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run.go
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run.go
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package main
import (
"net"
"time"
"github.com/topolvm/pvc-autoresizer/internal/hooks"
"github.com/topolvm/pvc-autoresizer/internal/runners"
corev1 "k8s.io/api/core/v1"
storagev1 "k8s.io/api/storage/v1"
"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/cache"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/healthz"
"sigs.k8s.io/controller-runtime/pkg/log/zap"
metricsserver "sigs.k8s.io/controller-runtime/pkg/metrics/server"
"sigs.k8s.io/controller-runtime/pkg/webhook"
"sigs.k8s.io/controller-runtime/pkg/webhook/admission"
//+kubebuilder:scaffold:imports
)
var (
scheme = runtime.NewScheme()
setupLog = ctrl.Log.WithName("setup")
)
func init() {
utilruntime.Must(clientgoscheme.AddToScheme(scheme))
utilruntime.Must(corev1.AddToScheme(scheme))
//+kubebuilder:scaffold:scheme
}
func subMain() error {
ctrl.SetLogger(zap.New(zap.UseDevMode(config.development)))
hookHost, portStr, err := net.SplitHostPort(config.webhookAddr)
if err != nil {
setupLog.Error(err, "invalid webhook addr")
return err
}
hookPort, err := net.LookupPort("tcp", portStr)
if err != nil {
setupLog.Error(err, "invalid webhook port")
return err
}
graceTimeout := 10 * time.Second
var pvcCacheTarget cache.ByObject
if len(config.namespaces) == 0 {
pvcCacheTarget = cache.ByObject{
Namespaces: map[string]cache.Config{
cache.AllNamespaces: {},
},
}
} else {
pvcCacheTarget = cache.ByObject{
Namespaces: map[string]cache.Config{},
}
for _, ns := range config.namespaces {
pvcCacheTarget.Namespaces[ns] = cache.Config{}
}
}
mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
Scheme: scheme,
WebhookServer: webhook.NewServer(webhook.Options{
Host: hookHost,
Port: hookPort,
CertDir: config.certDir,
}),
Metrics: metricsserver.Options{
BindAddress: config.metricsAddr,
},
Cache: cache.Options{
ByObject: map[client.Object]cache.ByObject{
&corev1.PersistentVolumeClaim{}: pvcCacheTarget,
&storagev1.StorageClass{}: {},
},
},
HealthProbeBindAddress: config.healthAddr,
LeaderElection: true,
LeaderElectionID: "49e22f61.topolvm.io",
GracefulShutdownTimeout: &graceTimeout,
})
if err != nil {
setupLog.Error(err, "unable to start manager")
return err
}
if err := mgr.AddHealthzCheck("ping", healthz.Ping); err != nil {
return err
}
if err := mgr.AddReadyzCheck("ping", healthz.Ping); err != nil {
return err
}
if err := mgr.AddReadyzCheck("webhook", mgr.GetWebhookServer().StartedChecker()); err != nil {
return err
}
var metricsClient runners.MetricsClient
if config.useK8sMetricsApi {
metricsClient, err = runners.NewK8sMetricsApiClient()
} else if config.prometheusURL != "" {
metricsClient, err = runners.NewPrometheusClient(config.prometheusURL)
} else {
setupLog.Error(err, "enable use-k8s-metrics-api or provide prometheus-url")
return err
}
if err != nil {
setupLog.Error(err, "unable to initialize metrics client")
return err
}
if err := runners.SetupIndexer(mgr, config.skipAnnotation); err != nil {
setupLog.Error(err, "unable to initialize pvc autoresizer")
return err
}
pvcAutoresizer := runners.NewPVCAutoresizer(metricsClient, mgr.GetClient(),
ctrl.Log.WithName("pvc-autoresizer"),
config.watchInterval, mgr.GetEventRecorderFor("pvc-autoresizer"))
if err := mgr.Add(pvcAutoresizer); err != nil {
setupLog.Error(err, "unable to add autoresier to manager")
return err
}
dec := admission.NewDecoder(scheme)
if err = hooks.SetupPersistentVolumeClaimWebhook(mgr, dec, ctrl.Log.WithName("hooks")); err != nil {
setupLog.Error(err, "unable to create PersistentVolumeClaim webhook")
return err
}
//+kubebuilder:scaffold:builder
setupLog.Info("starting manager")
if err := mgr.Start(ctrl.SetupSignalHandler()); err != nil {
setupLog.Error(err, "problem running manager")
return err
}
return nil
}