Create K8s high availability cluster With HAProxy
Preparation
To setup a k8s cluster, I will prepare 4 machines with the following network setting:
| hostname | ip | role |
|---|---|---|
| gm-mini | 192.168.31.199 | HAProxy |
| gm-red | 192.168.31.200 | k8s master |
| gm-green | 192.168.31.201 | k8s master |
| gm-blue | 192.168.31.202 | k8s worker |
| gm-orange | 192.168.31.203 | k8s worker |
1. create master on gm-red
sudo kubeadm init \
--apiserver-advertise-address=192.168.31.200 \
--image-repository=registry.aliyuncs.com/google_containers \
--kubernetes-version=v1.29.0 \
--service-cidr=10.96.0.0/12 \
--pod-network-cidr=10.244.0.0/16 \
--cri-socket=unix:///run/containerd/containerd.sock \
--control-plane-endpoint=192.168.31.199:6443 \
--upload-certs
2. Apply CNI network plugin
kubectl apply -f https://github.com/flannel-io/flannel/releases/latest/download/kube-flannel.yml
3. Join as control-panel nodes (gm-green)
sudo kubeadm join 192.168.31.199:6443 \
--token 7yszg3.su99ir6t8m9o8ttr \
--discovery-token-ca-cert-hash sha256:xxxx \
--control-plane \
--certificate-key yyyyy
4. Join as worker node (gm-blue, gm-orange)
sudo kubeadm join 192.168.31.199:6443 \
--token aaa.bbb \
--discovery-token-ca-cert-hash sha256:xxxx