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event.go
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event.go
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package event
import (
"fmt"
"github.com/pkg/errors"
"k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/kubernetes/scheme"
typedcorev1 "k8s.io/client-go/kubernetes/typed/core/v1"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/record"
)
const (
// TypeNormal is the information event type
TypeNormal = Type("Normal")
// TypeWarning is the warning event type, informs that something went wrong
TypeWarning = Type("Warning")
)
// Type is the type of event
type Type string
// Reason is the type of reason message, used in evant
type Reason string
// Recorder is the interface used to emit events
type Recorder interface {
Emit(object runtime.Object, eventType Type, reason Reason, message string)
Emitf(object runtime.Object, eventType Type, reason Reason, format string, args ...interface{})
}
type recorder struct {
recorder record.EventRecorder
}
// New returns recorder used to emit events
func New(config *rest.Config, component string) (Recorder, error) {
eventRecorder, err := initializeEventRecorder(config, component)
if err != nil {
return nil, err
}
return &recorder{
recorder: eventRecorder,
}, nil
}
func initializeEventRecorder(config *rest.Config, component string) (record.EventRecorder, error) {
client, err := kubernetes.NewForConfig(config)
if err != nil {
return nil, errors.WithStack(err)
}
eventBroadcaster := record.NewBroadcaster()
//eventBroadcaster.StartLogging(glog.Infof) TODO integrate with proper logger
eventBroadcaster.StartRecordingToSink(
&typedcorev1.EventSinkImpl{
Interface: client.CoreV1().Events("")})
eventRecorder := eventBroadcaster.NewRecorder(
scheme.Scheme,
v1.EventSource{Component: component},
)
return eventRecorder, nil
}
func (r recorder) Emit(object runtime.Object, eventType Type, reason Reason, message string) {
r.recorder.Event(object, string(eventType), string(reason), message)
}
func (r recorder) Emitf(object runtime.Object, eventType Type, reason Reason, format string, args ...interface{}) {
r.recorder.Event(object, string(eventType), string(reason), fmt.Sprintf(format, args...))
}