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From: Amit Sharma <[email protected]>
To: [email protected]
Subject: PostgreSQL-v13-Repmgr: Split-Brain issue
Date: Fri, 9 Aug 2024 11:40:28 -0400
Message-ID: <CAHER7Lpb38HFMLF-qQPDGNuHJHe4=wETAiYBbiM6V-QK7qjxbA@mail.gmail.com> (raw)

Hi,



I have PosgreSQL primary and a local standby(same data center) and a remote
standby for DR purposes. Currently repmgr is enabled on the same servers
for an automatic failover but it's running into split brain issues.



I have two questions:

   1. In order to avoid split-brain between primary and local standby, can
   repmgr be set up on a separate witness node to help provide fencing or
   prevent a split brain?
   2. If so, can I use the same witness server for multiple sets of primary
   and secondary postgresql servers/clusters? like one witness server for one
   environment that can have multiple postgreSQL clusters? Is there any
   document available for that configuration?


Thanks
Amit

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