go install github.com/google/crfs/stargz/crfs@latest
While not a part of the core CRI toolset, is worth mentioning due to its close relationship with the /proc file system. CRIU allows you to freeze a running application and checkpoint its entire state to disk as a collection of files, which can later be restored to resume execution. The checkpoint process relies heavily on the /proc file system, gathering information from /proc/$pid/fd (file descriptors), /proc/$pid/maps (memory maps), and other process-specific pseudo-files.
Tools like cri-o and containerd are beginning to integrate checkpoint/restore capabilities, and crictl already includes a checkpoint command to facilitate this functionality. cri file system tools link
The CRI plugin for containerd is configured via the main configuration file ( /etc/containerd/config.toml ) within the [plugins."io.containerd.grpc.v1.cri"] section. Adjusting container root directories here gives fine-grained control over how the CRI exposes filesystem resources to the runtime.
Containerd implements CRI via cri plugin, which uses: go install github
Common issues involve cgroup manager configuration mismatches (e.g., systemd vs. cgroupfs). File System Specifics (CRI-O)
: Official utilities distributed by CRI Middleware to compile and verify .CPK virtual filesystems. Tools like cri-o and containerd are beginning to
The key takeaway is that symbolic links are not mere shortcuts; they are of container storage. Their proper creation, use, and maintenance ensure that container images are built correctly, runtimes are efficient, and debugging is straightforward. By mastering the tools described in this guide—the CRI tools in cri-tools , the native clients of the runtimes, and the symlink management strategies—you will be well-equipped to diagnose and resolve even the most esoteric filesystem issues in your container environment.
When you download an official build of the CRI File System Tools package , you do not just get one software executable. You receive an entire ecosystem of software utilities tailored for various environments: