Watchtower on a Mac

Auto-update running Docker containers; watched on your servers · Containers

Watchtower watches your running containers and pulls and restarts them when a new image is published. It is free, open-source software (Apache 2.0) with no paid edition. The original project, containrrr/watchtower, was archived in December 2025 (last release 1.7.1) and doesn't work with Docker Engine 29 and later; the maintained fork nickfedor/watchtower (github.com/nicholas-fedor/watchtower) takes the same options. FrontierStack finds Watchtower on every linked server and reads its settings and log over SSH: when it last scanned, how many containers it updated and how many failed, its schedule and mode. It alerts when Watchtower stops, when Docker refuses its API version, when updates fail, or when scans stop arriving, and flags servers still on the archived image.

Run Watchtower with FrontierStack

Install or connect Watchtower; then check its status, ports and certificate from FrontierStack. The same screen links to firewall checks and backups where they apply.

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