Docker-compose v2 expose port to machine - django

Question

I used to use v1 of docker-compose to run a set of services and then use the dev serve of Django to connect to them. I used to connect to the services (such as a db) with the <machine_ip>:<port> (smt like 192.168.99.100:5432 for postgres)
Now, i just installed docker for mac, and v1 is not working. I moved to version 2 but Django complains that there's no service listening to the port 5432. As far as I understood it's a problem of the network, but I can't get my head around on how to configure it. In theory a default network is created for all the services within the compose, which is fine in general but not for my case. I use compose to spin up a set of services to connect to my local execution of django.
this is my docker-compose file
version: '2'
services:
db:
image: postgres:9.4
volumes_from:
- data
ports:
- "5432:5432"
es:
image: elasticsearch:2.3
ports:
- "9200:9200"
- "9300:9300"
rabbit:
image: rabbitmq:3
ports:
- "5672:5672"
- "48429:48429"
data:
# use this that is already downloaded
# links just to keep the db
image: alpine:3.3
command: echo 'Data Container for PostgreSQL'
volumes:
- /var/lib/postgresql/data
networks:
default:
driver: bridge
and in my django conf
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.postgresql_psycopg2',
'NAME': 'postgres',
'USER': 'postgres',
'HOST': '192.168.99.100', # 'localhost',
'PORT': '5432' # '6543'
},
}
where 192.168.99.100 is the docker-machine ip
the result is
django.db.utils.OperationalError: could not connect to server: Connection refused
Is the server running on host "192.168.99.100" and accepting
TCP/IP connections on port 5432?
any help on how I can expose all these ports to the machine ip?

Answer 1

Try to use dockers internal network features to let the container talk to each other.
version: '2'
services:
db:
image: postgres:9.4
volumes:
- datavolume_postgres:/var/lib/postgresql/data
ports:
- "5432:5432"
es:
image: elasticsearch:2.3
ports:
- "9200:9200"
- "9300:9300"
rabbit:
image: rabbitmq:3
ports:
- "5672:5672"
- "48429:48429"
depends_on:
- "db"
# Named volume
volumes:
datavolume_postgres: {}
#You dont need to specify the default network
and in your django.conf
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.postgresql_psycopg2',
'NAME': 'postgres',
'USER': 'postgres',
'HOST': 'db', # 'localhost',
'PORT': '5432' # '6543'
},
}
I don't know on what es depends bu i hope you get the Point
FYI depends_on reference