Docker Hub is a container image registry for developers to find, use, and share container images.
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Diun sends notifications when an image is updated on a Docker registry.
About Diun
Diun (Docker Image Update Notifier) keeps track of container image updates without requiring manual registry checks. It checks tracked images on a schedule, detects when a tag or digest has changed, and notifies you when something new is available, which helps surface upstream base image rebuilds and application releases.
It can run as a single executable or as a Docker image, discovers images through providers including Docker, Containerd, Kubernetes, Swarm, Nomad, Dockerfile and File, and sends notifications through services such as Gotify, Mail, Slack and Telegram. Notification delivery and watcher monitoring via Healthchecks depend on those external services, and no pricing information is given on the page.
Key features
- Watches container images and reports changed tags or digests
- Include and exclude filters for tracked tags
- Scheduled checks with no external cron job required
- Discovers images from Docker, Containerd, Kubernetes, Swarm, Nomad, Dockerfile, File
- Sends notifications via Gotify, Mail, Slack, Telegram and more
- Runs as a single binary or the official Docker image
- Healthchecks integration to monitor the watcher itself
Best for: Teams and individuals who want automatic notice of Docker image updates instead of watching registries by hand.
Good for
- Detects tag or digest changes on a schedule you configure
- Supports several image providers and notification channels
- Can be deployed as a single binary or a Docker image
Watch out for
- No pricing information is stated on the page
- Notifications and self-monitoring rely on external services such as messaging providers and Healthchecks
Diun at a glance
- Website
- crazymax.dev/diun
- Category
- Development › DevOps & Containers
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Diun FAQ
How does Diun detect image updates?
It checks your images on a schedule and detects when a tracked tag or digest has changed, then notifies you.
Which container sources can Diun discover images from?
Docker, Containerd, Kubernetes, Swarm, Nomad, Dockerfile and File providers.
How can Diun be installed and run?
As a single executable or as the official Docker image.
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