handle duplicate tagkey

src/webapi/config/i18n.go

@@ -41,6 +41,7 @@ var (
 		"No permission. You are not admin of BG(%s)":       "没有权限操作，您并非业务组(%s)的管理员",
 		"The business group must retain at least one team": "业务组下要保留至少一个团队",
 		"At least one team have rw permission":             "业务组下至少要有一个具备读写权限的团队",
+		"duplicate tagkey(%s)":                             "标签KEY(%s)重复了",
 	}
 	langDict = map[string]map[string]string{
 		"zh": dict,

src/webapi/router/router_target.go

@@ -90,6 +90,15 @@ func targetBindTags(c *gin.Context) {
 			continue
 		}
 
+		// 不能有同key的标签，否则附到时序数据上会产生覆盖，让人困惑
+		for j := 0; j < len(f.Tags); j++ {
+			tagkey := strings.Split(f.Tags[j], "=")[0]
+			tagkeyPrefix := tagkey + "="
+			if strings.HasPrefix(target.Tags, tagkeyPrefix) {
+				ginx.Bomb(200, "duplicate tagkey(%s)", tagkey)
+			}
+		}
+
 		ginx.Dangerous(target.AddTags(f.Tags))
 	}