Support passing POSTGRES_INITSCRIPTS_PASSWORD from k8s secret

[james64]

Name and Version

bitnami/postgres:latest

What is the problem this feature will solve?

This is the list of environment variables passed to primary statefulset which contains passwords:

• POSTGRES_PASSWORD
• POSTGRES_POSTGRES_PASSWORD
• POSTGRES_REPLICATION_PASSWORD
• POSTGRES_INITSCRIPTS_PASSWORD
• POSTGRES_LDAP_BIND_PASSWORD

All of these have the value passed in via valueFrom.secretKeyRef as it should be. All of them except POSTGRES_INITSCRIPTS_PASSWORD which is passed by value directly in sts yaml definition.

What is the feature you are proposing to solve the problem?

Add support for passing password directly or as pre-existing secret. When passed directly add it to some secret and reference it in sts yaml using valueFrom.secretKeyRef. Standard stuff which already works for the rest of pg_pswd env vars.

What alternatives have you considered?

It is possible to pass the password as part of primary.extraEnvVarsSecret. But that still means that primary.initdb.password should be updated as suggested above or removed as not useful.