GTF GTF - 1 year ago 191
Node.js Question

docker build + private NPM (+ private docker hub)

I have an application which runs in a Docker container. It requires some private modules from the company's private NPM registry (Sinopia), and accessing these requires user authentication. The Dockerfile is

FROM iojs:latest

I have tried:

1) creating an .npmrc file in the project root, this actually makes no difference and npm seems to ignore it
2) using env variables for
etc., but the user doesn't log in.

Essentially, I seem to have no way of authenticating the user within the
docker build
process. I was hoping that someone might have run into this problem already (seems like an obvious enough issue) and would have a good way of solving it.

(To top it off, I'm using Automated Builds on Docker Hub (triggered on push) so that our servers can access a private Docker registry with the prebuilt images.)

Are there good ways of either:
1) injecting credentials for NPM at build time (so I don't have to commit credentials to my Dockerfile) OR
2) doing this another way that I haven't thought of

Answer Source

I found a somewhat elegant-ish solution in creating a base image for your node.js / io.js containers (you/iojs):

  1. log in to your private npm registry with the user you want to use for docker
  2. copy the .npmrc file that this generates

Example .npmrc:

  1. create a Dockerfile that copies the .npmrc file appropriately.

Here's my Dockerfile (based on iojs:onbuild):

FROM iojs:2.2.1


# Exclude the NPM cache from the image
VOLUME /root/.npm

# Create the app directory
RUN mkdir -p /usr/src/app
WORKDIR /usr/src/app

# Copy npm config
COPY .npmrc /root/.npmrc

# Install app
ONBUILD COPY package.json /usr/src/app/
ONBUILD RUN npm install
ONBUILD COPY . /usr/src/app

# Run
CMD [ "npm", "start" ]
  1. Make all your node.js/io.js containers FROM you/iojs and you're good to go.
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