func (s *KubeletExecutorServer) runKubelet(execUpdates <-chan kubetypes.PodUpdate, nodeInfos <-chan executor.NodeInfo, kubeletDone chan<- struct{},
staticPodsConfigPath string, apiclient *client.Client) error {
kcfg, err := s.UnsecuredKubeletConfig()
if err == nil {
// apply Messo specific settings
executorDone := make(chan struct{})
kcfg.Builder = func(kc *app.KubeletConfig) (app.KubeletBootstrap, *kconfig.PodConfig, error) {
k, pc, err := app.CreateAndInitKubelet(kc)
if err != nil {
return k, pc, err
}
klet := k.(*kubelet.Kubelet)
s.kletLock.Lock()
s.klet = klet
s.kletLock.Unlock()
// decorate kubelet such that it shuts down when the executor is
decorated := &executorKubelet{
Kubelet: klet,
kubeletDone: kubeletDone,
executorDone: executorDone,
}
return decorated, pc, nil
}
kcfg.DockerDaemonContainer = "" // don't move the docker daemon into a cgroup
kcfg.Hostname = kcfg.HostnameOverride
kcfg.KubeClient = apiclient
kcfg.NodeName = kcfg.HostnameOverride
kcfg.PodConfig = kconfig.NewPodConfig(kconfig.PodConfigNotificationIncremental, kcfg.Recorder) // override the default pod source
kcfg.StandaloneMode = false
kcfg.SystemContainer = "" // don't take control over other system processes.
if kcfg.Cloud != nil {
// fail early and hard because having the cloud provider loaded would go unnoticed,
// but break bigger cluster because accessing the state.json from every slave kills the master.
panic("cloud provider must not be set")
}
// create custom cAdvisor interface which return the resource values that Mesos reports
ni := <-nodeInfos
cAdvisorInterface, err := NewMesosCadvisor(ni.Cores, ni.Mem, s.CAdvisorPort)
if err != nil {
return err
}
kcfg.CAdvisorInterface = cAdvisorInterface
go func() {
for ni := range nodeInfos {
// TODO(sttts): implement with MachineAllocable mechanism when https://github.com/kubernetes/kubernetes/issues/13984 is finished
log.V(3).Infof("ignoring updated node resources: %v", ni)
}
}()
// create main pod source
updates := kcfg.PodConfig.Channel(MESOS_CFG_SOURCE)
go func() {
// execUpdates will be closed by the executor on shutdown
defer close(executorDone)
for u := range execUpdates {
u.Source = MESOS_CFG_SOURCE
updates <- u
}
}()
// create static-pods directory file source
log.V(2).Infof("initializing static pods source factory, configured at path %q", staticPodsConfigPath)
fileSourceUpdates := kcfg.PodConfig.Channel(kubetypes.FileSource)
kconfig.NewSourceFile(staticPodsConfigPath, kcfg.HostnameOverride, kcfg.FileCheckFrequency, fileSourceUpdates)
// run the kubelet, until execUpdates is closed
// NOTE: because kcfg != nil holds, the upstream Run function will not
// initialize the cloud provider. We explicitly wouldn't want
// that because then every kubelet instance would query the master
// state.json which does not scale.
err = s.KubeletServer.Run(kcfg)
}
if err != nil {
// close the channel here. When Run returns without error, the executorKubelet is
// responsible to do this. If it returns with an error, we are responsible here.
close(kubeletDone)
}
return err
}
func (s *KubeletExecutorServer) runKubelet(
nodeInfos <-chan executor.NodeInfo,
kubeletDone chan<- struct{},
staticPodsConfigPath string,
apiclient *clientset.Clientset,
podLW *cache.ListWatch,
registry executor.Registry,
executorDone <-chan struct{},
) (err error) {
defer func() {
if err != nil {
// close the channel here. When Run returns without error, the executorKubelet is
// responsible to do this. If it returns with an error, we are responsible here.
close(kubeletDone)
}
}()
kcfg, err := kubeletapp.UnsecuredKubeletConfig(s.KubeletServer)
if err != nil {
return err
}
// apply Mesos specific settings
kcfg.Builder = func(kc *kubeletapp.KubeletConfig) (kubeletapp.KubeletBootstrap, *kconfig.PodConfig, error) {
k, pc, err := kubeletapp.CreateAndInitKubelet(kc)
if err != nil {
return k, pc, err
}
// decorate kubelet such that it shuts down when the executor is
decorated := &executorKubelet{
Kubelet: k.(*kubelet.Kubelet),
kubeletDone: kubeletDone,
executorDone: executorDone,
}
return decorated, pc, nil
}
kcfg.DockerDaemonContainer = "" // don't move the docker daemon into a cgroup
kcfg.Hostname = kcfg.HostnameOverride
kcfg.KubeClient = apiclient
// taken from KubeletServer#Run(*KubeletConfig)
eventClientConfig, err := kubeletapp.CreateAPIServerClientConfig(s.KubeletServer)
if err != nil {
return err
}
// make a separate client for events
eventClientConfig.QPS = s.EventRecordQPS
eventClientConfig.Burst = s.EventBurst
kcfg.EventClient, err = clientset.NewForConfig(eventClientConfig)
if err != nil {
return err
}
kcfg.NodeName = kcfg.HostnameOverride
kcfg.PodConfig = kconfig.NewPodConfig(kconfig.PodConfigNotificationIncremental, kcfg.Recorder) // override the default pod source
kcfg.StandaloneMode = false
kcfg.SystemContainer = "" // don't take control over other system processes.
if kcfg.Cloud != nil {
// fail early and hard because having the cloud provider loaded would go unnoticed,
// but break bigger cluster because accessing the state.json from every slave kills the master.
panic("cloud provider must not be set")
}
// create custom cAdvisor interface which return the resource values that Mesos reports
ni := <-nodeInfos
cAdvisorInterface, err := NewMesosCadvisor(ni.Cores, ni.Mem, s.CAdvisorPort)
if err != nil {
return err
}
kcfg.CAdvisorInterface = cAdvisorInterface
kcfg.ContainerManager, err = cm.NewContainerManager(kcfg.Mounter, cAdvisorInterface)
if err != nil {
return err
}
go func() {
for ni := range nodeInfos {
// TODO(sttts): implement with MachineAllocable mechanism when https://github.com/kubernetes/kubernetes/issues/13984 is finished
log.V(3).Infof("ignoring updated node resources: %v", ni)
}
}()
// create main pod source, it will stop generating events once executorDone is closed
newSourceMesos(executorDone, kcfg.PodConfig.Channel(mesosSource), podLW, registry)
// create static-pods directory file source
log.V(2).Infof("initializing static pods source factory, configured at path %q", staticPodsConfigPath)
fileSourceUpdates := kcfg.PodConfig.Channel(kubetypes.FileSource)
kconfig.NewSourceFile(staticPodsConfigPath, kcfg.HostnameOverride, kcfg.FileCheckFrequency, fileSourceUpdates)
// run the kubelet
// NOTE: because kcfg != nil holds, the upstream Run function will not
// initialize the cloud provider. We explicitly wouldn't want
// that because then every kubelet instance would query the master
// state.json which does not scale.
err = kubeletapp.Run(s.KubeletServer, kcfg)
return
}
func (s *KubeletExecutorServer) runKubelet(
nodeInfos <-chan executor.NodeInfo,
kubeletDone chan<- struct{},
staticPodsConfigPath string,
apiclient *clientset.Clientset,
podLW *cache.ListWatch,
registry executor.Registry,
executorDone <-chan struct{},
) (err error) {
defer func() {
if err != nil {
// close the channel here. When Run returns without error, the executorKubelet is
// responsible to do this. If it returns with an error, we are responsible here.
close(kubeletDone)
}
}()
kubeDeps, err := kubeletapp.UnsecuredKubeletDeps(s.KubeletServer)
if err != nil {
return err
}
// apply Mesos specific settings
kubeDeps.Builder = func(kubeCfg *componentconfig.KubeletConfiguration, kubeDeps *kubelet.KubeletDeps, standaloneMode bool) (kubelet.KubeletBootstrap, error) {
k, err := kubeletapp.CreateAndInitKubelet(kubeCfg, kubeDeps, standaloneMode)
if err != nil {
return k, err
}
// decorate kubelet such that it shuts down when the executor is
decorated := &executorKubelet{
Kubelet: k.(*kubelet.Kubelet),
kubeletDone: kubeletDone,
executorDone: executorDone,
}
return decorated, nil
}
s.RuntimeCgroups = "" // don't move the docker daemon into a cgroup
kubeDeps.KubeClient = apiclient
// taken from KubeletServer#Run(*KubeletConfig)
eventClientConfig, err := kubeletapp.CreateAPIServerClientConfig(s.KubeletServer)
if err != nil {
return err
}
// make a separate client for events
eventClientConfig.QPS = float32(s.EventRecordQPS)
eventClientConfig.Burst = int(s.EventBurst)
kubeDeps.EventClient, err = clientset.NewForConfig(eventClientConfig)
if err != nil {
return err
}
kubeDeps.PodConfig = kconfig.NewPodConfig(kconfig.PodConfigNotificationIncremental, kubeDeps.Recorder) // override the default pod source
s.SystemCgroups = "" // don't take control over other system processes.
if kubeDeps.Cloud != nil {
// fail early and hard because having the cloud provider loaded would go unnoticed,
// but break bigger cluster because accessing the state.json from every slave kills the master.
panic("cloud provider must not be set")
}
// create custom cAdvisor interface which return the resource values that Mesos reports
ni := <-nodeInfos
cAdvisorInterface, err := NewMesosCadvisor(ni.Cores, ni.Mem, uint(s.CAdvisorPort), s.ContainerRuntime)
if err != nil {
return err
}
kubeDeps.CAdvisorInterface = cAdvisorInterface
kubeDeps.ContainerManager, err = cm.NewContainerManager(kubeDeps.Mounter, cAdvisorInterface, cm.NodeConfig{
RuntimeCgroupsName: s.RuntimeCgroups,
SystemCgroupsName: s.SystemCgroups,
KubeletCgroupsName: s.KubeletCgroups,
ContainerRuntime: s.ContainerRuntime,
})
if err != nil {
return err
}
go func() {
for ni := range nodeInfos {
// TODO(sttts): implement with MachineAllocable mechanism when https://github.com/kubernetes/kubernetes/issues/13984 is finished
log.V(3).Infof("ignoring updated node resources: %v", ni)
}
}()
// create main pod source, it will stop generating events once executorDone is closed
var containerOptions []podsource.Option
if s.containerID != "" {
// tag all pod containers with the containerID so that they can be properly GC'd by Mesos
containerOptions = append(containerOptions, podsource.ContainerEnvOverlay([]api.EnvVar{
{Name: envContainerID, Value: s.containerID},
}))
kubeDeps.ContainerRuntimeOptions = append(kubeDeps.ContainerRuntimeOptions,
dockertools.PodInfraContainerEnv(map[string]string{
envContainerID: s.containerID,
}))
}
podsource.Mesos(executorDone, kubeDeps.PodConfig.Channel(podsource.MesosSource), podLW, registry, containerOptions...)
// create static-pods directory file source
log.V(2).Infof("initializing static pods source factory, configured at path %q", staticPodsConfigPath)
fileSourceUpdates := kubeDeps.PodConfig.Channel(kubetypes.FileSource)
kconfig.NewSourceFile(staticPodsConfigPath, s.HostnameOverride, s.FileCheckFrequency.Duration, fileSourceUpdates)
// run the kubelet
// NOTE: because kubeDeps != nil holds, the upstream Run function will not
// initialize the cloud provider. We explicitly wouldn't want
// that because then every kubelet instance would query the master
// state.json which does not scale.
s.KubeletServer.LockFilePath = "" // disable lock file
err = kubeletapp.Run(s.KubeletServer, kubeDeps)
return
}