Share Docker socket via socat

README.md

In general this action is extremely insecure (you know what are you doing, right?)

export DEV_USER=jenkins
export DEV_UID=1000
export DEV_GID=1000

socat -d -d UNIX-LISTEN:/home/"${DEV_USER}"/.docker/docker_socket,fork,user="${DEV_UID}",group="${DEV_GID}",mode=777 UNIX-CONNECT:/var/run/docker.sock

export DOCKER_HOST=unix:///home/${DEV_USER}/.docker/docker_socket

# /etc/systemd/system/docker-socat.service
[Unit]
Description=Docker socket socat
After=docker.service
Requires=docker.service

[Service]
Type=simple
StandardOutput=syslog
StandardError=syslog
SyslogIdentifier=docker-socat
Environment=DEV_USER=jenkins
Environment=DEV_UID=1000
Environment=DEV_GID=1000
ExecStart=socat -d -d UNIX-LISTEN:/home/${DEV_USER}/.docker/docker_socket,fork,user=${DEV_UID},group=${DEV_GID},mode=777 UNIX-CONNECT:/var/run/docker.sock
Restart=always

[Install]
WantedBy=multi-user.target

jenkins:
  environment:
    - DOCKER_HOST=tcp://socat:2375
  networks:
    - jenkins

socat:
  image: alpine/socat
  command: TCP4-LISTEN:2375,fork,reuseaddr UNIX-CONNECT:/var/run/docker.sock
  volumes:
    - /var/run/docker.sock:/var/run/docker.sock
  networks:
    - jenkins

Reference docker/for-mac#4755