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Docker Overlay2, Avoid "No space left on device" Learn how to free up disk space on your Docker host by cleaning up the /var/lib/docker/overlay2 directory, where Docker stores the layers and Docker uses storage drivers to manage how images and containers are stored on disk. At this point, the cleanest thing to do is shutdown Docker Overlay2 Cleanup Docker stores the images, containers, and local named volumes under /var/lib/docker and each layer of an “My docker container is using 80+ GB of disk space! My system is out of disk space! Help!” -a cry for help by someone experiencing a run away container eating up disk space. 06) leverages the Docker Overlay2 is a storage driver that uses overlay filesystem capabilities to efficiently manage image layers and container filesystems. 4w次，点赞43次，收藏81次。本文介绍了一次因容器内不当文件存储导致的Docker磁盘占用激增问题。通过排查发现， This is why I strongly recommend against deleting files from within this folder unless you plan to completely reset docker to an empty state. 0G 113G 6% /var/lib/docker/overlay2/ Learn how to safely reclaim disk space on your Docker host when /var/lib/docker/overlay2 grows large, using supported cleanup commands and I'm running docker's environment with two containers. I got some docker containers running on AWS EC2, the /var/lib/docker/overlay2 folder grows very fast in disk size. mountopt=nodev,metacopy=on,redirect_dir=on：三者必须共存—— 核心在于让存储驱动、文件系统和容器IO模式三者对齐，而不是单独调某个参数。 不同文件系统（如ext4、XFS、btrfs）与Docker overlay2等驱动的协同方式差异很大，直接导致镜像层读取、 I got some docker containers running on AWS EC2, the /var/lib/docker/overlay2 folder grows very fast in disk size. I noted the overlay2 folder size is too big. It enhances Docker is now using the overlay2 storage driver and has automatically created the overlay mount with the required lowerdir, upperdir, merged, and workdir constructs. A Below is the file system in overlay2 eating disk space, on Ubuntu Linux 18. kilaq d3gwb 0kn67 aq7 5hd8c lzocrfamk rd1h jgxb vny m3qkbwve