 at 6:42 PM, Olivier Lambert <
> lambert.olivier at gmail.com>
> > wrote:
> >>
> >> Okay, used the exact same config you provided, and adding an arbiter
> >> node (node3)
> >>
> >> After halting node2, VM continues to work after a small "lag"/freeze.
> >> I restarted node2 and it was back online: OK
> >>
> >> Then, after waiting few minutes, halting node1. And **just** at this
> >> moment, the VM is corrupted (segmentation fault, /var/log folder empty
> >> etc.)
> >>
> > Other than waiting a few minutes did you make sure heals had completed?
> >
> >>
> >> dmesg of the VM:
> >>
> >> [ 1645.852905] EXT4-fs error (device xvda1):
> >> htree_dirblock_to_tree:988: inode #19: block 8286: comm bash: bad
> >> entry in directory: rec_len is smaller than minimal - offset=0(0),
> >> inode=0, rec_len=0, name_len=0
> >> [ 1645.854509] Aborting journal on device xvda1-8.
> >> [ 1645.855524] EXT4-fs (xvda1): Remounting filesystem read-only
> >>
> >> And got a lot of " comm bash: bad entry in directory" messages then...
> >>
> >> Here is the current config with all Node back online:
> >>
> >> # gluster volume info
> >>
> >> Volume Name: gv0
> >> Type: Replicate
> >> Volume ID: 5f15c919-57e3-4648-b20a-395d9fe3d7d6
> >> Status: Started
> >> Snapshot Count: 0
> >> Number of Bricks: 1 x (2 + 1) = 3
> >> Transport-type: tcp
> >> Bricks:
> >> Brick1: 10.0.0.1:/bricks/brick1/gv0
> >> Brick2: 10.0.0.2:/bricks/brick1/gv0
> >> Brick3: 10.0.0.3:/bricks/brick1/gv0 (arbiter)
> >> Options Reconfigured:
> >> nfs.disable: on
> >> performance.readdir-ahead: on
> >> transport.address-family: inet
> >> features.shard: on
> >> features.shard-block-size: 16MB
> >> network.remote-dio: enable
> >> cluster.eager-lock: enable
> >> performance.io-cache: off
> >> performance.read-ahead: off
> >> performance.quick-read: off
> >> performance.stat-prefetch: on
> >> performance.strict-write-ordering: off
> >> cluster.server-quorum-type: server
> >> cluster.quorum-type: auto
> >> cluster.data-self-heal: on
> >>
> >>
> >> # gluster volume status
> >> Status of volume: gv0
> >> Gluster process TCP Port RDMA Port Online
> >> Pid
> >>
> >> ------------------------------------------------------------
> ------------------
> >> Brick 10.0.0.1:/bricks/brick1/gv0 49152 0 Y
> >> 1331
> >> Brick 10.0.0.2:/bricks/brick1/gv0 49152 0 Y
> >> 2274
> >> Brick 10.0.0.3:/bricks/brick1/gv0 49152 0 Y
> >> 2355
> >> Self-heal Daemon on localhost N/A N/A Y
> >> 2300
> >> Self-heal Daemon on 10.0.0.3 N/A N/A Y
> >> 10530
> >> Self-heal Daemon on 10.0.0.2 N/A N/A Y
> >> 2425
> >>
> >> Task Status of Volume gv0
> >>
> >> ------------------------------------------------------------
> ------------------
> >> There are no active volume tasks
> >>
> >>
> >>
> >> On Thu, Nov 17, 2016 at 11:35 PM, Olivier Lambert
> >> <lambert.olivier at gmail.com> wrote:
> >> > It's planned to have an arbiter soon :) It was just preliminary tests.
> >> >
> >> > Thanks for the settings, I'll test this soon and I'll come back to
> you!
> >> >
> >> > On Thu, Nov 17, 2016 at 11:29 PM, Lindsay Mathieson
> >> > <lindsay.mathieson at gmail.com> wrote:
> >> >> On 18/11/2016 8:17 AM, Olivier Lambert wrote:
> >> >>>
> >> >>> gluster volume info gv0
> >> >>>
> >> >>> Volume Name: gv0
> >> >>> Type: Replicate
> >> >>> Volume ID: 2f8658ed-0d9d-4a6f-a00b-96e9d3470b53
> >> >>> Status: Started
> >> >>> Snapshot Count: 0
> >> >>> Number of Bricks: 1 x 2 = 2
> >> >>> Transport-type: tcp
> >> >>> Bricks:
> >> >>> Brick1: 10.0.0.1:/bricks/brick1/gv0
> >> >>> Brick2: 10.0.0.2:/bricks/brick1/gv0
> >> >>> Options Reconfigured:
> >> >>> nfs.disable: on
> >> >>> performance.readdir-ahead: on
> >> >>> transport.address-family: inet
> >> >>> features.shard: on
> >> >>> features.shard-block-size: 16MB
> >> >>
> >> >>
> >> >>
> >> >> When hosting VM's its essential to set these options:
> >> >>
> >> >> network.remote-dio: enable
> >> >> cluster.eager-lock: enable
> >> >> performance.io-cache: off
> >> >> performance.read-ahead: off
> >> >> performance.quick-read: off
> >> >> performance.stat-prefetch: on
> >> >> performance.strict-write-ordering: off
> >> >> cluster.server-quorum-type: server
> >> >> cluster.quorum-type: auto
> >> >> cluster.data-self-heal: on
> >> >>
> >> >> Also with replica two and quorum on (required) your volume will
> become
> >> >> read-only when one node goes down to prevent the possibility of
> >> >> split-brain
> >> >> - you *really* want to avoid that :)
> >> >>
> >> >> I'd recommend a replica 3 volume, that way 1 node can go down, but
> the
> >> >> other
> >> >> two still form a quorum and will remain r/w.
> >> >>
> >> >> If the extra disks are not possible, then a Arbiter volume can be
> setup
> >> >> -
> >> >> basically dummy files on the third node.
> >> >>
> >> >>
> >> >>
> >> >> --
> >> >> Lindsay Mathieson
> >> >>
> >> >> _______________________________________________
> >> >> Gluster-users mailing list
> >> >> Gluster-users at gluster.org
> >> >> http://www.gluster.org/mailman/listinfo/gluster-users
> >> _______________________________________________
> >> Gluster-users mailing list
> >> Gluster-users at gluster.org
> >> http://www.gluster.org/mailman/listinfo/gluster-users
> >
> >
>
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