[ovirt-users] I’m having trouble deleting a test gluster volume

Tue Apr 11 22:05:44 UTC 2017

I just noticed this in the Alerts tab: Detected deletion of volume test1 on cluster 8000-1, and deleted it from engine DB.

Yet, It still shows in the web UI?

________________________________
From: Precht, Andrew
Sent: Tuesday, April 11, 2017 2:39:31 PM
To: knarra; Sandro Bonazzola; Sahina Bose; Tal Nisan; Allon Mureinik; Nir Soffer
Cc: users
Subject: Re: [ovirt-users] I’m having trouble deleting a test gluster volume

The plot thickens…
I put all hosts in the cluster into maintenance mode, with the Stop Gluster service checkbox checked. I then deleted the /var/lib/glusterd/vols/test1 directory on all hosts. I then took the host that the test1 volume was on out of maintenance mode. Then I tried to remove the test1 volume from within the web UI. With no luck, I got the message: Could not delete Gluster Volume test1 on cluster 8000-1.

I went back and checked all host for the test1 directory, it is not on any host. Yet I still can’t remove it…

Any suggestions?

________________________________
From: Precht, Andrew
Sent: Tuesday, April 11, 2017 1:15:22 PM
To: knarra; Sandro Bonazzola; Sahina Bose; Tal Nisan; Allon Mureinik; Nir Soffer
Cc: users
Subject: Re: [ovirt-users] I’m having trouble deleting a test gluster volume

Here is an update…

I checked the /var/log/glusterfs/etc-glusterfs-glusterd.vol.log on the node that had the trouble volume (test1). I didn’t see any errors. So, I ran a tail -f on the log as I tried to remove the volume using the web UI. here is what was appended:

[2017-04-11 19:48:40.756360] I [MSGID: 106487] [glusterd-handler.c:1474:__glusterd_handle_cli_list_friends] 0-glusterd: Received cli list req
[2017-04-11 19:48:42.238840] I [MSGID: 106488] [glusterd-handler.c:1537:__glusterd_handle_cli_get_volume] 0-management: Received get vol req
The message "I [MSGID: 106487] [glusterd-handler.c:1474:__glusterd_handle_cli_list_friends] 0-glusterd: Received cli list req" repeated 6 times between [2017-04-11 19:48:40.756360] and [2017-04-11 19:49:32.596536]
The message "I [MSGID: 106488] [glusterd-handler.c:1537:__glusterd_handle_cli_get_volume] 0-management: Received get vol req" repeated 20 times between [2017-04-11 19:48:42.238840] and [2017-04-11 19:49:34.082179]
[2017-04-11 19:51:41.556077] I [MSGID: 106487] [glusterd-handler.c:1474:__glusterd_handle_cli_list_friends] 0-glusterd: Received cli list req

I’m seeing that the timestamps on these log entries do not match the time on the node.

The next steps
I stopped the glusterd service on the node with volume test1
I deleted it with:  rm -rf /var/lib/glusterd/vols/test1
I started the glusterd service.

After starting the gluster service back up, the directory /var/lib/glusterd/vols/test1 reappears.
I’m guessing syncing with the other nodes?
Is this because I have the Volume Option: auth allow *
Do I need to remove the directory /var/lib/glusterd/vols/test1 on all nodes in the cluster individually?

thanks

________________________________
From: knarra <knarra at redhat.com>
Sent: Tuesday, April 11, 2017 11:51:18 AM
To: Precht, Andrew; Sandro Bonazzola; Sahina Bose; Tal Nisan; Allon Mureinik; Nir Soffer
Cc: users
Subject: Re: [ovirt-users] I’m having trouble deleting a test gluster volume

On 04/11/2017 11:28 PM, Precht, Andrew wrote:
Hi all,
The node is oVirt Node 4.1.1 with glusterfs-3.8.10-1.el7.
On the node I can not find /var/log/glusterfs/glusterd.log However, there is a /var/log/glusterfs/glustershd.log
can you check if /var/log/glusterfs/etc-glusterfs-glusterd.vol.log exists? if yes, can you check if there is any error present in that file ?

What happens if I follow the four steps outlined here to remove the volume from the node BUT, I do have another volume present in the cluster. It too is a test volume. Neither one has any data on them. So, data loss is not an issue.
Running those four steps will remove the volume from your cluster . If the volumes what you have are test volumes you could just follow the steps outlined to delete them (since you are not able to delete from UI) and bring back the cluster into a normal state.

________________________________
From: knarra <knarra at redhat.com><mailto:knarra at redhat.com>
Sent: Tuesday, April 11, 2017 10:32:27 AM
To: Sandro Bonazzola; Precht, Andrew; Sahina Bose; Tal Nisan; Allon Mureinik; Nir Soffer
Cc: users
Subject: Re: [ovirt-users] I’m having trouble deleting a test gluster volume

On 04/11/2017 10:44 PM, Sandro Bonazzola wrote:
Adding some people

Il 11/Apr/2017 19:06, "Precht, Andrew" <Andrew.Precht at sjlibrary.org<mailto:Andrew.Precht at sjlibrary.org>> ha scritto:
Hi Ovirt users,
I’m a newbie to oVirt and I’m having trouble deleting a test gluster volume. The nodes are 4.1.1 and the engine is 4.1.0

When I try to remove the test volume, I click Remove, the dialog box prompting to confirm the deletion pops up and after I click OK, the dialog box changes to show a little spinning wheel and then it disappears. In the end the volume is still there.
with the latest version of glusterfs & ovirt we do not see any issue with deleting a volume. Can you please check /var/log/glusterfs/glusterd.log file if there is any error present?

The test volume was distributed with two host members. One of the hosts I was able to remove from the volume by removing the host form the cluster. When I try to remove the remaining host in the volume, even with the “Force Remove” box ticked, I get this response: Cannot remove Host. Server having Gluster volume.

What to try next?
since you have already removed the volume from one host in the cluster and you still see it on another host you can do the following to remove the volume from another host.

1) Login to the host where the volume is present.
2) cd to /var/lib/glusterd/vols
3) rm -rf <vol_name>
4) Restart glusterd on that  host.

And before doing the above make sure that you do not have any other volume present in the cluster.

Above steps should not be run on a production system as you might loose the volume and data.

Now removing the host from UI should succed.

P.S. I’ve tried to join this user group several times in the past, with no response.
Is it possible for me to join this group?

Regards,
Andrew

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