This may seem like a lot of instructions, but they're actually very simple, merely numerous. We start the process by actually installing repmgr on both nodes. Depending on our OS, we do this either with yum or apt-get.
Once we've installed repmgr, we want to focus on pg-primary as it will be the source of all of our data clones. To facilitate secure communication, our first job is to establish an RSA SSH key pair and transmit it to the clone. For repmgr to work best, every server should be able to interact with every other server in this manner.
Then, we need to modify some PostgreSQL configuration files. We start with the postgresql.conf file. Earlier chapters recommend that you set wal_level to replica, but what about the ...
