Pass argument to docker compose

Question

In my docker compose file there is a dynamic field which I\'d like to generate during the running. Actually it is a string template:

environment:
    - SERVE         


        

Answer 1

This is possible to with stack deploy

Example Compose File in your environment section:

- MY_VARIABLE_NAME=${MY_VARIABLE_VALUE}

Stack Deploy Command (I ran this from Gitbash in Windows):

MY_VARIABLE_VALUE=some-value docker stack deploy --compose-file compose_file_here stackname

Reference See this Github post here

Answer 2

In docker-compose, arguments are available and usefull only in dockerfile. You can specify what you are doing in the level ahead like following:

#dockerfile
ARG PORT
ENV SERVER_URL "https://0.0.0.0:$PORT"

Your port can be set in your docker-compose.yml:

build:
  context: .
  args:
    - PORT=443

It is actually an environment variable in any case. You can pass it through your run command if that fits to you:

PORT=443 docker-compose run <service>
#or
docker-compose run <service> -e PORT=443

Answer 3

You can use the flag when using docker-compose build

docker-compose build --build-arg PRODUCTION=VALUE

In Dockerfile you can get the argument PRODUCTION

# Dockerfile
ARG PRODUCTION
FROM node:latest

Answer 4

See this answer. You can do it like this: PORT=433 docker-compose <command>

You can even provide multiple values: PORT=433 MYIP='192.168.123.456' docker-compose <command>