[Gluster-users] Why is it not possible to mount a replicated gluster volume with one Gluster server?

[Joe Julian]

On 08/31/2015 09:03 PM, Atin Mukherjee wrote:
>
> On 09/01/2015 01:00 AM, Merlin Morgenstern wrote:
>> this all makes sense and sounds a bit like a solr setup :-)
>>
>> I have now added the third node as a peer
>> sudo gluster peer probe gs3
>>
>> That indeed allow me to mount the share manually on node2 even if node1 is
>> down.
>>
>> BUT: It does not mount on reboot! It only successfully mounts if node1 is
>> up. I need to do a manual: sudo mount -a
> You would need to ensure that at least two of the nodes are up in the
> cluster in this case.

Atin, why? I've never had that restriction.

It sounds to me like the mount's trying to happen before any bricks are 
available and/or glusterd is listening.

>> Is there a particular reason for this, or is it a misconfiguration?
>>
>>
>>
>> 2015-08-31 21:01 GMT+02:00 Joe Julian <joe at julianfamily.org>:
>>
>>>
>>> On 08/31/2015 10:41 AM, Vijay Bellur wrote:
>>>
>>>> On Monday 31 August 2015 10:42 PM, Atin Mukherjee wrote:
>>>>
>>>>>   > 2. Server2 dies. Server1 has to reboot.
>>>>>   >
>>>>>   > In this case the service stays down. It is inpossible to remount the
>>>>> share without Server1. This is not acceptable for a High Availability
>>>>> System and I believe also not intended, but a misconfiguration or bug.
>>>>> This is exactly what I gave as an example in the thread (please read
>>>>> again). GlusterD is not supposed to start brick process if its other
>>>>> counter part hasn't come up yet in a 2 node setup. The reason it has
>>>>> been designed in this way is to block GlusterD on operating on a volume
>>>>> which could be stale as the node was down and cluster was operational
>>>>> earlier.
>>>>>
>>>> For two node deployments, a third dummy node is recommended to ensure
>>>> that quorum is maintained when one of the nodes is down.
>>>>
>>>> Regards,
>>>> Vijay
>>>>
>>> Have the settings changed to enable server quorum by default?
>>>
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>>
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