Using repmgr to create replica

As mentioned earlier in this chapter, repmgr is a management suite to manage replication setups and also to create replicas and add them to the existing PostgreSQL clusters. In this recipe, we are going to create a new clone of the primary server.

This recipe builds on from the previous recipe. Here we are going to create a replica of the primary server pg-primary and as we said we need two machines participating in this configuration. Our replica server will be titled pg-clone and the /data location will be our data directory.

How to do it...

All the following commands in this recipe are carried out in the replica server pg-clone. Here are the complete steps:

1. First log in as the Postgres user and generate a RSA key-pair and send the credentials to the primary server pg-primary:

           ssh-keygen -t rsa -N ' ' 
           ssh-copy-id postgres@pg-primary
   

2. In the next step, we are going to clone the data on the pg-primary server with the following command:

        ...