Re: repmgr won't update witness after failover

From: Jony Cohen <jony(dot)cohenjo(at)gmail(dot)com>
To: Aviel Buskila <aviel33(at)gmail(dot)com>
Cc: PostgreSQL General <pgsql-general(at)postgresql(dot)org>
Subject: Re: repmgr won't update witness after failover
Date: 2015-08-13 12:06:13
Message-ID: CAD9xk18MZ07hfznL7omvyCskN3=atJ=vy3PN4S6eRBJevD5pqw@mail.gmail.com
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Hi Aviel,
you can use the 'show cluster' command to see the repmgr state before you
do the 2nd failover - make sure the node1 is indeed marked as replica.
After a failover the Master doesn't automatically attach to the new master
- you need to point him as a slave (standby follow - if possible...)
did you start the repmgrd on node1 after making it a replica of the new
master? (it needs 2 daemons to decide what to promote)

Regards,
- Jony

On Thu, Aug 13, 2015 at 1:29 PM, Aviel Buskila <aviel33(at)gmail(dot)com> wrote:

> Hey,
> I have set up three nodes of postgresql 9.4 with repmgr in this way:
> 1. master - node1
> 2. standby - node2
> 3. witness - node3
>
> Now I have set up the replication and the witness as it says here:
> https://github.com/2ndQuadrant/repmgr/blob/master/FAILOVER.rst
>
> Now when I do 'kill -9 $(pidof postmaster)' The witness detects that
> something went wrong and fails over from node1 to node2
> But when I setup the replication now to work from node2 to node1 and I
> kill the postgresql process it doesn't failover and the repmgrd log shows
> the following message:
> unable to determine a valid master server; waiting 10 seconds to retry...
>
> it seems that the witness doesn't know about the new standby server..
>
> Has anyone got any idea about what am I doing wrong here?
>
>
> Best regards,
> Aviel Buskila
>

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