490ecffc52
Signed-off-by: tombokombo <tombo@sysart.tech> Signed-off-by: tombokombo <tombo@sysart.tech>
68 lines
2.2 KiB
Go
68 lines
2.2 KiB
Go
/*
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Copyright 2022 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package store
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import (
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"fmt"
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"strings"
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discoveryv1 "k8s.io/api/discovery/v1"
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apiNames "k8s.io/apiserver/pkg/storage/names"
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"k8s.io/client-go/tools/cache"
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)
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// EndpointSliceLister makes a Store that lists Endpoints.
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type EndpointSliceLister struct {
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cache.Store
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}
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// MatchByKey returns the EndpointsSlices of the Service matching key in the local Endpoint Store.
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func (s *EndpointSliceLister) MatchByKey(key string) ([]*discoveryv1.EndpointSlice, error) {
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var eps []*discoveryv1.EndpointSlice
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keyNsLen := strings.Index(key, "/")
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if keyNsLen < -1 {
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keyNsLen = 0
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} else {
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// count '/' char
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keyNsLen += 1
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}
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// filter endpointSlices owned by svc
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for _, listKey := range s.ListKeys() {
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if len(key) < (apiNames.MaxGeneratedNameLength+keyNsLen) && !strings.HasPrefix(listKey, key) {
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continue
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}
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// generated endpointslices names has truncated svc name as prefix when svc name is too long, we compare only non truncated part
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// https://github.com/kubernetes/ingress-nginx/issues/9240
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if len(key) >= (apiNames.MaxGeneratedNameLength+keyNsLen) && !strings.HasPrefix(listKey, key[:apiNames.MaxGeneratedNameLength+keyNsLen-1]) {
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continue
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}
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epss, exists, err := s.GetByKey(listKey)
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if exists && err == nil {
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// check for svc owner label
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if svcName, ok := epss.(*discoveryv1.EndpointSlice).ObjectMeta.GetLabels()[discoveryv1.LabelServiceName]; ok {
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namespace := epss.(*discoveryv1.EndpointSlice).ObjectMeta.GetNamespace()
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if key == fmt.Sprintf("%s/%s", namespace, svcName) {
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eps = append(eps, epss.(*discoveryv1.EndpointSlice))
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}
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}
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}
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}
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if len(eps) == 0 {
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return nil, NotExistsError(key)
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}
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return eps, nil
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}
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