feat: support mark inactive schedulers in the scheduler gc (#4215)

Signed-off-by: chlins <chlins.zhang@gmail.com>

Author: chlins

manager/gc/audit.go

@@ -107,7 +107,7 @@ func (a *audit) RunGC(ctx context.Context) error {
 		}
 
 		gcResult.Purged += result.RowsAffected
-		logger.Infof("gc audit deleted %d audits", result.RowsAffected)
+		logger.Infof("audit GC deleted %d audits", result.RowsAffected)
 	}
 
 	return nil

manager/gc/scheduler.go

@@ -62,6 +62,77 @@ type scheduler struct {
 
 // RunGC implements the gc Runner interface.
 func (s *scheduler) RunGC(ctx context.Context) error {
+	if err := s.mark(ctx); err != nil {
+		// Only log error if failed in mark phase,
+		// because this can wait to be executed in the next gc window.
+		logger.Errorf("failed to mark inactive schedulers: %v", err)
+	}
+
+	return s.sweep(ctx)
+}
+
+// mark running the mark operation for marking inactive schedulers.
+func (s *scheduler) mark(_ context.Context) error {
+	logger.Info("running scheduler GC mark")
+
+	var schedulers []*models.Scheduler
+	for {
+		if err := s.db.Model(&models.Scheduler{}).
+			Where("state = ?", models.SchedulerStateActive).
+			// As there is no configuration for the old scheduler, so exclude these schedulers.
+			Where("config IS NOT NULL AND config != ''").
+			Limit(DefaultSchedulerGCBatchSize).
+			Find(&schedulers).Error; err != nil {
+			return err
+		}
+		if len(schedulers) == 0 {
+			break
+		}
+
+		now := time.Now()
+		schedulerIDs := make([]uint, 0, len(schedulers))
+		for _, scheduler := range schedulers {
+			if scheduler.Config == nil {
+				continue
+			}
+
+			// Retrieve the keep alive interval from the scheduler's configuration.
+			keepAliveInterval, ok := scheduler.Config["manager_keep_alive_interval"].(float64)
+			if !ok {
+				continue
+			}
+
+			// Check whether the last keep alive time is greater than 3x keep alive interval,
+			// indicating that the scheduler is inactive.
+			if now.Sub(scheduler.LastKeepAliveAt) > time.Duration(keepAliveInterval)*3 {
+				schedulerIDs = append(schedulerIDs, scheduler.ID)
+			}
+		}
+
+		if len(schedulerIDs) > 0 {
+			if err := s.db.Model(&models.Scheduler{}).
+				Where("id IN (?)", schedulerIDs).
+				Update("state", models.SchedulerStateInactive).
+				Error; err != nil {
+				return err
+			}
+		}
+
+		logger.Infof("scheduler GC marks %d schedulers to inactive", len(schedulerIDs))
+
+		// If this batch is not full, break the loop as it indicates that this is the last page.
+		if len(schedulers) < DefaultSchedulerGCBatchSize {
+			break
+		}
+	}
+
+	return nil
+}
+
+// sweep running the sweep operation for cleaning up inactive schedulers.
+func (s *scheduler) sweep(ctx context.Context) error {
+	logger.Info("running scheduler GC sweep")
+
 	args := models.JSONMap{
 		"type":       SchedulerGCTaskID,
 		"ttl":        DefaultSchedulerGCTTL,
@@ -93,7 +164,12 @@ func (s *scheduler) RunGC(ctx context.Context) error {
 	}()
 
 	for {
-		result := s.db.Where("updated_at < ?", time.Now().Add(-DefaultSchedulerGCTTL)).Where("state = ?", models.SchedulerStateInactive).Limit(DefaultSchedulerGCBatchSize).Unscoped().Delete(&models.Scheduler{})
+		result := s.db.Where("updated_at < ?", time.Now().
+			Add(-DefaultSchedulerGCTTL)).
+			Where("state = ?", models.SchedulerStateInactive).
+			Limit(DefaultSchedulerGCBatchSize).
+			Unscoped().
+			Delete(&models.Scheduler{})
 		if result.Error != nil {
 			gcResult.Error = result.Error
 			return result.Error
@@ -104,7 +180,7 @@ func (s *scheduler) RunGC(ctx context.Context) error {
 		}
 
 		gcResult.Purged += result.RowsAffected
-		logger.Infof("gc scheduler deleted %d inactive schedulers", result.RowsAffected)
+		logger.Infof("scheduler GC deleted %d inactive schedulers", result.RowsAffected)
 	}
 
 	return nil

manager/gc/seed_peer.go

@@ -104,7 +104,7 @@ func (s *seedPeer) RunGC(ctx context.Context) error {
 		}
 
 		gcResult.Purged += result.RowsAffected
-		logger.Infof("gc seed peer deleted %d inactive seed peers", result.RowsAffected)
+		logger.Infof("seed peer GC deleted %d inactive seed peers", result.RowsAffected)
 	}
 
 	return nil