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

[Bello Florent]

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 ? 

-- 

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 mailing list
>>
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