Docker sock mount approach to run Jenkins as a Docker container

docker-compose.jenkins-sock.yml

# This docker-compose file intent to run a Jenkins container connected to the host machine Docker daemon.
#
# A discussion about potential security issues and improvements on this approach can be found at:
# https://forums.docker.com/t/using-docker-in-a-dockerized-jenkins-container/322/11
# 
# Source: http://jpetazzo.github.io/2015/09/03/do-not-use-docker-in-docker-for-ci/

version: '3.1'

volumes:
    jenkins-data:

services:

  jenkins:
    image: jenkinsci/blueocean
    restart: always
    ports:
      - 8080:8080
      - 50000:50000
    tty: true
    volumes:
      - jenkins-data:/var/jenkins_home
      - /var/run/docker.sock:/var/run/docker.sock