部署一个简单的springboot服务，有个restful接口，如下:

    List-1

mjduan@mjduan-host:/opt/software/tool/virtualbox-vagrant/master$ curl http://192.168.33.10:30002/person/1{"id":1,"name":"name=1","address":"address"}mjduan@mjduan-host:/opt/software/tool/virtualbox-vagrant/master$

1、NodePort方式暴露端口

    我们将这个springboot部署到k8s上，制作镜像就不描述了，k8s的yaml文件如下，之后执行"kubectl  apply  -f  k8s-demo.yaml"，就可以了。

    List-1.1  k8s-demo.yaml

apiVersion: v1kind: Servicemetadata:  name: k8s-learn-service  namespace: default  labels:    app: k8s-learn-servicespec:  type: NodePort  ports:  - port: 8080    nodePort: 30002  selector:    app: k8s-learn-service---apiVersion: apps/v1kind: Deploymentmetadata:  name: k8s-learn-deployment  labels:    app: k8s-learn-deploymentspec:  replicas: 1  selector:    matchLabels:      app: k8s-learn-service  template:    metadata:      labels:        app: k8s-learn-service    spec:      containers:      - name: k8s-learn-container1        image: k8s-learn:1.0        imagePullPolicy: IfNotPresent        ports:        - containerPort: 8080        volumeMounts:         - mountPath : /opt/applog          name: my-volume      volumes:      - name: my-volume        emptyDir: {}

2、ClusterIP方式，用Ingress暴露端口

    NodePort方式，是直接暴露端口，这种方式不是很好。ClusterIP方式，集群外是访问不了的，我们用Ingress方式来暴露端口，如下:

    List-2.1 k8s-demo.yaml

apiVersion: v1kind: Servicemetadata:  name: k8s-learn-service  namespace: default  labels:    app: k8s-learn-servicespec:  type: ClusterIP  ports:  - port: 8080  selector:    app: k8s-learn-service---apiVersion: apps/v1kind: Deploymentmetadata:  name: k8s-learn-deployment  labels:    app: k8s-learn-deploymentspec:  replicas: 1  selector:    matchLabels:      app: k8s-learn-service  template:    metadata:      labels:        app: k8s-learn-service    spec:      containers:      - name: k8s-learn-container1        image: k8s-learn:1.0        imagePullPolicy: IfNotPresent        ports:        - containerPort: 8080        volumeMounts:         - mountPath : /opt/applog          name: my-volume      volumes:      - name: my-volume        emptyDir: {}

    之后执行"kubectl  apply  -f k8s-demo.yaml"，之后查看该服务:

    List-2.2

[root@master springboot]# kubectl get servicesNAME                               TYPE           CLUSTER-IP       EXTERNAL-IP                                 PORT(S)                          AGE...k8s-learn-service                  ClusterIP      10.107.55.103    
    
                                           8080/TCP                         3m...
    

    之后创建用于ingress，如下

    List-2.3  springboot-ingress.yaml

apiVersion: extensions/v1beta1kind: Ingressmetadata:  name: apps-springbootspec:  rules:  - host: springboot-ui    http:      paths:      - path: /        backend:          serviceName: k8s-learn-service          servicePort: 8080

    执行"kubectl  apply  -f  springboot-ingress.yaml "，查看ingress状态：

    List-2.4

[root@master springboot]# kubectl get ingressNAME               HOSTS           ADDRESS   PORTS     AGEapps-springboot    springboot-ui             80        17m

    之后在你本地/etc/hosts中加入"k8s的任一节点IP  springboot-ui"，在浏览器中访问"http://springboot-ui/person/12"