// Run starts an http server for the static assets listening on the configured
// bind address
func (c *AssetConfig) Run() {
publicURL, err := url.Parse(c.Options.PublicURL)
if err != nil {
glog.Fatal(err)
}
mux := http.NewServeMux()
err = c.addHandlers(mux)
if err != nil {
glog.Fatal(err)
}
if publicURL.Path != "/" {
mux.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
http.Redirect(w, req, publicURL.Path, http.StatusFound)
})
}
timeout := c.Options.ServingInfo.RequestTimeoutSeconds
if timeout == -1 {
timeout = 0
}
server := &http.Server{
Addr: c.Options.ServingInfo.BindAddress,
Handler: mux,
ReadTimeout: time.Duration(timeout) * time.Second,
WriteTimeout: time.Duration(timeout) * time.Second,
MaxHeaderBytes: 1 << 20,
}
isTLS := configapi.UseTLS(c.Options.ServingInfo.ServingInfo)
go util.Forever(func() {
if isTLS {
extraCerts, err := configapi.GetNamedCertificateMap(c.Options.ServingInfo.NamedCertificates)
if err != nil {
glog.Fatal(err)
}
server.TLSConfig = &tls.Config{
// Change default from SSLv3 to TLSv1.0 (because of POODLE vulnerability)
MinVersion: tls.VersionTLS10,
// Set SNI certificate func
GetCertificate: cmdutil.GetCertificateFunc(extraCerts),
}
glog.Infof("Web console listening at https://%s", c.Options.ServingInfo.BindAddress)
glog.Fatal(cmdutil.ListenAndServeTLS(server, c.Options.ServingInfo.BindNetwork, c.Options.ServingInfo.ServerCert.CertFile, c.Options.ServingInfo.ServerCert.KeyFile))
} else {
glog.Infof("Web console listening at http://%s", c.Options.ServingInfo.BindAddress)
glog.Fatal(server.ListenAndServe())
}
}, 0)
// Attempt to verify the server came up for 20 seconds (100 tries * 100ms, 100ms timeout per try)
cmdutil.WaitForSuccessfulDial(isTLS, c.Options.ServingInfo.BindNetwork, c.Options.ServingInfo.BindAddress, 100*time.Millisecond, 100*time.Millisecond, 100)
glog.Infof("Web console available at %s", c.Options.PublicURL)
}
// Run starts an http server for the static assets listening on the configured
// bind address
func (c *AssetConfig) Run() {
mux, err := c.addHandlers(nil)
if err != nil {
glog.Fatal(err)
}
timeout := c.Options.ServingInfo.RequestTimeoutSeconds
if timeout == -1 {
timeout = 0
}
server := &http.Server{
Addr: c.Options.ServingInfo.BindAddress,
Handler: mux,
ReadTimeout: time.Duration(timeout) * time.Second,
WriteTimeout: time.Duration(timeout) * time.Second,
MaxHeaderBytes: 1 << 20,
}
isTLS := configapi.UseTLS(c.Options.ServingInfo.ServingInfo)
go utilwait.Forever(func() {
if isTLS {
extraCerts, err := configapi.GetNamedCertificateMap(c.Options.ServingInfo.NamedCertificates)
if err != nil {
glog.Fatal(err)
}
server.TLSConfig = crypto.SecureTLSConfig(&tls.Config{
// Set SNI certificate func
GetCertificate: cmdutil.GetCertificateFunc(extraCerts),
})
glog.Infof("Web console listening at https://%s", c.Options.ServingInfo.BindAddress)
glog.Fatal(cmdutil.ListenAndServeTLS(server, c.Options.ServingInfo.BindNetwork, c.Options.ServingInfo.ServerCert.CertFile, c.Options.ServingInfo.ServerCert.KeyFile))
} else {
glog.Infof("Web console listening at http://%s", c.Options.ServingInfo.BindAddress)
glog.Fatal(server.ListenAndServe())
}
}, 0)
// Attempt to verify the server came up for 20 seconds (100 tries * 100ms, 100ms timeout per try)
cmdutil.WaitForSuccessfulDial(isTLS, c.Options.ServingInfo.BindNetwork, c.Options.ServingInfo.BindAddress, 100*time.Millisecond, 100*time.Millisecond, 100)
glog.Infof("Web console available at %s", c.Options.PublicURL)
}
// serve starts serving the provided http.Handler using security settings derived from the MasterConfig
func (c *MasterConfig) serve(handler http.Handler, extra []string) {
timeout := c.Options.ServingInfo.RequestTimeoutSeconds
if timeout == -1 {
timeout = 0
}
server := &http.Server{
Addr: c.Options.ServingInfo.BindAddress,
Handler: handler,
ReadTimeout: time.Duration(timeout) * time.Second,
WriteTimeout: time.Duration(timeout) * time.Second,
MaxHeaderBytes: 1 << 20,
}
go util.Forever(func() {
for _, s := range extra {
glog.Infof(s, c.Options.ServingInfo.BindAddress)
}
if c.TLS {
extraCerts, err := configapi.GetNamedCertificateMap(c.Options.ServingInfo.NamedCertificates)
if err != nil {
glog.Fatal(err)
}
server.TLSConfig = &tls.Config{
// Change default from SSLv3 to TLSv1.0 (because of POODLE vulnerability)
MinVersion: tls.VersionTLS10,
// Populate PeerCertificates in requests, but don't reject connections without certificates
// This allows certificates to be validated by authenticators, while still allowing other auth types
ClientAuth: tls.RequestClientCert,
ClientCAs: c.ClientCAs,
// Set SNI certificate func
GetCertificate: cmdutil.GetCertificateFunc(extraCerts),
}
glog.Fatal(cmdutil.ListenAndServeTLS(server, c.Options.ServingInfo.BindNetwork, c.Options.ServingInfo.ServerCert.CertFile, c.Options.ServingInfo.ServerCert.KeyFile))
} else {
glog.Fatal(server.ListenAndServe())
}
}, 0)
}
func BuildKubernetesNodeConfig(options configapi.NodeConfig, enableProxy, enableDNS bool) (*NodeConfig, error) {
originClient, _, err := configapi.GetOpenShiftClient(options.MasterKubeConfig, options.MasterClientConnectionOverrides)
if err != nil {
return nil, err
}
_, kubeClient, _, err := configapi.GetKubeClient(options.MasterKubeConfig, options.MasterClientConnectionOverrides)
if err != nil {
return nil, err
}
// Make a separate client for event reporting, to avoid event QPS blocking node calls
_, eventClient, _, err := configapi.GetKubeClient(options.MasterKubeConfig, options.MasterClientConnectionOverrides)
if err != nil {
return nil, err
}
if options.NodeName == "localhost" {
glog.Warningf(`Using "localhost" as node name will not resolve from all locations`)
}
clientCAs, err := kcrypto.CertPoolFromFile(options.ServingInfo.ClientCA)
if err != nil {
return nil, err
}
imageTemplate := variable.NewDefaultImageTemplate()
imageTemplate.Format = options.ImageConfig.Format
imageTemplate.Latest = options.ImageConfig.Latest
var path string
var fileCheckInterval int64
if options.PodManifestConfig != nil {
path = options.PodManifestConfig.Path
fileCheckInterval = options.PodManifestConfig.FileCheckIntervalSeconds
}
kubeAddressStr, kubePortStr, err := net.SplitHostPort(options.ServingInfo.BindAddress)
if err != nil {
return nil, fmt.Errorf("cannot parse node address: %v", err)
}
kubePort, err := strconv.Atoi(kubePortStr)
if err != nil {
return nil, fmt.Errorf("cannot parse node port: %v", err)
}
if err = validateNetworkPluginName(originClient, options.NetworkConfig.NetworkPluginName); err != nil {
return nil, err
}
// Defaults are tested in TestKubeletDefaults
server := kubeletoptions.NewKubeletServer()
// Adjust defaults
server.RequireKubeConfig = true
server.PodManifestPath = path
server.RootDirectory = options.VolumeDirectory
server.NodeIP = options.NodeIP
server.HostnameOverride = options.NodeName
server.AllowPrivileged = true
server.RegisterNode = true
server.Address = kubeAddressStr
server.Port = int32(kubePort)
server.ReadOnlyPort = 0 // no read only access
server.CAdvisorPort = 0 // no unsecured cadvisor access
server.HealthzPort = 0 // no unsecured healthz access
server.HealthzBindAddress = "" // no unsecured healthz access
server.ClusterDNS = options.DNSIP
server.ClusterDomain = options.DNSDomain
server.NetworkPluginName = options.NetworkConfig.NetworkPluginName
server.HostNetworkSources = []string{kubelettypes.ApiserverSource, kubelettypes.FileSource}
server.HostPIDSources = []string{kubelettypes.ApiserverSource, kubelettypes.FileSource}
server.HostIPCSources = []string{kubelettypes.ApiserverSource, kubelettypes.FileSource}
server.HTTPCheckFrequency = unversioned.Duration{Duration: time.Duration(0)} // no remote HTTP pod creation access
server.FileCheckFrequency = unversioned.Duration{Duration: time.Duration(fileCheckInterval) * time.Second}
server.PodInfraContainerImage = imageTemplate.ExpandOrDie("pod")
server.CPUCFSQuota = true // enable cpu cfs quota enforcement by default
server.MaxPods = 250
server.PodsPerCore = 10
server.SerializeImagePulls = false // disable serialized image pulls by default
server.EnableControllerAttachDetach = false // stay consistent with existing config, but admins should enable it
if enableDNS {
// if we are running local DNS, skydns will load the default recursive nameservers for us
server.ResolverConfig = ""
}
server.DockerExecHandlerName = string(options.DockerConfig.ExecHandlerName)
if sdnapi.IsOpenShiftNetworkPlugin(server.NetworkPluginName) {
// set defaults for openshift-sdn
server.HairpinMode = componentconfig.HairpinNone
server.ConfigureCBR0 = false
}
// prevents kube from generating certs
server.TLSCertFile = options.ServingInfo.ServerCert.CertFile
server.TLSPrivateKeyFile = options.ServingInfo.ServerCert.KeyFile
containerized := cmdutil.Env("OPENSHIFT_CONTAINERIZED", "") == "true"
server.Containerized = containerized
// resolve extended arguments
// TODO: this should be done in config validation (along with the above) so we can provide
// proper errors
if err := cmdflags.Resolve(options.KubeletArguments, server.AddFlags); len(err) > 0 {
return nil, kerrors.NewAggregate(err)
}
proxyconfig, err := buildKubeProxyConfig(options)
if err != nil {
return nil, err
}
// Initialize SDN before building kubelet config so it can modify options
iptablesSyncPeriod, err := time.ParseDuration(options.IPTablesSyncPeriod)
if err != nil {
return nil, fmt.Errorf("Cannot parse the provided ip-tables sync period (%s) : %v", options.IPTablesSyncPeriod, err)
}
sdnPlugin, err := sdnplugin.NewNodePlugin(options.NetworkConfig.NetworkPluginName, originClient, kubeClient, options.NodeName, options.NodeIP, iptablesSyncPeriod, options.NetworkConfig.MTU)
if err != nil {
return nil, fmt.Errorf("SDN initialization failed: %v", err)
}
if sdnPlugin != nil {
// SDN plugin pod setup/teardown is implemented as a CNI plugin
server.NetworkPluginName = kubeletcni.CNIPluginName
server.NetworkPluginDir = kubeletcni.DefaultNetDir
server.HairpinMode = componentconfig.HairpinNone
server.ConfigureCBR0 = false
}
deps, err := kubeletapp.UnsecuredKubeletDeps(server)
if err != nil {
return nil, err
}
// Initialize cloud provider
cloud, err := buildCloudProvider(server)
if err != nil {
return nil, err
}
deps.Cloud = cloud
// Replace the kubelet-created CNI plugin with the SDN plugin
// Kubelet must be initialized with NetworkPluginName="cni" but
// the SDN plugin (if available) needs to be the only one used
if sdnPlugin != nil {
deps.NetworkPlugins = []kubeletnetwork.NetworkPlugin{sdnPlugin}
}
// provide any config overrides
//deps.NodeName = options.NodeName
deps.KubeClient = kubeClient
deps.EventClient = eventClient
// Setup auth
authnTTL, err := time.ParseDuration(options.AuthConfig.AuthenticationCacheTTL)
if err != nil {
return nil, err
}
authn, err := newAuthenticator(kubeClient.Authentication(), clientCAs, authnTTL, options.AuthConfig.AuthenticationCacheSize)
if err != nil {
return nil, err
}
authzAttr, err := newAuthorizerAttributesGetter(options.NodeName)
if err != nil {
return nil, err
}
authzTTL, err := time.ParseDuration(options.AuthConfig.AuthorizationCacheTTL)
if err != nil {
return nil, err
}
authz, err := newAuthorizer(originClient, authzTTL, options.AuthConfig.AuthorizationCacheSize)
if err != nil {
return nil, err
}
deps.Auth = kubeletserver.NewKubeletAuth(authn, authzAttr, authz)
// TODO: could be cleaner
if configapi.UseTLS(options.ServingInfo) {
extraCerts, err := configapi.GetNamedCertificateMap(options.ServingInfo.NamedCertificates)
if err != nil {
return nil, err
}
deps.TLSOptions = &kubeletserver.TLSOptions{
Config: crypto.SecureTLSConfig(&tls.Config{
// RequestClientCert lets us request certs, but allow requests without client certs
// Verification is done by the authn layer
ClientAuth: tls.RequestClientCert,
ClientCAs: clientCAs,
// Set SNI certificate func
// Do not use NameToCertificate, since that requires certificates be included in the server's tlsConfig.Certificates list,
// which we do not control when running with http.Server#ListenAndServeTLS
GetCertificate: cmdutil.GetCertificateFunc(extraCerts),
}),
CertFile: options.ServingInfo.ServerCert.CertFile,
KeyFile: options.ServingInfo.ServerCert.KeyFile,
}
} else {
deps.TLSOptions = nil
}
sdnProxy, err := sdnplugin.NewProxyPlugin(options.NetworkConfig.NetworkPluginName, originClient, kubeClient)
if err != nil {
return nil, fmt.Errorf("SDN proxy initialization failed: %v", err)
}
config := &NodeConfig{
BindAddress: options.ServingInfo.BindAddress,
AllowDisabledDocker: options.AllowDisabledDocker,
Containerized: containerized,
Client: kubeClient,
VolumeDir: options.VolumeDirectory,
KubeletServer: server,
KubeletDeps: deps,
ServicesReady: make(chan struct{}),
ProxyConfig: proxyconfig,
EnableUnidling: options.EnableUnidling,
SDNPlugin: sdnPlugin,
SDNProxy: sdnProxy,
}
if enableDNS {
dnsConfig, err := dns.NewServerDefaults()
if err != nil {
return nil, fmt.Errorf("DNS configuration was not possible: %v", err)
}
if len(options.DNSIP) > 0 {
dnsConfig.DnsAddr = options.DNSIP + ":53"
}
dnsConfig.Domain = server.ClusterDomain + "."
dnsConfig.Local = "openshift.default.svc." + dnsConfig.Domain
services, serviceStore := dns.NewCachedServiceAccessorAndStore()
endpoints, endpointsStore := dns.NewCachedEndpointsAccessorAndStore()
if !enableProxy {
endpoints = deps.KubeClient
endpointsStore = nil
}
// TODO: use kubeletConfig.ResolverConfig as an argument to etcd in the event the
// user sets it, instead of passing it to the kubelet.
config.ServiceStore = serviceStore
config.EndpointsStore = endpointsStore
config.DNSServer = &dns.Server{
Config: dnsConfig,
Services: services,
Endpoints: endpoints,
MetricsName: "node",
}
}
return config, nil
}
func BuildKubernetesNodeConfig(options configapi.NodeConfig) (*NodeConfig, error) {
kubeClient, _, err := configapi.GetKubeClient(options.MasterKubeConfig)
if err != nil {
return nil, err
}
if options.NodeName == "localhost" {
glog.Warningf(`Using "localhost" as node name will not resolve from all locations`)
}
var dnsIP net.IP
if len(options.DNSIP) > 0 {
dnsIP = net.ParseIP(options.DNSIP)
if dnsIP == nil {
return nil, fmt.Errorf("Invalid DNS IP: %s", options.DNSIP)
}
}
clientCAs, err := util.CertPoolFromFile(options.ServingInfo.ClientCA)
if err != nil {
return nil, err
}
imageTemplate := variable.NewDefaultImageTemplate()
imageTemplate.Format = options.ImageConfig.Format
imageTemplate.Latest = options.ImageConfig.Latest
var path string
var fileCheckInterval int64
if options.PodManifestConfig != nil {
path = options.PodManifestConfig.Path
fileCheckInterval = options.PodManifestConfig.FileCheckIntervalSeconds
}
var dockerExecHandler dockertools.ExecHandler
switch options.DockerConfig.ExecHandlerName {
case configapi.DockerExecHandlerNative:
dockerExecHandler = &dockertools.NativeExecHandler{}
case configapi.DockerExecHandlerNsenter:
dockerExecHandler = &dockertools.NsenterExecHandler{}
}
kubeAddressStr, kubePortStr, err := net.SplitHostPort(options.ServingInfo.BindAddress)
if err != nil {
return nil, fmt.Errorf("cannot parse node address: %v", err)
}
kubePort, err := strconv.Atoi(kubePortStr)
if err != nil {
return nil, fmt.Errorf("cannot parse node port: %v", err)
}
kubeAddress := net.ParseIP(kubeAddressStr)
if kubeAddress == nil {
return nil, fmt.Errorf("Invalid DNS IP: %s", kubeAddressStr)
}
// declare the OpenShift defaults from config
server := kapp.NewKubeletServer()
server.Config = path
server.RootDirectory = options.VolumeDirectory
// kubelet finds the node IP address by doing net.ParseIP(hostname) and if that fails,
// it does net.LookupIP(NodeName) and picks the first non-loopback address.
// Pass node IP as hostname to make kubelet use the desired IP address.
if len(options.NodeIP) > 0 {
server.HostnameOverride = options.NodeIP
} else {
server.HostnameOverride = options.NodeName
}
server.AllowPrivileged = true
server.RegisterNode = true
server.Address = kubeAddress
server.Port = uint(kubePort)
server.ReadOnlyPort = 0 // no read only access
server.CAdvisorPort = 0 // no unsecured cadvisor access
server.HealthzPort = 0 // no unsecured healthz access
server.ClusterDNS = dnsIP
server.ClusterDomain = options.DNSDomain
server.NetworkPluginName = options.NetworkConfig.NetworkPluginName
server.HostNetworkSources = strings.Join([]string{kubelettypes.ApiserverSource, kubelettypes.FileSource}, ",")
server.HostPIDSources = strings.Join([]string{kubelettypes.ApiserverSource, kubelettypes.FileSource}, ",")
server.HostIPCSources = strings.Join([]string{kubelettypes.ApiserverSource, kubelettypes.FileSource}, ",")
server.HTTPCheckFrequency = 0 // no remote HTTP pod creation access
server.FileCheckFrequency = time.Duration(fileCheckInterval) * time.Second
server.PodInfraContainerImage = imageTemplate.ExpandOrDie("pod")
server.CPUCFSQuota = true // enable cpu cfs quota enforcement by default
// prevents kube from generating certs
server.TLSCertFile = options.ServingInfo.ServerCert.CertFile
server.TLSPrivateKeyFile = options.ServingInfo.ServerCert.KeyFile
if value := cmdutil.Env("OPENSHIFT_CONTAINERIZED", ""); len(value) > 0 {
server.Containerized = value == "true"
}
// resolve extended arguments
// TODO: this should be done in config validation (along with the above) so we can provide
// proper errors
if err := cmdflags.Resolve(options.KubeletArguments, server.AddFlags); len(err) > 0 {
return nil, errors.NewAggregate(err)
}
cfg, err := server.UnsecuredKubeletConfig()
if err != nil {
return nil, err
}
// provide any config overrides
cfg.NodeName = options.NodeName
cfg.StreamingConnectionIdleTimeout = 5 * time.Minute // TODO: should be set
cfg.KubeClient = kubeClient
cfg.DockerExecHandler = dockerExecHandler
// Setup auth
osClient, osClientConfig, err := configapi.GetOpenShiftClient(options.MasterKubeConfig)
if err != nil {
return nil, err
}
authnTTL, err := time.ParseDuration(options.AuthConfig.AuthenticationCacheTTL)
if err != nil {
return nil, err
}
authn, err := newAuthenticator(clientCAs, clientcmd.AnonymousClientConfig(*osClientConfig), authnTTL, options.AuthConfig.AuthenticationCacheSize)
if err != nil {
return nil, err
}
authzAttr, err := newAuthorizerAttributesGetter(options.NodeName)
if err != nil {
return nil, err
}
authzTTL, err := time.ParseDuration(options.AuthConfig.AuthorizationCacheTTL)
if err != nil {
return nil, err
}
authz, err := newAuthorizer(osClient, authzTTL, options.AuthConfig.AuthorizationCacheSize)
if err != nil {
return nil, err
}
cfg.Auth = kubelet.NewKubeletAuth(authn, authzAttr, authz)
// Make sure the node doesn't think it is in standalone mode
// This is required for the node to enforce nodeSelectors on pods, to set hostIP on pod status updates, etc
cfg.StandaloneMode = false
// TODO: could be cleaner
if configapi.UseTLS(options.ServingInfo) {
extraCerts, err := configapi.GetNamedCertificateMap(options.ServingInfo.NamedCertificates)
if err != nil {
return nil, err
}
cfg.TLSOptions = &kubelet.TLSOptions{
Config: crypto.SecureTLSConfig(&tls.Config{
// RequestClientCert lets us request certs, but allow requests without client certs
// Verification is done by the authn layer
ClientAuth: tls.RequestClientCert,
ClientCAs: clientCAs,
// Set SNI certificate func
// Do not use NameToCertificate, since that requires certificates be included in the server's tlsConfig.Certificates list,
// which we do not control when running with http.Server#ListenAndServeTLS
GetCertificate: cmdutil.GetCertificateFunc(extraCerts),
}),
CertFile: options.ServingInfo.ServerCert.CertFile,
KeyFile: options.ServingInfo.ServerCert.KeyFile,
}
} else {
cfg.TLSOptions = nil
}
// Prepare cloud provider
cloud, err := cloudprovider.InitCloudProvider(server.CloudProvider, server.CloudConfigFile)
if err != nil {
return nil, err
}
if cloud != nil {
glog.V(2).Infof("Successfully initialized cloud provider: %q from the config file: %q\n", server.CloudProvider, server.CloudConfigFile)
}
cfg.Cloud = cloud
config := &NodeConfig{
BindAddress: options.ServingInfo.BindAddress,
AllowDisabledDocker: options.AllowDisabledDocker,
Client: kubeClient,
VolumeDir: options.VolumeDirectory,
KubeletServer: server,
KubeletConfig: cfg,
IPTablesSyncPeriod: options.IPTablesSyncPeriod,
}
return config, nil
}
func BuildKubernetesNodeConfig(options configapi.NodeConfig) (*NodeConfig, error) {
originClient, _, err := configapi.GetOpenShiftClient(options.MasterKubeConfig)
if err != nil {
return nil, err
}
kubeClient, _, err := configapi.GetKubeClient(options.MasterKubeConfig)
if err != nil {
return nil, err
}
// Make a separate client for event reporting, to avoid event QPS blocking node calls
eventClient, _, err := configapi.GetKubeClient(options.MasterKubeConfig)
if err != nil {
return nil, err
}
if options.NodeName == "localhost" {
glog.Warningf(`Using "localhost" as node name will not resolve from all locations`)
}
clientCAs, err := util.CertPoolFromFile(options.ServingInfo.ClientCA)
if err != nil {
return nil, err
}
imageTemplate := variable.NewDefaultImageTemplate()
imageTemplate.Format = options.ImageConfig.Format
imageTemplate.Latest = options.ImageConfig.Latest
var path string
var fileCheckInterval int64
if options.PodManifestConfig != nil {
path = options.PodManifestConfig.Path
fileCheckInterval = options.PodManifestConfig.FileCheckIntervalSeconds
}
var dockerExecHandler dockertools.ExecHandler
switch options.DockerConfig.ExecHandlerName {
case configapi.DockerExecHandlerNative:
dockerExecHandler = &dockertools.NativeExecHandler{}
case configapi.DockerExecHandlerNsenter:
dockerExecHandler = &dockertools.NsenterExecHandler{}
}
kubeAddressStr, kubePortStr, err := net.SplitHostPort(options.ServingInfo.BindAddress)
if err != nil {
return nil, fmt.Errorf("cannot parse node address: %v", err)
}
kubePort, err := strconv.Atoi(kubePortStr)
if err != nil {
return nil, fmt.Errorf("cannot parse node port: %v", err)
}
// declare the OpenShift defaults from config
server := kubeletoptions.NewKubeletServer()
server.Config = path
server.RootDirectory = options.VolumeDirectory
server.NodeIP = options.NodeIP
server.HostnameOverride = options.NodeName
server.AllowPrivileged = true
server.RegisterNode = true
server.Address = kubeAddressStr
server.Port = uint(kubePort)
server.ReadOnlyPort = 0 // no read only access
server.CAdvisorPort = 0 // no unsecured cadvisor access
server.HealthzPort = 0 // no unsecured healthz access
server.ClusterDNS = options.DNSIP
server.ClusterDomain = options.DNSDomain
server.NetworkPluginName = options.NetworkConfig.NetworkPluginName
server.HostNetworkSources = strings.Join([]string{kubelettypes.ApiserverSource, kubelettypes.FileSource}, ",")
server.HostPIDSources = strings.Join([]string{kubelettypes.ApiserverSource, kubelettypes.FileSource}, ",")
server.HostIPCSources = strings.Join([]string{kubelettypes.ApiserverSource, kubelettypes.FileSource}, ",")
server.HTTPCheckFrequency = unversioned.Duration{Duration: time.Duration(0)} // no remote HTTP pod creation access
server.FileCheckFrequency = unversioned.Duration{Duration: time.Duration(fileCheckInterval) * time.Second}
server.PodInfraContainerImage = imageTemplate.ExpandOrDie("pod")
server.CPUCFSQuota = true // enable cpu cfs quota enforcement by default
server.MaxPods = 110
// prevents kube from generating certs
server.TLSCertFile = options.ServingInfo.ServerCert.CertFile
server.TLSPrivateKeyFile = options.ServingInfo.ServerCert.KeyFile
containerized := cmdutil.Env("OPENSHIFT_CONTAINERIZED", "") == "true"
server.Containerized = containerized
// resolve extended arguments
// TODO: this should be done in config validation (along with the above) so we can provide
// proper errors
if err := cmdflags.Resolve(options.KubeletArguments, server.AddFlags); len(err) > 0 {
return nil, kerrors.NewAggregate(err)
}
proxyconfig, err := buildKubeProxyConfig(options)
if err != nil {
return nil, err
}
cfg, err := kubeletapp.UnsecuredKubeletConfig(server)
if err != nil {
return nil, err
}
// Replace the standard k8s emptyDir volume plugin with a wrapper version
// which offers XFS quota functionality, but only if the node config
// specifies an empty dir quota to apply to projects:
if options.VolumeConfig.LocalQuota.PerFSGroup != nil {
glog.V(2).Info("Replacing empty-dir volume plugin with quota wrapper")
wrappedEmptyDirPlugin := false
quotaApplicator, err := empty_dir.NewQuotaApplicator(options.VolumeDirectory)
if err != nil {
return nil, err
}
// Create a volume spec with emptyDir we can use to search for the
// emptyDir plugin with CanSupport:
emptyDirSpec := &volume.Spec{
Volume: &kapi.Volume{
VolumeSource: kapi.VolumeSource{
EmptyDir: &kapi.EmptyDirVolumeSource{},
},
},
}
for idx, plugin := range cfg.VolumePlugins {
// Can't really do type checking or use a constant here as they are not exported:
if plugin.CanSupport(emptyDirSpec) {
wrapper := empty_dir.EmptyDirQuotaPlugin{
Wrapped: plugin,
Quota: *options.VolumeConfig.LocalQuota.PerFSGroup,
QuotaApplicator: quotaApplicator,
}
cfg.VolumePlugins[idx] = &wrapper
wrappedEmptyDirPlugin = true
}
}
// Because we can't look for the k8s emptyDir plugin by any means that would
// survive a refactor, error out if we couldn't find it:
if !wrappedEmptyDirPlugin {
return nil, errors.New("unable to wrap emptyDir volume plugin for quota support")
}
} else {
glog.V(2).Info("Skipping replacement of empty-dir volume plugin with quota wrapper, no local fsGroup quota specified")
}
// provide any config overrides
cfg.NodeName = options.NodeName
cfg.KubeClient = internalclientset.FromUnversionedClient(kubeClient)
cfg.EventClient = internalclientset.FromUnversionedClient(eventClient)
cfg.DockerExecHandler = dockerExecHandler
// docker-in-docker (dind) deployments are used for testing
// networking plugins. Running openshift under dind won't work
// with the real oom adjuster due to the state of the cgroups path
// in a dind container that uses systemd for init. Similarly,
// cgroup manipulation of the nested docker daemon doesn't work
// properly under centos/rhel and should be disabled by setting
// the name of the container to an empty string.
//
// This workaround should become unnecessary once user namespaces
if value := cmdutil.Env("OPENSHIFT_DIND", ""); value == "true" {
glog.Warningf("Using FakeOOMAdjuster for docker-in-docker compatibility")
cfg.OOMAdjuster = oom.NewFakeOOMAdjuster()
}
// Setup auth
osClient, osClientConfig, err := configapi.GetOpenShiftClient(options.MasterKubeConfig)
if err != nil {
return nil, err
}
authnTTL, err := time.ParseDuration(options.AuthConfig.AuthenticationCacheTTL)
if err != nil {
return nil, err
}
authn, err := newAuthenticator(clientCAs, clientcmd.AnonymousClientConfig(osClientConfig), authnTTL, options.AuthConfig.AuthenticationCacheSize)
if err != nil {
return nil, err
}
authzAttr, err := newAuthorizerAttributesGetter(options.NodeName)
if err != nil {
return nil, err
}
authzTTL, err := time.ParseDuration(options.AuthConfig.AuthorizationCacheTTL)
if err != nil {
return nil, err
}
authz, err := newAuthorizer(osClient, authzTTL, options.AuthConfig.AuthorizationCacheSize)
if err != nil {
return nil, err
}
cfg.Auth = kubeletserver.NewKubeletAuth(authn, authzAttr, authz)
// Make sure the node doesn't think it is in standalone mode
// This is required for the node to enforce nodeSelectors on pods, to set hostIP on pod status updates, etc
cfg.StandaloneMode = false
// TODO: could be cleaner
if configapi.UseTLS(options.ServingInfo) {
extraCerts, err := configapi.GetNamedCertificateMap(options.ServingInfo.NamedCertificates)
if err != nil {
return nil, err
}
cfg.TLSOptions = &kubeletserver.TLSOptions{
Config: crypto.SecureTLSConfig(&tls.Config{
// RequestClientCert lets us request certs, but allow requests without client certs
// Verification is done by the authn layer
ClientAuth: tls.RequestClientCert,
ClientCAs: clientCAs,
// Set SNI certificate func
// Do not use NameToCertificate, since that requires certificates be included in the server's tlsConfig.Certificates list,
// which we do not control when running with http.Server#ListenAndServeTLS
GetCertificate: cmdutil.GetCertificateFunc(extraCerts),
}),
CertFile: options.ServingInfo.ServerCert.CertFile,
KeyFile: options.ServingInfo.ServerCert.KeyFile,
}
} else {
cfg.TLSOptions = nil
}
// Prepare cloud provider
cloud, err := cloudprovider.InitCloudProvider(server.CloudProvider, server.CloudConfigFile)
if err != nil {
return nil, err
}
if cloud != nil {
glog.V(2).Infof("Successfully initialized cloud provider: %q from the config file: %q\n", server.CloudProvider, server.CloudConfigFile)
}
cfg.Cloud = cloud
sdnPlugin, endpointFilter, err := factory.NewPlugin(options.NetworkConfig.NetworkPluginName, originClient, kubeClient, options.NodeName, options.NodeIP)
if err != nil {
return nil, fmt.Errorf("SDN initialization failed: %v", err)
}
if sdnPlugin != nil {
cfg.NetworkPlugins = append(cfg.NetworkPlugins, sdnPlugin)
}
config := &NodeConfig{
BindAddress: options.ServingInfo.BindAddress,
AllowDisabledDocker: options.AllowDisabledDocker,
Containerized: containerized,
Client: kubeClient,
VolumeDir: options.VolumeDirectory,
KubeletServer: server,
KubeletConfig: cfg,
ProxyConfig: proxyconfig,
MTU: options.NetworkConfig.MTU,
SDNPlugin: sdnPlugin,
FilteringEndpointsHandler: endpointFilter,
}
return config, nil
}
func BuildKubernetesNodeConfig(options configapi.NodeConfig) (*NodeConfig, error) {
originClient, osClientConfig, err := configapi.GetOpenShiftClient(options.MasterKubeConfig)
if err != nil {
return nil, err
}
kubeClient, _, err := configapi.GetKubeClient(options.MasterKubeConfig)
if err != nil {
return nil, err
}
// Make a separate client for event reporting, to avoid event QPS blocking node calls
eventClient, _, err := configapi.GetKubeClient(options.MasterKubeConfig)
if err != nil {
return nil, err
}
if options.NodeName == "localhost" {
glog.Warningf(`Using "localhost" as node name will not resolve from all locations`)
}
clientCAs, err := kcrypto.CertPoolFromFile(options.ServingInfo.ClientCA)
if err != nil {
return nil, err
}
imageTemplate := variable.NewDefaultImageTemplate()
imageTemplate.Format = options.ImageConfig.Format
imageTemplate.Latest = options.ImageConfig.Latest
var path string
var fileCheckInterval int64
if options.PodManifestConfig != nil {
path = options.PodManifestConfig.Path
fileCheckInterval = options.PodManifestConfig.FileCheckIntervalSeconds
}
var dockerExecHandler dockertools.ExecHandler
switch options.DockerConfig.ExecHandlerName {
case configapi.DockerExecHandlerNative:
dockerExecHandler = &dockertools.NativeExecHandler{}
case configapi.DockerExecHandlerNsenter:
dockerExecHandler = &dockertools.NsenterExecHandler{}
}
kubeAddressStr, kubePortStr, err := net.SplitHostPort(options.ServingInfo.BindAddress)
if err != nil {
return nil, fmt.Errorf("cannot parse node address: %v", err)
}
kubePort, err := strconv.Atoi(kubePortStr)
if err != nil {
return nil, fmt.Errorf("cannot parse node port: %v", err)
}
// Defaults are tested in TestKubeletDefaults
server := kubeletoptions.NewKubeletServer()
// Adjust defaults
server.Config = path
server.RootDirectory = options.VolumeDirectory
server.NodeIP = options.NodeIP
server.HostnameOverride = options.NodeName
server.AllowPrivileged = true
server.RegisterNode = true
server.Address = kubeAddressStr
server.Port = uint(kubePort)
server.ReadOnlyPort = 0 // no read only access
server.CAdvisorPort = 0 // no unsecured cadvisor access
server.HealthzPort = 0 // no unsecured healthz access
server.HealthzBindAddress = "" // no unsecured healthz access
server.ClusterDNS = options.DNSIP
server.ClusterDomain = options.DNSDomain
server.NetworkPluginName = options.NetworkConfig.NetworkPluginName
server.HostNetworkSources = strings.Join([]string{kubelettypes.ApiserverSource, kubelettypes.FileSource}, ",")
server.HostPIDSources = strings.Join([]string{kubelettypes.ApiserverSource, kubelettypes.FileSource}, ",")
server.HostIPCSources = strings.Join([]string{kubelettypes.ApiserverSource, kubelettypes.FileSource}, ",")
server.HTTPCheckFrequency = unversioned.Duration{Duration: time.Duration(0)} // no remote HTTP pod creation access
server.FileCheckFrequency = unversioned.Duration{Duration: time.Duration(fileCheckInterval) * time.Second}
server.PodInfraContainerImage = imageTemplate.ExpandOrDie("pod")
server.CPUCFSQuota = true // enable cpu cfs quota enforcement by default
server.MaxPods = 110
server.SerializeImagePulls = false // disable serial image pulls by default
switch server.NetworkPluginName {
case ovs.SingleTenantPluginName, ovs.MultiTenantPluginName:
// set defaults for openshift-sdn
server.HairpinMode = componentconfig.HairpinNone
server.ConfigureCBR0 = false
}
// prevents kube from generating certs
server.TLSCertFile = options.ServingInfo.ServerCert.CertFile
server.TLSPrivateKeyFile = options.ServingInfo.ServerCert.KeyFile
containerized := cmdutil.Env("OPENSHIFT_CONTAINERIZED", "") == "true"
server.Containerized = containerized
// resolve extended arguments
// TODO: this should be done in config validation (along with the above) so we can provide
// proper errors
if err := cmdflags.Resolve(options.KubeletArguments, server.AddFlags); len(err) > 0 {
return nil, kerrors.NewAggregate(err)
}
proxyconfig, err := buildKubeProxyConfig(options)
if err != nil {
return nil, err
}
cfg, err := kubeletapp.UnsecuredKubeletConfig(server)
if err != nil {
return nil, err
}
// provide any config overrides
cfg.NodeName = options.NodeName
cfg.KubeClient = clientadapter.FromUnversionedClient(kubeClient)
cfg.EventClient = clientadapter.FromUnversionedClient(eventClient)
cfg.DockerExecHandler = dockerExecHandler
// Setup auth
authnTTL, err := time.ParseDuration(options.AuthConfig.AuthenticationCacheTTL)
if err != nil {
return nil, err
}
authn, err := newAuthenticator(clientCAs, clientcmd.AnonymousClientConfig(osClientConfig), authnTTL, options.AuthConfig.AuthenticationCacheSize)
if err != nil {
return nil, err
}
authzAttr, err := newAuthorizerAttributesGetter(options.NodeName)
if err != nil {
return nil, err
}
authzTTL, err := time.ParseDuration(options.AuthConfig.AuthorizationCacheTTL)
if err != nil {
return nil, err
}
authz, err := newAuthorizer(originClient, authzTTL, options.AuthConfig.AuthorizationCacheSize)
if err != nil {
return nil, err
}
cfg.Auth = kubeletserver.NewKubeletAuth(authn, authzAttr, authz)
// Make sure the node doesn't think it is in standalone mode
// This is required for the node to enforce nodeSelectors on pods, to set hostIP on pod status updates, etc
cfg.StandaloneMode = false
// TODO: could be cleaner
if configapi.UseTLS(options.ServingInfo) {
extraCerts, err := configapi.GetNamedCertificateMap(options.ServingInfo.NamedCertificates)
if err != nil {
return nil, err
}
cfg.TLSOptions = &kubeletserver.TLSOptions{
Config: crypto.SecureTLSConfig(&tls.Config{
// RequestClientCert lets us request certs, but allow requests without client certs
// Verification is done by the authn layer
ClientAuth: tls.RequestClientCert,
ClientCAs: clientCAs,
// Set SNI certificate func
// Do not use NameToCertificate, since that requires certificates be included in the server's tlsConfig.Certificates list,
// which we do not control when running with http.Server#ListenAndServeTLS
GetCertificate: cmdutil.GetCertificateFunc(extraCerts),
}),
CertFile: options.ServingInfo.ServerCert.CertFile,
KeyFile: options.ServingInfo.ServerCert.KeyFile,
}
} else {
cfg.TLSOptions = nil
}
// Prepare cloud provider
cloud, err := cloudprovider.InitCloudProvider(server.CloudProvider, server.CloudConfigFile)
if err != nil {
return nil, err
}
if cloud != nil {
glog.V(2).Infof("Successfully initialized cloud provider: %q from the config file: %q\n", server.CloudProvider, server.CloudConfigFile)
}
cfg.Cloud = cloud
sdnPlugin, err := factory.NewNodePlugin(options.NetworkConfig.NetworkPluginName, originClient, kubeClient, options.NodeName, options.NodeIP)
if err != nil {
return nil, fmt.Errorf("SDN initialization failed: %v", err)
}
if sdnPlugin != nil {
cfg.NetworkPlugins = append(cfg.NetworkPlugins, sdnPlugin)
}
endpointFilter, err := factory.NewProxyPlugin(options.NetworkConfig.NetworkPluginName, originClient, kubeClient)
if err != nil {
return nil, fmt.Errorf("SDN proxy initialization failed: %v", err)
}
config := &NodeConfig{
BindAddress: options.ServingInfo.BindAddress,
AllowDisabledDocker: options.AllowDisabledDocker,
Containerized: containerized,
Client: kubeClient,
VolumeDir: options.VolumeDirectory,
KubeletServer: server,
KubeletConfig: cfg,
ProxyConfig: proxyconfig,
MTU: options.NetworkConfig.MTU,
SDNPlugin: sdnPlugin,
FilteringEndpointsHandler: endpointFilter,
}
return config, nil
}