[ovirt-users] Another way of CTDB to mount engine

[Simone Tiraboschi]

On Mon, Sep 28, 2015 at 1:35 PM, Bello Florent <
florent.bello at ville-kourou.fr> wrote:

> hi,
>
> It's really not a single point of failure ? In this way i see 2 point of
> failure, if the hosted-engine break and if the mount server adress break.
> And it's not possible to migrate the engine.
>
>
> Can you explain me why is not a point of failure for you ?
>
That server should be up when you start deploying hosted-engine.
When VDSM accesses that volume it gathers the whole brick list so it will
then be able to use that volume also if the server you initially pointed to
start the deployment process has died.


>
> --
>
> Florent BELLO
>
>
>
> Le 28/09/2015 05:45, Simone Tiraboschi a écrit :
>
>
>
> On Fri, Sep 25, 2015 at 5:36 PM, Bello Florent <
> florent.bello at ville-kourou.fr> wrote:
>
>> Hi,
>>
>> I have 3 nodes with glusterfs installed. I configured replica 3 on my
>> engine volume.
>>
>
> Hi,
> on oVirt  3.6 we still not support hyper convergence that means that you
> cannot use the same hosts for virtualization and for storage with gluster.
>
> So the correct approach is renaming your hosts to:
> host 1 : "192.168.100.101 gluster1.localdomain gluster1"
> host 2 : "192.168.100.102 gluster2.localdomain gluster2"
> host 3 : "192.168.100.103 gluster3.localdomain gluster3"
>
> On an additional host, deploy hosted-engine choosing the gluster host you
> prefer as your entry point: it will not be a single point of failure.
> You don't really need to use CTDB to deploy oVirt hosted-engine.
>
>
>>
>> i don't want to use ctdb for my hosted-engine, but when i start
>> hosted-engine --deploy, use localhost:/engine or
>> gluster.localdomain:/engine, gluster.localdomain is configured in all
>> servers /etc/hosts like :
>> host 1 : "192.168.100.101 gluster.localdomain gluster"
>> host 2 : "192.168.100.102 gluster.localdomain gluster"
>> host 3 : "192.168.100.103 gluster.localdomain gluster",
>>
>> the setup failed with :
>>
>> --== STORAGE CONFIGURATION ==--
>>
>>           During customization use CTRL-D to abort.
>>           Please specify the storage you would like to use (glusterfs,
>> iscsi, fc, nfs3, nfs4)[nfs3]: glusterfs
>> [ INFO  ] Please note that Replica 3 support is required for the shared
>> storage.
>>           Please specify the full shared storage connection path to use
>> (example: host:/path): localhost:/engine
>> [WARNING] Due to several bugs in mount.glusterfs the validation of
>> GlusterFS share cannot be reliable.
>> [ INFO  ] GlusterFS replica 3 Volume detected
>> [ ERROR ] Failed to execute stage 'Environment customization': Connection
>> to storage server failed
>> [ INFO  ] Stage: Clean up
>> [ INFO  ] Generating answer file
>> '/var/lib/ovirt-hosted-engine-setup/answers/answers-20150925121036.conf'
>> [ INFO  ] Stage: Pre-termination
>> [ INFO  ] Stage: Termination
>>
>> I have to use obligatory ctdb or keepalived, or existing another way ?
>> --
>>
>> Florent BELLO
>> Service Informatique
>> informatique at ville-kourou.fr
>> 0594 22 31 22
>> Mairie de Kourou
>>
>> _______________________________________________
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>> Users at ovirt.org
>> http://lists.ovirt.org/mailman/listinfo/users
>>
>>
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