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main.go
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main.go
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/*
Copyright 2023 The Janus IDP 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 main
import (
"flag"
"os"
"runtime"
"time"
// Import all Kubernetes client auth plugins (e.g. Azure, GCP, OIDC, etc.)
_ "k8s.io/client-go/plugin/pkg/client/auth"
"github.com/janus-idp/backstage-operator/pkg/hooks"
"github.com/operator-framework/helm-operator-plugins/pkg/annotation"
"github.com/operator-framework/helm-operator-plugins/pkg/reconciler"
"github.com/operator-framework/helm-operator-plugins/pkg/watches"
ctrlruntime "k8s.io/apimachinery/pkg/runtime"
utilruntime "k8s.io/apimachinery/pkg/util/runtime"
clientgoscheme "k8s.io/client-go/kubernetes/scheme"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/client/config"
"sigs.k8s.io/controller-runtime/pkg/healthz"
"sigs.k8s.io/controller-runtime/pkg/log/zap"
//+kubebuilder:scaffold:imports
)
var (
scheme = ctrlruntime.NewScheme()
setupLog = ctrl.Log.WithName("setup")
defaultMaxConcurrentReconciles = runtime.NumCPU()
defaultReconcilePeriod = time.Minute
)
func init() {
utilruntime.Must(clientgoscheme.AddToScheme(scheme))
//+kubebuilder:scaffold:scheme
}
func main() {
var (
metricsAddr string
leaderElectionID string
watchesPath string
probeAddr string
enableLeaderElection bool
)
flag.StringVar(&metricsAddr, "metrics-bind-address", ":8080", "The address the metric endpoint binds to.")
flag.StringVar(&probeAddr, "health-probe-bind-address", ":8081", "The address the probe endpoint binds to.")
flag.StringVar(&watchesPath, "watches-file", "watches.yaml", "path to watches file")
flag.StringVar(&leaderElectionID, "leader-election-id", "c6ea4a02.janus-idp.io", "provide leader election")
flag.BoolVar(&enableLeaderElection, "leader-elect", false,
"Enable leader election for controller manager. "+
"Enabling this will ensure there is only one active controller manager.")
opts := zap.Options{
Development: true,
}
opts.BindFlags(flag.CommandLine)
flag.Parse()
ctrl.SetLogger(zap.New(zap.UseFlagOptions(&opts)))
mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
Scheme: scheme,
MetricsBindAddress: metricsAddr,
Port: 9443,
HealthProbeBindAddress: probeAddr,
LeaderElection: enableLeaderElection,
LeaderElectionID: leaderElectionID,
})
if err != nil {
setupLog.Error(err, "unable to start manager")
os.Exit(1)
}
//+kubebuilder:scaffold:builder
if err := mgr.AddHealthzCheck("healthz", healthz.Ping); err != nil {
setupLog.Error(err, "unable to set up health check")
os.Exit(1)
}
if err := mgr.AddReadyzCheck("readyz", healthz.Ping); err != nil {
setupLog.Error(err, "unable to set up ready check")
os.Exit(1)
}
ws, err := watches.Load(watchesPath)
if err != nil {
setupLog.Error(err, "Failed to create new manager factories")
os.Exit(1)
}
for _, w := range ws {
// Register controller with the factory
reconcilePeriod := defaultReconcilePeriod
if w.ReconcilePeriod != nil {
reconcilePeriod = w.ReconcilePeriod.Duration
}
maxConcurrentReconciles := defaultMaxConcurrentReconciles
if w.MaxConcurrentReconciles != nil {
maxConcurrentReconciles = *w.MaxConcurrentReconciles
}
cl, err := client.New(config.GetConfigOrDie(), client.Options{})
if err != nil {
setupLog.Error(err, "Failed to create new client")
os.Exit(1)
}
setClusterRouterBaseHook := &hooks.SetClusterRouterBase{
Client: cl,
}
r, err := reconciler.New(
reconciler.WithChart(*w.Chart),
reconciler.WithGroupVersionKind(w.GroupVersionKind),
reconciler.WithOverrideValues(w.OverrideValues),
reconciler.SkipDependentWatches(w.WatchDependentResources != nil && !*w.WatchDependentResources),
reconciler.WithMaxConcurrentReconciles(maxConcurrentReconciles),
reconciler.WithReconcilePeriod(reconcilePeriod),
reconciler.WithInstallAnnotations(annotation.DefaultInstallAnnotations...),
reconciler.WithUpgradeAnnotations(annotation.DefaultUpgradeAnnotations...),
reconciler.WithUninstallAnnotations(annotation.DefaultUninstallAnnotations...),
reconciler.WithPreHook(setClusterRouterBaseHook),
)
if err != nil {
setupLog.Error(err, "unable to create helm reconciler", "controller", "Helm")
os.Exit(1)
}
if err := r.SetupWithManager(mgr); err != nil {
setupLog.Error(err, "unable to create controller", "controller", "Helm")
os.Exit(1)
}
setupLog.Info("configured watch", "gvk", w.GroupVersionKind, "chartPath", w.ChartPath, "maxConcurrentReconciles", maxConcurrentReconciles, "reconcilePeriod", reconcilePeriod)
}
setupLog.Info("starting manager")
if err := mgr.Start(ctrl.SetupSignalHandler()); err != nil {
setupLog.Error(err, "problem running manager")
os.Exit(1)
}
}