Cri File System Tools Install 【FREE - 2024】

This document explains what the CRI file system tools are, why you might need them, and provides clear, step-by-step installation instructions and usage tips for common environments. It assumes you want to install tools that let container runtimes (CRI-compatible) manage filesystems—such as utilities for mounting container rootfs, working with image layer storage, and integrating with container runtimes (containerd, cri-o). It focuses on Linux hosts (most common for CRI runtimes). Reasonable default choices are used where multiple options exist.

crictl inspect <container-id> | jq .info.runtimeSpec.mounts cri file system tools install

If you find orphaned overlay mounts (findmnt | grep overlay shows many old pods): This document explains what the CRI file system

# List container mounts still in kernel but not in CRI state
crictl ps -aq | xargs crictl inspect | jq '.info.pid' | xargs -I{} ls -l /proc/{}/mountinfo
docker run -it --privileged --rm alpine:edge sh -c "apk add criu crifs; crifs --help"

Note: The --privileged flag is required for filesystem and FUSE operations. Note: The --privileged flag is required for filesystem
crictl pods
crictl ps
crictl exec -it <container-id> df -h

If crictl exec fails (e.g., due to distroless images), use:
crictl inspect <container-id> | grep -A 5 "mounts"

Create /etc/crictl.yaml or ~/.config/crictl.yaml:
# For containerd
runtime-endpoint: "unix:///run/containerd/containerd.sock"
image-endpoint: "unix:///run/containerd/containerd.sock"
timeout: 10
debug: false

# For CRI-O
runtime-endpoint: "unix:///run/crio/crio.sock"

Test config: crictl ps -a