April 2018
Intermediate to advanced
468 pages
14h 34m
English
Content preview from Mastering Kubernetes - Second Edition
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The Container Runtime Interface (CRI)
The CRI is a gRPC API, containing specifications/requirements and libraries for container runtimes to integrate with kubelet on a node. In Kubernetes 1.7, the internal Docker integration in Kubernetes was replaced with a CRI-based integration. This is a big deal. It opened the door to multiple implementations that take advantage of advances in the field of container. The Kubelet doesn't need to interface directly with multiple runtimes. Instead, it can talk to any CRI-compliant container runtime. The following diagram illustrates the flow:
There are two gRPC service interfaces—ImageService and RuntimeService ...
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