feature(Redis): add db to config (#616)

Co-authored-by: xialeistudio <xialei@100tal.com>

pkg/cache/redis/pool.go

@@ -58,6 +58,7 @@ func NewPool(c *Config, options ...DialOption) (p *Pool) {
 		DialReadTimeout(time.Duration(c.ReadTimeout)),
 		DialWriteTimeout(time.Duration(c.WriteTimeout)),
 		DialPassword(c.Auth),
+		DialDatabase(c.Db),
 	}
 	ops = append(ops, options...)
 	p1 := pool.NewSlice(c.Config)

pkg/cache/redis/redis.go

@@ -34,6 +34,7 @@ type Config struct {
 	Proto        string
 	Addr         string
 	Auth         string
+	Db           int
 	DialTimeout  xtime.Duration
 	ReadTimeout  xtime.Duration
 	WriteTimeout xtime.Duration