mirror of https://github.com/kevinveenbirkenbach/computer-playbook.git synced 2025-11-26 06:43:10 +00:00

Files

Kevin Veen-Birkenbach a312f353fb Refactor JVM memory filters, add Redis sizing and Docker cleanup service

- Replace jvm_filters with unified memory_filters (JVM + Redis helpers)
- Add redis_maxmemory_mb filter and unit tests
- Introduce sys-ctl-cln-docker role (systemd-based Docker prune + anon volumes)
- Refactor disk space health check to Python script and wire SIZE_PERCENT_CLEANUP_DISC_SPACE
- Adjust schedules and services for Docker cleanup and disk space health

See discussion: https://chatgpt.com/share/6925c1c5-ee38-800f-84b6-da29ccfa7537

2025-11-25 15:50:27 +01:00

README.md

Cleanup Docker Resources

Description

This role performs a complete cleanup of Docker resources by invoking a systemd-managed script. It removes unused Docker images, stopped containers, networks, build cache, and anonymous volumes. The cleanup is fully automated and can run on a schedule or be triggered manually.

Overview

Optimized for maintaining a clean and efficient Docker environment, this role:

Loads and triggers the anonymous volume cleanup role.
Installs a systemd service and timer for Docker pruning.
Deploys a cleanup script that invokes:
- The anonymous volume cleanup service.
- docker system prune -a -f to remove unused Docker resources.
Allows forced execution during maintenance runs (MODE_CLEANUP).

Purpose

The primary purpose of this role is to prevent storage bloat caused by unused Docker images, volumes, and build artifacts. Regular pruning ensures:

Reduced disk usage
Improved system performance
Faster CI/CD and container deployments
More predictable Docker engine behavior

Features

Anonymous Volume Cleanup: Integrates with sys-ctl-cln-anon-volumes to remove stale volumes.
Full Docker Prune: Executes docker system prune -a -f to reclaim space.
Systemd Integration: Registers a systemd unit and timer for automated cleanup.
Scheduled Execution: Runs daily (or as configured) based on SYS_SCHEDULE_CLEANUP_DOCKER.
Force Execution Mode: When MODE_CLEANUP=true, cleanup is executed immediately.
Safe Execution: Includes validation for missing services and Docker availability.

Script Behavior

The cleanup script:

Checks whether the anonymous volume cleanup service is defined and available.
Starts the service if present.
Runs docker system prune -a -f if Docker is installed.
Stops execution immediately on errors (set -e behavior).