CRI-O Playground

This environment is set up for learning how to work with CRI-O — a lightweight container runtime specifically designed for Kubernetes, implementing the Container Runtime Interface (CRI).

🔧 System Components

• cri-o: The core CRI-compatible container runtime daemon.
• runc/crun: Low-level OCI runtime implementations.
• conmon: Container monitoring tool that handles container lifecycle.

🛠️ Tools

• crictl: The primary CLI for interacting with CRI-O and other CRI-compatible runtimes.

🎯 Getting Started

Pull and list images

crictl pull hello-world:latest

crictl images

Run containers

# Create a pod first (CRI-O works with pods)
crictl runp pod-config.yaml

# Run container in the pod
crictl create <pod-id> container-config.yaml pod-config.yaml
crictl start <container-id>

Manage pods

# List pods
crictl pods

# Create a pod
crictl runp pod-config.yaml

# Stop and remove a pod
crictl stopp <pod-id>
crictl rmp <pod-id>

📚 Learn More

• CRI-O docs: https://cri-o.io/
• crictl reference: https://kubernetes.io/docs/tasks/debug/debug-cluster/crictl/
• CRI specification: https://github.com/kubernetes/cri-api
• crictl help: crictl --help

🧩 Related Content

🧪 Playgrounds

• contaiNERD CTL (official)

Happy learning! 🚀