/
run.go
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/
run.go
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// Copyright 2022 Google LLC
//
// 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 runner
import (
"flag"
"fmt"
"github.com/go-logr/logr"
apiextensionsv1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
"k8s.io/apimachinery/pkg/runtime"
clientgoscheme "k8s.io/client-go/kubernetes/scheme"
_ "k8s.io/client-go/plugin/pkg/client/auth/gcp" // register gcp auth provider plugin
"kpt.dev/configsync/pkg/api/kpt.dev/v1alpha1"
"kpt.dev/configsync/pkg/resourcegroup/controllers/log"
ocmetrics "kpt.dev/configsync/pkg/resourcegroup/controllers/metrics"
"kpt.dev/configsync/pkg/resourcegroup/controllers/profiler"
"kpt.dev/configsync/pkg/resourcegroup/controllers/resourcegroup"
"kpt.dev/configsync/pkg/resourcegroup/controllers/resourcemap"
"kpt.dev/configsync/pkg/resourcegroup/controllers/root"
"kpt.dev/configsync/pkg/resourcegroup/controllers/typeresolver"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/event"
// +kubebuilder:scaffold:imports
)
var (
scheme = runtime.NewScheme()
setupLog = ctrl.Log.WithName("setup")
)
// Run starts all controllers and returns an integer exit code.
func Run() int {
if err := run(); err != nil {
setupLog.Error(err, "exiting")
return 1
}
return 0
}
func run() error {
_ = clientgoscheme.AddToScheme(scheme)
_ = v1alpha1.AddToScheme(scheme)
// +kubebuilder:scaffold:scheme
_ = apiextensionsv1.AddToScheme(scheme)
log.InitFlags()
var metricsAddr string
var enableLeaderElection bool
flag.StringVar(&metricsAddr, "metrics-addr", ":8080", "The address the metric endpoint binds to.")
flag.BoolVar(&enableLeaderElection, "enable-leader-election", false,
"Enable leader election for controller manager. "+
"Enabling this will ensure there is only one active controller manager.")
flag.Parse()
profiler.Service()
// Register the OpenCensus views
if err := ocmetrics.RegisterReconcilerMetricsViews(); err != nil {
return fmt.Errorf("failed to register OpenCensus views: %w", err)
}
// Register the OC Agent exporter
oce, err := ocmetrics.RegisterOCAgentExporter()
if err != nil {
return fmt.Errorf("failed to register the OC Agent exporter: %w", err)
}
defer func() {
if err := oce.Stop(); err != nil {
setupLog.Error(err, "Unable to stop the OC Agent exporter")
}
}()
mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
Scheme: scheme,
MetricsBindAddress: metricsAddr,
Port: 9443,
LeaderElection: enableLeaderElection,
LeaderElectionID: "413d8c8e.gke.io",
})
if err != nil {
return fmt.Errorf("failed to build manager: %w", err)
}
logger := ctrl.Log.WithName("controllers")
for _, group := range []string{root.KptGroup} {
if err := registerControllersForGroup(mgr, logger, group); err != nil {
return fmt.Errorf("failed to register controllers for group %s: %w", group, err)
}
}
// +kubebuilder:scaffold:builder
setupLog.Info("starting manager")
if err := mgr.Start(ctrl.SetupSignalHandler()); err != nil {
return fmt.Errorf("failed to start controller-manager: %w", err)
}
return nil
}
func registerControllersForGroup(mgr ctrl.Manager, logger logr.Logger, group string) error {
// channel is watched by ResourceGroup controller.
// The Root controller pushes events to it and
// the ResourceGroup controller consumes events.
channel := make(chan event.GenericEvent)
setupLog.Info("adding the type resolver")
resolver, err := typeresolver.NewTypeResolver(mgr, logger.WithName("TypeResolver"))
if err != nil {
return fmt.Errorf("unable to set up the type resolver: %w", err)
}
resolver.Refresh()
setupLog.Info("adding the Root controller for group " + group)
resMap := resourcemap.NewResourceMap()
if err := root.NewController(mgr, channel, logger.WithName("Root"), resolver, group, resMap); err != nil {
return fmt.Errorf("unable to create the root controller for group %s: %w", group, err)
}
setupLog.Info("adding the ResourceGroup controller for group " + group)
if err := resourcegroup.NewRGController(mgr, channel, logger.WithName(v1alpha1.ResourceGroupKind), resolver, resMap, resourcegroup.DefaultDuration); err != nil {
return fmt.Errorf("unable to create the ResourceGroup controller %s: %w", group, err)
}
return nil
}