Add support for both the new and old events APIs simultaneously.

Signed-off-by: Borja Clemente <borja.clemente@gmail.com>

Author: clebs

pkg/cluster/cluster.go

@@ -33,10 +33,13 @@ import (
 	"sigs.k8s.io/controller-runtime/pkg/client/apiutil"
 	logf "sigs.k8s.io/controller-runtime/pkg/internal/log"
 	intrec "sigs.k8s.io/controller-runtime/pkg/internal/recorder"
+	"sigs.k8s.io/controller-runtime/pkg/recorder"
 )
 
 // Cluster provides various methods to interact with a cluster.
 type Cluster interface {
+	recorder.Provider
+
 	// GetHTTPClient returns an HTTP client that can be used to talk to the apiserver
 	GetHTTPClient() *http.Client
 
@@ -58,9 +61,6 @@ type Cluster interface {
 	// GetFieldIndexer returns a client.FieldIndexer configured with the client
 	GetFieldIndexer() client.FieldIndexer
 
-	// GetEventRecorder returns a new EventRecorder for the provided name
-	GetEventRecorder(name string) events.EventRecorder
-
 	// GetRESTMapper returns a RESTMapper
 	GetRESTMapper() meta.RESTMapper
 

pkg/cluster/internal.go

@@ -25,6 +25,7 @@ import (
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/client-go/rest"
 	"k8s.io/client-go/tools/events"
+	"k8s.io/client-go/tools/record"
 
 	"sigs.k8s.io/controller-runtime/pkg/cache"
 	"sigs.k8s.io/controller-runtime/pkg/client"
@@ -87,6 +88,10 @@ func (c *cluster) GetEventRecorder(name string) events.EventRecorder {
 	return c.recorderProvider.GetEventRecorder(name)
 }
 
+func (c *cluster) GetOldEventRecorder(name string) record.EventRecorder {
+	return c.recorderProvider.GetOldEventRecorder(name)
+}
+
 func (c *cluster) GetRESTMapper() meta.RESTMapper {
 	return c.mapper
 }

pkg/internal/recorder/recorder.go

@@ -27,6 +27,7 @@ import (
 	eventsv1client "k8s.io/client-go/kubernetes/typed/events/v1"
 	"k8s.io/client-go/rest"
 	"k8s.io/client-go/tools/events"
+	"k8s.io/client-go/tools/record"
 )
 
 // EventBroadcasterProducer makes an event broadcaster, returning
@@ -136,6 +137,17 @@ func (p *Provider) GetEventRecorder(name string) events.EventRecorder {
 	}
 }
 
+// GetOldEventRecorder returns an event recorder that broadcasts to this provider's
+// broadcaster.  All events will be associated with a component of the given name.
+func (p *Provider) GetOldEventRecorder(name string) record.EventRecorder {
+	return &oldRecorder{
+		newRecorder: &lazyRecorder{
+			prov: p,
+			name: name,
+		},
+	}
+}
+
 // lazyRecorder is a recorder that doesn't actually instantiate any underlying
 // recorder until the first event is emitted.
 type lazyRecorder struct {
@@ -163,3 +175,22 @@ func (l *lazyRecorder) Eventf(regarding runtime.Object, related runtime.Object,
 	}
 	l.prov.lock.RUnlock()
 }
+
+// oldRecorder is a wrapper around the events.EventRecorder that implements the old record.EventRecorder API.
+// This is a temporary solution to support both the old and new events APIs without duplicating everything.
+// Internally it calls the new events API from the old API funcs and no longer supported parameters are ignored (e.g. annotations).
+type oldRecorder struct {
+	newRecorder *lazyRecorder
+}
+
+func (l *oldRecorder) Event(object runtime.Object, eventtype, reason, message string) {
+	l.newRecorder.Eventf(object, nil, eventtype, reason, "unsupported", message)
+}
+
+func (l *oldRecorder) Eventf(object runtime.Object, eventtype, reason, messageFmt string, args ...interface{}) {
+	l.newRecorder.Eventf(object, nil, eventtype, reason, "unsupported", messageFmt, args...)
+}
+
+func (l *oldRecorder) AnnotatedEventf(object runtime.Object, annotations map[string]string, eventtype, reason, messageFmt string, args ...interface{}) {
+	l.newRecorder.Eventf(object, nil, eventtype, reason, "unsupported", messageFmt, args...)
+}

pkg/leaderelection/leader_election.go

@@ -126,10 +126,9 @@ func NewResourceLock(config *rest.Config, recorderProvider recorder.Provider, op
 		options.LeaderElectionID,
 		corev1Client,
 		coordinationClient,
-		// TODO(clebs): figure out how to solve this.
 		resourcelock.ResourceLockConfig{
 			Identity:      id,
-			EventRecorder: recorderProvider.GetEventRecorder(id),
+			EventRecorder: recorderProvider.GetOldEventRecorder(id),
 		},
 		options.LeaderLabels,
 	)

pkg/manager/internal.go

@@ -35,6 +35,7 @@ import (
 	"k8s.io/client-go/tools/events"
 	"k8s.io/client-go/tools/leaderelection"
 	"k8s.io/client-go/tools/leaderelection/resourcelock"
+	"k8s.io/client-go/tools/record"
 
 	"sigs.k8s.io/controller-runtime/pkg/cache"
 	"sigs.k8s.io/controller-runtime/pkg/client"
@@ -259,6 +260,10 @@ func (cm *controllerManager) GetEventRecorder(name string) events.EventRecorder
 	return cm.cluster.GetEventRecorder(name)
 }
 
+func (cm *controllerManager) GetOldEventRecorder(name string) record.EventRecorder {
+	return cm.cluster.GetOldEventRecorder(name)
+}
+
 func (cm *controllerManager) GetRESTMapper() meta.RESTMapper {
 	return cm.cluster.GetRESTMapper()
 }

pkg/manager/manager.go

@@ -29,7 +29,6 @@ import (
 	corev1 "k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/api/meta"
 	"k8s.io/apimachinery/pkg/runtime"
-	"k8s.io/client-go/kubernetes"
 	"k8s.io/client-go/rest"
 	"k8s.io/client-go/tools/events"
 	"k8s.io/client-go/tools/leaderelection/resourcelock"

pkg/recorder/recorder.go

@@ -22,10 +22,13 @@ package recorder
 
 import (
 	"k8s.io/client-go/tools/events"
+	"k8s.io/client-go/tools/record"
 )
 
 // Provider knows how to generate new event recorders with given name.
 type Provider interface {
 	// NewRecorder returns an EventRecorder with given name.
 	GetEventRecorder(name string) events.EventRecorder
+	// GetOldEventRecorder returns an EventRecorder for the old events API.
+	GetOldEventRecorder(name string) record.EventRecorder
 }