rebase: bump sigs.k8s.io/controller-runtime

Bumps the k8s-dependencies group with 1 update in the / directory: [sigs.k8s.io/controller-runtime](https://github.com/kubernetes-sigs/controller-runtime).

Updates `sigs.k8s.io/controller-runtime` from 0.17.3 to 0.18.2
- [Release notes](https://github.com/kubernetes-sigs/controller-runtime/releases)
- [Changelog](https://github.com/kubernetes-sigs/controller-runtime/blob/main/RELEASE.md)
- [Commits](https://github.com/kubernetes-sigs/controller-runtime/compare/v0.17.3...v0.18.2)

---
updated-dependencies:
- dependency-name: sigs.k8s.io/controller-runtime
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: k8s-dependencies
...

Signed-off-by: dependabot[bot] <support@github.com>

vendor/sigs.k8s.io/controller-runtime/pkg/cache/cache.go

@@ -39,11 +39,9 @@ import (
 	"sigs.k8s.io/controller-runtime/pkg/cache/internal"
 	"sigs.k8s.io/controller-runtime/pkg/client"
 	"sigs.k8s.io/controller-runtime/pkg/client/apiutil"
-	logf "sigs.k8s.io/controller-runtime/pkg/internal/log"
 )
 
 var (
-	log               = logf.RuntimeLog.WithName("object-cache")
 	defaultSyncPeriod = 10 * time.Hour
 )
 
@@ -203,6 +201,9 @@ type Options struct {
 
 	// DefaultTransform will be used as transform for all object types
 	// unless there is already one set in ByObject or DefaultNamespaces.
+	//
+	// A typical usecase for this is to use TransformStripManagedFields
+	// to reduce the caches memory usage.
 	DefaultTransform toolscache.TransformFunc
 
 	// DefaultWatchErrorHandler will be used to the WatchErrorHandler which is called
@@ -222,7 +223,7 @@ type Options struct {
 	DefaultUnsafeDisableDeepCopy *bool
 
 	// ByObject restricts the cache's ListWatch to the desired fields per GVK at the specified object.
-	// object, this will fall through to Default* settings.
+	// If unset, this will fall through to the Default* settings.
 	ByObject map[client.Object]ByObject
 
 	// newInformer allows overriding of NewSharedIndexInformer for testing.
@@ -346,6 +347,20 @@ func New(cfg *rest.Config, opts Options) (Cache, error) {
 	return delegating, nil
 }
 
+// TransformStripManagedFields strips the managed fields of an object before it is committed to the cache.
+// If you are not explicitly accessing managedFields from your code, setting this as `DefaultTransform`
+// on the cache can lead to a significant reduction in memory usage.
+func TransformStripManagedFields() toolscache.TransformFunc {
+	return func(in any) (any, error) {
+		// Nilcheck managed fields to avoid hitting https://github.com/kubernetes/kubernetes/issues/124337
+		if obj, err := meta.Accessor(in); err == nil && obj.GetManagedFields() != nil {
+			obj.SetManagedFields(nil)
+		}
+
+		return in, nil
+	}
+}
+
 func optionDefaultsToConfig(opts *Options) Config {
 	return Config{
 		LabelSelector:         opts.DefaultLabelSelector,
@@ -419,19 +434,6 @@ func defaultOpts(config *rest.Config, opts Options) (Options, error) {
 		}
 	}
 
-	for namespace, cfg := range opts.DefaultNamespaces {
-		cfg = defaultConfig(cfg, optionDefaultsToConfig(&opts))
-		if namespace == metav1.NamespaceAll {
-			cfg.FieldSelector = fields.AndSelectors(
-				appendIfNotNil(
-					namespaceAllSelector(maps.Keys(opts.DefaultNamespaces)),
-					cfg.FieldSelector,
-				)...,
-			)
-		}
-		opts.DefaultNamespaces[namespace] = cfg
-	}
-
 	for obj, byObject := range opts.ByObject {
 		isNamespaced, err := apiutil.IsObjectNamespaced(obj, opts.Scheme, opts.Mapper)
 		if err != nil {
@@ -485,6 +487,22 @@ func defaultOpts(config *rest.Config, opts Options) (Options, error) {
 		opts.ByObject[obj] = byObject
 	}
 
+	// Default namespaces after byObject has been defaulted, otherwise a namespace without selectors
+	// will get the `Default` selectors, then get copied to byObject and then not get defaulted from
+	// byObject, as it already has selectors.
+	for namespace, cfg := range opts.DefaultNamespaces {
+		cfg = defaultConfig(cfg, optionDefaultsToConfig(&opts))
+		if namespace == metav1.NamespaceAll {
+			cfg.FieldSelector = fields.AndSelectors(
+				appendIfNotNil(
+					namespaceAllSelector(maps.Keys(opts.DefaultNamespaces)),
+					cfg.FieldSelector,
+				)...,
+			)
+		}
+		opts.DefaultNamespaces[namespace] = cfg
+	}
+
 	// Default the resync period to 10 hours if unset
 	if opts.SyncPeriod == nil {
 		opts.SyncPeriod = &defaultSyncPeriod

vendor/sigs.k8s.io/controller-runtime/pkg/cache/internal/cache_reader.go

@@ -36,7 +36,7 @@ import (
 // CacheReader is a client.Reader.
 var _ client.Reader = &CacheReader{}
 
-// CacheReader wraps a cache.Index to implement the client.CacheReader interface for a single type.
+// CacheReader wraps a cache.Index to implement the client.Reader interface for a single type.
 type CacheReader struct {
 	// indexer is the underlying indexer wrapped by this cache.
 	indexer cache.Indexer

vendor/sigs.k8s.io/controller-runtime/pkg/cache/internal/informers.go

@@ -18,6 +18,7 @@ package internal
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"math/rand"
 	"net/http"
@@ -186,10 +187,14 @@ type Informers struct {
 // Start calls Run on each of the informers and sets started to true. Blocks on the context.
 // It doesn't return start because it can't return an error, and it's not a runnable directly.
 func (ip *Informers) Start(ctx context.Context) error {
-	func() {
+	if err := func() error {
 		ip.mu.Lock()
 		defer ip.mu.Unlock()
 
+		if ip.started {
+			return errors.New("Informer already started") //nolint:stylecheck
+		}
+
 		// Set the context so it can be passed to informers that are added later
 		ip.ctx = ctx
 
@@ -207,7 +212,11 @@ func (ip *Informers) Start(ctx context.Context) error {
 		// Set started to true so we immediately start any informers added later.
 		ip.started = true
 		close(ip.startWait)
-	}()
+
+		return nil
+	}(); err != nil {
+		return err
+	}
 	<-ctx.Done() // Block until the context is done
 	ip.mu.Lock()
 	ip.stopped = true // Set stopped to true so we don't start any new informers

vendor/sigs.k8s.io/controller-runtime/pkg/cache/multi_namespace_cache.go

@@ -163,12 +163,13 @@ func (c *multiNamespaceCache) GetInformerForKind(ctx context.Context, gvk schema
 }
 
 func (c *multiNamespaceCache) Start(ctx context.Context) error {
+	errs := make(chan error)
 	// start global cache
 	if c.clusterCache != nil {
 		go func() {
 			err := c.clusterCache.Start(ctx)
 			if err != nil {
-				log.Error(err, "cluster scoped cache failed to start")
+				errs <- fmt.Errorf("failed to start cluster-scoped cache: %w", err)
 			}
 		}()
 	}
@@ -177,13 +178,16 @@ func (c *multiNamespaceCache) Start(ctx context.Context) error {
 	for ns, cache := range c.namespaceToCache {
 		go func(ns string, cache Cache) {
 			if err := cache.Start(ctx); err != nil {
-				log.Error(err, "multi-namespace cache failed to start namespaced informer", "namespace", ns)
+				errs <- fmt.Errorf("failed to start cache for namespace %s: %w", ns, err)
 			}
 		}(ns, cache)
 	}
-
-	<-ctx.Done()
-	return nil
+	select {
+	case <-ctx.Done():
+		return nil
+	case err := <-errs:
+		return err
+	}
 }
 
 func (c *multiNamespaceCache) WaitForCacheSync(ctx context.Context) bool {