Jenkins docker container overrides with "--entrypoint cat" ...

[Eric Tan]

Hi,

Is there a way to prevent Jenkin from overriding the entrypoint specified in the container image? 

As shown below in the console output, Jenkins adds "--entrypoint cat" which overrides my own entrypoint.

$ docker run -t -d -u 1000:1000 -w /var/jenkins_home/workspace/Test_Pipeline_master-K2ZSF4WTA --volumes-from db477ccfb5f8261f85de03 -e ******** -e ******** -e ******** --entrypoint cat test-app

docker inspect shows:

            "Entrypoint": [
                "cat"
            ],

The original image is 

            "Entrypoint": [
                "python",
                "test-app.py"
            ],

[Eric Tan]

https://issues.jenkins-ci.org/browse/JENKINS-39748

[nicolas de loof]

docker.inside NEED some way to run a docker container in some "wait" mode, so the use of the `cat` command.

if your entrypoint script do follow docker recommendations it should detect use of such a command and enventually execute it, but real world experience demonstrated many people don't follow this recommendation, and as such the container failed to start as expected / stopped immediately. But the "fix" to override entrypoint is worst imho

Feel free to comment on https://github.com/jenkinsci/docker-workflow-plugin/pull/85 

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