/
events.go
82 lines (74 loc) · 2.35 KB
/
events.go
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// Copyright (c) 2021 Terminus, Inc.
//
// 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 logic
import (
"context"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/meta"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
corev1client "k8s.io/client-go/kubernetes/typed/core/v1"
"k8s.io/client-go/tools/reference"
"k8s.io/kubectl/pkg/scheme"
)
const (
DefaultEventsLimit = 5
)
var metadataAccessor = meta.NewAccessor()
// SearchEvents finds events about the specified object.
func SearchEvents(client corev1client.EventsGetter, objOrRef runtime.Object) (*corev1.EventList, error) {
ref, err := reference.GetReference(scheme.Scheme, objOrRef)
if err != nil {
return nil, err
}
stringRefKind := string(ref.Kind)
var refKind *string
if len(stringRefKind) > 0 {
refKind = &stringRefKind
}
stringRefUID := string(ref.UID)
var refUID *string
if len(stringRefUID) > 0 {
refUID = &stringRefUID
}
e := client.Events(ref.Namespace)
fieldSelector := e.GetFieldSelector(&ref.Name, &ref.Namespace, refKind, refUID)
initialOpts := metav1.ListOptions{FieldSelector: fieldSelector.String(), Limit: DefaultEventsLimit}
eventList := &corev1.EventList{}
err = FollowContinue(&initialOpts,
func(options metav1.ListOptions) (runtime.Object, error) {
newEvents, err := e.List(context.Background(), options)
if err != nil {
return nil, err
}
eventList.Items = append(eventList.Items, newEvents.Items...)
return newEvents, nil
})
return eventList, err
}
func FollowContinue(initialOpts *metav1.ListOptions,
listFunc func(metav1.ListOptions) (runtime.Object, error)) error {
opts := initialOpts
for {
list, err := listFunc(*opts)
if err != nil {
return err
}
nextContinueToken, _ := metadataAccessor.Continue(list)
if len(nextContinueToken) == 0 {
return nil
}
opts.Continue = nextContinueToken
}
}