10:15 p.m.
This is a GLusterfs Domain.
I repeated my test (powering off ovirt1).
This time the VM on ovirt2 continued to run just fine.
I noticed that engine.log said ovirt3 was now the Storage Pool Manager.
So after ovirt1 was all healed, I powered off ovirt3.
ovirt1 powered off:
[root@ovirt2 test ~]# gluster peer status
Number of Peers: 2
Hostname: 10.100.108.31 (ovirt1)
Uuid: 758d0477-7c9d-496b-91a8-cc1113cf09c4
State: Peer in Cluster (Disconnected)
Hostname: ovirt3.test.j2noc.com
Uuid: dfe44d58-7050-4b8d-ba2f-5ddba1cab2e8
State: Peer in Cluster (Connected)
Other names:
ovirt3.test.j2noc.com
[root@ovirt2 test ~]# gluster volume status
Status of volume: gv1
Gluster process TCP Port RDMA Port Online Pid
------------------------------------------------------------------------------
Brick ovirt2-ks.test.j2noc.com:/gluster-sto
re/brick1/gv1 49152 0 Y 45784
Brick ovirt3-ks.test.j2noc.com:/gluster-sto
re/brick1/gv1 49152 0 Y 8536
NFS Server on localhost 2049 0 Y 45779
Self-heal Daemon on localhost N/A N/A Y 45789
NFS Server on ovirt3.test.j2noc.com 2049 0 Y 8546
Self-heal Daemon on ovirt3.test.j2noc.com N/A N/A Y 8551
Task Status of Volume gv1
------------------------------------------------------------------------------
There are no active volume tasks
ovirt3 powered off:
[root@ovirt2 test ~]# gluster peer status
Number of Peers: 2
Hostname: 10.100.108.31
Uuid: 758d0477-7c9d-496b-91a8-cc1113cf09c4
State: Peer in Cluster (Connected)
Hostname: ovirt3.test.j2noc.com
Uuid: dfe44d58-7050-4b8d-ba2f-5ddba1cab2e8
State: Peer in Cluster (Disconnected)
Other names:
ovirt3.test.j2noc.com
test VM hung, and was paused:
2016-02-17 11:53:51,254 ERROR
[org.ovirt.engine.core.dal.dbbroker.auditloghandl
ing.AuditLogDirector] (DefaultQuartzScheduler_Worker-14) [1f0d3877]
Correlation
ID: null, Call Stack: null, Custom Event ID: -1, Message: VM
billjov1.test.j2noc.com has been paused due to unknown storage error.
I got impatient waiting for test VM (billjov1) to unpause so I selected
"run" to activate it again.
Attached are engine.log, vdsm.log.xz, sanlock.log from ovirt2. ovirt*
are all hardware nodes.
Also attached vdsm.log.1.xz from yesterday's test.
Thanks.
On 02/16/2016 11:13 PM, Nir Soffer wrote:
On Wed, Feb 17, 2016 at 7:57 AM, Sahina Bose
<sabose(a)redhat.com> wrote:
>
> On 02/17/2016 05:08 AM, Bill James wrote:
>> I have a ovirt cluster with and system running ovirt-engine 3.6.2.6-1 on
>> centos7.2
>> and 3 hardware nodes running glusterfs 3.7.6-1 and centos7.2.
>> I created a gluster volume using gluster cli and then went to add a
>> storage domain.
>>
>> I created it with Path ovirt1-ks.test:/gv1 and all works fine, until
>> ovirt1 goes down.
>> Then ALL VMs pause till ovirt1 comes back up.
>> Do I have to list all nodes in the path for this to work?
>>
>> Path: ovirt1-ks.test:/gv1 ovirt2-ks.test:/gv1 ovirt3-ks.test:/gv1
>>
>> Or how do I prevent ovirt1 from being single point of failure?
>
> Which type of storage domain have you created - NFS or GlusterFS?
> With NFS, this could be a problem, as the nfs server running on ovirt1 can
> become single point of failure. To work around this, you will need to set up
> HA with CTDB or pacemaker/corosync depending on version of NFS you're using.
>
> If you're using glusterfs, did the hypervisor node go down as well when
> ovirt1 went down? Only during mounting of the storage domain (either on
> activate of hypervisor host/ reboot of host) is the server provided in path
> required to access volume (ovirt1). You can provide
> backup-volfile-servers=ovirt2-ks:ovirt3-ks in Mount options while creating
> the storage domain.
oVirt is automatically detecting the available bricks and generating the
backup-volfile-servers option when connecting to a gluster storage domain.
You can see if this worked in vdsm.log, the backup-volfile-servers option
should appear in the mount command.
Please attach vdsm.log showing the time you connected to the gluster
storage domain, and the time of the failure.
Attach also /var/log/sanlock.log - this is the best place to detect issues
accessing storage as it reads and writes to all storage domains frequently.
> Please also provide output of gluster volume info. (I'm assuming the bricks
> on the remaining servers were online)
Nir
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