fix: add informer resync period for node status watcher

Also use a constant everywhere in informers.

Add some debug logs.

Might fix #9991

Signed-off-by: Andrey Smirnov <andrey.smirnov@siderolabs.com>

internal/app/machined/pkg/controllers/k8s/endpoint.go

@@ -269,7 +269,7 @@ func (ctrl *EndpointController) watchKubernetesEndpoint(ctx context.Context, r c
 
 func kubernetesEndpointWatcher(ctx context.Context, logger *zap.Logger, client *kubernetes.Client) (chan *corev1.Endpoints, func(), error) {
 	informerFactory := informers.NewSharedInformerFactoryWithOptions(
-		client.Clientset, 30*time.Second,
+		client.Clientset, constants.KubernetesInformerDefaultResyncPeriod,
 		informers.WithNamespace(corev1.NamespaceDefault),
 		informers.WithTweakListOptions(func(options *v1.ListOptions) {
 			options.FieldSelector = fields.OneTermEqualSelector("metadata.name", "kubernetes").String()

internal/app/machined/pkg/controllers/k8s/internal/nodewatch/nodewatch.go

@@ -9,6 +9,7 @@ import (
 	"context"
 	"fmt"
 
+	"go.uber.org/zap"
 	corev1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/fields"
@@ -17,6 +18,7 @@ import (
 	"k8s.io/client-go/tools/cache"
 
 	"github.com/siderolabs/talos/pkg/kubernetes"
+	"github.com/siderolabs/talos/pkg/machinery/constants"
 )
 
 // NodeWatcher defines a NodeWatcher-based node watcher.
@@ -46,10 +48,12 @@ func (r *NodeWatcher) Get() (*corev1.Node, error) {
 }
 
 // Watch starts watching Node state and notifies on updates via notify channel.
-func (r *NodeWatcher) Watch(ctx context.Context) (<-chan struct{}, <-chan error, func(), error) {
+func (r *NodeWatcher) Watch(ctx context.Context, logger *zap.Logger) (<-chan struct{}, <-chan error, func(), error) {
+	logger.Debug("starting node watcher", zap.String("nodename", r.nodename))
+
 	informerFactory := informers.NewSharedInformerFactoryWithOptions(
 		r.client.Clientset,
-		0,
+		constants.KubernetesInformerDefaultResyncPeriod,
 		informers.WithTweakListOptions(
 			func(opts *metav1.ListOptions) {
 				opts.FieldSelector = fields.OneTermEqualSelector(metav1.ObjectNameField, r.nodename).String()
@@ -88,7 +92,11 @@ func (r *NodeWatcher) Watch(ctx context.Context) (<-chan struct{}, <-chan error,
 
 	informerFactory.Start(ctx.Done())
 
+	logger.Debug("waiting for node cache sync")
+
 	informerFactory.WaitForCacheSync(ctx.Done())
 
+	logger.Debug("node cache sync done")
+
 	return notifyCh, watchErrCh, informerFactory.Shutdown, nil
 }

internal/app/machined/pkg/controllers/k8s/node_status.go

@@ -158,9 +158,9 @@ func (ctrl *NodeStatusController) Run(ctx context.Context, r controller.Runtime,
 			var watchCtx context.Context
 			watchCtx, watchCtxCancel = context.WithCancel(ctx) //nolint:govet
 
-			notifyCh, watchErrCh, notifyCloser, err = nodewatcher.Watch(watchCtx)
+			notifyCh, watchErrCh, notifyCloser, err = nodewatcher.Watch(watchCtx, logger)
 			if err != nil {
-				return fmt.Errorf("error setting up registry watcher: %w", err) //nolint:govet
+				return fmt.Errorf("error setting up node watcher: %w", err) //nolint:govet
 			}
 		}
 

internal/integration/base/k8s.go

@@ -51,6 +51,7 @@ import (
 	"k8s.io/kubectl/pkg/scheme"
 
 	taloskubernetes "github.com/siderolabs/talos/pkg/kubernetes"
+	"github.com/siderolabs/talos/pkg/machinery/constants"
 )
 
 // K8sSuite is a base suite for K8s tests.
@@ -813,9 +814,12 @@ func (k8sSuite *K8sSuite) SetupNodeInformer(ctx context.Context, nodeName string
 
 	watchCh := make(chan *corev1.Node)
 
-	informerFactory := informers.NewSharedInformerFactoryWithOptions(k8sSuite.Clientset, 30*time.Second, informers.WithTweakListOptions(func(options *metav1.ListOptions) {
-		options.FieldSelector = metadataKeyName + nodeName
-	}))
+	informerFactory := informers.NewSharedInformerFactoryWithOptions(
+		k8sSuite.Clientset, constants.KubernetesInformerDefaultResyncPeriod,
+		informers.WithTweakListOptions(func(options *metav1.ListOptions) {
+			options.FieldSelector = metadataKeyName + nodeName
+		}),
+	)
 
 	nodeInformer := informerFactory.Core().V1().Nodes().Informer()
 	_, err := nodeInformer.AddEventHandler(cache.ResourceEventHandlerFuncs{

internal/pkg/discovery/registry/kubernetes.go

@@ -12,7 +12,6 @@ import (
 	"net/netip"
 	"strconv"
 	"strings"
-	"time"
 
 	"github.com/siderolabs/gen/value"
 	"github.com/siderolabs/gen/xslices"
@@ -265,7 +264,7 @@ func (r *Kubernetes) List(localNodeName string) ([]*cluster.AffiliateSpec, error
 
 // Watch starts watching Node state and notifies on updates via notify channel.
 func (r *Kubernetes) Watch(ctx context.Context, logger *zap.Logger) (<-chan struct{}, func(), error) {
-	informerFactory := informers.NewSharedInformerFactory(r.client.Clientset, 30*time.Second)
+	informerFactory := informers.NewSharedInformerFactory(r.client.Clientset, constants.KubernetesInformerDefaultResyncPeriod)
 
 	notifyCh := make(chan struct{}, 1)
 

pkg/machinery/constants/constants.go

@@ -1238,6 +1238,9 @@ const (
 
 	// RegistrydListenAddress is the address to listen on for the registryd service.
 	RegistrydListenAddress = "127.0.0.1:3172"
+
+	// KubernetesInformerDefaultResyncPeriod is the default resync period for Kubernetes informers.
+	KubernetesInformerDefaultResyncPeriod = 30 * time.Second
 )
 
 // See https://linux.die.net/man/3/klogctl