Correct setings for pg_hba.conf - postgresql

Question

Having difficulty getting Mezzanine to connect to Postgresql via Docker
In my postgresql.conf I have:
listen_addresses = '*'
In my pg_hba.conf I have:
# Database administrative login by Unix domain socket
local all postgres peer
# TYPE DATABASE USER ADDRESS METHOD
# "local" is for Unix domain socket connections only
local all all peer
# IPv4 local connections:
host all all 127.0.0.1/32 md5
# IPv6 local connections:
host all all ::1/128 md5
# Allow replication connections from localhost, by a user with the
# replication privilege.
#local replication postgres peer
#host replication postgres 127.0.0.1/32 md5
#host replication postgres ::1/128 md5
host all all samenet trust
host all all 0.0.0.0/0 md5
The error I keep getting is:
could not connect to server: Connection refused
Is the server running on host "127.0.0.1" and accepting
TCP/IP connections on port 5432?
I have PORT in settings.py set to '' but I have PORT defined in postgresql.conf to 5432.
Any suggestions?

Answer 1

Ensure that port mapping is properly configured https://docs.docker.com/userguide/dockerlinks/
If your app is running in one container and postgresql server is running in another container, you need to link containers together.
By the way you are trying to establish connection via localhost and you have md5 authentication method there. For debug purposes change authentication method to trust. You should EDIT this line in your pg_hba.conf NOT to ADD another line.
host all all 127.0.0.1/32 md5
The best way to debug connection issues is to use psql utility.