Docker-compose: See what environmental variables are set within a container

Question

I have a django-cookiecutter project that has multiple containers:

• django
• postgres
• caddy
• etc

When I deploy, I'm getting an error that the Postgres db cannot authenticate the POSTGRES_USER and POSTGRES_PASSWORD.

I'm passing the envs in my production.yml file as:

services:
  django: &django
    build:
      context: .
      dockerfile: ./compose/production/django/Dockerfile
    image: authible_production_django
    depends_on:
      - postgres
      - redis
    env_file:
      - ./.envs/.production/.django
      - ./.envs/.production/.postgres
    command: /gunicorn.sh

Question:

Since the service is not able to authenticate, how can I check the envs within one of these containers?

I want to make sure the envs are being recognized.

Thank you for your help-

Answer 1

You can simply execute env inside the container using docker-compose:

docker-compose exec django env