Remove stale Docker images and stopped containers in Kamal deployments.
npx skills add https://github.com/donnfelker/kamal-skills --skill prune-donnfelker
Please help me install this Agent Skill. Skill: prune Source: https://github.com/donnfelker/kamal-skills/tree/main/skills/prune Command: npx skills add https://github.com/donnfelker/kamal-skills --skill prune-donnfelker
This skill solves the issue of disk space exhaustion on servers caused by the accumulation of old, unused Docker images and stopped containers generated during the Kamal deployment lifecycle.
Ask the agent to prune all unused images and stopped containers to free up disk space on the server.
High-intent search queries and answers about installing and using this skill.
To free up disk space from old Docker containers after Kamal redeployments, you can use an automated cleanup process that safely removes unused images and stopped containers while respecting retention policies to preserve rollback availability.
The best way to clean up unused Docker images on a Kamal deployment server is to prune stale, unreferenced container layers and images, which optimizes server storage capacity without affecting the current production environment.
Yes, you can configure how many previous Kamal releases are kept during container pruning by setting the retain_containers configuration key, which ensures a specified number of recent releases remain available for rollback.
Your server runs out of disk space during Kamal deployments because the deployment lifecycle accumulates old, unused Docker images and stopped containers on the server over time, which eventually exhausts available storage.
No, pruning stopped Docker containers does not affect your current production environment in Kamal, because the cleanup process implements retention logic to preserve recent releases while only targeting stale, unreferenced container layers.
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