Issue

• We need to overwrite the ENTRYPOINT of our CJE Agent Docker images.

Environment

• CloudBees Jenkins Enterprise (CJE) - AWS/OpenStack/Anywhere
• CloudBees Jenkins Enterprise - Managed Master (CJE-MM)
• CloudBees Jenkins Enterprise - Operations Center (CJE-OC)

Resolution

With the following Dockerfile and entrypoint.sh. The agent starts successfully, and the entrypoint is executed, allowing any required customization.

Dockerfile

FROM openjdk:latest

ADD entrypoint.sh .
RUN chmod ugo+rwx /entrypoint.sh

ENTRYPOINT ["/entrypoint.sh"]

entrypoint.sh

#!/bin/bash
if [ $# -gt 0 ]
then
  # first argument is the custom docker command shell provided by plugin
  # second argument is the java command line generated by the plugin (passed as a single arg)
  shift
  exec /bin/sh -c "$@"
fi

Then in the Docker Agent Template configuration:

Customizing Build Environments

Tested product/plugin versions

• CloudBees Jenkins Enterprise 1.11.2 (CJE)