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到 Kubernetes 集群中的 Pod 的方法。这也用于设置应用程序集群，其中包括服务、pod、副本控制器和副本集的部署，集群的设置方式可以使部署在 pod 上的应用程序可以相互通信。

在这个设置中，可以在一个应用程序之上设置一个负载均衡器，将流量转移到一组 Pod，然后它们与后端 Pod 通信，Pod 之间的通信是通过 Kubernetes 内置的服务对象进行的。

Ngnix 负载均衡器 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

Ngnix 副本控制器 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

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

前端副本控制器 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

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

后端副本控制器 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