How to Free Disk Space by Removing Cache and Orphaned Containers in Docker

🚀 Cómo solucionar el error paso a paso

Paso 1: Ejecutar una limpieza de datos inactivos y volúmenes huérfanos

The prune command removes unused images, networks, and stopped containers. To force the removal of orphaned volumes that are no longer associated with any active container, run:

# Limpieza profunda de bajo impacto de recursos inactivos
docker system prune -a --volumes -f

Paso 2: Localizar y vaciar archivos de registro (Logs) saturados

Containers that constantly print info to console generate logs in JSON format that can take up hundreds of gigabytes. Use this quick terminal script to identify the size of the logs and truncate them immediately without stopping your services:

# Listar y vaciar logs JSON acumulados en la ruta raíz de Docker
find /var/lib/docker/containers/ -name "*-json.log" -exec du -sh {} +

# Truncar logs a tamaño cero
sudo find /var/lib/docker/containers/ -name "*-json.log" -exec sh -c 'cat /dev/null > "{}"' \;

🛡️ Consejo de Prevención

Recommended safety practices:

• Prevent containers from accumulating log files uncontrollably on your local storage. Always configure automatic log rotation globally by adding limit parameters in the Docker daemon file (/etc/docker/daemon.json) before deploying your services:
  JSON Copy

  {
    "log-driver": "json-file",
    "log-opts": {
      "max-size": "10m",
      "max-file": "3"
    }
  }