[Gluster-users] Geo replication snapshot error
Kotresh Hiremath Ravishankar
khiremat at redhat.com
Wed Feb 21 09:14:00 UTC 2018
Hi,
Thanks for reporting the issue. This seems to be a bug.
Could you please raise a bug at https://bugzilla.redhat.com/ under
community/glusterfs ?
We will take a look at it and fix it.
Thanks,
Kotresh HR
On Wed, Feb 21, 2018 at 2:01 PM, Marcus Pedersén <marcus.pedersen at slu.se>
wrote:
> Hi all,
> I use gluster 3.12 on centos 7.
> I am writing a snapshot program for my geo-replicated cluster.
> Now when I started to run tests with my application I have found
> a very strange behavior regarding geo-replication in gluster.
>
> I have setup my geo-replication according to the docs:
> http://docs.gluster.org/en/latest/Administrator%20Guide/Geo%20Replication/
>
> Both master and slave clusters are replicated with just two
> machines (VM) and no arbiter.
>
> I have setup a geo-user (called geouser) and do not use
> root as the geo user, as specified in the docs.
>
> Both my master and slave volumes are named: vol
>
> If I pause the geo-replication with:
> gluster volume geo-replication vol geouser at ggluster1-geo::vol pause
> Pausing geo-replication session between vol & geouser at ggluster1-geo::vol
> has been successful
>
> Create a snapshot:
> gluster snapshot create my_snap_no_1000 vol
> snapshot create: success: Snap my_snap_no_1000-2018.02.21-07.45.32
> created successfully
>
> Resume geo-replication:
> gluster volume geo-replication vol geouser at ggluster1-geo::vol resume
> Resuming geo-replication session between vol & geouser at ggluster1-geo::vol
> has been successful
>
>
> Everything works fine!
>
> But here comes the problem:
> If I by accident spell my slave user wrong or don't use
> the user at all, as I was using root,
> no matter what user I write pause/resume do NOT report
> any errors. The answer is always pausing/resuming successful.
> The problem comes after a successful pause when I try to
> create a snapshot. It fails with:
> snapshot create: failed: geo-replication session is running for the volume
> vol. Session needs to be stopped before taking a snapshot.
>
> gluster volume geo-replication status
> MASTER NODE MASTER VOL MASTER BRICK SLAVE USER SLAVE
> SLAVE NODE STATUS CRAWL STATUS LAST_SYNCED
> ------------------------------------------------------------
> ------------------------------------------------------------
> -------------------------
> ggluster1 vol /gluster geouser
> ssh://geouser@ggluster1-geo::vol N/A Paused N/A
> N/A
> ggluster2 vol /gluster geouser
> ssh://geouser@ggluster1-geo::vol N/A Paused N/A
> N/A
>
>
> After this snapshots fails all the time!
> If I use the correct user again and pause, no error (paused), snapshot
> fails.
> If I resume with correct user, no errors (active).
> Geo-replication still works fine, but some how has something
> gone wrong so snapshots fail.
> After restart of glusterd in all machines it starts to work again.
>
>
> Here is complete run through:
>
> gluster volume geo-replication status
>
> MASTER NODE MASTER VOL MASTER BRICK SLAVE USER SLAVE
> SLAVE NODE STATUS CRAWL STATUS
> LAST_SYNCED
> ------------------------------------------------------------
> ------------------------------------------------------------
> ----------------------------------------
> ggluster1 vol /gluster geouser
> ssh://geouser@ggluster1-geo::vol ggluster1-geo Active
> Changelog Crawl 2018-02-12 15:49:57
> ggluster2 vol /gluster geouser
> ssh://geouser@ggluster1-geo::vol ggluster2-geo Passive N/A
> N/A
>
> # Using wrong user: abc
> gluster volume geo-replication vol abc at ggluster1-geo::vol pause
> Pausing geo-replication session between vol & abc at ggluster1-geo::vol has
> been successful
>
>
> gluster volume geo-replication status
>
> MASTER NODE MASTER VOL MASTER BRICK SLAVE USER SLAVE
> SLAVE NODE STATUS CRAWL STATUS LAST_SYNCED
> ------------------------------------------------------------
> ------------------------------------------------------------
> -------------------------
> ggluster1 vol /gluster geouser
> ssh://geouser@ggluster1-geo::vol N/A Paused N/A
> N/A
> ggluster2 vol /gluster geouser
> ssh://geouser@ggluster1-geo::vol N/A Paused N/A
> N/A
>
>
> gluster snapshot create snap_vol_1000 vol
> snapshot create: failed: geo-replication session is running for the volume
> vol. Session needs to be stopped before taking a snapshot.
>
> # Using wrong user: abc
> gluster volume geo-replication vol abc at ggluster1-geo::vol resume
> Resuming geo-replication session between vol & ggluster1-geo::vol has been
> successful
>
>
> gluster volume geo-replication status
>
> MASTER NODE MASTER VOL MASTER BRICK SLAVE USER SLAVE
> SLAVE NODE STATUS CRAWL STATUS
> LAST_SYNCED
> ------------------------------------------------------------
> ------------------------------------------------------------
> ----------------------------------------
> ggluster1 vol /gluster geouser
> ssh://geouser@ggluster1-geo::vol ggluster1-geo Active
> Changelog Crawl 2018-02-12 15:49:57
> ggluster2 vol /gluster geouser
> ssh://geouser@ggluster1-geo::vol ggluster2-geo Passive N/A
> N/A
>
>
> Many thanks in advance!
>
> Best regards
> Marcus
>
>
> --
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--
Thanks and Regards,
Kotresh H R
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