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apiserver.go
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apiserver.go
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// Copyright 2023 Ant Group Co., Ltd.
//
// 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 source
import (
"fmt"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/fields"
kubeinformers "k8s.io/client-go/informers"
corev1informers "k8s.io/client-go/informers/core/v1"
"k8s.io/client-go/tools/cache"
kubetypes "k8s.io/kubernetes/pkg/kubelet/types"
"github.com/secretflow/kuscia/pkg/agent/utils/format"
"github.com/secretflow/kuscia/pkg/utils/nlog"
)
type sourceApiserver struct {
podInformerFactory kubeinformers.SharedInformerFactory
podInformer corev1informers.PodInformer
updates chan<- kubetypes.PodUpdate
}
func newApiserverSource(cfg *InitConfig, updates chan<- kubetypes.PodUpdate) *sourceApiserver {
podInformerFactory := kubeinformers.NewSharedInformerFactoryWithOptions(
cfg.KubeClient, 0,
kubeinformers.WithNamespace(cfg.Namespace),
kubeinformers.WithTweakListOptions(func(options *metav1.ListOptions) {
options.FieldSelector = fields.OneTermEqualSelector("spec.nodeName", string(cfg.NodeName)).String()
}))
podInformer := podInformerFactory.Core().V1().Pods()
s := &sourceApiserver{
podInformerFactory: podInformerFactory,
podInformer: podInformer,
updates: updates,
}
podInformer.Informer().AddEventHandler(cache.ResourceEventHandlerFuncs{
AddFunc: func(obj interface{}) {
pod, ok := obj.(*corev1.Pod)
if ok {
nlog.Infof("Receive pod %q add event from apiserver", format.Pod(pod))
s.updatePods([]*corev1.Pod{pod}, kubetypes.ADD)
}
},
UpdateFunc: func(oldObj, newObj interface{}) {
pod, ok := newObj.(*corev1.Pod)
if ok {
nlog.Infof("Receive pod %q update event from apiserver", format.Pod(pod))
s.updatePods([]*corev1.Pod{pod}, kubetypes.UPDATE)
}
},
DeleteFunc: func(obj interface{}) {
pod, ok := obj.(*corev1.Pod)
if ok {
nlog.Infof("Receive pod %q delete event from apiserver", format.Pod(pod))
s.updatePods([]*corev1.Pod{pod}, kubetypes.REMOVE)
}
},
})
return s
}
func (s *sourceApiserver) run(stopCh <-chan struct{}) error {
nlog.Info("Start running apiserver source")
go s.podInformerFactory.Start(stopCh)
// Wait for the caches to be synced before starting to do work.
if ok := cache.WaitForCacheSync(stopCh, s.podInformer.Informer().HasSynced); !ok {
return fmt.Errorf("failed to wait for pod caches to sync")
}
nlog.Info("Pod Informer: cache sync finished")
return nil
}
func (s *sourceApiserver) updatePods(pods []*corev1.Pod, op kubetypes.PodOperation) {
s.updates <- kubetypes.PodUpdate{Pods: pods, Op: op, Source: kubetypes.ApiserverSource}
}