Container runtime

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The software responsible for running the containers, is called (elementary my dear Watson)  the container runtime.

Common container runtimes include containerd, CRI-O, Docker Engine, and the Mirantis Container Runtime.

Stuff you wanna know:

  1. You need to install a container runtime into each node in the cluster so that Pods can run there.
  2. Kubernetes releases before v1.24 included a direct integration with Docker Engine, using a component named dockershim. Kubernetes 1.24 requires that you use a runtime that conforms with the Container Runtime Interface (CRI).