k8s版本不同导致的clusterip不可用的解决方法

2018-12-04

develop 和 online k8s做分层业务时的区别总结

online和develop环境在使用Service时出现，dev可用， online不可用的情况,过程如下
- namespace(wqctest) -> service(inner-servicelog) -> deployment（replicas 2）

现在创建过程分别如下
- dev创建过程 namespace(wqctest) -> service(inner-servicelog) -> deployment1 ; deployment1内的pod可访问inner-servicelog
- online创建过程 namespace(wqctest) -> service(inner-servicelog) -> deployment1 ; 再别创建一个独立于service的deployment2。 deployment2内的pod可访问inner-servicelog

k8s deploy apiVersion 版本选择


k8s：1.6版本之前 apiVsersion：exteensions/v1beta1
          1.6版本到1.9版本之间：apps/v1beta1
          1.9版本之后:apps/v1

yaml文件如下

online 环境 k8s 1.9

---
apiVersion: v1
kind: Namespace
metadata:
  name: wqctest
---
# ClusterIP
apiVersion: v1
kind: Service
metadata:
  namespace: wqctest
  name: inner-servicelog
spec:
  selector:
    app:  myservice
  type: ClusterIP
  ports:
  - name: app
    protocol: TCP
    port: 80
    targetPort: 80
---
kind: Deployment
apiVersion: apps/v1beta2
metadata:
  labels:
    app: myservice
  name: myservice
  namespace: wqctest
spec:
  replicas: 1
  selector:
    matchLabels:
      app: myservice
  template:
    metadata:
      labels:
        app: myservice
    spec:
      containers:
      - name: myservice
        image: nginx:1.9 
        imagePullPolicy: Always
        resources:
          requests:
            memory: "2Gi"
            cpu: "250m"
          limits:
            memory: "2Gi"
            cpu: "500m"
        ports:
        - containerPort: 80
          protocol: TCP
---
kind: Deployment
apiVersion: apps/v1beta2
metadata:
  labels:
    app: myservice2
  name: myservice2
  namespace: wqctest
spec:
  replicas: 1
  selector:
    matchLabels:
      app: myservice2
  template:
    metadata:
      labels:
        app: myservice2
    spec:
      containers:
      - name: myservice2
        image: nginx:1.9 
        imagePullPolicy: Always
        resources:
          requests:
            memory: "2Gi"
            cpu: "250m"
          limits:
            memory: "2Gi"
            cpu: "500m"
        ports:
        - containerPort: 80
          protocol: TCP

develop 环境 k8s 1.11

---
apiVersion: v1
kind: Namespace
metadata:
  name: wqctest
---
# ClusterIP
apiVersion: v1
kind: Service
metadata:
  namespace: wqctest
  name: inner-servicelog
spec:
  selector:
    app:  myservice
  type: ClusterIP
  ports:
  - name: app
    protocol: TCP
    port: 80
    targetPort: 80
---
kind: Deployment
apiVersion: apps/v1beta2
metadata:
  labels:
    app: myservice
  name: myservice
  namespace: wqctest
spec:
  replicas: 1
  selector:
    matchLabels:
      app: myservice
  template:
    metadata:
      labels:
        app: myservice
    spec:
      containers:
      - name: myservice
        image: nginx:1.9 
        imagePullPolicy: Always
        resources:
          requests:
            memory: "2Gi"
            cpu: "250m"
          limits:
            memory: "2Gi"
            cpu: "500m"
        ports:
        - containerPort: 80
          protocol: TCP
---
kind: Deployment
apiVersion: apps/v1beta2
metadata:
  labels:
    app: myservice2
  name: myservice2
  namespace: wqctest
spec:
  replicas: 1
  selector:
    matchLabels:
      app: myservice2
  template:
    metadata:
      labels:
        app: myservice2
    spec:
      containers:
      - name: myservice2
        image: nginx:1.9 
        imagePullPolicy: Always
        resources:
          requests:
            memory: "2Gi"
            cpu: "250m"
          limits:
            memory: "2Gi"
            cpu: "500m"
        ports:
        - containerPort: 80
          protocol: TCP