dubbo服務在kubernetes中對外暴露服務

一些場景下，在開發時可能存在dubbo consumer須要訪問k8s中部署的dubbo provider,尤爲是對於自建的kubernetes集羣環境，tcp的端口很難代理，這就致使了開發發連接集羣內的服務比較麻煩，這裏能夠利用service將dubbo服務使用nodeport暴露出去，可是因爲dubbo默認註冊的ip地址是自動獲取服務的ip地址來註冊的，ip地址是pod的ip地址，集羣外是沒法訪問的。幸運的是dubbo提供了自動義指定註冊ip的配置，咱們能夠在部署開發聯調服務時指定ip地址爲宿主機的ip地址。部署例子以下：

# -------------------Service ---------------------- #
apiVersion: v1
kind: Service
metadata:
 name: java-test-svc
 namespace: default
spec:
 type: NodePort
 ports:
 - port: 30011
   targetPort: 30011
   nodePort: 30011
 selector:
  app: java-test
  tier: backend
---
# ------------------- Deployment ------------------- #
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: java-test-deployment
  namespace: default
spec:
  selector:
      matchLabels:
        app: java-test
        tier: backend
  replicas: 1
  template:
    metadata:
      labels:
        app: java-test
        tier: backend
    spec:
      nodeSelector:
        dubbo_provder: dubbo_provider
      containers:
        - name: java-test
          image: [your image]
          imagePullPolicy: Always
#          resources:
#            requests:
#              cpu: 100m
#              memory: 100Mi
#            limits:
#              cpu: 100m
#              memory: 100Mi
          env:
              - name:  APOLLO_META
                value: http://172.31.205.22:8080
              - name: DUBBO_IP_TO_REGISTRY
                value: 172.31.205.23
              - name: DUBBO_PORT_TO_REGISTRY
                value: "30011"
              - name: DUBBO_PORT_TO_BIND
                value: "30011"
          ports:
            - containerPort: 30011
      imagePullSecrets:
      - name: harbor-key
---
# ------------------- ingress ---------------------- #
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: java-test-ingress
  namespace: default
spec:
  rules:
  - host: javatest.com
    http:
      #port: 80
      paths:
      - path: /
        backend:
          serviceName: java-test-svc
          servicePort: 30011