Purpose

When using a Docker task in Bamboo to build a docker image, it may be desirable to pass and dereference Bamboo variables even when using an existing Dockerfile.

Solution

Use Docker build arguments:

• Docker: Set build time variables using --build-arg
• Dockerfile: ARG

It can be configured in Bamboo inside your Docker task configuration using the Additional Arguments field. Example below:

--build-arg VERSION=${bamboo.versionVariable}

ARG VERSION
RUN curl -L --silent https://packages.atlassian.com/maven-external/com/atlassian/bamboo/atlassian-bamboo/${VERSION}/atlassian-bamboo-${VERSION}.pom > /tmp/pom.xml