config

Docker cleanup timer with systemd

# Create /etc/systemd/system/docker-cleanup.timer with this content:

[Unit]
Description=Docker cleanup timer

[Timer]
OnUnitInactiveSec=12h

[Install]
WantedBy=timers.target

# And service file /etc/systemd/system/docker-cleanup.service:

[Unit]
Description=Docker cleanup
Requires=docker.service
After=docker.service

[Service]
Type=oneshot
WorkingDirectory=/tmp
User=root
Group=root
ExecStartPre=-/bin/bash -c 'docker ps -aqf status=exited | xargs docker rm -v'
ExecStartPre=-/bin/bash -c 'docker images -qf dangling=true | xargs docker rmi -f' 
ExecStart=/bin/docker ps -af status=exited

[Install]
WantedBy=multi-user.target
# run systemctl enable docker-cleanup.timer for enabling the timer