Use Jenkins variable in Dockerfile command

Question

I am new to Docker and Jenkins. I have to build and deploy Nest Js app in jenkins. When I run the Jenkins job I have to select the 'DEPLOY_PROFILE' which is equals to 'dev' and 'qa' as follows.

This is my Dockerfile,

    FROM node:16-alpine
    WORKDIR /app
    ADD package.json /app/package.json
    RUN npm config set registry http://registry.npmjs.org
    RUN npm install
    ADD . /app
    EXPOSE 3000
    CMD ["npm", "run", "start"]

I need to pass the 'DEPLOY_PROFILE' variable which is equals to 'dev' or 'qa' to the Dockerfile. Then final docker command should be look like npm run start:dev or npm run start:qa

I have tried using

CMD ["npm", "run", "start", `:${DEPLOY_PROFILE}`]

and

CMD ["npm", "run", "start", `:${env.DEPLOY_PROFILE}`]

But nothing gave me the luck. Any help may highly appreciated!

Answer 1

You can use an environment variable for that. In your dockerfile, declare an argument (passed into docker build) and an environment variable like this:

ARG DEPLOY_PROFILE
ENV PROFILE=${deploy_profile}

Then use the environment variable like this:

CMD npm run start $PROFILE

Then call buildah (or whatever you are using) like this:

 buildah bud --format=docker --build-arg deploy_profile="$DEPLOY_PROFILE"