Inject AWS Codebuild Environment Variables into Dockerfile

Question

Is there a way to pass AWS Codebuild environment variables into a Dockerfile? I'd like to be able to pull from ECR like this:

FROM $My_AWS_ACCOUNT.dkr.ecr.us-east-1.amazonaws.com/someimage:latest

Where $My_AWS_ACCOUNT references an environment variables within my codebuild project.

Answer 1

Yes, you can use FROM ${My_AWS_ACCOUNT}.xxx. My_AWS_ACCOUNT should be passed as an argument to the docker build. This is how I would do it:

ARG My_AWS_ACCOUNT=SOME_DEFAULT_IMAGE FROM ${My_AWS_ACCOUNT}.xxx

When you build: docker build --build-arg My_AWS_ACCOUNT=${My_AWS_ACCOUNT}