Kubernetes 部署 Nginx 集群

一.设置标签
为了保证nginx之能分配到nginx服务器需要设置标签，设置标签可以让Pod选择该服务器部署
#设置标签 key为type 的 value为nginx
# kubectl label node k8s-node1  type=nginx
# kubectl label node k8s-node2  type=nginx
#查看标签
# kubectl get node --show-labels


二.创建nginx-deployment的yaml文件
nginx-deployment.yaml

### define deployment info ###
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: nginx-deployment
  namespace: default
  labels:
    app: nginx
### define pod info ###
spec:
# define the pod count
  replicas: 2
  revisionHistoryLimit: 5  #保存5个历史版本
# select the pod which is controlled
  selector:
    matchLabels:
      app: nginx
# define the pod
  template:
    metadata:
# define the pod label,which must be same with selector's matchLabels
      labels:
        app: nginx
        env: dev
        tie: front
### define container info ###
    spec:
      containers:
# define the container name
      - name: nginx
        image: nginx:1.17.5
        imagePullPolicy: IfNotPresent
        volumeMounts:
        - name: conf
          mountPath: /etc/nginx
        - name: opt
          mountPath: /opt
      #node label selector
      nodeSelector:
        type: nginx
      volumes:
      - name: conf
        hostPath:
          path: /etc/nginx
          type: Directory
      - name: opt
        hostPath:
          path: /opt
          type: Directory


三、应用启动
# kubectl create -f nginx-deployment.yaml

# kubectl get pod -o wide

四.创建nginx-service的yaml文件

nginx-service.yaml

apiVersion: v1
# delcare it's service
kind: Service
metadata:
  name: nginx-service
  labels:
    app: nginx
spec:
  externalIPs:
  - 192.168.10.80
  - 192.168.10.81
  - 192.168.10.82
  ports:
# define the service's port
  - port: 80
    name: nginx-service-80 
    protocol: TCP
# define the container's port
    targetPort: 80
# nodePort 对应 type: NodePort
#    nodePort: 30080  
# define the pod label which the selector match with
  selector:
    app: nginx
# three type : ClusterIP,NodePort,LoadBalancer
  type: ClusterIP

 
五、应用启动
# kubectl create -f nginx-service.yaml

# kubectl get service -o wide

六、访问Nginx
http://192.168.10.81


附录：
查找.yaml 的所有文件
find / -name *.yaml