将 ARG 从 docker-compose.yml 传递给 docker 镜像

Question

So I have a NodeJS API which I have created, which contains a Private NPM package in the package.json.

I have the following Docker files in this project:

Dockerfile

FROM node:10

WORKDIR /usr/src/app
ARG NPM_TOKEN
COPY .npmrc ./  
COPY package.json ./
RUN npm install  
RUN rm -f ./.npmrc
COPY . .

CMD [ "npm", "start" ]

.npmrc

//registry.npmjs.org/:_authToken=${NPM_TOKEN}

I have managed to build this API by running the command:

docker build --build-arg NPM_TOKEN=${MY_NPM_TOKEN} -t api:1.0.0 .

This successfully builds the image.

In my main application, I have a docker-compose.yml which I want to run this image.

version: '3' services: redis: container_name: redis image: redis:3.2.8 ports: - "6379:6379" volumes: - ./data:/data api: container_name: api image: api:1.0.0 build: context: . args: - NPM_TOKEN={MY_NPM_TOKEN} ports: - "3001:3001"

When I run docker-compose up it fails with the error:

Failed to replace env in config: ${NPM_TOKEN}

Does anyone have an idea, why my image is not taking in the ARG that is passed?

Answer 1

From my understanding, you are trying to pass the NPM_TOKEN arguments from the environment variable named MY_NPM_TOKEN .

However, there is an error in the syntax that you should update your docker-compose.yaml file

from - NPM_TOKEN={MY_NPM_TOKEN}

to - NPM_TOKEN=${MY_NPM_TOKEN}