region misc fix:

- guest postpaid expire support set expire time
- list instance snapshot sub snapshot return size

pkg/util/billing/billingcycle.go

@@ -37,6 +37,7 @@ const (
 
 var (
 	ErrInvalidBillingCycle = errors.New("invalid billing cycle")
+	ErrInvalidDuration     = errors.New("invalid duration")
 )
 
 type SBillingCycle struct {
@@ -74,6 +75,14 @@ func ParseBillingCycle(cycleStr string) (SBillingCycle, error) {
 	return cycle, nil
 }
 
+// parse duration to minute unit billing cycle
+func DurationToBillingCycle(dur time.Duration) SBillingCycle {
+	return SBillingCycle{
+		Unit:  BillingCycleMinute,
+		Count: int(dur.Minutes()),
+	}
+}
+
 func (cycle *SBillingCycle) String() string {
 	return fmt.Sprintf("%d%s", cycle.Count, cycle.Unit)
 }