系统环境

• Kubernetes版本：1.20.0

• Redis版本：5.0.8

部署服务

[root@k8s01 tools-env]# vim redis.yaml 
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: redis-config
  namespace: tools-env
data:
  redis.conf: |-
    dir /data
    port 6379
    bind 0.0.0.0
    appendonly yes
    protected-mode no
    requirepass super
    pidfile /data/redis-6379.pid
    maxmemory 1073741824    # maxmemory参数用于配置Redis可用最大内存数,单位为字节,1073741824=1G大小,Deployment部署时候的limit要和该限制的大小保持一致
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: redis-pvc
  namespace: tools-env
  labels:
    app: redis
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 10Gi
  storageClassName: managed-nfs-storage
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: redis
  namespace: tools-env
  labels:
    app: redis
spec:
  replicas: 1
  selector:
    matchLabels:
      app: redis
  template:
    metadata:
      labels:
        app: redis
    spec:
      #进行初始化操作,修改系统配置,解决Redis启动时提示的警告信息
      initContainers:
        - name: system-init
          image: busybox:1.32
          imagePullPolicy: IfNotPresent
          command:
            - "sh"
            - "-c"
            - "echo 2048 > /proc/sys/net/core/somaxconn && echo never > /sys/kernel/mm/transparent_hugepage/enabled"
          securityContext:
            privileged: true
            runAsUser: 0
          volumeMounts:
          - name: sys
            mountPath: /sys
      containers:
        - name: redis
          image: redis:5.0.8
          imagePullPolicy: IfNotPresent
          command:
            - "sh"
            - "-c"
            - "redis-server /usr/local/etc/redis/redis.conf"
          ports:
            - containerPort: 6379
          resources:
            limits:
              cpu: 1000m
              memory: 1024Mi    # 注意这里的内存限制要和上面的ConfigMap中maxmemory参数限制的内存大小保持一致
            requests:
              cpu: 1000m
              memory: 1024Mi
          livenessProbe:
            tcpSocket:
              port: 6379
            initialDelaySeconds: 300
            timeoutSeconds: 1
            periodSeconds: 10
            successThreshold: 1
            failureThreshold: 3
          readinessProbe:
            tcpSocket:
              port: 6379
            initialDelaySeconds: 5
            timeoutSeconds: 1
            periodSeconds: 10
            successThreshold: 1
            failureThreshold: 3
          volumeMounts:
            - name: data
              mountPath: /data
            - name: config
              mountPath: /usr/local/etc/redis/redis.conf
              subPath: redis.conf
      volumes:
        - name: data
          persistentVolumeClaim:
            claimName: redis-pvc
        - name: config
          configMap:
            name: redis-config
        - name: sys
          hostPath:
            path: /sys
---
apiVersion: v1
kind: Service
metadata:
  labels:
    app: redis
  name: redis
  namespace: tools-env
spec:
  ports:
  - name: redis
    port: 6379
    protocol: TCP
    targetPort: 6379
  selector:
    app: redis
  type: ClusterIP

测试连接

[root@k8s01 tools]# kubectl exec -it -n tools-env redis-5bdbcbb8c4-jqwlg bash
kubectl exec [POD] [COMMAND] is DEPRECATED and will be removed in a future version. Use kubectl exec [POD] -- [COMMAND] instead.
Defaulted container "redis" out of: redis, system-init (init)
root@redis-5bdbcbb8c4-jqwlg:/data# redis-cli 

127.0.0.1:6379> auth super
OK
127.0.0.1:6379> ping
PONG