The following section will describe how to set up a basic replication cluster with a primary and a standby server using the repmgr command line tool.
We'll assume the primary is called node1 with IP address
192.168.1.11, and the standby is called node2
with IP address 192.168.1.12
Following software must be installed on both servers:
At network level, connections between the PostgreSQL port (default: 5432)
must be possible in both directions.
If you want repmgr to copy configuration files which are
located outside the PostgreSQL data directory, and/or to test
switchover
functionality, you will also need passwordless SSH connections between both servers, and
rsync should be installed.
For testing repmgr, it's possible to use multiple PostgreSQL
instances running on different ports on the same computer, with
passwordless SSH access to localhost enabled.