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Add support for expiring workload cluster kubeconfigs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,104 @@ | ||
| // Copyright 2024 SAP SE | ||
| // | ||
| // 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 ( | ||
| "context" | ||
| "flag" | ||
| "os" | ||
|
|
||
| "github.com/sapcc/runtime-extension-maintenance-controller/management" | ||
| "github.com/sapcc/runtime-extension-maintenance-controller/workload" | ||
| "go.uber.org/zap/zapcore" | ||
| "k8s.io/apimachinery/pkg/runtime" | ||
|
|
||
| utilruntime "k8s.io/apimachinery/pkg/util/runtime" | ||
| clientgoscheme "k8s.io/client-go/kubernetes/scheme" | ||
| "k8s.io/client-go/rest" | ||
| clusterv1beta1 "sigs.k8s.io/cluster-api/api/v1beta1" | ||
| ctrl "sigs.k8s.io/controller-runtime" | ||
| ctrlconfig "sigs.k8s.io/controller-runtime/pkg/client/config" | ||
| "sigs.k8s.io/controller-runtime/pkg/log/zap" | ||
| ) | ||
|
|
||
| var ( | ||
| scheme = runtime.NewScheme() | ||
| setupLog = ctrl.Log.WithName("setup") | ||
| ) | ||
|
|
||
| func init() { | ||
| utilruntime.Must(clientgoscheme.AddToScheme(scheme)) | ||
| utilruntime.Must(clusterv1beta1.AddToScheme(scheme)) | ||
| } | ||
|
|
||
| func main() { | ||
| var kubecontext string | ||
| opts := zap.Options{ | ||
| Development: true, | ||
| TimeEncoder: zapcore.ISO8601TimeEncoder, | ||
| } | ||
| flag.StringVar(&kubecontext, "kubecontext", "", "The context to use from the kubeconfig (defaults to current-context)") | ||
| opts.BindFlags(flag.CommandLine) | ||
| flag.Parse() | ||
|
|
||
| ctrl.SetLogger(zap.New(zap.UseFlagOptions(&opts))) | ||
| restConfig := getKubeconfigOrDie(kubecontext) | ||
| setupLog.Info("loaded kubeconfig", "context", kubecontext, "host", restConfig.Host) | ||
|
|
||
| mgr, err := ctrl.NewManager(restConfig, ctrl.Options{ | ||
| Scheme: scheme, | ||
| LeaderElection: true, | ||
| }) | ||
| if err != nil { | ||
| setupLog.Error(err, "unable to start manager") | ||
| os.Exit(1) | ||
| } | ||
|
|
||
| ctx := ctrl.SetupSignalHandler() | ||
| connections := workload.NewClusterConnections(mgr.GetClient(), func() context.Context { return ctx }) | ||
| err = (&management.MachineReconciler{ | ||
| Client: mgr.GetClient(), | ||
| Log: ctrl.Log.WithName("management"), | ||
| WorkloadNodeControllers: map[string]*workload.NodeController{}, | ||
| CancelFuncs: map[string]context.CancelFunc{}, | ||
| WorkloadContextFunc: func() context.Context { | ||
| return ctx | ||
| }, | ||
| ClusterConnections: connections, | ||
| }).SetupWithManager(mgr) | ||
| if err != nil { | ||
| setupLog.Error(err, "unable to create machine controller") | ||
| os.Exit(1) | ||
| } | ||
|
|
||
| setupLog.Info("starting manager") | ||
| if err := mgr.Start(ctx); err != nil { | ||
| setupLog.Error(err, "problem running manager") | ||
| os.Exit(1) | ||
| } | ||
| setupLog.Info("received SIGTERM or SIGINT. See you later.") | ||
| } | ||
|
|
||
| func getKubeconfigOrDie(kubecontext string) *rest.Config { | ||
| if kubecontext == "" { | ||
| kubecontext = os.Getenv("KUBECONTEXT") | ||
| } | ||
| restConfig, err := ctrlconfig.GetConfigWithContext(kubecontext) | ||
| if err != nil { | ||
| setupLog.Error(err, "Failed to load kubeconfig") | ||
| os.Exit(1) | ||
| } | ||
| return restConfig | ||
| } |
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