How to deploy and manage units
Basic Usage
To deploy a single unit of PgBouncer using its default configuration
juju deploy pgbouncer-k8s --trust --channel 1/stable
It is customary to use PgBouncer in HA setup. Hence usually more than one unit (preferably an odd number to prohibit a “split-brain” scenario) is deployed. To deploy PgBOuncer in HA mode, specify the number of desired units with the -n option.
juju deploy pgbouncer-k8s --trust --channel 1/stable -n <number_of_replicas>
Scaling
Both scaling-up and scaling-down operations are performed using juju scale-application:
juju scale-application pgbouncer-k8s <desired_num_of_units>
Tip: scaling-down to zero units is supported to safe K8s resources!