Okay, so we have dockerized our django app and we need to run a
manage.py command for some task. How do we do that? Simple, we have to locate the container that runs the django app, login and then run the command.
Locate The Container
It’s very likely that our app uses multiple containers to compose the entire system. For exmaple, I have one container running MySQL, one container running Redis and another running the actual Django app. If we want to run
manage.py commands, we have to login to the one that runs Django.
While our app is running, we can find the running docker containers using the
docker ps command like this:
$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
308f40bba888 crawler_testscript "/sbin/my_init" 31 hours ago Up 3 seconds 5000/tcp crawler_testscript_1
3a5ccc872215 crawler_web "bash run_web.sh" 31 hours ago Up 4 seconds 0.0.0.0:8000->8000/tcp crawler_web_1
14f0e260fb2c redis:latest "/entrypoint.sh redis" 31 hours ago Up 4 seconds 0.0.0.0:6379->6379/tcp crawler_redis_1
252a7092870d mysql:latest "/entrypoint.sh mysql" 31 hours ago Up 4 seconds 0.0.0.0:3306->3306/tcp crawler_mysql_1
In my case, I am using Docker Compose and I know my Django app runs using the
crawler_web image. So we note the name of the container. In the above example, that is –
Nice, now we know which container we have to login to.
Logging Into The Container
We use the name of the container to login to it, like this:
docker exec -it crawler_web_1 bash
The command above will connect us to the container and land us on a bash shell. Now we’re ready to run our command.
Running the command
cd into the directory if necessary and then run the management command.
python manage.py <command>
docker psto list running containers and locate the one
docker exec -it [container_name] bashto login to the bash shell on that container
cdto the django project and run
python manage.py [command]