双节点master集群搭建

安装stream组件

yum install -y nginx-mod-stream

添加如下配置信息到nginx.conf

stream {

    server {

        listen 8443;

        proxy_pass kube_apiserver;

    }

    upstream kube_apiserver {

        server xxx.xxx.xxx.1:6443 weight=50 max_fails=3 fail_timeout=5s;

        server xxx.xxx.xxx.2:6443 weight=50 max_fails=3 fail_timeout=5s;       

    }

}

生成kubeadm-config.yaml文件

kubeadm config print init-defaults > kubeadm-config.yaml

修改advertiseAddress值为当前msater宿主机ip

添加imageRepository，controlPlaneEndpoint，kubernetesVersion

kind: ClusterConfiguration

imageRepository: registry.cn-hangzhou.aliyuncs.com/google_containers

controlPlaneEndpoint: "xxx.xxx.xxx.xxx:8443"

kubernetesVersion: v1.18.8

networking:

  podSubnet: 10.244.0.0/16

复制如下文件到新增的master节点上

/etc/kubernetes/pki/ca.crt

/etc/kubernetes/pki/ca.key

/etc/kubernetes/pki/front-proxy-ca.crt

/etc/kubernetes/pki/front-proxy-ca.key

/etc/kubernetes/pki/sa.key

/etc/kubernetes/pki/sa.pub

/etc/kubernetes/pki/etcd/ca.crt

/etc/kubernetes/pki/etcd/ca.key

/etc/kubernetes/admin.conf

集群init

kubeadm init --config=kubeadm-config.yaml

获取join node或master信息，添加--control-plane表示加入master节点

kubeadm token  create --print-join-command

kubeadm join xxx.xxx.xxx.1:8443 --token abcdef.0123456789abcdef    --discovery-token-ca-cert-hash sha256:339919e578460d78985432351cac8c6d05400ff3ba530177b307d49f9783b48f    --control-plane

卸载k8s相关组件

yum erase -y kubelet kubeadm kubectl kubernetes-cni