|NO.Z.00256|——————————|CloudNative|——|KuberNetes&中间件容器化及helm.V03|——|中间件.v03|redis.v5.0.4|yaml文件部署|

一、k8s下同步docker镜像

### --- 在节点1上下载并镜像导入到目标节点

[root@k8s-master01 redis]# scp redis.tar rabbit.tar k8s-master02:/root/

### --- 将镜像导入到docker容器中

[root@k8s-master02 ~]# docker load -i redis.tar
[root@k8s-master02 ~]# docker load -i rabbit.tar

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二、通过yaml文件创建redis单节点pod

### --- 创建redis-deployment.yaml注释：

~~~     # replicas: 1   
~~~     副本数量设置为1：因为redis是有状态的应用；若是需要使用多个的话，
~~~     需要搭建一个集群或者主从可以通过这个实例去创建中间件的pod

### --- 创建redis-deployment.yaml配置文件

[root@k8s-master01 redis]# cat redis.yaml 
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: redis-single-node
  name: redis-single-node
  namespace: ratel-test1
spec:
  progressDeadlineSeconds: 600
  replicas: 1
  revisionHistoryLimit: 10
  selector:
    matchLabels:
      app: redis-single-node
  strategy:
    rollingUpdate:
      maxSurge: 1
      maxUnavailable: 0
    type: RollingUpdate
  template:
    metadata:
      creationTimestamp: null
      labels:
        app: redis-single-node
    spec:
      containers:
      - command:
        - sh
        - -c
        - redis-server 
        - /mnt/redis.conf
        env:
        - name: TZ
          value: Asia/Shanghai
        - name: LANG
          value: C.UTF-8
        image: redis:5.0.4-alpine
        imagePullPolicy: IfNotPresent
        lifecycle: {}
        livenessProbe:
          failureThreshold: 2
          initialDelaySeconds: 10
          periodSeconds: 10
          successThreshold: 1
          tcpSocket:
            port: 6379
          timeoutSeconds: 2
        name: redis-single-node
        ports:
        - containerPort: 6379
          name: web
          protocol: TCP
        readinessProbe:
          failureThreshold: 2
          initialDelaySeconds: 10
          periodSeconds: 10
          successThreshold: 1
          tcpSocket:
            port: 6379
          timeoutSeconds: 2
        resources:
          limits:
            cpu: 100m
            memory: 339Mi
          requests:
            cpu: 10m
            memory: 10Mi
        securityContext:
          privileged: false
          runAsNonRoot: false
        terminationMessagePath: /dev/termination-log
        terminationMessagePolicy: File
        volumeMounts:
        - mountPath: /usr/share/zoneinfo/Asia/Shanghai
          name: tz-config
        - mountPath: /etc/localtime
          name: tz-config
        - mountPath: /etc/timezone
          name: timezone
        - mountPath: /mnt
          name: redis-conf
          readOnly: true
      dnsPolicy: ClusterFirst
      restartPolicy: Always
      schedulerName: default-scheduler
      securityContext: {}
      terminationGracePeriodSeconds: 30
      tolerations:
      - effect: NoExecute
        key: node.kubernetes.io/unreachable
        operator: Exists
        tolerationSeconds: 30
      - effect: NoExecute
        key: node.kubernetes.io/not-ready
        operator: Exists
        tolerationSeconds: 30
      volumes:
      - hostPath:
          path: /usr/share/zoneinfo/Asia/Shanghai
          type: ""
        name: tz-config
      - hostPath:
          path: /etc/timezone
          type: ""
        name: timezone
      - configMap:
          defaultMode: 420
          name: redis-conf
        name: redis-conf

三、创建redis-deployment

### --- 创建redis单节点pod

[root@k8s-master01 redis]# kubectl create -f redis.yaml -n ratel-test1

### --- 注意：
~~~     在创建service名称的时候，不要和redis的pod的名称一致，可以使用项目的名称去命名
~~~     若是命名一致，可能会出现问题。
~~~     在部署项目的时候，可能是一个项目用一个redis，或多个项目用一个redis，

### --- redis是共用的：

~~~     项目a和项目b各自公用各自的一个redis；这样可以把这个redis单独放在一个namespace下；
~~~     用来放公共服务的namespace下，项目可以去连接各自的redis

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Walter Savage Landor:strove with none,for none was worth my strife.Nature I loved and, next to Nature, Art:I warm'd both hands before the fire of life.It sinks, and I am ready to depart

                                                                                                                                                   ——W.S.Landor

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