kubernetes集群部署redis5.0.6单机版

1、首先，通过Config Map来对容器中redis应用的配置进行管理，如自定义配置文件、密码、日志路径等

redis-standalone-conf.yml

apiVersion: v1
kind: ConfigMap
metadata:
  name: redis-standalone-conf
data:
  redis.conf: |
        bind 0.0.0.0
        port 6379
        requirepass 111111
        appendonly yes
        cluster-config-file nodes-6379.conf
        pidfile /redis/log/redis-6379.pid
        cluster-config-file /redis/conf/redis.conf
        dir /redis/data/
        logfile /redis/log/redis-6379.log
        cluster-node-timeout 5000
        protected-mode no

创建configmaps

kubectl apply -f redis-standalone-conf.yml

2、上面部署的redis，数据是存储在当前部署节点的本地的文件系统，现在讲存储改成NFS，创建pv和pvc

　　首先创建NFS

注：预先在NFS服务器上创建目录：/home/data/nfs/pai/redisstandalone

# 创建挂载目录
mkdir /home/data/nfs/pai/redisstandalone -p

cat >>/etc/exports <<EOF
/home/data/nfs/pai/redisstandalone *(rw,sync,no_root_squash)
EOF

exportfs -r
systemctl restart rpcbind && systemctl restart nfs-server

redis-standalone-pv.yml

---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: redis-standalone-pv
spec:
  capacity:
    storage: 200G
  accessModes:
    - ReadWriteMany
  storageClassName: nfsredis
  nfs:
    server: 192.168.33.157 # NFS服务器地址
    path: "/home/data/nfs/pai/redisstandalone"  # NFS目录

---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: redis-standalone-pvc
spec:
  volumeName: redis-standalone-pv
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 100Gi
  storageClassName: nfsredis

创建pv和pvc

kubectl apply -f redis-standalone-pv.yml

3、由于redis是一个有状态服务，因此，现需要创建一个StatefulSet，并把数据挂载到宿主机上。

redis-standalone-statefulset.yml

apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: redis-standalone
spec:
  replicas: 1
  serviceName: redis-standalone
  selector:
    matchLabels:
      name: redis-standalone
  template:
    metadata:
      labels:
        name: redis-standalone
    spec:
      #nodeName: gggd12-111-128-105 # 指定调度节点
      initContainers:
      - name: init-redis-standalone
        image: busybox
        command: ['sh', '-c', 'mkdir -p /redis/log/;mkdir -p /redis/conf/;mkdir -p /redis/data/']
        volumeMounts:
        - name: redis-standalone-pvc
          mountPath: /redis/
      containers:
      - name: redis-standalone
        image: redis:5.0.6
        imagePullPolicy: IfNotPresent
        command:
        - sh
        - -c
        - "exec redis-server /redis/conf/redis.conf"
        ports:
        - containerPort: 6379
          name: redis
          protocol: TCP
        volumeMounts:
        - name: redis-config
          mountPath: /redis/conf/
        - name: redis-standalone-pvc
          mountPath: /redis/
      volumes:
      - name: redis-config
        configMap:
          name: redis-standalone-conf
      - name: redis-standalone-pvc
        persistentVolumeClaim:
          claimName: redis-standalone-pvc

4、通过创建service，提供对外访问pod的服务接口

redis-standalone-service.yml

kind: Service
apiVersion: v1
metadata:
  labels:
    name: redis-standalone
  name: redis-standalone
spec:
  type: NodePort
  ports:
  - name: redis
    port: 6379
    targetPort: 6379
    nodePort: 31379
  selector:
    name: redis-standalone

创建service

kubectl apply -f redis-standalone-service.yml

5、验证redis是否部署成功

查看pod、pv、pvc、service、ConfigMap运行状态

kubectl get pod,svc,pv,pvc,cm

测试远程连接

　　注：这里的host为宿主机IP

　　-h 指定 远程redis主机的IP地址（pod所在的k8s节点）

　　-p 指定 远程redis连接的端口 （service暴露的端口）

　　-a 指定 远程redis连接的密码 （ConfigMap文件中设置的密码）

redis-cli -h 192.168.33.244 -p 31379 -a 111111

最后，更新完了重新验证redis即可。

登录NFS服务器，查看相应的文件挂载信息

[root@k8s-master redis]# tree /home/data/nfs/pai/redisstandalone/
/home/data/nfs/pai/redisstandalone/
├── conf
├── data
│   └── appendonly.aof
└── log
    ├── redis-6379.log
    └── redis-6379.pid

3 directories, 3 files