recorder.go

/*
Copyright The Voyager Authors.

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 eventer

import (
	"fmt"
	"time"

	"github.com/appscode/go/log"

	core "k8s.io/api/core/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/runtime"
	"k8s.io/client-go/kubernetes"
	"k8s.io/client-go/kubernetes/scheme"
	"k8s.io/client-go/tools/record"
	"k8s.io/client-go/tools/reference"
)

const (
	// Certificate Events
	EventReasonCertificateIssueFailed     = "IssueFailed"
	EventReasonCertificateIssueSuccessful = "IssueSuccessful"
	EventReasonCertificateInvalid         = "CertificateInvalid"
	EventReasonCertificateMigration       = "CertificateMigration"

	// Ingress Events
	EventReasonIngressConfigMapReconcileFailed        = "ConfigMapReconcileFailed"
	EventReasonIngressConfigMapReconcileSuccessful    = "ConfigMapReconcileSuccessful"
	EventReasonIngressDeploymentReconcileFailed       = "DeploymentReconcileFailed"
	EventReasonIngressDeploymentReconcileSuccessful   = "DeploymentReconcileSuccessful"
	EventReasonIngressFirewallUpdateFailed            = "FirewallUpdateFailed"
	EventReasonIngressHAProxyConfigReconcileFailed    = "HAProxyConfigFailed"
	EventReasonIngressInvalid                         = "IngressInvalid"
	EventReasonIngressMonitorAgentReconcileFailed     = "MonitorAgentReconcileFailed"
	EventReasonIngressMonitorAgentReconcileSuccessful = "MonitorAgentReconcileSuccessful"
	EventReasonIngressRBACFailed                      = "RBACFailed"
	EventReasonIngressRBACSuccessful                  = "RBACSuccessful"
	EventReasonIngressServiceReconcileFailed          = "ServiceReconcileFailed"
	EventReasonIngressServiceReconcileSuccessful      = "ServiceReconcileSuccessful"
	EventReasonIngressStatsServiceDeleteFailed        = "StatsServiceDeleteFailed"
	EventReasonIngressStatsServiceDeleteSuccessful    = "StatsServiceDeleteSuccessful"
	EventReasonIngressStatsServiceReconcileFailed     = "StatsServiceReconcileFailed"
	EventReasonIngressStatsServiceReconcileSuccessful = "StatsServiceReconcileSuccessful"
	EventReasonIngressTLSMountFailed                  = "TLSMountFailed"
	EventReasonBackendInvalid                         = "BackendInvalid"
	EventReasonAdmissionWebhookNotActivated           = "AdmissionWebhookNotActivated"
)

func NewEventRecorder(client kubernetes.Interface, component string) record.EventRecorder {
	// Event Broadcaster
	broadcaster := record.NewBroadcaster()
	broadcaster.StartEventWatcher(
		func(event *core.Event) {
			if _, err := client.CoreV1().Events(event.Namespace).Create(event); err != nil {
				log.Errorln(err)
			}
		},
	)
	// Event Recorder
	return broadcaster.NewRecorder(scheme.Scheme, core.EventSource{Component: component})
}

func CreateEvent(client kubernetes.Interface, component string, obj runtime.Object, eventType, reason, message string) (*core.Event, error) {
	ref, err := reference.GetReference(scheme.Scheme, obj)
	if err != nil {
		return nil, err
	}

	t := metav1.Time{Time: time.Now()}

	return client.CoreV1().Events(ref.Namespace).Create(&core.Event{
		ObjectMeta: metav1.ObjectMeta{
			Name:      fmt.Sprintf("%v.%x", ref.Name, t.UnixNano()),
			Namespace: ref.Namespace,
		},
		InvolvedObject: *ref,
		Reason:         reason,
		Message:        message,
		FirstTimestamp: t,
		LastTimestamp:  t,
		Count:          1,
		Type:           eventType,
		Source:         core.EventSource{Component: component},
	})
}

func CreateEventWithLog(client kubernetes.Interface, component string, obj runtime.Object, eventType, reason, message string) {
	event, err := CreateEvent(client, component, obj, eventType, reason, message)
	if err != nil {
		log.Errorln("Failed to write event, reason: ", err)
	} else {
		log.Infoln("Event created: ", event.Name)
	}
}