add GetSecDsn to get config description

sentinel/sentinel.go

@@ -29,6 +29,15 @@ type Config struct {
 	IdleTimeout      *int   `toml:"idle_timeout"`      //空闲超时时间
 }
 
+func GetSecDsn(cfg Config) (dsn string) {
+	if cfg.Master != "" {
+		dsn += fmt.Sprintf("mode=redis address=%s", cfg.Master)
+	} else if cfg.MasterName != "" {
+		dsn += fmt.Sprintf("mode=sentinel address=%s mastername=%s", cfg.Sentinels, cfg.MasterName)
+	}
+	return dsn
+}
+
 type Sentinel struct {
 	// Addrs is a slice with known Sentinel addresses.
 	Addrs []string