Docker Plugin for Jenkins Pipeline - No user exists for uid 1005

Question

I\'m trying to execute an SSH command from inside a Docker container in a Jenkins pipeline. I\'m using the CloudBees Docker Pipeline Plugin to spin up the container and execute

Answer 1

The solution provided by @nathan-thompson is awesome, but in my case I was unable to find the user even in the /etc/passwd of the host machine! It means mounting the passwd file did not fix the problem. This question https://superuser.com/questions/580148/users-not-found-in-etc-passwd suggested some users are logged in the host using an identity provider like LDAP.

The solution was finding a way to add the proper line to the passwd file on the container. Calling getent passwd $USER on the host will provide the passwd line for the Jenkins user running the container.

I added a step running on the node (and not the docker agent) to get the line and save it in a file. Then in the next step I mounted the generated passwd to the container:

stages {
    stage('Create passwd') {
        steps {
            sh """echo \$(getent passwd \$USER) > /tmp/tmp_passwd
            """
        }
    }
    stage('Test') {
        agent {
            docker {
                image '*******'
                args '***** -v /tmp/tmp_passwd:/etc/passwd'
                reuseNode true
                registryUrl '*****'
                registryCredentialsId '*****'
            }
        }
        steps {
            sh """ssh -i ********
            """
        }
    }
}