Add initial controller boilerplate and example controller

Signed-off-by: Monis Khan <mok@vmware.com>

test/integration/examplecontroller/starter/starter.go

@@ -0,0 +1,56 @@
+/*
+Copyright 2020 VMware, Inc.
+SPDX-License-Identifier: Apache-2.0
+*/
+
+package starter
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"k8s.io/client-go/informers"
+	"k8s.io/client-go/kubernetes"
+	"k8s.io/client-go/rest"
+	"k8s.io/client-go/tools/events"
+
+	"github.com/suzerain-io/placeholder-name/internal/controller"
+	examplecontroller "github.com/suzerain-io/placeholder-name/test/integration/examplecontroller/controller"
+)
+
+func StartExampleController(ctx context.Context, config *rest.Config, secretData string) error {
+	kubeClient, err := kubernetes.NewForConfig(config)
+	if err != nil {
+		return fmt.Errorf("failed to build client: %w", err)
+	}
+
+	kubeInformers := informers.NewSharedInformerFactory(kubeClient, 20*time.Minute)
+
+	recorder := events.NewEventBroadcasterAdapter(kubeClient).NewRecorder("example-controller")
+
+	manager := controller.NewManager().
+		WithController(
+			examplecontroller.NewExampleCreatingController(
+				kubeInformers.Core().V1().Services(),
+				kubeInformers.Core().V1().Secrets(),
+				kubeClient.CoreV1(),
+				recorder,
+				secretData,
+			), 5,
+		).
+		WithController(
+			examplecontroller.NewExampleUpdatingController(
+				kubeInformers.Core().V1().Services(),
+				kubeInformers.Core().V1().Secrets(),
+				kubeClient.CoreV1(),
+				recorder,
+				secretData,
+			), 5,
+		)
+
+	kubeInformers.Start(ctx.Done())
+	go manager.Start(ctx)
+
+	return nil
+}