K
Q

Default CRI implementation and default CNI implementation in K8S

5/12/2020

Recently I am looking at the knowledge of CRI and CNI. What are the default CRI implementation and default CNI implementation in K8S?

-- Long.zhao
kubernetes

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2 Answers

5/12/2020

There is no such thing as default CRI implementation and default CNI implementaton.

It all depends on the Kubernetes distribution you're using.

For example, GKE has its own CNI implementation but nothing prevents you to use Calico.

-- Marc ABOUCHACRA
Source: StackOverflow
5/12/2020

  1. Regarding the CRI the most common are:

    • Docker

    • CRI-O

    • Containerd

The most 'default' one being Docker.

  1. Regarding the CNI:

Network plugins in Kubernetes come in a few flavors:

  • CNI plugins: adhere to the appc/CNI specification, designed for interoperability

  • Kubenet plugin: implements basic cbr0 using the bridge and host-local CNI plugins

Currently Calico is the only CNI plugin that the kubeadm project performs e2e tests against. You can find more info about installing a Pod network here.

Please let me know if that helped.

-- OhHiMark
Source: StackOverflow