Initialize第一个kubernetes master

查看VIP在那个master节点

ip a 
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether de:28:f4:1d:ac:b4 brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.101/22 brd 192.168.3.255 scope global noprefixroute dynamic eth0
       valid_lft 49750sec preferred_lft 49750sec
    inet 192.168.1.100/22 scope global secondary eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::dc28:f4ff:fe1d:acb4/64 scope link noprefixroute
       valid_lft forever preferred_lft forever
3: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default
    link/ether 02:42:7c:a8:e1:8e brd ff:ff:ff:ff:ff:ff
    inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
       valid_lft forever preferred_lft forever

可以看到 101虚拟ip 和 100的ip maser-01的节点上

kubeadm配置文件

vim kubeadm-config.yaml
apiServer:
  certSANs:
    - k8s-master-01
    - k8s-master-02
    - master.k8s.io
    - 192.168.1.100
    - 192.168.1.101
    - 192.168.1.102
    - 127.0.0.1
  extraArgs:
    authorization-mode: Node,RBAC
  timeoutForControlPlane: 4m0s
apiVersion: kubeadm.k8s.io/v1beta1
certificatesDir: /etc/kubernetes/pki
clusterName: kubernetes
controlPlaneEndpoint: "master.k8s.io:16443"
controllerManager: {}
dns: 
  type: CoreDNS
etcd:
  local:    
    dataDir: /var/lib/etcd
imageRepository: registry.aliyuncs.com/google_containers
kind: ClusterConfiguration
kubernetesVersion: v1.13.10
networking: 
  dnsDomain: cluster.local  
  podSubnet: 10.20.0.0/16
  serviceSubnet: 10.10.0.0/16
scheduler: {}

配置说明：

imageRepository： registry.aliyuncs.com/google_containers (阿里云镜像源)

podSubnet： 10.20.0.0/16 (pod地址池)

serviceSubnet： 10.10.0.0/16

初始化第一个master节点

kubeadm init --config kubeadm-config.yaml 
# out log:
Your Kubernetes master has initialized successfully!

To start using your cluster, you need to run the following as a regular user:

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

You should now deploy a pod network to the cluster.
Run "kubectl apply -f [podnetwork].yaml" with one of the options listed at:
  https://kubernetes.io/docs/concepts/cluster-administration/addons/

You can now join any number of machines by running the following on each node
as root:

  kubeadm join master.k8s.io:16443 --token dm3cw1.kw4hq84ie1376hji --discovery-token-ca-cert-hash sha256:f079b624773145ba714b56e177f52143f90f75a1dcebabda6538a49e224d4009

配置kubectl环境变量

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

查看组件状态

kubectl get cs
NAME                 STATUS    MESSAGE              ERROR
controller-manager   Healthy   ok                   
scheduler            Healthy   ok                   
etcd-0               Healthy   {"health": "true"}