1、环境准备

请安装完成K8S环境，此示例中我们有一个master：10.41.10.61，3个node：10.41.10.71-73，1个registry镜像仓库：10.41.10.81，1个ceph分布式存储集群：10.41.10.81-83

请在K8S所有节点上配置/etc/docker/daemon.json，添加：“insecure-registries”: [“10.41.10.81:5000”]

2、在镜像仓库服务上下载Percona_xtradb_cluster镜像

docker pull redis
docker tag docker.io/redis 10.41.10.81:5000/redis
docker push 10.41.10.81:5000/redis #提交到镜像仓库

3、在master上部署2个服务

cat <<eof >redis-master-service.yaml
apiVersion: v1
kind: Service
metadata:
  name: redis-master-svc
spec:
  selector:
    node: redis-master
  ports:
  - name: redis
    port: 6379
  type: NodePort
  externalIPs:
  - 10.41.10.60
eof
cat <<eof >redis-slave-service.yaml
apiVersion: v1
kind: Service
metadata:
  name: redis-slave-svc
spec:
  selector:
    node: redis-slave
  ports:
  - name: redis
    port: 6379
eof
kubectl apply -f redis-master-service.yaml #生效服务  
kubectl apply -f redis-slave-service.yaml
kubectl get svc #查看服务，这一步需要得到redis-master-svc的内部集群地址，后面添加slave节点时需要它作为master的IP地址

4、添加两个节点的持久化存储

cat <<eof >redis-master-pv-pvc.yaml
apiVersion: v1
kind: PersistentVolume
metadata:
  name: redis-master-pv
spec:
  capacity:
    storage: 20Gi
  accessModes:
    - ReadWriteMany
  cephfs:
    monitors:
      - 10.41.10.81:6789,10.41.10.82:6789,10.41.10.83:6789
    path: /redis/master
    user: admin
    readOnly: false
    secretRef:
      name: ceph-secret
  persistentVolumeReclaimPolicy: Recycle
---
apiVersion: v1
metadata:
  name: redis-master-pvc
spec:
  accessModes:
    - ReadWriteMany
  volumeName: redis-master-pv
  resources:
    requests:
      storage: 20Gi
eof
cat <<eof >redis-slave-pv-pvc.yaml
apiVersion: v1
kind: PersistentVolume
metadata:
  name: redis-slave-pv
spec:
  capacity:
    storage: 20Gi
  accessModes:
    - ReadWriteMany
  cephfs:
    monitors:
      - 10.41.10.81:6789,10.41.10.82:6789,10.41.10.83:6789
    path: /redis/slave
    user: admin
    readOnly: false
    secretRef:
      name: ceph-secret
  persistentVolumeReclaimPolicy: Recycle
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: redis-slave-pvc
spec:
  accessModes:
    - ReadWriteMany
  volumeName: redis-slave-pv
  resources:
    requests:
      storage: 20Gi
eof
kubectl apply -f redis-master-pv-pvc.yaml #生效存储
kubectl apply -f redis-slave-pv-pvc.yaml
kubectl get pv #查看存储

5、在存储中添加redis配置文件

我的下载里找名称：“k8s部署redis所需要的配置文件”

上传以上两个文件分别到存储目录下的master与slave文件下，并分别修改文件名为redis.conf

这个dump.rdb只有已经进行数据快照才会产生，这里不用管它。

修改slave文件夹下面的redis.conf，主要关注以下几项

requirepass #这里配置redis的密码
masterauth #这里配置slave的复制密码
slaveof 10.111.80.141 6379 #这里的主节点就是要用上面我们查看到的k8s的redis-master-svc集群地址

修改master文件夹下面的redis.conf，注意slaveof这一项需要注释掉，其它同上。

6、K8S中添加部署

cat <<eof >redis-master-deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: redis-master
spec:
  replicas: 1
  selector:
    matchLabels:
      app: redis-master
  template:
    metadata:
      labels:
        app: redis-master
        node: redis-master
        unit: redis-cluster
    spec:
      containers:
      - name: redis-master
        image: 10.41.10.81:5000/redis
        volumeMounts:
        - mountPath: "/data"
          name: data
        ports:
        - containerPort: 6379
        command: ["redis-server"]
        args: ["/data/redis.conf"]
      volumes:
      - name: data
        persistentVolumeClaim:
          claimName: redis-master-pvc
eof
cat <<eof >redis-slave-deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: redis-slave
spec:
  replicas: 1
  selector:
    matchLabels:
      app: redis-slave
  template:
    metadata:
      labels:
        app: redis-slave
        node: redis-slave
        unit: redis-cluster
    spec:
      containers:
      - name: redis-slave
        image: 10.41.10.81:5000/redis
        command: ["redis-server"]
        args: ["/data/redis.conf"]
        volumeMounts:
        - mountPath: "/data"
          name: data
        ports:
        - containerPort: 6379
      volumes:
      - name: data
        persistentVolumeClaim:
          claimName: redis-slave-pvc
eof
kubectl apply -f redis-master-deployment.yaml #部署主节点
kubectl apply -f redis-slave-deployment.yaml #部署次节点
kubectl get pods -o wide #查看部署情况

7、验证

分别进入pod，查看集群状态

kubectl exec -it redis-master-75fdfdb8f8-bqwmx /bin/bash
redis-cli
auth redis@123 #输入密码
info replication #查看集群

进入slave节点

kubectl exec -it redis-slave-7b764f878b-tfrdp /bin/bash
redis-cli
auth redis@123 #输入密码
info replication #查看集群

大功告成！