feat: support Redis Sentinel and Redis Cluster (#1952)

* feature: support Redis Sentinel and Redis Cluster

* chore: update implementation

---------

Co-authored-by: JustSong <quanpengsong@gmail.com>

common/redis.go

@@ -2,13 +2,15 @@ package common
 
 import (
 	"context"
+	"os"
+	"strings"
+	"time"
+
 	"github.com/go-redis/redis/v8"
 	"github.com/songquanpeng/one-api/common/logger"
-	"os"
-	"time"
 )
 
-var RDB *redis.Client
+var RDB redis.Cmdable
 var RedisEnabled = true
 
 // InitRedisClient This function is called after init()
@@ -23,13 +25,23 @@ func InitRedisClient() (err error) {
 		logger.SysLog("SYNC_FREQUENCY not set, Redis is disabled")
 		return nil
 	}
-	logger.SysLog("Redis is enabled")
-	opt, err := redis.ParseURL(os.Getenv("REDIS_CONN_STRING"))
-	if err != nil {
-		logger.FatalLog("failed to parse Redis connection string: " + err.Error())
+	redisConnString := os.Getenv("REDIS_CONN_STRING")
+	if os.Getenv("REDIS_MASTER_NAME") == "" {
+		logger.SysLog("Redis is enabled")
+		opt, err := redis.ParseURL(redisConnString)
+		if err != nil {
+			logger.FatalLog("failed to parse Redis connection string: " + err.Error())
+		}
+		RDB = redis.NewClient(opt)
+	} else {
+		// cluster mode
+		logger.SysLog("Redis cluster mode enabled")
+		RDB = redis.NewUniversalClient(&redis.UniversalOptions{
+			Addrs:      strings.Split(redisConnString, ","),
+			Password:   os.Getenv("REDIS_PASSWORD"),
+			MasterName: os.Getenv("REDIS_MASTER_NAME"),
+		})
 	}
-	RDB = redis.NewClient(opt)
-
 	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
 	defer cancel()