[Gluster-users] Convert replica 2 to replica 2+1 arbiter

[Jim Kinney]

I've found adjusting gluster to be far easier than I originally thought. A change like adding or removing  a brick, either replica or arbiter, works well, live, and fast.

I've recently added replica bricks live to a 3.8 setup. I've removed arbiter bricks live from a 3.10 backing an ovirt environment. Both of these just worked with no issues.

Adding an arbiter to a replica pair will work automagically. The only caveat is it needs to be a fully synched, clean replica pair with no split-brain or heal issues. 

On February 25, 2018 9:52:37 AM EST, "Mitja Mihelič" <mitja.mihelic at arnes.si> wrote:
>I must ask again, just to be sure. Is what you are proposing definitely
>
>supported in v3.8?
>
>Kind regards,
>Mitja
>
>On 25/02/2018 13:55, Jim Kinney wrote:
>> gluster volume add-brick volname replica 3 arbiter 1 
>> brickhost:brickpath/to/new/arbitervol
>>
>> Yes. The replica 3 looks odd. Somewhere in 3.12 (?) or not until v4 a
>
>> change in command will happen so it won't count the arbiter as a
>replica.
>>
>> On February 25, 2018 5:05:04 AM EST, "Mitja Mihelič" 
>> <mitja.mihelic at arnes.si> wrote:
>>
>>     Hi!
>>
>>     I am using GlusterFS on CentOS7 with glusterfs-3.8.15 RPM
>version.
>>     I currently have a replica 2 running and I would like to get rid
>of the
>>     split-brain problem before it occurs. This is one of the possible
>solutions.
>>
>>     Is it possible to and an arbiter to this volume?
>>     I have read in a thread from 2016 that this feature is planned
>for
>>     version 3.8.
>>     Is the feature available? If so, could you give me an example of
>how to
>>     do it?
>>
>>     Kind regards,
>>     Mitja
>>    
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>>
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