docker-compose

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Volumes

To enable auto-reload one needs to make use of volumes.

Volumes will act as a reference to a local folder. keep in mind: this is different from the COPY cmd you use in Dockerfile. Volume will most likely replace what COPY has done.

Without volume

• docker-compose up

• Edit your local ./project/views.py

• Refresh your browser

• Nothing happens

• You need to docker-compose down-up.

With volume

• docker-compose up

• Edit you local file

• Refresh your browser

• You should see your changes

A note regarding the reference thing

With your containers running, try the following:

change any file - even outside project folder like requirements.txt

# bash into the app container
$ docker exec -it docker-compose_app_1 sh
$ cat requirements.txt

# new line added while the container was running
Django>=3.0,<4.0
psycopg2-binary>=2.8
redis==3.5.3