[Gluster-users] geo-replication

[Marcus Pedersén]

Hi all,

I am planning my new gluster system and tested things out in
a bunch of virtual machines.
I need a bit of help to understand how geo-replication behaves.

I have a master gluster cluster replica 2
(in production I will use an arbiter and replicatied/distributed)
and the geo cluster is distributed with 2 machines.
(in production I will have the geo cluster distributed)

Everything is up and running and creating files from client both
replicates and is distributed in the geo cluster.

The thing I am wondering about is:
When I run: gluster volume geo-replication status
I see both slave nodes one is active and the other is passive.

MASTER NODE    MASTER VOL     MASTER BRICK    SLAVE USER    SLAVE                                          SLAVE NODE      STATUS     CRAWL STATUS       LAST_SYNCED                  
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------
gluster1       interbullfs    /interbullfs    geouser       ssh://geouser@gluster-geo1::interbullfs-geo    gluster-geo2    Active     Changelog Crawl    2018-02-06 11:46:08          
gluster2       interbullfs    /interbullfs    geouser       ssh://geouser@gluster-geo1::interbullfs-geo    gluster-geo1    Passive    N/A                N/A


If I shutdown the active slave the status changes to faulty
and the other one continues to be passive.

MASTER NODE    MASTER VOL     MASTER BRICK    SLAVE USER    SLAVE                                          SLAVE NODE      STATUS     CRAWL STATUS    LAST_SYNCED          
----------------------------------------------------------------------------------------------------------------------------------------------------------------
gluster1       interbullfs    /interbullfs    geouser       ssh://geouser@gluster-geo1::interbullfs-geo    N/A             Faulty     N/A             N/A                  
gluster2       interbullfs    /interbullfs    geouser       ssh://geouser@gluster-geo1::interbullfs-geo    gluster-geo1    Passive    N/A             N/A


In my understanding I thought that if the active slave stopped
working the passive slave should become active and should
continue to replicate from master.

Am I wrong? Is there just one active slave if it is setup as
a distributed system?

What I use:
Centos 7, gluster 3.12
I have followed the geo instructions:
http://docs.gluster.org/en/latest/Administrator%20Guide/Geo%20Replication/

Many thanks in advance!

Bets regards
Marcus

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* Marcus Pedersén                                * 
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