/
main.go
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/
main.go
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// 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/clusters"
"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,
LeaderElectionID: "runtime-extension-maintenance-controller",
})
if err != nil {
setupLog.Error(err, "unable to start manager")
os.Exit(1)
}
ctx := ctrl.SetupSignalHandler()
connections := clusters.NewConnections(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
}