NAS-118354 / 22.12 / Fix root user not exist error in nextcloud postgres logs

[Qubad786]

Context

Before starting nextcloud container, we waited on postgres container to be active and responsive so we use pg_isready utility to determine that. However we had erroneous logs being logged in that case which do not affect application usability but were still being logged

2022-09-29T19:59:30.454167564Z 2022-09-29 19:59:30.454 UTC [1] LOG:  database system is ready to accept connections
2022-09-29T19:59:32.102969839Z 2022-09-29 19:59:32.102 UTC [84] FATAL:  password authentication failed for user "root"
2022-09-29T19:59:32.103024478Z 2022-09-29 19:59:32.102 UTC [84] DETAIL:  Role "root" does not exist.
2022-09-29T19:59:32.103041832Z 	Connection matched pg_hba.conf line 99: "host all all all md5"

It seems this is an upstream issue and we can workaround it by explicitly defining which database we are going to connect to peter-evans/docker-compose-healthcheck#16.

Solution

Refactor pg_isready command to explicitly list down database which we will be connecting to which results in the erroneous logs not being logged for postgres.

[bugclerk]

Jira URL: https://ixsystems.atlassian.net/browse/NAS-118354