From a8d9d1b3801439d3265242b9f45a6a076aaff715 Mon Sep 17 00:00:00 2001
From: dongjiang1989 <dongjiang1989@126.com>
Date: Mon, 23 Oct 2023 12:10:06 +0800
Subject: [PATCH] add informer transfromer

Signed-off-by: dongjiang1989 <dongjiang1989@126.com>
---
 cmd/adapter/adapter.go      |  7 ++++++-
 cmd/adapter/transformers.go | 39 +++++++++++++++++++++++++++++++++++++
 2 files changed, 45 insertions(+), 1 deletion(-)
 create mode 100644 cmd/adapter/transformers.go

diff --git a/cmd/adapter/adapter.go b/cmd/adapter/adapter.go
index ed14e4f6..db219b3b 100644
--- a/cmd/adapter/adapter.go
+++ b/cmd/adapter/adapter.go
@@ -277,7 +277,12 @@ func (cmd *PrometheusAdapter) addResourceMetricsAPI(promClient prom.Client, stop
 		return err
 	}
 
-	go podInformer.Informer().Run(stopCh)
+	ifm := podInformer.Informer()
+
+	if err := ifm.SetTransform(partialMetadataRemoveAll); err != nil {
+		return err
+	}
+	go ifm.Run(stopCh)
 
 	return nil
 }
diff --git a/cmd/adapter/transformers.go b/cmd/adapter/transformers.go
new file mode 100644
index 00000000..79d45ec9
--- /dev/null
+++ b/cmd/adapter/transformers.go
@@ -0,0 +1,39 @@
+/*
+Copyright 2023 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package main
+
+import (
+	"fmt"
+
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/client-go/tools/cache"
+)
+
+var _ cache.TransformFunc = partialMetadataRemoveAll
+
+// partialMetadataRemoveAll implements a cache.TransformFunc that removes
+// annotations and managed
+// fields from PartialObjectMetadata.
+func partialMetadataRemoveAll(obj interface{}) (interface{}, error) {
+	partialMeta, ok := obj.(*metav1.PartialObjectMetadata)
+	if !ok {
+		return nil, fmt.Errorf("internal error: cannot cast object %#+v to PartialObjectMetadata", obj)
+	}
+	partialMeta.Annotations = nil
+	partialMeta.ManagedFields = nil
+	return partialMeta, nil
+}