Create a test process holding open a file:
By default, crictl needs to know which CRI runtime socket to connect to.
crictl --version crictl info (shows runtime configuration)
The upperdir is where all write changes to the container are stored. Go there: cri file system tools install
sudo apt update sudo apt install -y git curl build-essential pkg-config fuse-overlayfs
: A validation tool used to test CRI image and runtime file system conformance.
To view all stored container images along with their uncompressed sizes on the disk: crictl images Use code with caution. Calculating Container Writable Layer Disk Usage Create a test process holding open a file:
For CriFS (often not in default repos), add the OCI community PPA or build from source (see Method 3).
The represent a powerful suite designed for developers and system administrators working with the Container Runtime Interface (CRI). Installing these tools allows for low-level manipulation, inspection, and debugging of container file systems outside of standard high-level orchestrators like Kubernetes. Feature Highlight: One-Line Precision Deployment
A Comprehensive Guide to Installing CRI File System Tools (crictl) To view all stored container images along with
Example: umoci to unpack image rootfs
To see what files have been modified or written to a container's read-write layer during its execution:
: Engines like ctr or nerdctl (for containerd) that offer deep, low-level access to the underlying snapshotters and storage overlays (e.g., OverlayFS). System Requirements and Prerequisites