K8S redis 部署的项目实践

# configmap存储redis配置
apiversion: v1
kind: configmap
metadata:
  name: redis-config
data:
  redis.conf: |
    bind 0.0.0.0
    port 6379
    requirepass your_secure_password  # 替换为实际密码
    appendonly yes
    dir /data

---
# 密码secret
apiversion: v1
kind: secret
metadata:
  name: redis-secret
type: opaque
data:
  password: ew91cl9zzwn1cmvfcgfzc3dvcmq=  # base64编码密码

---
# statefulset定义
apiversion: apps/v1
kind: statefulset
metadata:
  name: redis
spec:
  servicename: redis-headless
  replicas: 1  # 单实例
  selector:
    matchlabels:
      app: redis
  template:
    metadata:
      labels:
        app: redis
    spec:
      containers:
      - name: redis
        image: redis:7.0.12
        command: ["redis-server", "/etc/redis/redis.conf"]
        ports:
        - containerport: 6379
        volumemounts:
        - name: config
          mountpath: /etc/redis
        - name: data
          mountpath: /data
        env:
        - name: redis_password  # 从secret注入密码
          valuefrom:
            secretkeyref:
              name: redis-secret
              key: password
      volumes:
      - name: config
        configmap:
          name: redis-config
  volumeclaimtemplates:  # 动态pvc
  - metadata:
      name: data
    spec:
      accessmodes: [ "readwriteonce" ]
      storageclassname: "nfs-redis"  # 需提前创建nfs storageclass
      resources:
        requests:
          storage: 5gi

---
# headless service（内部dns）
apiversion: v1
kind: service
metadata:
  name: redis-headless
spec:
  clusterip: none
  selector:
    app: redis
  ports:
  - port: 6379
    name: redis

---
# nodeport service（外部访问）
apiversion: v1
kind: service
metadata:
  name: redis-external
spec:
  type: nodeport
  selector:
    app: redis
  ports:
  - port: 6379
    targetport: 6379
    nodeport: 31000  # 自定义端口范围30000-32767

kubectl apply -f redis-statefulset.yaml

# 修改statefulset部分
spec:
  replicas: 6  # 6节点
  template:
    spec:
      containers:
      - env:
        - name: redis_cluster_enabled  # 启用集群模式
          value: "yes"
# 其他部分与单实例相同

# 进入任意redis pod执行集群初始化
kubectl exec -it redis-0 -- redis-cli -a your_password \
  --cluster create \
  $(kubectl get pods -l app=redis -o jsonpath='{range.items[*]}{.status.podip}:6379 ') \
  --cluster-replicas 1

# 检查资源状态
kubectl get statefulset,pvc,svc -l app=redis

# 测试单实例连接
kubectl exec -it redis-0 -- redis-cli -a your_password ping

# 查看集群状态（集群模式）
kubectl exec -it redis-0 -- redis-cli -a your_password cluster nodes