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secret.go
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secret.go
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package server
import (
"fmt"
"go.uber.org/zap"
"time"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/client-go/informers"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/tools/cache"
)
func WatchSecret(client kubernetes.Interface, namespace, labelSelector string, stop <-chan struct{}, p *AuthProcessor) error {
selector, err := labels.Parse(labelSelector)
if err != nil {
return err
}
factory := informers.NewSharedInformerFactoryWithOptions(client, time.Hour, informers.WithNamespace(namespace))
factory.Core().V1().Secrets().Informer().AddEventHandler(cache.ResourceEventHandlerFuncs{
AddFunc: func(obj interface{}) {
secret, ok := obj.(*corev1.Secret)
if !ok {
return
}
if selector.Matches(labels.Set(secret.Labels)) {
if err := p.LoadFromSecret(nil, secret.Data); err != nil {
logger.Error(fmt.Sprintf(`load config from secret "%s/%s" error`, secret.Namespace, secret.Name), zap.String("func", "WatchSecret"))
}
}
},
UpdateFunc: func(old, new interface{}) {
secretOld, okOld := old.(*corev1.Secret)
secretNew, okNew := new.(*corev1.Secret)
if !okOld || !okNew {
return
}
matchOld := selector.Matches(labels.Set(secretOld.Labels))
matchNew := selector.Matches(labels.Set(secretNew.Labels))
var err error
if matchOld && matchNew {
err = p.LoadFromSecret(secretOld.Data, secretNew.Data)
} else if matchOld {
err = p.LoadFromSecret(secretOld.Data, nil)
} else if matchNew {
err = p.LoadFromSecret(nil, secretNew.Data)
}
if err != nil {
logger.Error(fmt.Sprintf(`update config from secret "%s/%s" error`, secretNew.Namespace, secretNew.Name), zap.String("func", "WatchSecret"))
}
},
DeleteFunc: func(obj interface{}) {
secret, ok := obj.(*corev1.Secret)
if !ok {
return
}
if selector.Matches(labels.Set(secret.Labels)) {
if err := p.LoadFromSecret(secret.Data, nil); err != nil {
logger.Error(fmt.Sprintf(`remove config from secret "%s/%s" error`, secret.Namespace, secret.Name), zap.String("func", "WatchSecret"))
}
}
},
})
factory.Start(stop)
for _, r := range factory.WaitForCacheSync(stop) {
if !r {
return fmt.Errorf("informer failed to WaitForCacheSync")
}
}
return nil
}