K8s 公网部署集群

BackGroud

在公网环境下，或者需要跨局域网组成集群下。需要让Master以公网IP启动，而kubeadm init 参数启动，只支持局域网。

Deploy

获取配置文件kubead config default > k8s-init.yaml，localAPIEndpoint.advertiseAddress就是公网IP地址

最新使用 kubeadm config print init-defaults > k8s-init.yaml

apiVersion: kubeadm.k8s.io/v1beta2
bootstrapTokens:
- groups:
  - system:bootstrappers:kubeadm:default-node-token
  token: abcdef.0123456789abcdef
  ttl: 24h0m0s
  usages:
  - signing
  - authenticationi
kind: InitConfiguration
localAPIEndpoint:
  advertiseAddress: 121.36.210.8
  bindPort: 6443
nodeRegistration:
  criSocket: /var/run/dockershim.sock
  taints:
  - effect: NoSchedule
    key: node-role.kubernetes.io/master
---
apiServer:
  timeoutForControlPlane: 4m0s
apiVersion: kubeadm.k8s.io/v1beta2
certificatesDir: /etc/kubernetes/pki
clusterName: kubernetes
controllerManager: {}
dns:
  type: CoreDNS
etcd:
  local:
    dataDir: /var/lib/etcd
    extraArgs:
      listen-client-urls: "https://127.0.0.1:2379,https://127.0.0.1:2379"
      listen-peer-urls: "https://127.0.0.1:2380"
imageRepository: registry.aliyuncs.com/google_containers
kind: ClusterConfiguration
kubernetesVersion: v1.21.14
networking:
  dnsDomain: cluster.local
  serviceSubnet: 10.96.0.0/12
  podSubnet: 10.244.0.0/16

启动集群
kubeadm init --config k8s-init.yaml

mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config

查看是否正确，cat /root/.kube/config,的IP和配置文件。