The CRI does not mandate a specific filesystem layout. However, every CRI implementation must manage a and a state directory , both of which rely heavily on filesystem tools.
# Find the top 10 largest container rootfs directories du -sh /var/lib/containerd/io.containerd.snapshotter.v1.overlayfs/snapshots/*/fs | sort -h
cri-dockerd translates CRI requests into Docker Engine API calls. Filesystem impact:
# Get PID: 12345 nsenter -t 12345 -m # You are now INSIDE the container's filesystem from the host. cri file system tools link
Before diving into CRI file system tools and links, it's essential to understand the basics of CRI. The Container Runtime Interface (CRI) is a plugin interface that allows Kubernetes to interact with different container runtimes, such as Docker, rkt, or cri-o. CRI provides a standardized way for Kubernetes to create, manage, and monitor containers, making it possible to use various container runtimes with the platform.
If you have a "link" or download for these tools, the workflow generally follows these steps:
systemctl stop kubelet containerd umount /var/lib/containerd fsck.ext4 -y /dev/sdb1 # Assuming /var/lib sits here mount /var/lib/containerd systemctl start containerd kubelet The CRI does not mandate a specific filesystem layout
Both ctr and nerdctl allow you to inspect snapshots —the filesystem layers that make up a container. Snapshotters are the components that manage these container filesystems. You can see available plugins with ctr plugins ls or nerdctl info . This is critical for understanding where container layers are stored and how they are linked.
Disclaimer: Ensure you comply with the EULA of any game you are modding, as modifying proprietary archives can violate terms of service.
Extracting .acb (Audio Container) or .hca (High-Quality Compressed Audio) files. Filesystem impact: # Get PID: 12345 nsenter -t
The is a proprietary file management and virtualization technology developed by CRI Middleware, primarily used in the video game industry. If you’ve ever modded a game like Persona , Sonic the Hedgehog , or Street Fighter , you’ve likely encountered .cpk files—the core archive format handled by these tools.
crictl allows administrators to check pod status, inspect image layers, and view container logs directly on a node without using the Kubernetes API server.