I have been running my own postgres helm chart with read replication and pgpool2 for three years and never had major trouble. If you're interested check out https://github.com/sspies8684/helm-repo
Curious after quick look: how come the primary container (pg upstream image) has a volume for the replica which doesn't seem used and the replica (custom image which wipes $PGDATA at start) has no host volume (hence data is in the container)? (very possible I've missed something)
