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Kubernetes Container Runtime Interface (CRI)

1 post · Jul 2019

What this trail covers

The Kubernetes Container Runtime Interface (CRI) standardizes the interaction between kubelet and container runtimes, enabling Kubernetes to support multiple runtimes beyond Docker. Compliance with OCI specifications and passing CRI validation tests are key requirements. Popular CRI implementations include containerd and cri-o.

All IBM trails
  1. An overview of the Kubernetes Container Runtime Interface (CRI)This post provides an overview of the Kubernetes Container Runtime Interface (CRI), explaining its purpose in standardizing container runtime interactions for kubelet. It details the evolution from Docker as the default runtime to the need for a stable interface, the role of OCI specifications (runtime and image format), and the validation tests required for CRI compliance. It also briefly introduces containerd and cri-o as CRI implementations and mentions dockershim.