Automating Docker Updates: Watchtower vs Diun vs Manual Strategies

Automating Docker Updates: Watchtower vs Diun vs Manual Strategies Your homelab is running smoothly. Twenty containers, all humming along. Then a CVE drops for one of your images, and you realize you haven’t updated anything in three months. Docker containers don’t update themselves. Unlike desktop apps with auto-update prompts or Linux packages with apt upgrade, containers stay pinned to whatever image you pulled at deploy time. Without a strategy, your self-hosted stack slowly drifts into a graveyard of outdated software. ...

March 22, 2026 · 9 min · Self Host Setup

Self-Hosting Diun: Docker Image Update Notifications

Self-Hosting Diun: Docker Image Update Notifications You’re running twenty Docker containers. One of them just got a critical security patch upstream. How long until you notice? If you’re using Watchtower, the answer is “automatically — it’ll update itself.” But automatic updates aren’t always what you want. Maybe you run a database that needs careful migration steps. Maybe you’ve been burned by a breaking change at 3 AM. Maybe you just want to know before you act. ...

March 21, 2026 · 8 min · Self Host Setup