Using Spock to Add a Node to a Cluster

There are several ways to add a node to a cluster; the way that you choose should depend on the use and state of your cluster:

• Manually Adding a Node with Zero Downtime

You can manually add a node to your cluster with zero downtime; follow the steps outlined here for details.

• Adding a Node to a Replicating Cluster with Minimal Downtime

You can safely add a node to a replicating cluster with minimal interruption to your cluster with pgBackRest; the technique is outlined here.

• Adding a Node to a Replicating Cluster with spockctrl

You can use the spockctrl utility to add a node to a production cluster with zero-downtime. This method is appropriate for production clusters that can't be taken out of production, but that need to replace nodes or expand their cluster to include new nodes.

• Adding a Subscriber Node to an Empty Cluster

You can use pg_basebackup to add a node to an empty cluster and start it as a Spock subscriber. This method is a good way to quickly increase the size and distribution of an empty cluster that is still in development; it is not recommended for production clusters.