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add inclusterconfig filter for commenting kube-proxy configmap (#1158)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,59 @@ | ||
| /* | ||
| Copyright 2023 The OpenYurt 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 inclusterconfig | ||
|
|
||
| import ( | ||
| "io" | ||
| "net/http" | ||
|
|
||
| "k8s.io/apimachinery/pkg/util/sets" | ||
|
|
||
| "github.com/openyurtio/openyurt/pkg/yurthub/filter" | ||
| "github.com/openyurtio/openyurt/pkg/yurthub/kubernetes/serializer" | ||
| ) | ||
|
|
||
| // Register registers a filter | ||
| func Register(filters *filter.Filters, sm *serializer.SerializerManager) { | ||
| filters.Register(filter.InClusterConfigFilterName, func() (filter.Runner, error) { | ||
| return NewFilter(sm), nil | ||
| }) | ||
| } | ||
|
|
||
| func NewFilter(sm *serializer.SerializerManager) *inClusterConfigFilter { | ||
| return &inClusterConfigFilter{ | ||
| serializerManager: sm, | ||
| } | ||
| } | ||
|
|
||
| type inClusterConfigFilter struct { | ||
| serializerManager *serializer.SerializerManager | ||
| } | ||
|
|
||
| func (iccf *inClusterConfigFilter) Name() string { | ||
| return filter.InClusterConfigFilterName | ||
| } | ||
|
|
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| func (iccf *inClusterConfigFilter) SupportedResourceAndVerbs() map[string]sets.String { | ||
| return map[string]sets.String{ | ||
| "configmaps": sets.NewString("get", "list", "watch"), | ||
| } | ||
| } | ||
|
|
||
| func (iccf *inClusterConfigFilter) Filter(req *http.Request, rc io.ReadCloser, stopCh <-chan struct{}) (int, io.ReadCloser, error) { | ||
| handler := NewInClusterConfigFilterHandler() | ||
| return filter.NewFilterReadCloser(req, iccf.serializerManager, rc, handler, iccf.Name(), stopCh) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,85 @@ | ||
| /* | ||
| Copyright 2023 The OpenYurt 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 inclusterconfig | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "strings" | ||
|
|
||
| v1 "k8s.io/api/core/v1" | ||
| "k8s.io/apimachinery/pkg/runtime" | ||
| "k8s.io/klog/v2" | ||
|
|
||
| "github.com/openyurtio/openyurt/pkg/yurthub/filter" | ||
| ) | ||
|
|
||
| const ( | ||
| KubeProxyConfigMapNamespace = "kube-system" | ||
| KubeProxyConfigMapName = "kube-proxy" | ||
| KubeProxyDataKey = "config.conf" | ||
| KubeProxyKubeConfigStr = "kubeconfig" | ||
| ) | ||
|
|
||
| type inClusterConfigFilterHandler struct{} | ||
|
|
||
| func NewInClusterConfigFilterHandler() filter.ObjectHandler { | ||
| return &inClusterConfigFilterHandler{} | ||
| } | ||
|
|
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| // RuntimeObjectFilter comments kubeconfig in kube-system/kube-proxy configmap in the response object | ||
| func (fh *inClusterConfigFilterHandler) RuntimeObjectFilter(obj runtime.Object) (runtime.Object, bool) { | ||
| switch v := obj.(type) { | ||
| case *v1.ConfigMapList: | ||
| for i := range v.Items { | ||
| newCM, mutated := mutateKubeProxyConfigMap(&v.Items[i]) | ||
| if mutated { | ||
| v.Items[i] = *newCM | ||
| break | ||
| } | ||
| } | ||
| return v, false | ||
| case *v1.ConfigMap: | ||
| cm, _ := mutateKubeProxyConfigMap(v) | ||
| return cm, false | ||
| default: | ||
| return v, false | ||
| } | ||
| } | ||
|
|
||
| func mutateKubeProxyConfigMap(cm *v1.ConfigMap) (*v1.ConfigMap, bool) { | ||
| mutated := false | ||
| if cm.Namespace == KubeProxyConfigMapNamespace && cm.Name == KubeProxyConfigMapName { | ||
| if cm.Data != nil && len(cm.Data[KubeProxyDataKey]) != 0 { | ||
| parts := make([]string, 0) | ||
| for _, line := range strings.Split(cm.Data[KubeProxyDataKey], "\n") { | ||
| items := strings.Split(strings.Trim(line, " "), ":") | ||
| if len(items) == 2 && items[0] == KubeProxyKubeConfigStr { | ||
| parts = append(parts, strings.Replace(line, KubeProxyKubeConfigStr, fmt.Sprintf("#%s", KubeProxyKubeConfigStr), 1)) | ||
| mutated = true | ||
| } else { | ||
| parts = append(parts, line) | ||
| } | ||
| } | ||
| if mutated { | ||
| cm.Data[KubeProxyDataKey] = strings.Join(parts, "\n") | ||
| klog.Infof("kubeconfig in configmap(%s/%s) has been commented, new config.conf: \n%s\n", cm.Namespace, cm.Name, cm.Data[KubeProxyDataKey]) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| return cm, mutated | ||
| } |
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