What is the process for authenticating an npm registry within a Docker container in Visual Studio Team Services (VSTS)?

I am currently working on setting up a Docker Compose build task for my Node.js project on VSTS. As we are transitioning to using a private npm registry on VSTS, it has become crucial for the Docker container to authenticate with the registry in order to download packages.

Is there a method to securely pass VSTS credentials to the Docker container so that it can access the private npm registry during the build process?

One solution I considered was embedding VSTS's generated npm credentials into the project's .npmrc file. However, this approach still resulted in failures during the VSTS build, presenting an error message of "401 Unauthorized" when running yarn install:

An unexpected error occurred: ": Request failed \"401 Unauthorized\"".

Answer №1

One method to securely store a token is by adding it to the secret variable in VSTS build. From there, you can assign this value to an environment variable using docker-compose (-e xx=xx).

Learn how to set environment variables with ‘docker-compose run’ here

This approach enables you to utilize the environment variable for updating the .npmrc file within Docker.

An alternative option is to update the .npmrc file prior to invoking docker-compose during the VSTS build process.

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