Unable to connect application user to acid-minimal-cluster due to pg_hba.conf

Please, answer some short questions which should help us to understand your problem / question better?

• *registry.opensource.zalan.do/acid/postgres-operator:v1.9.0
• Where do you run it - cloud or metal? Kubernetes or OpenShift? [microk8s VM]
• Are you running Postgres Operator in production? [no, not yet]
• Type of issue? [issue with application connection.]

The operator is working fine, and most likely something I need to configure: I've created a simple two-node cluster (acid-minimal-cluster) and specified an application user which can connect locally, but not through the service with the error:

psql -U project_victor app-db-name -W -h acid-minimal-cluster-repl
Password: 
psql: error: connection to server at "acid-minimal-cluster-repl" (10.152.183.203), port 5432 failed: FATAL:  password authentication failed for user "project_victor"
connection to server at "acid-minimal-cluster-repl" (10.152.183.203), port 5432 failed: FATAL:  pg_hba.conf rejects connection for host "10.1.76.169", user "project_victor", database "app-db-name", no encryption

What do I need to specify so that the user is allowed to connect through the service?

Start by reviewing the acid-minimal-cluster configuration and the application user settings described in the issue, then compare the local connection with the service connection and the reported pg_hba.conf error. Done means identifying the missing configuration that permits project_victor to connect through acid-minimal-cluster-repl and verifying the connection succeeds.