105 lines
3.5 KiB
Go
105 lines
3.5 KiB
Go
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/*
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Copyright 2023 Peter Kurfer.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package main
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import (
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"flag"
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"os"
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// Import all Kubernetes client auth plugins (e.g. Azure, GCP, OIDC, etc.)
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// to ensure that exec-entrypoint and run can make use of them.
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_ "k8s.io/client-go/plugin/pkg/client/auth"
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"k8s.io/apimachinery/pkg/runtime"
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utilruntime "k8s.io/apimachinery/pkg/util/runtime"
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clientgoscheme "k8s.io/client-go/kubernetes/scheme"
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ctrl "sigs.k8s.io/controller-runtime"
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"sigs.k8s.io/controller-runtime/pkg/healthz"
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"sigs.k8s.io/controller-runtime/pkg/log/zap"
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metricsserver "sigs.k8s.io/controller-runtime/pkg/metrics/server"
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//+kubebuilder:scaffold:imports
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)
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var (
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scheme = runtime.NewScheme()
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setupLog = ctrl.Log.WithName("setup")
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)
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func init() {
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utilruntime.Must(clientgoscheme.AddToScheme(scheme))
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//+kubebuilder:scaffold:scheme
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}
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func main() {
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var metricsAddr string
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var enableLeaderElection bool
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var probeAddr string
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flag.StringVar(&metricsAddr, "metrics-bind-address", ":8080", "The address the metric endpoint binds to.")
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flag.StringVar(&probeAddr, "health-probe-bind-address", ":8081", "The address the probe endpoint binds to.")
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flag.BoolVar(&enableLeaderElection, "leader-elect", false,
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"Enable leader election for controller manager. "+
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"Enabling this will ensure there is only one active controller manager.")
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opts := zap.Options{
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Development: true,
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}
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opts.BindFlags(flag.CommandLine)
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flag.Parse()
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ctrl.SetLogger(zap.New(zap.UseFlagOptions(&opts)))
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mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
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Scheme: scheme,
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Metrics: metricsserver.Options{BindAddress: metricsAddr},
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HealthProbeBindAddress: probeAddr,
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LeaderElection: enableLeaderElection,
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LeaderElectionID: "f856ddb2.icb4dc0.de",
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// LeaderElectionReleaseOnCancel defines if the leader should step down voluntarily
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// when the Manager ends. This requires the binary to immediately end when the
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// Manager is stopped, otherwise, this setting is unsafe. Setting this significantly
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// speeds up voluntary leader transitions as the new leader don't have to wait
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// LeaseDuration time first.
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//
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// In the default scaffold provided, the program ends immediately after
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// the manager stops, so would be fine to enable this option. However,
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// if you are doing or is intended to do any operation such as perform cleanups
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// after the manager stops then its usage might be unsafe.
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// LeaderElectionReleaseOnCancel: true,
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})
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if err != nil {
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setupLog.Error(err, "unable to start manager")
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os.Exit(1)
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}
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//+kubebuilder:scaffold:builder
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if err := mgr.AddHealthzCheck("healthz", healthz.Ping); err != nil {
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setupLog.Error(err, "unable to set up health check")
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os.Exit(1)
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}
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if err := mgr.AddReadyzCheck("readyz", healthz.Ping); err != nil {
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setupLog.Error(err, "unable to set up ready check")
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os.Exit(1)
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}
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setupLog.Info("starting manager")
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if err := mgr.Start(ctrl.SetupSignalHandler()); err != nil {
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setupLog.Error(err, "problem running manager")
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os.Exit(1)
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}
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}
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