refactor: 调整主机监控任务时间为整分钟执行 (#6379)

backend/app/service/monitor.go

@@ -201,16 +201,19 @@ func StartMonitor(removeBefore bool, interval string) error {
 	service := NewIMonitorService()
 	ctx, cancel := context.WithCancel(context.Background())
 	monitorCancel = cancel
-	monitorID, err := global.Cron.AddJob(fmt.Sprintf("@every %sm", interval), service)
-	if err != nil {
-		return err
-	}
-
+	now := time.Now()
+	nextMinute := now.Truncate(time.Minute).Add(time.Minute)
+	time.AfterFunc(time.Until(nextMinute), func() {
+		monitorID, err := global.Cron.AddJob(fmt.Sprintf("@every %sm", interval), service)
+		if err != nil {
+			return
+		}
+		global.MonitorCronID = monitorID
+	})
 	service.Run()
 
 	go service.saveIODataToDB(ctx, float64(intervalItem))
 	go service.saveNetDataToDB(ctx, float64(intervalItem))
 
-	global.MonitorCronID = monitorID
 	return nil
 }