Once finished, the tool will provide a log confirming the number of files packed and the final archive size.
# Find the top 10 largest container rootfs directories du -sh /var/lib/containerd/io.containerd.snapshotter.v1.overlayfs/snapshots/*/fs | sort -h cri file system tools link
The Container Runtime Interface (CRI) serves as the primary abstraction layer between Kubernetes’ kubelet and container runtimes (e.g., containerd, CRI-O). Among its core functions, file system management—including image mounting, rootfs preparation, and volume isolation—is critical for workload security and performance. This paper systematically reviews the file system toolchains associated with CRI, focusing on cri-tools (crictl, critest), cri-dockerd , and underlying filesystem helpers ( cri-fs , cri-umount ). We analyze how these tools interact with Linux namespaces, overlayfs, and FUSE to provide ephemeral and persistent storage. Empirical benchmarks compare mount latency and isolation overhead across runtimes. The paper concludes with best practices for debugging CRI filesystem issues and future directions for filesystem-level CRI extensions. Once finished, the tool will provide a log