I tried to run a privileged Docker container with the Jenkins declarative pipeline (following this answer: https://stackoverflow.com/questions/52409836/how-to-run-a-privileged-docker-container-with-the-jenkins-declarative-pipeline), by passing the "privileged" flag to the inside() function.

The container is running but not in the privileged mode. Is there any way to make it work?

My pipeline config is like this:

stage('Test'){
  steps {
    script {
      docker.image(DOCKER_REGISTRY + ":$BUILD_NUMBER").inside("--privileged -v /var/run/docker.sock:/var/run/docker.sock")

{         sh '''. /usr/local/bin/test.sh'''       }

    }
  }
}