Adding the Flannel Network Plugin

On the master node, obtain the YAML file of the Flannel network plugin.

wget https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml --no-check-certificate

Install the Flannel network plugin on the master node.
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kubectl apply -f kube-flannel.yml
If the network plugin kube-flannel keeps trying to restart, sometimes the restart is normal, and sometimes "CrashLoopBackOff" or "OOMKilled" is displayed, try to resolve the problem by following instructions in Troubleshooting.

Parent topic: Installing Kubernetes