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controller_manager.go
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controller_manager.go
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package openshift_controller_manager
import (
"fmt"
"net/http"
"os"
"time"
"github.com/golang/glog"
origincontrollers "github.com/openshift/origin/pkg/cmd/openshift-controller-manager/controller"
configapi "github.com/openshift/origin/pkg/cmd/server/apis/config"
"github.com/openshift/origin/pkg/cmd/util"
"github.com/openshift/origin/pkg/cmd/util/variable"
"github.com/openshift/origin/pkg/version"
"k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/util/wait"
"k8s.io/client-go/kubernetes"
v1core "k8s.io/client-go/kubernetes/typed/core/v1"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/leaderelection"
"k8s.io/client-go/tools/leaderelection/resourcelock"
"k8s.io/client-go/tools/record"
"k8s.io/kubernetes/pkg/api/legacyscheme"
)
func RunOpenShiftControllerManager(config *configapi.OpenshiftControllerConfig, clientConfig *rest.Config) error {
util.InitLogrus()
kubeClient, err := kubernetes.NewForConfig(clientConfig)
if err != nil {
return err
}
// only serve if we have serving information.
if config.ServingInfo != nil {
glog.Infof("Starting controllers on %s (%s)", config.ServingInfo.BindAddress, version.Get().String())
if err := origincontrollers.RunControllerServer(*config.ServingInfo, kubeClient); err != nil {
return err
}
}
{
imageTemplate := variable.NewDefaultImageTemplate()
imageTemplate.Format = config.Deployer.ImageTemplateFormat.Format
imageTemplate.Latest = config.Deployer.ImageTemplateFormat.Latest
glog.Infof("DeploymentConfig controller using images from %q", imageTemplate.ExpandOrDie("<component>"))
}
{
imageTemplate := variable.NewDefaultImageTemplate()
imageTemplate.Format = config.Build.ImageTemplateFormat.Format
imageTemplate.Latest = config.Build.ImageTemplateFormat.Latest
glog.Infof("Build controller using images from %q", imageTemplate.ExpandOrDie("<component>"))
}
originControllerManager := func(stopCh <-chan struct{}) {
if err := waitForHealthyAPIServer(kubeClient.Discovery().RESTClient()); err != nil {
glog.Fatal(err)
}
controllerContext, err := origincontrollers.NewControllerContext(*config, clientConfig, stopCh)
if err != nil {
glog.Fatal(err)
}
if err := startControllers(controllerContext); err != nil {
glog.Fatal(err)
}
controllerContext.StartInformers(stopCh)
}
eventBroadcaster := record.NewBroadcaster()
eventBroadcaster.StartLogging(glog.Infof)
eventBroadcaster.StartRecordingToSink(&v1core.EventSinkImpl{Interface: kubeClient.CoreV1().Events("")})
eventRecorder := eventBroadcaster.NewRecorder(legacyscheme.Scheme, v1.EventSource{Component: "openshift-controller-manager"})
id, err := os.Hostname()
if err != nil {
return err
}
rl, err := resourcelock.New(
"configmaps",
"kube-system",
"openshift-master-controllers", // this matches what ansible used to set
kubeClient.CoreV1(),
resourcelock.ResourceLockConfig{
Identity: id,
EventRecorder: eventRecorder,
})
if err != nil {
return err
}
go leaderelection.RunOrDie(leaderelection.LeaderElectionConfig{
Lock: rl,
LeaseDuration: config.LeaderElection.LeaseDuration.Duration,
RenewDeadline: config.LeaderElection.RenewDeadline.Duration,
RetryPeriod: config.LeaderElection.RetryPeriod.Duration,
Callbacks: leaderelection.LeaderCallbacks{
OnStartedLeading: originControllerManager,
OnStoppedLeading: func() {
glog.Fatalf("leaderelection lost")
},
},
})
return nil
}
func waitForHealthyAPIServer(client rest.Interface) error {
var healthzContent string
// If apiserver is not running we should wait for some time and fail only then. This is particularly
// important when we start apiserver and controller manager at the same time.
err := wait.PollImmediate(time.Second, 5*time.Minute, func() (bool, error) {
healthStatus := 0
resp := client.Get().AbsPath("/healthz").Do().StatusCode(&healthStatus)
if healthStatus != http.StatusOK {
glog.Errorf("Server isn't healthy yet. Waiting a little while.")
return false, nil
}
content, _ := resp.Raw()
healthzContent = string(content)
return true, nil
})
if err != nil {
return fmt.Errorf("server unhealthy: %v: %v", healthzContent, err)
}
return nil
}
// startControllers launches the controllers
// allocation controller is passed in because it wants direct etcd access. Naughty.
func startControllers(controllerContext *origincontrollers.ControllerContext) error {
for controllerName, initFn := range origincontrollers.ControllerInitializers {
if !controllerContext.IsControllerEnabled(controllerName) {
glog.Warningf("%q is disabled", controllerName)
continue
}
glog.V(1).Infof("Starting %q", controllerName)
started, err := initFn(controllerContext)
if err != nil {
glog.Fatalf("Error starting %q (%v)", controllerName, err)
return err
}
if !started {
glog.Warningf("Skipping %q", controllerName)
continue
}
glog.Infof("Started %q", controllerName)
}
glog.Infof("Started Origin Controllers")
return nil
}