PruneMate

PruneMate is a lightweight web interface that automates Docker resource cleanups on a configurable schedule. It provides prune previews, reporting, and optional authentication to help manage unused containers, images, networks, volumes and build cache across one or more Docker hosts.

Key Features

• Flexible scheduling: Daily, weekly or monthly automated prune runs, plus an option for manual-only mode.
• Prune preview: Shows which containers, images, networks, volumes and build cache will be removed before executing a prune.
• Multi-host support: Manage multiple Docker hosts from one UI (remote hosts require a socket proxy).
• Selective cleanup: Enable or disable specific resource types (containers, images, networks, volumes, build cache) per run.
• Reporting & statistics: All-time cumulative statistics for space reclaimed and resources deleted, with detailed run logs.
• Notifications: Integrations for Gotify, ntfy.sh, Discord and Telegram to receive prune results.
• Multi-architecture Docker images and simple Docker Compose or Docker Run deployment.

Use Cases

• Keep developer or CI/CD Docker hosts from filling up by scheduling regular automated prune jobs and tracking reclaimed space.
• Provide a safe manual review workflow for operators to preview and approve prunes on production-adjacent hosts.
• Centralize cleanup across multiple runner or edge hosts, with notifications for each run to maintain visibility.

Limitations and Considerations

• PruneMate executes Docker's native prune operations; volumes and other resources Docker considers "unused" may be removed, which can cause data loss if volumes contain important data — review previews carefully before running.
• Requires access to the Docker socket (/var/run/docker.sock) for host control; exposing the socket introduces a broad privilege/security risk and should be protected with appropriate network and host controls.
• Designed as a lightweight scheduler/UI; it does not provide advanced cluster orchestration or deep container lifecycle management features beyond prune operations and reporting.

PruneMate is a practical tool for teams and hobbyists who want a minimal web UI to schedule, preview and track Docker cleanup jobs. It is distributed as a Docker image and configured primarily via environment variables and a small configuration directory for logs and persisted state.