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main.go
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main.go
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/*
Copyright 2019 The Kubernetes Authors.
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 (
"flag"
"fmt"
"os"
"time"
bmoapis "github.com/metal3-io/baremetal-operator/pkg/apis"
"github.com/metal3-io/cluster-api-provider-baremetal/pkg/apis"
"github.com/metal3-io/cluster-api-provider-baremetal/pkg/cloud/baremetal/actuators/machine"
"github.com/metal3-io/cluster-api-provider-baremetal/pkg/controller"
"github.com/metal3-io/cluster-api-provider-baremetal/pkg/manager/wrapper"
clusterapis "github.com/openshift/cluster-api/pkg/apis"
capimachine "github.com/openshift/cluster-api/pkg/controller/machine"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/client-go/discovery"
"k8s.io/client-go/rest"
"k8s.io/klog"
"sigs.k8s.io/controller-runtime/pkg/client/config"
"sigs.k8s.io/controller-runtime/pkg/manager"
logf "sigs.k8s.io/controller-runtime/pkg/runtime/log"
"sigs.k8s.io/controller-runtime/pkg/runtime/signals"
)
func main() {
klog.InitFlags(nil)
watchNamespace := flag.String("namespace", "", "Namespace that the controller watches to reconcile machine-api objects. If unspecified, the controller watches for machine-api objects across all namespaces.")
metricsAddr := flag.String("metrics-addr", ":8080", "The address the metric endpoint binds to.")
enableLeaderElection := flag.Bool("enable-leader-election", false, "Enable leader election for controller manager. Enabling this will ensure there is only one active controller manager.")
flag.Parse()
log := logf.Log.WithName("baremetal-controller-manager")
logf.SetLogger(logf.ZapLogger(false))
entryLog := log.WithName("entrypoint")
cfg := config.GetConfigOrDie()
if cfg == nil {
panic(fmt.Errorf("GetConfigOrDie didn't die"))
}
err := waitForAPIs(cfg)
if err != nil {
entryLog.Error(err, "unable to discover required APIs")
os.Exit(1)
}
// Setup a Manager
opts := manager.Options{
MetricsBindAddress: *metricsAddr,
LeaderElection: *enableLeaderElection,
LeaderElectionID: "controller-leader-election-capbm",
}
if *watchNamespace != "" {
opts.Namespace = *watchNamespace
klog.Infof("Watching machine-api objects only in namespace %q for reconciliation.", opts.Namespace)
}
mgr, err := manager.New(cfg, opts)
if err != nil {
entryLog.Error(err, "unable to set up overall controller manager")
os.Exit(1)
}
machineActuator, err := machine.NewActuator(machine.ActuatorParams{
Client: mgr.GetClient(),
})
if err != nil {
panic(err)
}
if err := apis.AddToScheme(mgr.GetScheme()); err != nil {
panic(err)
}
if err := clusterapis.AddToScheme(mgr.GetScheme()); err != nil {
panic(err)
}
if err := bmoapis.AddToScheme(mgr.GetScheme()); err != nil {
panic(err)
}
// the manager wrapper will add an extra Watch to the controller
capimachine.AddWithActuator(wrapper.New(mgr), machineActuator)
if err := controller.AddToManager(mgr); err != nil {
log.Error(err, "Failed to add controller to manager")
os.Exit(1)
}
if err := mgr.Start(signals.SetupSignalHandler()); err != nil {
entryLog.Error(err, "unable to run manager")
os.Exit(1)
}
}
func waitForAPIs(cfg *rest.Config) error {
log := logf.Log.WithName("baremetal-controller-manager")
c, err := discovery.NewDiscoveryClientForConfig(cfg)
if err != nil {
return err
}
metal3GV := schema.GroupVersion{
Group: "metal3.io",
Version: "v1alpha1",
}
for {
err = discovery.ServerSupportsVersion(c, metal3GV)
if err != nil {
log.Info(fmt.Sprintf("Waiting for API group %v to be available: %v", metal3GV, err))
time.Sleep(time.Second * 10)
continue
}
log.Info(fmt.Sprintf("Found API group %v", metal3GV))
break
}
return nil
}