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kubeadm.md

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Deploying kube-router with kubeadm

Please follow the steps to install Kubernetes cluster with Kubeadm, however must specify --pod-network-cidr when you run kubeadm init.

kube-router relies on kube-controller-manager to allocate pod CIDR for the nodes.

kube-router provides pod networking, network policy and high perfoming IPVS/LVS based service proxy. Depending on your choice to use kube-router for service proxy you have two options.

kube-router Providing Pod Networking and Network Policy

For the step #3 Installing a Pod network add-on install a kube-router pod network and network policy add-on with the following command:

KUBECONFIG=/etc/kubernetes/admin.conf kubectl apply -f https://raw.githubusercontent.com/cloudnativelabs/kube-router/master/daemonset/kubeadm-kuberouter.yaml

kube-router Providing Service Proxy, Firewall and Pod Networking

For the step #3 Installing a Pod network add-on install a kube-router pod network and network policy add-on with the following command:

KUBECONFIG=/etc/kubernetes/admin.conf kubectl apply -f https://raw.githubusercontent.com/cloudnativelabs/kube-router/master/daemonset/kubeadm-kuberouter-all-features.yaml

Now since kube-router provides service proxy as well. Run below commands to remove kube-proxy and cleanup any iptables configuration it may have done.

KUBECONFIG=/etc/kubernetes/admin.conf kubectl -n kube-system delete ds kube-proxy

To cleanup kube-proxy we can do this with docker, containerd, or cri-o:

docker

docker run --privileged -v /lib/modules:/lib/modules --net=host registry.k8s.io/kube-proxy-amd64:v1.28.2 kube-proxy --cleanup

containerd

ctr images pull k8s.gcr.io/kube-proxy-amd64:v1.28.2
ctr run --rm --privileged --net-host --mount type=bind,src=/lib/modules,dst=/lib/modules,options=rbind:ro \
    registry.k8s.io/kube-proxy-amd64:v1.28.2 kube-proxy-cleanup kube-proxy --cleanup

cri-o

crictl pull registry.k8s.io/kube-proxy-amd64:v1.28.2
crictl run --rm --privileged --net-host --mount type=bind,src=/lib/modules,dst=/lib/modules,options=rbind:ro
    registry.k8s.io/kube-proxy-amd64:v1.28.2 kube-proxy-cleanup kube-proxy --cleanup