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controller.go
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controller.go
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// Copyright Red Hat
package registeredcluster
import (
"context"
"fmt"
"os"
giterrors "github.com/pkg/errors"
singaporev1alpha1 "github.com/stolostron/compute-operator/api/singapore/v1alpha1"
"github.com/stolostron/compute-operator/pkg/helpers"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/client-go/dynamic"
"k8s.io/client-go/kubernetes"
clientgoscheme "k8s.io/client-go/kubernetes/scheme"
_ "k8s.io/client-go/plugin/pkg/client/auth/gcp"
"k8s.io/klog/v2"
"k8s.io/client-go/tools/clientcmd"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/healthz"
"sigs.k8s.io/controller-runtime/pkg/kcp"
apimachineryclient "github.com/kcp-dev/apimachinery/pkg/client"
"github.com/spf13/cobra"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
apiextensionsclient "k8s.io/apiextensions-apiserver/pkg/client/clientset/clientset"
addonv1alpha1 "open-cluster-management.io/api/addon/v1alpha1"
clusterapiv1 "open-cluster-management.io/api/cluster/v1"
clusterv1beta1 "open-cluster-management.io/api/cluster/v1beta1"
manifestworkv1 "open-cluster-management.io/api/work/v1"
authv1alpha1 "open-cluster-management.io/managed-serviceaccount/api/v1alpha1"
// +kubebuilder:scaffold:imports
)
var (
scheme = runtime.NewScheme()
setupLog = ctrl.Log.WithName("setup")
)
type managerOptions struct {
metricsAddr string
probeAddr string
enableLeaderElection bool
}
func init() {
_ = clientgoscheme.AddToScheme(scheme)
_ = singaporev1alpha1.AddToScheme(scheme)
_ = clusterapiv1.AddToScheme(scheme)
_ = clusterv1beta1.AddToScheme(scheme)
_ = addonv1alpha1.AddToScheme(scheme)
_ = authv1alpha1.AddToScheme(scheme)
_ = manifestworkv1.AddToScheme(scheme)
// +kubebuilder:scaffold:scheme
}
func NewManager() *cobra.Command {
o := &managerOptions{}
cmd := &cobra.Command{
Use: "manager",
Short: "manager for compute-operator",
Run: func(cmd *cobra.Command, args []string) {
o.run()
os.Exit(1)
},
}
cmd.Flags().StringVar(&o.metricsAddr, "metrics-addr", ":8080", "The address the metric endpoint binds to.")
cmd.Flags().StringVar(&o.probeAddr, "health-probe-bind-address", ":8081", "The address the probe endpoint binds to.")
cmd.Flags().BoolVar(&o.enableLeaderElection, "enable-leader-election", false,
"Enable leader election for controller manager. "+
"Enabling this will ensure there is only one active controller manager.")
return cmd
}
func (o *managerOptions) run() {
// ctrl.SetLogger(zap.New(zap.UseDevMode(true)))
ctrl.SetLogger(klog.NewKlogr())
// zapopts := zap.Options{}
// zapopts.BindFlags(goflag.CommandLine)
// ctrl.SetLogger(zap.New(zap.UseFlagOptions(&zapopts)))
setupLog.Info("Setup Manager")
// controller cluster clients
kubeClient := kubernetes.NewForConfigOrDie(ctrl.GetConfigOrDie())
dynamicClient := dynamic.NewForConfigOrDie(ctrl.GetConfigOrDie())
// apiExtensionClient := apiextensionsclient.NewForConfigOrDie(ctrl.GetConfigOrDie())
// hubApplierBuilder := clusteradmapply.NewApplierBuilder().WithClient(kubeClient, apiExtensionClient, dynamicClient).Build()
// get the clusterRegistrar
clusterRegistrarList, err := dynamicClient.Resource(helpers.GvrCR).List(context.TODO(), metav1.ListOptions{})
if err != nil {
setupLog.Error(giterrors.WithStack(err), "unable to read the clusterRegistrar")
os.Exit(1)
}
if len(clusterRegistrarList.Items) != 1 {
setupLog.Error(fmt.Errorf("zero or more than one clusterRegistrar"), "zero or more than one clusterRegistrar")
os.Exit(1)
}
// convert to cluster registrar
clusterRegistrar := &singaporev1alpha1.ClusterRegistrar{}
err = runtime.DefaultUnstructuredConverter.FromUnstructured(clusterRegistrarList.Items[0].Object, clusterRegistrar)
if err != nil {
setupLog.Error(giterrors.WithStack(err), "unable to convert the clusterRegistrar")
os.Exit(1)
}
// get Compute kubeconfig secret
podNamespace := os.Getenv("POD_NAMESPACE")
if len(podNamespace) == 0 {
setupLog.Error(fmt.Errorf("POD_NAMESPACE not set"), "")
os.Exit(1)
}
var computeKubeConfigSecretData []byte
computeKubeConfigSecret, err := kubeClient.CoreV1().
Secrets(podNamespace).
Get(context.TODO(), clusterRegistrar.Spec.ComputeService.ComputeKubeconfigSecretRef.Name, metav1.GetOptions{})
if err != nil {
setupLog.Error(giterrors.WithStack(err), fmt.Sprintf("unable to read the computeKubeconfigSecret: %s/%s",
podNamespace,
clusterRegistrar.Spec.ComputeService.ComputeKubeconfigSecretRef.Name))
os.Exit(1)
}
computeKubeConfigSecretData, ok := computeKubeConfigSecret.Data["kubeconfig"]
if !ok {
setupLog.Error(giterrors.WithStack(err), "computeKubeConfigSecret secret missing kubeconfig data")
os.Exit(1)
}
setupLog.Info("generate kubeConfigSecretData")
computeKubeconfig, err := clientcmd.RESTConfigFromKubeConfig(computeKubeConfigSecretData)
if err != nil {
setupLog.Error(giterrors.WithStack(err), "unable to create REST config for compute cluster")
os.Exit(1)
}
opts := ctrl.Options{
Scheme: scheme,
MetricsBindAddress: o.metricsAddr,
Port: 9443,
HealthProbeBindAddress: o.probeAddr,
LeaderElection: o.enableLeaderElection,
// The leader must be created on the compute-operator cluster and not on the compute service
LeaderElectionConfig: ctrl.GetConfigOrDie(),
LeaderElectionID: "628f2987.cluster-registration.io",
// NewCache: helpers.NewClusterAwareCacheFunc,
}
// cfg = apimachineryclient.NewClusterConfig(cfg)
// Save the compute
setupLog.Info("kcp server url:", "computeKubeconfig.Host", computeKubeconfig.Host)
cfg, err := helpers.RestConfigForAPIExport(context.TODO(), computeKubeconfig, "compute-apis", scheme)
if err != nil {
setupLog.Error(giterrors.WithStack(err), "error looking up virtual workspace URL")
os.Exit(1)
}
computeKubeconfig = apimachineryclient.NewClusterConfig(cfg)
computeKubeClient, err := kubernetes.NewForConfig(computeKubeconfig)
if err != nil {
setupLog.Error(giterrors.WithStack(err), "error creating kubernetes.ClusterClient for virtual workspace URL")
os.Exit(1)
}
computeDynamicClient, err := dynamic.NewForConfig(computeKubeconfig)
if err != nil {
setupLog.Error(giterrors.WithStack(err), "error creating dynamic.ClusterClient for virtual workspace URL")
os.Exit(1)
}
computeApiExtensionClient, err := apiextensionsclient.NewForConfig(computeKubeconfig)
if err != nil {
setupLog.Error(giterrors.WithStack(err), "error creating apiextensionsclient.ClusterClient up virtual workspace URL")
os.Exit(1)
}
setupLog.Info("server url:", "cfg.Host", cfg.Host)
mgr, err := kcp.NewClusterAwareManager(cfg, opts)
if err != nil {
setupLog.Error(giterrors.WithStack(err), "unable to start manager")
os.Exit(1)
}
setupLog.Info("server url:", "cfg.Host", cfg.Host)
// add healthz/readyz check handler
setupLog.Info("Add health check")
if err := mgr.AddHealthzCheck("healthz", healthz.Ping); err != nil {
setupLog.Error(giterrors.WithStack(err), "unable to add healthz check handler ")
os.Exit(1)
}
setupLog.Info("Add ready check")
if err := mgr.AddReadyzCheck("readyz", healthz.Ping); err != nil {
setupLog.Error(giterrors.WithStack(err), "unable to add readyz check handler ")
os.Exit(1)
}
setupLog.Info("Add RegisteredCluster reconciler")
hubInstances, err := helpers.GetHubClusters(context.Background(), mgr, kubeClient, dynamicClient)
if err != nil {
setupLog.Error(giterrors.WithStack(err), "unable to retreive the hubCluster", "controller", "Cluster Registration")
os.Exit(1)
}
if err = (&RegisteredClusterReconciler{
Client: mgr.GetClient(),
Log: ctrl.Log.WithName("controllers").WithName("RegisteredCluster"),
Scheme: scheme,
HubClusters: hubInstances,
ComputeConfig: cfg,
ComputeKubeClient: computeKubeClient,
ComputeDynamicClient: computeDynamicClient,
ComputeAPIExtensionClient: computeApiExtensionClient,
}).SetupWithManager(mgr, scheme); err != nil {
setupLog.Error(giterrors.WithStack(err), "unable to create controller", "controller", "Cluster Registration")
os.Exit(1)
}
setupLog.Info("Starting manager")
if err := mgr.Start(ctrl.SetupSignalHandler()); err != nil {
setupLog.Error(giterrors.WithStack(err), "problem running manager")
os.Exit(1)
}
}