Linking django and mysql containers using docker-compose

Question

I\'ve been following with the docker-compose tutorial here (linking django and postgres container). Although I was able to go through with the tutorial I\'m however not able

Answer 1

First you need to modify the settings file...

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql_psycopg2',
        'NAME': 'postgres',
        'USER': 'postgres',
        'HOST': 'db',
        'PORT': 5432,
    } }

Then if you used the docker-compose command properly, the containers should be linked, and it should resolve the hostname db properly based on the links in the docker-compose.yml file.

Still, if you want to check the environment...

~/django-example: docker-compose run web env
Starting djangoexample_db_1...
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
HOSTNAME=66ff09ed8632
TERM=xterm
DJANGOEXAMPLE_DB_1_PORT=tcp://172.17.0.35:5432
DJANGOEXAMPLE_DB_1_PORT_5432_TCP=tcp://172.17.0.35:5432
DJANGOEXAMPLE_DB_1_PORT_5432_TCP_ADDR=172.17.0.35
DJANGOEXAMPLE_DB_1_PORT_5432_TCP_PORT=5432
DJANGOEXAMPLE_DB_1_PORT_5432_TCP_PROTO=tcp
DJANGOEXAMPLE_DB_1_NAME=/djangoexample_web_run_2/djangoexample_db_1
DJANGOEXAMPLE_DB_1_ENV_affinity:container==52c78c810792b0e7b9a231eab7ab7a3d50c95b76faf0abb8ec38a7d1ff0c7e5f
DJANGOEXAMPLE_DB_1_ENV_LANG=en_US.utf8
DJANGOEXAMPLE_DB_1_ENV_PG_MAJOR=9.4
DJANGOEXAMPLE_DB_1_ENV_PG_VERSION=9.4.4-1.pgdg70+1
DJANGOEXAMPLE_DB_1_ENV_PGDATA=/var/lib/postgresql/data
DB_PORT=tcp://172.17.0.35:5432
DB_PORT_5432_TCP=tcp://172.17.0.35:5432
DB_PORT_5432_TCP_ADDR=172.17.0.35
DB_PORT_5432_TCP_PORT=5432
DB_PORT_5432_TCP_PROTO=tcp
DB_NAME=/djangoexample_web_run_2/db
DB_ENV_affinity:container==52c78c810792b0e7b9a231eab7ab7a3d50c95b76faf0abb8ec38a7d1ff0c7e5f
DB_ENV_LANG=en_US.utf8
DB_ENV_PG_MAJOR=9.4
DB_ENV_PG_VERSION=9.4.4-1.pgdg70+1
DB_ENV_PGDATA=/var/lib/postgresql/data
DB_1_PORT=tcp://172.17.0.35:5432
DB_1_PORT_5432_TCP=tcp://172.17.0.35:5432
DB_1_PORT_5432_TCP_ADDR=172.17.0.35
DB_1_PORT_5432_TCP_PORT=5432
DB_1_PORT_5432_TCP_PROTO=tcp
DB_1_NAME=/djangoexample_web_run_2/db_1
DB_1_ENV_affinity:container==52c78c810792b0e7b9a231eab7ab7a3d50c95b76faf0abb8ec38a7d1ff0c7e5f
DB_1_ENV_LANG=en_US.utf8
DB_1_ENV_PG_MAJOR=9.4
DB_1_ENV_PG_VERSION=9.4.4-1.pgdg70+1
DB_1_ENV_PGDATA=/var/lib/postgresql/data
LANG=C.UTF-8
PYTHON_VERSION=2.7.10
PYTHON_PIP_VERSION=7.0.3
PYTHONUNBUFFERED=1
HOME=/root