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Kubernetes and Cloud Native Associate · Linux Foundation
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CRI-O is the component responsible for running containers in a Kubernetes cluster. It is a lightweight container runtime that implements the Kubernetes Container Runtime Interface (CRI), allowing it to manage the lifecycle of containers efficiently.
B. CRI-O CRI-O is a lightweight container runtime specifically designed for Kubernetes. It implements the Kubernetes Container Runtime Interface (CRI) to enable the use of containers within Kubernetes clusters. It is responsible for running the containers specified by Kubernetes
Container Runtimes containerd is a lightweight and performant implementation to run containers. Arguably the most popular container runtime right now. It is used by all major cloud providers for the Kubernetes As A Service products. CRI-O was created by Red Hat and with a similar code base closely related to podman and buildah. Docker - The standard for a long time, but never really made for container orchestration. The usage of Docker as the runtime for Kubernetes has been deprecated and removed in Kubernetes 1.24.