mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-11-13 09:50:18 +00:00
278 lines
10 KiB
Go
278 lines
10 KiB
Go
/*
|
|
Copyright 2016 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 app
|
|
|
|
import (
|
|
"fmt"
|
|
"math/rand"
|
|
"net"
|
|
"os"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/golang/glog"
|
|
"github.com/spf13/cobra"
|
|
|
|
"k8s.io/apimachinery/pkg/util/uuid"
|
|
"k8s.io/apimachinery/pkg/util/wait"
|
|
"k8s.io/client-go/informers"
|
|
"k8s.io/client-go/kubernetes"
|
|
restclient "k8s.io/client-go/rest"
|
|
"k8s.io/client-go/tools/leaderelection"
|
|
"k8s.io/client-go/tools/leaderelection/resourcelock"
|
|
cloudcontrollerconfig "k8s.io/kubernetes/cmd/cloud-controller-manager/app/config"
|
|
"k8s.io/kubernetes/cmd/cloud-controller-manager/app/options"
|
|
genericcontrollermanager "k8s.io/kubernetes/cmd/controller-manager/app"
|
|
"k8s.io/kubernetes/pkg/cloudprovider"
|
|
"k8s.io/kubernetes/pkg/controller"
|
|
cloudcontrollers "k8s.io/kubernetes/pkg/controller/cloud"
|
|
routecontroller "k8s.io/kubernetes/pkg/controller/route"
|
|
servicecontroller "k8s.io/kubernetes/pkg/controller/service"
|
|
"k8s.io/kubernetes/pkg/util/configz"
|
|
utilflag "k8s.io/kubernetes/pkg/util/flag"
|
|
"k8s.io/kubernetes/pkg/version/verflag"
|
|
)
|
|
|
|
const (
|
|
// ControllerStartJitter is the jitter value used when starting controller managers.
|
|
ControllerStartJitter = 1.0
|
|
)
|
|
|
|
// NewCloudControllerManagerCommand creates a *cobra.Command object with default parameters
|
|
func NewCloudControllerManagerCommand() *cobra.Command {
|
|
s, err := options.NewCloudControllerManagerOptions()
|
|
if err != nil {
|
|
glog.Fatalf("unable to initialize command options: %v", err)
|
|
}
|
|
|
|
cmd := &cobra.Command{
|
|
Use: "cloud-controller-manager",
|
|
Long: `The Cloud controller manager is a daemon that embeds
|
|
the cloud specific control loops shipped with Kubernetes.`,
|
|
Run: func(cmd *cobra.Command, args []string) {
|
|
verflag.PrintAndExitIfRequested()
|
|
utilflag.PrintFlags(cmd.Flags())
|
|
|
|
c, err := s.Config()
|
|
if err != nil {
|
|
fmt.Fprintf(os.Stderr, "%v\n", err)
|
|
os.Exit(1)
|
|
}
|
|
|
|
if err := Run(c.Complete()); err != nil {
|
|
fmt.Fprintf(os.Stderr, "%v\n", err)
|
|
os.Exit(1)
|
|
}
|
|
|
|
},
|
|
}
|
|
s.AddFlags(cmd.Flags())
|
|
|
|
return cmd
|
|
}
|
|
|
|
// resyncPeriod computes the time interval a shared informer waits before resyncing with the api server
|
|
func resyncPeriod(c *cloudcontrollerconfig.CompletedConfig) func() time.Duration {
|
|
return func() time.Duration {
|
|
factor := rand.Float64() + 1
|
|
return time.Duration(float64(c.ComponentConfig.GenericComponent.MinResyncPeriod.Nanoseconds()) * factor)
|
|
}
|
|
}
|
|
|
|
// Run runs the ExternalCMServer. This should never exit.
|
|
func Run(c *cloudcontrollerconfig.CompletedConfig) error {
|
|
cloud, err := cloudprovider.InitCloudProvider(c.ComponentConfig.CloudProvider.Name, c.ComponentConfig.CloudProvider.CloudConfigFile)
|
|
if err != nil {
|
|
glog.Fatalf("Cloud provider could not be initialized: %v", err)
|
|
}
|
|
if cloud == nil {
|
|
glog.Fatalf("cloud provider is nil")
|
|
}
|
|
|
|
if cloud.HasClusterID() == false {
|
|
if c.ComponentConfig.KubeCloudShared.AllowUntaggedCloud == true {
|
|
glog.Warning("detected a cluster without a ClusterID. A ClusterID will be required in the future. Please tag your cluster to avoid any future issues")
|
|
} else {
|
|
glog.Fatalf("no ClusterID found. A ClusterID is required for the cloud provider to function properly. This check can be bypassed by setting the allow-untagged-cloud option")
|
|
}
|
|
}
|
|
|
|
// setup /configz endpoint
|
|
if cz, err := configz.New("componentconfig"); err == nil {
|
|
cz.Set(c.ComponentConfig)
|
|
} else {
|
|
glog.Errorf("unable to register configz: %c", err)
|
|
}
|
|
|
|
// Start the controller manager HTTP server
|
|
stopCh := make(chan struct{})
|
|
if c.SecureServing != nil {
|
|
handler := genericcontrollermanager.NewBaseHandler(&c.ComponentConfig.Debugging)
|
|
handler = genericcontrollermanager.BuildHandlerChain(handler, &c.Authorization, &c.Authentication)
|
|
if err := c.SecureServing.Serve(handler, 0, stopCh); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
if c.InsecureServing != nil {
|
|
handler := genericcontrollermanager.NewBaseHandler(&c.ComponentConfig.Debugging)
|
|
handler = genericcontrollermanager.BuildHandlerChain(handler, &c.Authorization, &c.Authentication)
|
|
if err := c.InsecureServing.Serve(handler, 0, stopCh); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
run := func(stop <-chan struct{}) {
|
|
rootClientBuilder := controller.SimpleControllerClientBuilder{
|
|
ClientConfig: c.Kubeconfig,
|
|
}
|
|
var clientBuilder controller.ControllerClientBuilder
|
|
if c.ComponentConfig.KubeCloudShared.UseServiceAccountCredentials {
|
|
clientBuilder = controller.SAControllerClientBuilder{
|
|
ClientConfig: restclient.AnonymousClientConfig(c.Kubeconfig),
|
|
CoreClient: c.Client.CoreV1(),
|
|
AuthenticationClient: c.Client.AuthenticationV1(),
|
|
Namespace: "kube-system",
|
|
}
|
|
} else {
|
|
clientBuilder = rootClientBuilder
|
|
}
|
|
|
|
if err := startControllers(c, rootClientBuilder, clientBuilder, stop, cloud); err != nil {
|
|
glog.Fatalf("error running controllers: %v", err)
|
|
}
|
|
}
|
|
|
|
if !c.ComponentConfig.GenericComponent.LeaderElection.LeaderElect {
|
|
run(nil)
|
|
panic("unreachable")
|
|
}
|
|
|
|
// Identity used to distinguish between multiple cloud controller manager instances
|
|
id, err := os.Hostname()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
// add a uniquifier so that two processes on the same host don't accidentally both become active
|
|
id = id + "_" + string(uuid.NewUUID())
|
|
|
|
// Lock required for leader election
|
|
rl, err := resourcelock.New(c.ComponentConfig.GenericComponent.LeaderElection.ResourceLock,
|
|
"kube-system",
|
|
"cloud-controller-manager",
|
|
c.LeaderElectionClient.CoreV1(),
|
|
resourcelock.ResourceLockConfig{
|
|
Identity: id,
|
|
EventRecorder: c.EventRecorder,
|
|
})
|
|
if err != nil {
|
|
glog.Fatalf("error creating lock: %v", err)
|
|
}
|
|
|
|
// Try and become the leader and start cloud controller manager loops
|
|
leaderelection.RunOrDie(leaderelection.LeaderElectionConfig{
|
|
Lock: rl,
|
|
LeaseDuration: c.ComponentConfig.GenericComponent.LeaderElection.LeaseDuration.Duration,
|
|
RenewDeadline: c.ComponentConfig.GenericComponent.LeaderElection.RenewDeadline.Duration,
|
|
RetryPeriod: c.ComponentConfig.GenericComponent.LeaderElection.RetryPeriod.Duration,
|
|
Callbacks: leaderelection.LeaderCallbacks{
|
|
OnStartedLeading: run,
|
|
OnStoppedLeading: func() {
|
|
glog.Fatalf("leaderelection lost")
|
|
},
|
|
},
|
|
})
|
|
panic("unreachable")
|
|
}
|
|
|
|
// startControllers starts the cloud specific controller loops.
|
|
func startControllers(c *cloudcontrollerconfig.CompletedConfig, rootClientBuilder, clientBuilder controller.ControllerClientBuilder, stop <-chan struct{}, cloud cloudprovider.Interface) error {
|
|
// Function to build the kube client object
|
|
client := func(serviceAccountName string) kubernetes.Interface {
|
|
return clientBuilder.ClientOrDie(serviceAccountName)
|
|
}
|
|
if cloud != nil {
|
|
// Initialize the cloud provider with a reference to the clientBuilder
|
|
cloud.Initialize(clientBuilder)
|
|
}
|
|
|
|
// TODO: move this setup into Config
|
|
versionedClient := rootClientBuilder.ClientOrDie("shared-informers")
|
|
sharedInformers := informers.NewSharedInformerFactory(versionedClient, resyncPeriod(c)())
|
|
|
|
// Start the CloudNodeController
|
|
nodeController := cloudcontrollers.NewCloudNodeController(
|
|
sharedInformers.Core().V1().Nodes(),
|
|
client("cloud-node-controller"), cloud,
|
|
c.ComponentConfig.KubeCloudShared.NodeMonitorPeriod.Duration,
|
|
c.ComponentConfig.NodeStatusUpdateFrequency.Duration)
|
|
|
|
nodeController.Run(stop)
|
|
time.Sleep(wait.Jitter(c.ComponentConfig.GenericComponent.ControllerStartInterval.Duration, ControllerStartJitter))
|
|
|
|
// Start the PersistentVolumeLabelController
|
|
pvlController := cloudcontrollers.NewPersistentVolumeLabelController(client("pvl-controller"), cloud)
|
|
go pvlController.Run(5, stop)
|
|
time.Sleep(wait.Jitter(c.ComponentConfig.GenericComponent.ControllerStartInterval.Duration, ControllerStartJitter))
|
|
|
|
// Start the service controller
|
|
serviceController, err := servicecontroller.New(
|
|
cloud,
|
|
client("service-controller"),
|
|
sharedInformers.Core().V1().Services(),
|
|
sharedInformers.Core().V1().Nodes(),
|
|
c.ComponentConfig.KubeCloudShared.ClusterName,
|
|
)
|
|
if err != nil {
|
|
glog.Errorf("Failed to start service controller: %v", err)
|
|
} else {
|
|
go serviceController.Run(stop, int(c.ComponentConfig.ServiceController.ConcurrentServiceSyncs))
|
|
time.Sleep(wait.Jitter(c.ComponentConfig.GenericComponent.ControllerStartInterval.Duration, ControllerStartJitter))
|
|
}
|
|
|
|
// If CIDRs should be allocated for pods and set on the CloudProvider, then start the route controller
|
|
if c.ComponentConfig.KubeCloudShared.AllocateNodeCIDRs && c.ComponentConfig.KubeCloudShared.ConfigureCloudRoutes {
|
|
if routes, ok := cloud.Routes(); !ok {
|
|
glog.Warning("configure-cloud-routes is set, but cloud provider does not support routes. Will not configure cloud provider routes.")
|
|
} else {
|
|
var clusterCIDR *net.IPNet
|
|
if len(strings.TrimSpace(c.ComponentConfig.KubeCloudShared.ClusterCIDR)) != 0 {
|
|
_, clusterCIDR, err = net.ParseCIDR(c.ComponentConfig.KubeCloudShared.ClusterCIDR)
|
|
if err != nil {
|
|
glog.Warningf("Unsuccessful parsing of cluster CIDR %v: %v", c.ComponentConfig.KubeCloudShared.ClusterCIDR, err)
|
|
}
|
|
}
|
|
|
|
routeController := routecontroller.New(routes, client("route-controller"), sharedInformers.Core().V1().Nodes(), c.ComponentConfig.KubeCloudShared.ClusterName, clusterCIDR)
|
|
go routeController.Run(stop, c.ComponentConfig.KubeCloudShared.RouteReconciliationPeriod.Duration)
|
|
time.Sleep(wait.Jitter(c.ComponentConfig.GenericComponent.ControllerStartInterval.Duration, ControllerStartJitter))
|
|
}
|
|
} else {
|
|
glog.Infof("Will not configure cloud provider routes for allocate-node-cidrs: %v, configure-cloud-routes: %v.", c.ComponentConfig.KubeCloudShared.AllocateNodeCIDRs, c.ComponentConfig.KubeCloudShared.ConfigureCloudRoutes)
|
|
}
|
|
|
|
// 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 = genericcontrollermanager.WaitForAPIServer(versionedClient, 10*time.Second)
|
|
if err != nil {
|
|
glog.Fatalf("Failed to wait for apiserver being healthy: %v", err)
|
|
}
|
|
|
|
sharedInformers.Start(stop)
|
|
|
|
select {}
|
|
}
|