feat: support event triggered synchronization (#2478) (#210)

Co-authored-by: AlinsRan <alinsran@apache.org>

Author: ronething

internal/provider/adc/adc.go

@@ -94,6 +94,8 @@ type adcClient struct {
 
 	updater         status.Updater
 	statusUpdateMap map[types.NamespacedNameKind][]string
+
+	syncCh chan struct{}
 }
 
 type Task struct {
@@ -116,6 +118,7 @@ func New(updater status.Updater, opts ...Option) (provider.Provider, error) {
 		store:      NewStore(),
 		executor:   &DefaultADCExecutor{},
 		updater:    updater,
+		syncCh:     make(chan struct{}, 1),
 	}, nil
 }
 
@@ -220,6 +223,7 @@ func (d *adcClient) Update(ctx context.Context, tctx *provider.TranslateContext,
 	// which only needs to be saved in cache
 	// and triggered by a timer for synchronization
 	if d.BackendMode == BackendModeAPISIXStandalone || d.BackendMode == BackendModeAPISIX {
+		d.syncNotify()
 		return nil
 	}
 
@@ -289,6 +293,8 @@ func (d *adcClient) Delete(ctx context.Context, obj client.Object) error {
 				Name:    obj.GetName(),
 				configs: configs,
 			})
+		} else {
+			d.syncNotify()
 		}
 		return nil
 	case BackendModeAPI7EE:
@@ -306,26 +312,34 @@ func (d *adcClient) Delete(ctx context.Context, obj client.Object) error {
 
 func (d *adcClient) Start(ctx context.Context) error {
 	initalSyncDelay := d.InitSyncDelay
-	time.AfterFunc(initalSyncDelay, func() {
-		if err := d.Sync(ctx); err != nil {
-			log.Error(err)
-			return
-		}
-	})
+	if initalSyncDelay > 0 {
+		time.AfterFunc(initalSyncDelay, func() {
+			if err := d.Sync(ctx); err != nil {
+				log.Error(err)
+				return
+			}
+		})
+	}
 
 	if d.SyncPeriod < 1 {
 		return nil
 	}
 	ticker := time.NewTicker(d.SyncPeriod)
 	defer ticker.Stop()
 	for {
+		synced := false
 		select {
+		case <-d.syncCh:
+			synced = true
 		case <-ticker.C:
+			synced = true
+		case <-ctx.Done():
+			return nil
+		}
+		if synced {
 			if err := d.Sync(ctx); err != nil {
 				log.Error(err)
 			}
-		case <-ctx.Done():
-			return nil
 		}
 	}
 }
@@ -506,6 +520,13 @@ func (d *adcClient) sync(ctx context.Context, task Task) error {
 	return nil
 }
 
+func (d *adcClient) syncNotify() {
+	select {
+	case d.syncCh <- struct{}{}:
+	default:
+	}
+}
+
 func prepareSyncFile(resources any) (string, func(), error) {
 	data, err := json.Marshal(resources)
 	if err != nil {

internal/provider/adc/config.go

@@ -207,6 +207,8 @@ func (d *adcClient) updateConfigForGatewayProxy(tctx *provider.TranslateContext,
 	for _, ref := range referrers {
 		d.configs[ref] = *config
 	}
+
+	d.syncNotify()
 	return nil
 }
 

test/conformance/apisix/suite_test.go

@@ -165,9 +165,9 @@ func TestMain(m *testing.M) {
 		ControllerName:     s.GetControllerName(),
 		Namespace:          namespace,
 		StatusAddress:      address,
-		InitSyncDelay:      1 * time.Minute,
+		InitSyncDelay:      20 * time.Minute,
 		ProviderType:       framework.ProviderType,
-		ProviderSyncPeriod: 10 * time.Millisecond,
+		ProviderSyncPeriod: 1 * time.Hour,
 	})
 
 	adminEndpoint := fmt.Sprintf("http://%s.%s:9180", svc.Name, namespace)

test/e2e/scaffold/apisix_deployer.go

@@ -260,7 +260,7 @@ func (s *APISIXDeployer) DeployIngress() {
 	s.Framework.DeployIngress(framework.IngressDeployOpts{
 		ControllerName:     s.opts.ControllerName,
 		ProviderType:       framework.ProviderType,
-		ProviderSyncPeriod: 200 * time.Millisecond,
+		ProviderSyncPeriod: 1 * time.Hour,
 		Namespace:          s.namespace,
 		Replicas:           1,
 	})
@@ -270,7 +270,7 @@ func (s *APISIXDeployer) ScaleIngress(replicas int) {
 	s.Framework.DeployIngress(framework.IngressDeployOpts{
 		ControllerName:     s.opts.ControllerName,
 		ProviderType:       framework.ProviderType,
-		ProviderSyncPeriod: 200 * time.Millisecond,
+		ProviderSyncPeriod: 1 * time.Hour,
 		Namespace:          s.namespace,
 		Replicas:           replicas,
 	})