Last month, on the morning of April 28th, I woke up to a "Disk Space Critical" email from my own VPS. When I ran df -h , I saw that the / directory was 100% full. As I suspected, Docker was the culprit again. When managing over 13 containers on the same server, if even one gets out of control, it's only a matter of time before the entire system goes into swap and gets OOM-killed. This situation is familiar to anyone who constantly struggles with disk storage issues, hosting multiple applications on their own server. In this post, I'll explain how I manage these "Docker Disk Storage Wars" on my own VPS, how I ensure data integrity, and how I optimize disk space. My goal is to guide you with practical solutions and experiences I've personally had. Why Do Docker Disk Storage Wars Erupt? My VPS's disk space suddenly filling up has almost become a routine for me. Most of the time, the root of the problem lies in unexpected container log growth, unnecessary images, or build caches.…