CODEWITHSUNDEEP
docker
SimonaC
SimonaC

Reputation: 39

Override docker file string/variable from command line

The docker file that I am using have some variables that I need to modify, but from command line: (this is a part of the docker file)

 JAVA_OPTS: " 
    -Dsomething.something.port = 3333
    -Danother.something.port = 2222

Is there a way that I can use to override the port value, but from command line when I use docker-compose up? Thanks.

Upvotes: 0

Views: 223

Answers (1)

Marc ABOUCHACRA
Marc ABOUCHACRA

Reputation: 3463

To do that, you'll need to use a variable in your Dockerfile and then use a build-args in your docker-compose file.

For example :

# Dockerfile
ARG someport
ARG anotherport
JAVA_OPTS: " 
    -Dsomething.something.port = $someport
    -Danother.something.port = $anotherport

# docker-compose.yaml
build:
  context: .
  args:
    someport: 3333
    anotherport: 2222

During the build, the port value set in your compose file will be used.

You can find more about the use of variable (with an example) in the official doc.

Upvotes: 1

Related Questions