Registry ui
Registry UI — Executive Summary¶
The Registry UI provides a web interface for browsing and managing images stored in the Docker Registry. It makes it easier to inspect tags, delete images, and see digest information without using the CLI.
Technology Deep Dive (The "What")¶
Registry UI projects typically use a lightweight web frontend that communicates with a Docker Registry backend. The UI offers convenience features such as tag lists, tag details, and deletion controls. Although the registry exposes a REST API, a graphical interface reduces errors and provides a human-friendly view of stored repositories.
Core terms include repository, tag, digest and pagination; the UI calls registry endpoints to fetch catalogs and tag lists and displays them in a browser.
This approach is common because managing images solely via the CLI is error-prone; a UI helps teams audit and manage image lifecycles more safely.
Service Implementation (The "Why Here")¶
In Signapse, the registry UI offers an accessible way to view and manage images in the local registry. A developer can quickly verify that a CI build pushed the expected tags, or remove obsolete images when disk usage grows.
Example: After a successful build, open the registry UI to confirm the new tag exists and view its content digest.
Usage Guide (The "How")¶
Run the registry UI container and open the web interface.
# Start registry UI
docker compose -f notebooks/docker-compose.yml up -d registry-ui
# Open the UI at
open http://localhost:5001
Configuration Reference
| Variable | Default Value | Description |
|---|---|---|
| SINGLE_REGISTRY | true | Single registry mode for the UI |
| REGISTRY_TITLE | Docker Registry UI | Display title for the UI |
| DELETE_IMAGES | true | Whether the UI allows deletion of images |
Access
The UI runs on port 5001 and is reachable at http://localhost:5001 when running locally.
Connections (The Ecosystem)¶
The Registry UI connects directly to the Docker Registry API and usually runs beside it. Users and CI systems interact with the registry; the UI is a convenience that makes inspection and management easier.
flowchart LR
User --> RegistryUI[Registry UI]
RegistryUI --> Registry[(Docker Registry)]