Now add a CNI (Container Network Interface) plugin. I use Weave as my CNI of choice, with secure communication
kubectl create secret -n kube-system generic weave-passwd --from-literal=weave-passwd=$(hexdump -n 16 -e '4/4 "%08x" 1 "\n"' /dev/random)
kubectl apply -n kube-system -f "https://cloud.weave.works/k8s/net?k8s-version=$(kubectl version | base64 | tr -d '\n')&password-secret=weave-passwd"If using Calcio
On Each Node:
sed -i 's/^#net.ipv4.ip_forward=1/net.ipv4.ip_forward=1/' /etc/sysctl.conf
sysctl -p /etc/sysctl.conf
kubectl apply -f https://docs.projectcalico.org/v3.8/manifests/calico.yaml