recorder

package main

import (
	corev1 "k8s.io/api/core/v1"

	"sigs.k8s.io/controller-runtime/pkg/recorder"
)

var (
	recorderProvider recorder.Provider
	somePod          *corev1.Pod
)

func main() {
	// recorderProvider is a recorder.Provider
	recorder := recorderProvider.GetEventRecorderFor("my-controller")

	// emit an event with a fixed message
	recorder.Event(somePod, corev1.EventTypeWarning,
		"WrongTrousers", "It's the wrong trousers, Gromit!")
}

Output:

package main

import (
	corev1 "k8s.io/api/core/v1"

	"sigs.k8s.io/controller-runtime/pkg/recorder"
)

var (
	recorderProvider recorder.Provider
	somePod          *corev1.Pod
)

func main() {
	// recorderProvider is a recorder.Provider
	recorder := recorderProvider.GetEventRecorderFor("my-controller")

	// emit an event with a variable message
	mildCheese := "Wensleydale"
	recorder.Eventf(somePod, corev1.EventTypeNormal,
		"DislikesCheese", "Not even %s?", mildCheese)
}

Output:

package main

import (
	"time"

	corev1 "k8s.io/api/core/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"

	"sigs.k8s.io/controller-runtime/pkg/recorder"
)

var (
	recorderProvider recorder.Provider
	somePod          *corev1.Pod
)

func main() {
	// recorderProvider is a recorder.Provider
	recorder := recorderProvider.GetEventRecorderFor("my-controller")

	// emit a backdated event (potentially with variable message)
	recorder.PastEventf(somePod, metav1.Time{Time: time.Now().Add(-5 * time.Minute)},
		corev1.EventTypeWarning, "ForgottenCrackers",
		"Crackers, Gromit!  We forgot the crackers!")
}

Output: