Kubernetes(K8S) 应用部署

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  Kubernetes 应用部署

  部署是一种将镜像转换为容器，然后将这些镜像分配给Kubernetes集群中的Pod的方法。这也有助于设置应用程序集群，包括服务，pod，复制控制器和副本集的部署。可以通过这样一种方式来设置集群：部署在Pod上的应用程序可以相互通信。

  在此设置中，我们可以在一个应用程序的顶部进行负载平衡器设置，以将流量转移到一组Pod，然后它们与后端Pod通信。Pod之间的通信通过Kubernetes中内置的服务对象进行。

  
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  Ngnix负载平衡器Yaml文件

  
  apiVersion: v1
  kind: Service
  metadata:
     name: oppv-dev-nginx
        labels:
           k8s-app: omni-ppv-api
  spec:
     type: NodePort
     ports:
     - port: 8080
        nodePort: 31999
        name: omninginx
     selector:
        k8s-app: appname
        component: nginx
        env: dev
  

  复制
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  Ngnix复制控制器Yaml

  
  apiVersion: v1
  kind: ReplicationController
  metadata:
     name: appname
  spec:
     replicas: replica_count
     template:
        metadata:
           name: appname
           labels:
              k8s-app: appname
              component: nginx
                 env: env_name
  spec:
     nodeSelector:
        resource-group: oppv
     containers:
        - name: appname
        image: IMAGE_TEMPLATE
        imagePullPolicy: Always
        ports:
           - containerPort: 8080
           resources:
              requests:
                 memory: "request_mem"
                 cpu: "request_cpu"
              limits:
                 memory: "limit_mem"
                 cpu: "limit_cpu"
              env:
              - name: BACKEND_HOST
                 value: oppv-env_name-node:3000
  

  复制
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  前端服务Yaml文件

  
  apiVersion: v1
  kind: Service
  metadata:
     name: appname
     labels:
        k8s-app: appname
  spec:
     type: NodePort
     ports:
     - name: http
        port: 3000
        protocol: TCP
        targetPort: 3000
     selector:
        k8s-app: appname
        component: nodejs
        env: dev
  

  复制
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  前端复制控制器Yaml文件

  
  apiVersion: v1
  kind: ReplicationController
  metadata:
     name: Frontend
  spec:
     replicas: 3
     template:
        metadata:
           name: frontend
           labels:
              k8s-app: Frontend
              component: nodejs
              env: Dev
  spec:
     nodeSelector:
        resource-group: oppv
     containers:
        - name: appname
           image: IMAGE_TEMPLATE
           imagePullPolicy: Always
           ports:
              - containerPort: 3000
              resources:
                 requests:
                    memory: "request_mem"
                    cpu: "limit_cpu"
                    limits:
                    memory: "limit_mem"
                    cpu: "limit_cpu"
              env:
                 - name: ENV
                 valueFrom:
                 configMapKeyRef:
                 name: appname
                 key: config-env
  

  复制
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  后端服务Yaml文件

  
  apiVersion: v1
  kind: Service
  metadata:
     name: backend
     labels:
        k8s-app: backend
  spec:
     type: NodePort
     ports:
     - name: http
        port: 9010
        protocol: TCP
        targetPort: 9000
     selector:
        k8s-app: appname
        component: play
        env: dev
  支持的复制控制器Yaml文件
  apiVersion: v1
  kind: ReplicationController
  metadata:
     name: backend
  spec:
     replicas: 3
     template:
        metadata:
           name: backend
        labels:
           k8s-app: beckend
           component: play
           env: dev
  spec:
     nodeSelector:
        resource-group: oppv
        containers:
           - name: appname
              image: IMAGE_TEMPLATE
              imagePullPolicy: Always
              ports:
              - containerPort: 9000
              command: [ "./docker-entrypoint.sh" ]
              resources:
                 requests:
                    memory: "request_mem"
                    cpu: "request_cpu"
                 limits:
                    memory: "limit_mem"
                    cpu: "limit_cpu"
              volumeMounts:
                 - name: config-volume
                 mountPath: /app/vipin/play/conf
           volumes:
              - name: config-volume
              configMap:
              name: appname
  

  复制