Appendix C. Installing a CNI in a kind cluster
This appendix shows you how to install a new CNI in your kind cluster. We’ll install Flannel and Calico, which are both used for the CKA exam, going through the process step by step on how to do this within a kind cluster. This involves creating the kind cluster without a CNI, installing the bridge CNI plugin, and then installing either Flannel or Calico.
C.1 Creating a kind cluster without CNI
Before we create a kind Kubernetes cluster, we must first create a YAML file that we can use as an input with the kind create command. Create a file named config.yaml and paste it in the contents like this:
kind: Cluster apiVersion: kind.x-k8s.io/v1alpha4 networking: disableDefaultCNI: true nodes: role: control-plane role: worker
Now run the command kind create cluster --image kindest/node:v1.25.0-beta.0 --config config.yaml to create a kind cluster according to the configuration we specified in the config.yaml file. The output will look similar to this: