// Run runs the specified KubeletServer. This should never exit.
func (s *KubeletServer) Run(_ []string) error {
util.ReallyCrash = s.ReallyCrashForTesting
rand.Seed(time.Now().UTC().UnixNano())
// TODO(vmarmol): Do this through container config.
if err := util.ApplyOomScoreAdj(0, s.OOMScoreAdj); err != nil {
glog.Warning(err)
}
var apiclient *client.Client
clientConfig, err := s.CreateAPIServerClientConfig()
if err == nil {
apiclient, err = client.New(clientConfig)
}
if err != nil && len(s.APIServerList) > 0 {
glog.Warningf("No API client: %v", err)
}
glog.V(2).Infof("Using root directory: %v", s.RootDirectory)
credentialprovider.SetPreferredDockercfgPath(s.RootDirectory)
cadvisorInterface, err := cadvisor.New(s.CadvisorPort)
if err != nil {
return err
}
imageGCPolicy := kubelet.ImageGCPolicy{
HighThresholdPercent: s.ImageGCHighThresholdPercent,
LowThresholdPercent: s.ImageGCLowThresholdPercent,
}
diskSpacePolicy := kubelet.DiskSpacePolicy{
DockerFreeDiskMB: s.LowDiskSpaceThresholdMB,
RootFreeDiskMB: s.LowDiskSpaceThresholdMB,
}
cloud := cloudprovider.InitCloudProvider(s.CloudProvider, s.CloudConfigFile)
glog.V(2).Infof("Successfully initialized cloud provider: %q from the config file: %q\n", s.CloudProvider, s.CloudConfigFile)
hostNetworkSources, err := kubelet.GetValidatedSources(strings.Split(s.HostNetworkSources, ","))
if err != nil {
return err
}
tlsOptions, err := s.InitializeTLS()
if err != nil {
return err
}
mounter := mount.New()
if s.Containerized {
glog.V(2).Info("Running kubelet in containerized mode (experimental)")
mounter = &mount.NsenterMounter{}
}
var dockerExecHandler dockertools.ExecHandler
switch s.DockerExecHandlerName {
case "native":
dockerExecHandler = &dockertools.NativeExecHandler{}
case "nsenter":
dockerExecHandler = &dockertools.NsenterExecHandler{}
default:
glog.Warningf("Unknown Docker exec handler %q; defaulting to native", s.DockerExecHandlerName)
dockerExecHandler = &dockertools.NativeExecHandler{}
}
kcfg := KubeletConfig{
Address: s.Address,
AllowPrivileged: s.AllowPrivileged,
HostNetworkSources: hostNetworkSources,
HostnameOverride: s.HostnameOverride,
RootDirectory: s.RootDirectory,
ConfigFile: s.Config,
ManifestURL: s.ManifestURL,
FileCheckFrequency: s.FileCheckFrequency,
HTTPCheckFrequency: s.HTTPCheckFrequency,
PodInfraContainerImage: s.PodInfraContainerImage,
SyncFrequency: s.SyncFrequency,
RegistryPullQPS: s.RegistryPullQPS,
RegistryBurst: s.RegistryBurst,
MinimumGCAge: s.MinimumGCAge,
MaxPerPodContainerCount: s.MaxPerPodContainerCount,
MaxContainerCount: s.MaxContainerCount,
RegisterNode: s.RegisterNode,
StandaloneMode: (len(s.APIServerList) == 0),
ClusterDomain: s.ClusterDomain,
ClusterDNS: s.ClusterDNS,
Runonce: s.RunOnce,
Port: s.Port,
ReadOnlyPort: s.ReadOnlyPort,
CadvisorInterface: cadvisorInterface,
EnableServer: s.EnableServer,
EnableDebuggingHandlers: s.EnableDebuggingHandlers,
DockerClient: dockertools.ConnectToDockerOrDie(s.DockerEndpoint),
KubeClient: apiclient,
MasterServiceNamespace: s.MasterServiceNamespace,
VolumePlugins: ProbeVolumePlugins(),
NetworkPlugins: ProbeNetworkPlugins(),
NetworkPluginName: s.NetworkPluginName,
StreamingConnectionIdleTimeout: s.StreamingConnectionIdleTimeout,
TLSOptions: tlsOptions,
ImageGCPolicy: imageGCPolicy,
DiskSpacePolicy: diskSpacePolicy,
Cloud: cloud,
NodeStatusUpdateFrequency: s.NodeStatusUpdateFrequency,
ResourceContainer: s.ResourceContainer,
CgroupRoot: s.CgroupRoot,
ContainerRuntime: s.ContainerRuntime,
Mounter: mounter,
DockerDaemonContainer: s.DockerDaemonContainer,
SystemContainer: s.SystemContainer,
ConfigureCBR0: s.ConfigureCBR0,
PodCIDR: s.PodCIDR,
MaxPods: s.MaxPods,
DockerExecHandler: dockerExecHandler,
}
if err := RunKubelet(&kcfg, nil); err != nil {
return err
}
if s.HealthzPort > 0 {
healthz.DefaultHealthz()
go util.Forever(func() {
err := http.ListenAndServe(net.JoinHostPort(s.HealthzBindAddress.String(), strconv.Itoa(s.HealthzPort)), nil)
if err != nil {
glog.Errorf("Starting health server failed: %v", err)
}
}, 5*time.Second)
}
if s.RunOnce {
return nil
}
// run forever
select {}
}
// KubeletConfig generates the appropriate Kubelet config for the given server arguments, or returns an
// error.
func (s *KubeletServer) KubeletConfig() (*KubeletConfig, error) {
hostNetworkSources, err := kubelet.GetValidatedSources(strings.Split(s.HostNetworkSources, ","))
if err != nil {
return nil, err
}
mounter := mount.New()
if s.Containerized {
glog.V(2).Info("Running kubelet in containerized mode (experimental)")
mounter = mount.NewNsenterMounter()
}
imageGCPolicy := kubelet.ImageGCPolicy{
HighThresholdPercent: s.ImageGCHighThresholdPercent,
LowThresholdPercent: s.ImageGCLowThresholdPercent,
}
diskSpacePolicy := kubelet.DiskSpacePolicy{
DockerFreeDiskMB: s.LowDiskSpaceThresholdMB,
RootFreeDiskMB: s.LowDiskSpaceThresholdMB,
}
var dockerExecHandler dockertools.ExecHandler
switch s.DockerExecHandler {
case "native":
dockerExecHandler = &dockertools.NativeExecHandler{}
case "nsenter":
dockerExecHandler = &dockertools.NsenterExecHandler{}
default:
glog.Warningf("Unknown Docker exec handler %q; defaulting to native", s.DockerExecHandler)
dockerExecHandler = &dockertools.NativeExecHandler{}
}
if s.TLSCertFile == "" && s.TLSPrivateKeyFile == "" {
s.TLSCertFile = path.Join(s.CertDirectory, "kubelet.crt")
s.TLSPrivateKeyFile = path.Join(s.CertDirectory, "kubelet.key")
if err := util.GenerateSelfSignedCert(util.GetHostname(s.HostnameOverride), s.TLSCertFile, s.TLSPrivateKeyFile); err != nil {
return nil, fmt.Errorf("unable to generate self signed cert: %v", err)
}
glog.V(4).Infof("Using self-signed cert (%s, %s)", s.TLSCertFile, s.TLSPrivateKeyFile)
}
tlsOptions := &kubelet.TLSOptions{
Config: &tls.Config{
// Change default from SSLv3 to TLSv1.0 (because of POODLE vulnerability).
MinVersion: tls.VersionTLS10,
// Populate PeerCertificates in requests, but don't yet reject connections without certificates.
ClientAuth: tls.RequestClientCert,
},
CertFile: s.TLSCertFile,
KeyFile: s.TLSPrivateKeyFile,
}
return &KubeletConfig{
Address: s.Address,
AllowPrivileged: s.AllowPrivileged,
HostNetworkSources: hostNetworkSources,
HostnameOverride: s.HostnameOverride,
RootDirectory: s.RootDirectory,
ConfigFile: s.Config,
ManifestURL: s.ManifestURL,
FileCheckFrequency: s.FileCheckFrequency,
HTTPCheckFrequency: s.HTTPCheckFrequency,
PodInfraContainerImage: s.PodInfraContainerImage,
SyncFrequency: s.SyncFrequency,
RegistryPullQPS: s.RegistryPullQPS,
RegistryBurst: s.RegistryBurst,
MinimumGCAge: s.MinimumGCAge,
MaxPerPodContainerCount: s.MaxPerPodContainerCount,
MaxContainerCount: s.MaxContainerCount,
RegisterNode: s.RegisterNode,
ClusterDomain: s.ClusterDomain,
ClusterDNS: s.ClusterDNS,
Runonce: s.RunOnce,
Port: s.Port,
ReadOnlyPort: s.ReadOnlyPort,
EnableServer: s.EnableServer,
EnableDebuggingHandlers: s.EnableDebuggingHandlers,
MasterServiceNamespace: s.MasterServiceNamespace,
VolumePlugins: ProbeVolumePlugins(),
NetworkPlugins: ProbeNetworkPlugins(),
NetworkPluginName: s.NetworkPluginName,
StreamingConnectionIdleTimeout: s.StreamingConnectionIdleTimeout,
TLSOptions: tlsOptions,
ImageGCPolicy: imageGCPolicy,
DiskSpacePolicy: diskSpacePolicy,
NodeStatusUpdateFrequency: s.NodeStatusUpdateFrequency,
ResourceContainer: s.ResourceContainer,
CgroupRoot: s.CgroupRoot,
ContainerRuntime: s.ContainerRuntime,
Mounter: mounter,
DockerDaemonContainer: s.DockerDaemonContainer,
ConfigureCBR0: s.ConfigureCBR0,
MaxPods: s.MaxPods,
DockerExecHandler: dockerExecHandler,
}, nil
}
// Run runs the specified KubeletExecutorServer.
func (s *KubeletExecutorServer) Run(hks hyperkube.Interface, _ []string) error {
rand.Seed(time.Now().UTC().UnixNano())
if err := util.ApplyOomScoreAdj(0, s.OOMScoreAdj); err != nil {
log.Info(err)
}
// derive the executor cgroup and use it as docker cgroup root
mesosCgroup := findMesosCgroup(s.cgroupPrefix)
s.cgroupRoot = mesosCgroup
s.SystemContainer = mesosCgroup
s.ResourceContainer = mesosCgroup
log.V(2).Infof("passing cgroup %q to the kubelet as cgroup root", s.CgroupRoot)
// create apiserver client
var apiclient *client.Client
clientConfig, err := s.CreateAPIServerClientConfig()
if err == nil {
apiclient, err = client.New(clientConfig)
}
if err != nil {
// required for k8sm since we need to send api.Binding information
// back to the apiserver
log.Fatalf("No API client: %v", err)
}
log.Infof("Using root directory: %v", s.RootDirectory)
credentialprovider.SetPreferredDockercfgPath(s.RootDirectory)
shutdownCloser, err := s.syncExternalShutdownWatcher()
if err != nil {
return err
}
cadvisorInterface, err := cadvisor.New(s.CadvisorPort)
if err != nil {
return err
}
imageGCPolicy := kubelet.ImageGCPolicy{
HighThresholdPercent: s.ImageGCHighThresholdPercent,
LowThresholdPercent: s.ImageGCLowThresholdPercent,
}
diskSpacePolicy := kubelet.DiskSpacePolicy{
DockerFreeDiskMB: s.LowDiskSpaceThresholdMB,
RootFreeDiskMB: s.LowDiskSpaceThresholdMB,
}
//TODO(jdef) intentionally NOT initializing a cloud provider here since:
//(a) the kubelet doesn't actually use it
//(b) we don't need to create N-kubelet connections to zookeeper for no good reason
//cloud := cloudprovider.InitCloudProvider(s.CloudProvider, s.CloudConfigFile)
//log.Infof("Successfully initialized cloud provider: %q from the config file: %q\n", s.CloudProvider, s.CloudConfigFile)
hostNetworkSources, err := kubelet.GetValidatedSources(strings.Split(s.HostNetworkSources, ","))
if err != nil {
return err
}
tlsOptions, err := s.InitializeTLS()
if err != nil {
return err
}
mounter := mount.New()
if s.Containerized {
log.V(2).Info("Running kubelet in containerized mode (experimental)")
mounter = &mount.NsenterMounter{}
}
var dockerExecHandler dockertools.ExecHandler
switch s.DockerExecHandlerName {
case "native":
dockerExecHandler = &dockertools.NativeExecHandler{}
case "nsenter":
dockerExecHandler = &dockertools.NsenterExecHandler{}
default:
log.Warningf("Unknown Docker exec handler %q; defaulting to native", s.DockerExecHandlerName)
dockerExecHandler = &dockertools.NativeExecHandler{}
}
kcfg := app.KubeletConfig{
Address: s.Address,
AllowPrivileged: s.AllowPrivileged,
HostNetworkSources: hostNetworkSources,
HostnameOverride: s.HostnameOverride,
RootDirectory: s.RootDirectory,
// ConfigFile: ""
// ManifestURL: ""
FileCheckFrequency: s.FileCheckFrequency,
// HTTPCheckFrequency
PodInfraContainerImage: s.PodInfraContainerImage,
SyncFrequency: s.SyncFrequency,
RegistryPullQPS: s.RegistryPullQPS,
RegistryBurst: s.RegistryBurst,
MinimumGCAge: s.MinimumGCAge,
MaxPerPodContainerCount: s.MaxPerPodContainerCount,
MaxContainerCount: s.MaxContainerCount,
RegisterNode: s.RegisterNode,
// StandaloneMode: false
ClusterDomain: s.ClusterDomain,
ClusterDNS: s.ClusterDNS,
Runonce: s.RunOnce,
Port: s.Port,
ReadOnlyPort: s.ReadOnlyPort,
CadvisorInterface: cadvisorInterface,
EnableServer: s.EnableServer,
EnableDebuggingHandlers: s.EnableDebuggingHandlers,
DockerClient: dockertools.ConnectToDockerOrDie(s.DockerEndpoint),
KubeClient: apiclient,
MasterServiceNamespace: s.MasterServiceNamespace,
VolumePlugins: app.ProbeVolumePlugins(),
NetworkPlugins: app.ProbeNetworkPlugins(s.NetworkPluginDir),
NetworkPluginName: s.NetworkPluginName,
StreamingConnectionIdleTimeout: s.StreamingConnectionIdleTimeout,
TLSOptions: tlsOptions,
ImageGCPolicy: imageGCPolicy,
DiskSpacePolicy: diskSpacePolicy,
Cloud: nil, // TODO(jdef) Cloud, specifying null here because we don't want all kubelets polling mesos-master; need to account for this in the cloudprovider impl
NodeStatusUpdateFrequency: s.NodeStatusUpdateFrequency,
ResourceContainer: s.ResourceContainer,
CgroupRoot: s.cgroupRoot,
ContainerRuntime: s.ContainerRuntime,
Mounter: mounter,
DockerDaemonContainer: s.DockerDaemonContainer,
SystemContainer: s.SystemContainer,
ConfigureCBR0: s.ConfigureCBR0,
MaxPods: s.MaxPods,
DockerExecHandler: dockerExecHandler,
}
kcfg.NodeName = kcfg.Hostname
err = app.RunKubelet(&kcfg, app.KubeletBuilder(func(kc *app.KubeletConfig) (app.KubeletBootstrap, *kconfig.PodConfig, error) {
return s.createAndInitKubelet(kc, hks, clientConfig, shutdownCloser)
}))
if err != nil {
return err
}
if s.HealthzPort > 0 {
healthz.DefaultHealthz()
go util.Forever(func() {
err := http.ListenAndServe(net.JoinHostPort(s.HealthzBindAddress.String(), strconv.Itoa(s.HealthzPort)), nil)
if err != nil {
log.Errorf("Starting health server failed: %v", err)
}
}, 5*time.Second)
}
// block until executor is shut down or commits shutdown
select {}
}
// Run runs the specified KubeletServer. This should never exit.
func (s *KubeletServer) Run(_ []string) error {
util.ReallyCrash = s.ReallyCrashForTesting
rand.Seed(time.Now().UTC().UnixNano())
// TODO(vmarmol): Do this through container config.
if err := util.ApplyOomScoreAdj(0, s.OOMScoreAdj); err != nil {
glog.Info(err)
}
client, err := s.createAPIServerClient()
if err != nil && len(s.APIServerList) > 0 {
glog.Warningf("No API client: %v", err)
}
glog.Infof("Using root directory: %v", s.RootDirectory)
credentialprovider.SetPreferredDockercfgPath(s.RootDirectory)
cadvisorInterface, err := cadvisor.New(s.CadvisorPort)
if err != nil {
return err
}
imageGCPolicy := kubelet.ImageGCPolicy{
HighThresholdPercent: s.ImageGCHighThresholdPercent,
LowThresholdPercent: s.ImageGCLowThresholdPercent,
}
cloud := cloudprovider.InitCloudProvider(s.CloudProvider, s.CloudConfigFile)
glog.Infof("Successfully initialized cloud provider: %q from the config file: %q\n", s.CloudProvider, s.CloudConfigFile)
hostNetworkSources, err := kubelet.GetValidatedSources(strings.Split(s.HostNetworkSources, ","))
if err != nil {
return err
}
if s.TLSCertFile == "" && s.TLSPrivateKeyFile == "" {
s.TLSCertFile = path.Join(s.CertDirectory, "kubelet.crt")
s.TLSPrivateKeyFile = path.Join(s.CertDirectory, "kubelet.key")
if err := util.GenerateSelfSignedCert(util.GetHostname(s.HostnameOverride), s.TLSCertFile, s.TLSPrivateKeyFile); err != nil {
glog.Fatalf("Unable to generate self signed cert: %v", err)
}
glog.Infof("Using self-signed cert (%s, %s)", s.TLSCertFile, s.TLSPrivateKeyFile)
}
tlsOptions := &kubelet.TLSOptions{
Config: &tls.Config{
// Change default from SSLv3 to TLSv1.0 (because of POODLE vulnerability).
MinVersion: tls.VersionTLS10,
// Populate PeerCertificates in requests, but don't yet reject connections without certificates.
ClientAuth: tls.RequestClientCert,
},
CertFile: s.TLSCertFile,
KeyFile: s.TLSPrivateKeyFile,
}
kcfg := KubeletConfig{
Address: s.Address,
AllowPrivileged: s.AllowPrivileged,
HostNetworkSources: hostNetworkSources,
HostnameOverride: s.HostnameOverride,
RootDirectory: s.RootDirectory,
ConfigFile: s.Config,
ManifestURL: s.ManifestURL,
FileCheckFrequency: s.FileCheckFrequency,
HTTPCheckFrequency: s.HTTPCheckFrequency,
PodInfraContainerImage: s.PodInfraContainerImage,
SyncFrequency: s.SyncFrequency,
RegistryPullQPS: s.RegistryPullQPS,
RegistryBurst: s.RegistryBurst,
MinimumGCAge: s.MinimumGCAge,
MaxPerPodContainerCount: s.MaxPerPodContainerCount,
MaxContainerCount: s.MaxContainerCount,
ClusterDomain: s.ClusterDomain,
ClusterDNS: s.ClusterDNS,
Runonce: s.RunOnce,
Port: s.Port,
ReadOnlyPort: s.ReadOnlyPort,
CadvisorInterface: cadvisorInterface,
EnableServer: s.EnableServer,
EnableDebuggingHandlers: s.EnableDebuggingHandlers,
DockerClient: dockertools.ConnectToDockerOrDie(s.DockerEndpoint),
KubeClient: client,
MasterServiceNamespace: s.MasterServiceNamespace,
VolumePlugins: ProbeVolumePlugins(),
NetworkPlugins: ProbeNetworkPlugins(),
NetworkPluginName: s.NetworkPluginName,
StreamingConnectionIdleTimeout: s.StreamingConnectionIdleTimeout,
TLSOptions: tlsOptions,
ImageGCPolicy: imageGCPolicy,
Cloud: cloud,
NodeStatusUpdateFrequency: s.NodeStatusUpdateFrequency,
ResourceContainer: s.ResourceContainer,
}
RunKubelet(&kcfg, nil)
if s.HealthzPort > 0 {
healthz.DefaultHealthz()
go util.Forever(func() {
err := http.ListenAndServe(net.JoinHostPort(s.HealthzBindAddress.String(), strconv.Itoa(s.HealthzPort)), nil)
if err != nil {
glog.Errorf("Starting health server failed: %v", err)
}
}, 5*time.Second)
}
// runs forever
select {}
}
// KubeletConfig returns a KubeletConfig suitable for being run, or an error if the server setup
// is not valid. It will not start any background processes.
func (s *KubeletServer) KubeletConfig() (*KubeletConfig, error) {
hostNetworkSources, err := kubelet.GetValidatedSources(strings.Split(s.HostNetworkSources, ","))
if err != nil {
return nil, err
}
mounter := mount.New()
if s.Containerized {
glog.V(2).Info("Running kubelet in containerized mode (experimental)")
mounter = mount.NewNsenterMounter()
}
tlsOptions, err := s.InitializeTLS()
if err != nil {
return nil, err
}
var dockerExecHandler dockertools.ExecHandler
switch s.DockerExecHandlerName {
case "native":
dockerExecHandler = &dockertools.NativeExecHandler{}
case "nsenter":
dockerExecHandler = &dockertools.NsenterExecHandler{}
default:
glog.Warningf("Unknown Docker exec handler %q; defaulting to native", s.DockerExecHandlerName)
dockerExecHandler = &dockertools.NativeExecHandler{}
}
imageGCPolicy := kubelet.ImageGCPolicy{
HighThresholdPercent: s.ImageGCHighThresholdPercent,
LowThresholdPercent: s.ImageGCLowThresholdPercent,
}
diskSpacePolicy := kubelet.DiskSpacePolicy{
DockerFreeDiskMB: s.LowDiskSpaceThresholdMB,
RootFreeDiskMB: s.LowDiskSpaceThresholdMB,
}
return &KubeletConfig{
Address: s.Address,
AllowPrivileged: s.AllowPrivileged,
HostNetworkSources: hostNetworkSources,
HostnameOverride: s.HostnameOverride,
RootDirectory: s.RootDirectory,
ConfigFile: s.Config,
ManifestURL: s.ManifestURL,
FileCheckFrequency: s.FileCheckFrequency,
HTTPCheckFrequency: s.HTTPCheckFrequency,
PodInfraContainerImage: s.PodInfraContainerImage,
SyncFrequency: s.SyncFrequency,
RegistryPullQPS: s.RegistryPullQPS,
RegistryBurst: s.RegistryBurst,
MinimumGCAge: s.MinimumGCAge,
MaxPerPodContainerCount: s.MaxPerPodContainerCount,
MaxContainerCount: s.MaxContainerCount,
RegisterNode: s.RegisterNode,
StandaloneMode: (len(s.APIServerList) == 0),
ClusterDomain: s.ClusterDomain,
ClusterDNS: s.ClusterDNS,
Runonce: s.RunOnce,
Port: s.Port,
ReadOnlyPort: s.ReadOnlyPort,
CadvisorInterface: nil, // launches background processes, not set here
EnableServer: s.EnableServer,
EnableDebuggingHandlers: s.EnableDebuggingHandlers,
DockerClient: dockertools.ConnectToDockerOrDie(s.DockerEndpoint),
KubeClient: nil,
MasterServiceNamespace: s.MasterServiceNamespace,
VolumePlugins: ProbeVolumePlugins(),
NetworkPlugins: ProbeNetworkPlugins(),
NetworkPluginName: s.NetworkPluginName,
StreamingConnectionIdleTimeout: s.StreamingConnectionIdleTimeout,
TLSOptions: tlsOptions,
ImageGCPolicy: imageGCPolicy,
DiskSpacePolicy: diskSpacePolicy,
Cloud: nil, // cloud provider might start background processes
NodeStatusUpdateFrequency: s.NodeStatusUpdateFrequency,
ResourceContainer: s.ResourceContainer,
CgroupRoot: s.CgroupRoot,
ContainerRuntime: s.ContainerRuntime,
Mounter: mounter,
DockerDaemonContainer: s.DockerDaemonContainer,
SystemContainer: s.SystemContainer,
ConfigureCBR0: s.ConfigureCBR0,
PodCIDR: s.PodCIDR,
MaxPods: s.MaxPods,
DockerExecHandler: dockerExecHandler,
}, nil
}