run jenkins pipeline agent with sudo

Question

I have an Jenkins Server running in an docker container and have access to docker an the host system, so far it is working well. Now I want to set up a pipeline testing an s

Answer 1

What worked for me was

node() {
    String jenkinsUserId = sh(returnStdout: true, script: 'id -u jenkins').trim()
    String dockerGroupId = sh(returnStdout: true, script: 'getent group docker | cut -d: -f3').trim()
    String containerUserMapping = "-u $jenkinsUserId:$dockerGroupId "
    docker.image('image')
        .inside(containerUserMapping + ' -v /var/run/docker.sock:/var/run/docker.sock:ro') {
             sh "..."
         }
}

This way the user in the container still uses the jenkins user id + group id to avoid permissions conflicts with shared data but is also member of the docker group inside container which is required to access the docker socket (/var/run/docker.sock)

I prefer this solution as it doesn't require any additional scripts or dockerfiles