containrrr/watchtower
★ 24,616 stars
Covered in week 2026-W31 · the 2026-07 report
A process for automating Docker container base image updates.
What watchtower is
With watchtower you can update the running version of your containerized app simply by pushing a new image to the Docker Hub or your own image registry.
From the repository README · read it on GitHub →
Transcript
Running Docker containers means checking base images manually, pulling updates during production hours, and restarting services hoping nothing breaks. Watchtower monitors your containers, pulls new images automatically, and swaps them with zero downtime. It tracks multiple containers, respects maintenance windows, and sends webhook notifications when updates finish. With 24,000 stars on GitHub, DevOps engineers trust this for hands-free container maintenance. Would you automate your containers with this?