Why this error, docker operational error (django project)?

Question

Error Type: django.db.utils.OperationalError

django.db.utils.OperationalError: could not translate host name "db" to address: Name or service not known

changes i made in settings.py file

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

changes i made in dockor-compose.yml file

version: '3.7'

services:
  web:
    build: .
    command: python /code/manage.py runserver 0.0.0.0:8000
    volumes:
    - .:/code
    ports:
    - 8000:8000
    depends_on:
    - db
  db:
    image: postgres:11

It looks like there's indentation issue. web as well as db should be preceded with two spaces in this case. — magma
– magma, Commented Apr 14, 2020 at 16:05
What are you running that produces that error? (Are you attempting to run migrations from a Dockerfile, for example?) — David Maze
– David Maze, Commented Apr 14, 2020 at 16:12
after making changes in database (as shown in above settings.py file) i installed psycopg2 (by using this command -> docker-compose exec web pipenv install psycopg2-binary==2.8.4) then i used "docker-compose down" command then i ran this command --> docker-compose up -d --build. But It didnt loaded my local host page 127.0.0.1:8000 and when in tried to run migrations it generated above error. Also the indendation is not the issue i uploaded it wrongly but now i updated that. — Yash Marmat
– Yash Marmat, Commented Apr 14, 2020 at 16:18

Yash Marmat · Accepted Answer · 2020-04-23 17:13:47Z

3

I solved it finally!

got sorted out just needed to place envioronments in docker-compose.yml file. In the following manner

version: '3.7'

services:
  web:
    build: .
    command: python /code/manage.py runserver 0.0.0.0:8000
    volumes:
    - .:/code
    ports:
    - 8000:8000
    depends_on:
    - db
  db:
    image: postgres:11
    environment:
    - "POSTGRES_HOST_AUTH_METHOD=trust"

answered Apr 23, 2020 at 17:13

Yash Marmat

1,20512 silver badges20 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Tareq Monwer Over a year ago

environment: - "POSTGRES_HOST_AUTH_METHOD=trust" What do these lines mean?

Yash Marmat Over a year ago

@TareqMonwer the environment variable basically handles the user information like username and password. Its upto you to define those fields manually in the evironment or can just pust the code which i used (which does not require any authentication check).

Collectives™ on Stack Overflow

Why this error, docker operational error (django project)?

1 Answer 1

I solved it finally!

2 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

I solved it finally!

2 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related