// InClusterConfig returns a config object which uses the service account
// kubernetes gives to pods. It's intended for clients that expect to be
// running inside a pod running on kubernetes. It will return an error if
// called from a process not running in a kubernetes environment.
func InClusterConfig() (*Config, error) {
host, port := os.Getenv("KUBERNETES_SERVICE_HOST"), os.Getenv("KUBERNETES_SERVICE_PORT")
if len(host) == 0 || len(port) == 0 {
return nil, fmt.Errorf("unable to load in-cluster configuration, KUBERNETES_SERVICE_HOST and KUBERNETES_SERVICE_PORT must be defined")
}
token, err := ioutil.ReadFile("/var/run/secrets/kubernetes.io/serviceaccount/" + api.ServiceAccountTokenKey)
if err != nil {
return nil, err
}
tlsClientConfig := TLSClientConfig{}
rootCAFile := "/var/run/secrets/kubernetes.io/serviceaccount/" + api.ServiceAccountRootCAKey
if _, err := certutil.NewPool(rootCAFile); err != nil {
glog.Errorf("Expected to load root CA config from %s, but got err: %v", rootCAFile, err)
} else {
tlsClientConfig.CAFile = rootCAFile
}
return &Config{
// TODO: switch to using cluster DNS.
Host: "https://" + net.JoinHostPort(host, port),
BearerToken: string(token),
TLSClientConfig: tlsClientConfig,
}, nil
}
// InitializeTLS checks for a configured TLSCertFile and TLSPrivateKeyFile: if unspecified a new self-signed
// certificate and key file are generated. Returns a configured server.TLSOptions object.
func InitializeTLS(kc *componentconfig.KubeletConfiguration) (*server.TLSOptions, error) {
if kc.TLSCertFile == "" && kc.TLSPrivateKeyFile == "" {
kc.TLSCertFile = path.Join(kc.CertDirectory, "kubelet.crt")
kc.TLSPrivateKeyFile = path.Join(kc.CertDirectory, "kubelet.key")
if !certutil.CanReadCertOrKey(kc.TLSCertFile, kc.TLSPrivateKeyFile) {
if err := certutil.GenerateSelfSignedCert(nodeutil.GetHostname(kc.HostnameOverride), kc.TLSCertFile, kc.TLSPrivateKeyFile, nil, nil); err != nil {
return nil, fmt.Errorf("unable to generate self signed cert: %v", err)
}
glog.V(4).Infof("Using self-signed cert (%s, %s)", kc.TLSCertFile, kc.TLSPrivateKeyFile)
}
}
tlsOptions := &server.TLSOptions{
Config: &tls.Config{
// Can't use SSLv3 because of POODLE and BEAST
// Can't use TLSv1.0 because of POODLE and BEAST using CBC cipher
// Can't use TLSv1.1 because of RC4 cipher usage
MinVersion: tls.VersionTLS12,
},
CertFile: kc.TLSCertFile,
KeyFile: kc.TLSPrivateKeyFile,
}
if len(kc.Authentication.X509.ClientCAFile) > 0 {
clientCAs, err := cert.NewPool(kc.Authentication.X509.ClientCAFile)
if err != nil {
return nil, fmt.Errorf("unable to load client CA file %s: %v", kc.Authentication.X509.ClientCAFile, err)
}
// Specify allowed CAs for client certificates
tlsOptions.Config.ClientCAs = clientCAs
// Populate PeerCertificates in requests, but don't reject connections without verified certificates
tlsOptions.Config.ClientAuth = tls.RequestClientCert
}
return tlsOptions, nil
}
func (o CreateNodeConfigOptions) Validate(args []string) error {
if len(args) != 0 {
return errors.New("no arguments are supported")
}
if len(o.NodeConfigDir) == 0 {
return errors.New("--node-dir must be provided")
}
if len(o.NodeName) == 0 {
return errors.New("--node must be provided")
}
if len(o.APIServerURL) == 0 {
return errors.New("--master must be provided")
}
if len(o.APIServerCAFiles) == 0 {
return fmt.Errorf("--certificate-authority must be a valid certificate file")
} else {
for _, caFile := range o.APIServerCAFiles {
if _, err := cert.NewPool(caFile); err != nil {
return fmt.Errorf("--certificate-authority must be a valid certificate file: %v", err)
}
}
}
if len(o.Hostnames) == 0 {
return errors.New("at least one hostname must be provided")
}
if len(o.ClientCertFile) != 0 {
if len(o.ClientKeyFile) == 0 {
return errors.New("--client-key must be provided if --client-certificate is provided")
}
} else if len(o.ClientKeyFile) != 0 {
return errors.New("--client-certificate must be provided if --client-key is provided")
}
if len(o.ServerCertFile) != 0 {
if len(o.ServerKeyFile) == 0 {
return errors.New("--server-key must be provided if --server-certificate is provided")
}
} else if len(o.ServerKeyFile) != 0 {
return errors.New("--server-certificate must be provided if --server-key is provided")
}
if o.IsCreateClientCertificate() || o.IsCreateServerCertificate() {
if len(o.SignerCertOptions.KeyFile) == 0 {
return errors.New("--signer-key must be provided to create certificates")
}
if len(o.SignerCertOptions.CertFile) == 0 {
return errors.New("--signer-cert must be provided to create certificates")
}
if len(o.SignerCertOptions.SerialFile) == 0 {
return errors.New("--signer-serial must be provided to create certificates")
}
}
if o.ExpireDays < 0 {
return errors.New("expire-days must be valid number of days")
}
return nil
}
func (o CreateKubeConfigOptions) Validate(args []string) error {
if len(args) != 0 {
return errors.New("no arguments are supported")
}
if len(o.KubeConfigFile) == 0 {
return errors.New("kubeconfig must be provided")
}
if len(o.CertFile) == 0 {
return errors.New("client-certificate must be provided")
}
if len(o.KeyFile) == 0 {
return errors.New("client-key must be provided")
}
if len(o.APIServerCAFiles) == 0 {
return errors.New("certificate-authority must be provided")
} else {
for _, caFile := range o.APIServerCAFiles {
if _, err := cert.NewPool(caFile); err != nil {
return fmt.Errorf("certificate-authority must be a valid certificate file: %v", err)
}
}
}
if len(o.ContextNamespace) == 0 {
return errors.New("namespace must be provided")
}
if len(o.APIServerURL) == 0 {
return errors.New("master must be provided")
}
return nil
}
// newAuthenticatorFromClientCAFile returns an authenticator.Request or an error
func newAuthenticatorFromClientCAFile(clientCAFile string) (authenticator.Request, error) {
roots, err := certutil.NewPool(clientCAFile)
if err != nil {
return nil, err
}
opts := x509.DefaultVerifyOptions()
opts.Roots = roots
return x509.New(opts, x509.CommonNameUserConversion), nil
}
// serveSecurely runs the secure http server. It fails only if certificates cannot
// be loaded or the initial listen call fails. The actual server loop (stoppable by closing
// stopCh) runs in a go routine, i.e. serveSecurely does not block.
func (s *GenericAPIServer) serveSecurely(stopCh <-chan struct{}) error {
namedCerts, err := getNamedCertificateMap(s.SecureServingInfo.SNICerts)
if err != nil {
return fmt.Errorf("unable to load SNI certificates: %v", err)
}
secureServer := &http.Server{
Addr: s.SecureServingInfo.BindAddress,
Handler: s.Handler,
MaxHeaderBytes: 1 << 20,
TLSConfig: &tls.Config{
NameToCertificate: namedCerts,
// Can't use SSLv3 because of POODLE and BEAST
// Can't use TLSv1.0 because of POODLE and BEAST using CBC cipher
// Can't use TLSv1.1 because of RC4 cipher usage
MinVersion: tls.VersionTLS12,
// enable HTTP2 for go's 1.7 HTTP Server
NextProtos: []string{"h2", "http/1.1"},
},
}
if len(s.SecureServingInfo.ServerCert.CertFile) != 0 || len(s.SecureServingInfo.ServerCert.KeyFile) != 0 {
secureServer.TLSConfig.Certificates = make([]tls.Certificate, 1)
secureServer.TLSConfig.Certificates[0], err = tls.LoadX509KeyPair(s.SecureServingInfo.ServerCert.CertFile, s.SecureServingInfo.ServerCert.KeyFile)
if err != nil {
return fmt.Errorf("unable to load server certificate: %v", err)
}
}
// append all named certs. Otherwise, the go tls stack will think no SNI processing
// is necessary because there is only one cert anyway.
// Moreover, if ServerCert.CertFile/ServerCert.KeyFile are not set, the first SNI
// cert will become the default cert. That's what we expect anyway.
for _, c := range namedCerts {
secureServer.TLSConfig.Certificates = append(secureServer.TLSConfig.Certificates, *c)
}
if len(s.SecureServingInfo.ClientCA) > 0 {
clientCAs, err := certutil.NewPool(s.SecureServingInfo.ClientCA)
if err != nil {
return fmt.Errorf("unable to load client CA file: %v", err)
}
// 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
secureServer.TLSConfig.ClientAuth = tls.RequestClientCert
// Specify allowed CAs for client certificates
secureServer.TLSConfig.ClientCAs = clientCAs
}
glog.Infof("Serving securely on %s", s.SecureServingInfo.BindAddress)
s.effectiveSecurePort, err = runServer(secureServer, stopCh)
return err
}
// New creates a token authenticator which validates OpenID Connect ID Tokens.
func New(opts OIDCOptions) (*OIDCAuthenticator, error) {
url, err := url.Parse(opts.IssuerURL)
if err != nil {
return nil, err
}
if url.Scheme != "https" {
return nil, fmt.Errorf("'oidc-issuer-url' (%q) has invalid scheme (%q), require 'https'", opts.IssuerURL, url.Scheme)
}
if opts.UsernameClaim == "" {
return nil, errors.New("no username claim provided")
}
var roots *x509.CertPool
if opts.CAFile != "" {
roots, err = certutil.NewPool(opts.CAFile)
if err != nil {
return nil, fmt.Errorf("Failed to read the CA file: %v", err)
}
} else {
glog.Info("OIDC: No x509 certificates provided, will use host's root CA set")
}
// Copied from http.DefaultTransport.
tr := net.SetTransportDefaults(&http.Transport{
// According to golang's doc, if RootCAs is nil,
// TLS uses the host's root CA set.
TLSClientConfig: &tls.Config{RootCAs: roots},
})
authenticator := &OIDCAuthenticator{
issuerURL: opts.IssuerURL,
trustedClientID: opts.ClientID,
usernameClaim: opts.UsernameClaim,
groupsClaim: opts.GroupsClaim,
httpClient: &http.Client{Transport: tr},
}
// Attempt to initialize the authenticator asynchronously.
//
// Ignore errors instead of returning it since the OpenID Connect provider might not be
// available yet, for instance if it's running on the cluster and needs the API server
// to come up first. Errors will be logged within the client() method.
go func() {
defer runtime.HandleCrash()
authenticator.client()
}()
return authenticator, nil
}
func (o CreateMasterCertsOptions) Validate(args []string) error {
if len(args) != 0 {
return errors.New("no arguments are supported")
}
if len(o.Hostnames) == 0 {
return errors.New("at least one hostname must be provided")
}
if len(o.CertDir) == 0 {
return errors.New("cert-dir must be provided")
}
if len(o.SignerName) == 0 {
return errors.New("signer-name must be provided")
}
if o.ExpireDays <= 0 {
return errors.New("expire-days must be valid number of days")
}
if o.SignerExpireDays <= 0 {
return errors.New("signer-expire-days must be valid number of days")
}
if len(o.APIServerURL) == 0 {
return errors.New("master must be provided")
} else if u, err := url.Parse(o.APIServerURL); err != nil {
return errors.New("master must be a valid URL (e.g. https://10.0.0.1:8443)")
} else if len(u.Scheme) == 0 {
return errors.New("master must be a valid URL (e.g. https://10.0.0.1:8443)")
}
if len(o.PublicAPIServerURL) == 0 {
// not required
} else if u, err := url.Parse(o.PublicAPIServerURL); err != nil {
return errors.New("public master must be a valid URL (e.g. https://example.com:8443)")
} else if len(u.Scheme) == 0 {
return errors.New("public master must be a valid URL (e.g. https://example.com:8443)")
}
for _, caFile := range o.APIServerCAFiles {
if _, err := cert.NewPool(caFile); err != nil {
return fmt.Errorf("certificate authority must be a valid certificate file: %v", err)
}
}
return nil
}
// NewKeystoneAuthenticator returns a password authenticator that validates credentials using openstack keystone
func NewKeystoneAuthenticator(authURL string, caFile string) (*KeystoneAuthenticator, error) {
if !strings.HasPrefix(authURL, "https") {
return nil, errors.New("Auth URL should be secure and start with https")
}
if authURL == "" {
return nil, errors.New("Auth URL is empty")
}
if caFile != "" {
roots, err := certutil.NewPool(caFile)
if err != nil {
return nil, err
}
config := &tls.Config{}
config.RootCAs = roots
transport := netutil.SetOldTransportDefaults(&http.Transport{TLSClientConfig: config})
return &KeystoneAuthenticator{authURL, transport}, nil
}
return &KeystoneAuthenticator{authURL: authURL}, nil
}
func buildAuthn(client authenticationclient.TokenReviewInterface, authn componentconfig.KubeletAuthentication) (authenticator.Request, error) {
authenticators := []authenticator.Request{}
// x509 client cert auth
if len(authn.X509.ClientCAFile) > 0 {
clientCAs, err := cert.NewPool(authn.X509.ClientCAFile)
if err != nil {
return nil, fmt.Errorf("unable to load client CA file %s: %v", authn.X509.ClientCAFile, err)
}
verifyOpts := x509.DefaultVerifyOptions()
verifyOpts.Roots = clientCAs
authenticators = append(authenticators, x509.New(verifyOpts, x509.CommonNameUserConversion))
}
// bearer token auth that uses authentication.k8s.io TokenReview to determine userinfo
if authn.Webhook.Enabled {
if client == nil {
return nil, errors.New("no client provided, cannot use webhook authentication")
}
tokenAuth, err := webhooktoken.NewFromInterface(client, authn.Webhook.CacheTTL.Duration)
if err != nil {
return nil, err
}
authenticators = append(authenticators, bearertoken.New(tokenAuth))
}
if len(authenticators) == 0 {
if authn.Anonymous.Enabled {
return anonymous.NewAuthenticator(), nil
}
return nil, errors.New("No authentication method configured")
}
authenticator := group.NewGroupAdder(unionauth.New(authenticators...), []string{"system:authenticated"})
if authn.Anonymous.Enabled {
authenticator = unionauth.NewFailOnError(authenticator, anonymous.NewAuthenticator())
}
return authenticator, nil
}
func (s *GenericAPIServer) Run(options *options.ServerRunOptions) {
// install APIs which depend on other APIs to be installed
if s.enableSwaggerSupport {
s.InstallSwaggerAPI()
}
if s.enableOpenAPISupport {
s.InstallOpenAPI()
}
secureStartedCh := make(chan struct{})
if options.SecurePort != 0 {
secureLocation := net.JoinHostPort(options.BindAddress.String(), strconv.Itoa(options.SecurePort))
secureServer := &http.Server{
Addr: secureLocation,
Handler: s.Handler,
MaxHeaderBytes: 1 << 20,
TLSConfig: &tls.Config{
// Can't use SSLv3 because of POODLE and BEAST
// Can't use TLSv1.0 because of POODLE and BEAST using CBC cipher
// Can't use TLSv1.1 because of RC4 cipher usage
MinVersion: tls.VersionTLS12,
},
}
if len(options.ClientCAFile) > 0 {
clientCAs, err := certutil.NewPool(options.ClientCAFile)
if err != nil {
glog.Fatalf("Unable to load client CA file: %v", err)
}
// 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
secureServer.TLSConfig.ClientAuth = tls.RequestClientCert
// Specify allowed CAs for client certificates
secureServer.TLSConfig.ClientCAs = clientCAs
// "h2" NextProtos is necessary for enabling HTTP2 for go's 1.7 HTTP Server
secureServer.TLSConfig.NextProtos = []string{"h2"}
}
glog.Infof("Serving securely on %s", secureLocation)
if options.TLSCertFile == "" && options.TLSPrivateKeyFile == "" {
options.TLSCertFile = path.Join(options.CertDirectory, "apiserver.crt")
options.TLSPrivateKeyFile = path.Join(options.CertDirectory, "apiserver.key")
// TODO (cjcullen): Is ClusterIP the right address to sign a cert with?
alternateIPs := []net.IP{s.ServiceReadWriteIP}
alternateDNS := []string{"kubernetes.default.svc", "kubernetes.default", "kubernetes", "localhost"}
// It would be nice to set a fqdn subject alt name, but only the kubelets know, the apiserver is clueless
// alternateDNS = append(alternateDNS, "kubernetes.default.svc.CLUSTER.DNS.NAME")
if !certutil.CanReadCertOrKey(options.TLSCertFile, options.TLSPrivateKeyFile) {
if err := certutil.GenerateSelfSignedCert(s.ClusterIP.String(), options.TLSCertFile, options.TLSPrivateKeyFile, alternateIPs, alternateDNS); err != nil {
glog.Errorf("Unable to generate self signed cert: %v", err)
} else {
glog.Infof("Using self-signed cert (%s, %s)", options.TLSCertFile, options.TLSPrivateKeyFile)
}
}
}
go func() {
defer utilruntime.HandleCrash()
notifyStarted := sync.Once{}
for {
if err := secureServer.ListenAndServeTLS(options.TLSCertFile, options.TLSPrivateKeyFile); err != nil {
glog.Errorf("Unable to listen for secure (%v); will try again.", err)
} else {
notifyStarted.Do(func() {
close(secureStartedCh)
})
}
time.Sleep(15 * time.Second)
}
}()
} else {
close(secureStartedCh)
}
insecureLocation := net.JoinHostPort(options.InsecureBindAddress.String(), strconv.Itoa(options.InsecurePort))
insecureServer := &http.Server{
Addr: insecureLocation,
Handler: s.InsecureHandler,
MaxHeaderBytes: 1 << 20,
}
insecureStartedCh := make(chan struct{})
glog.Infof("Serving insecurely on %s", insecureLocation)
go func() {
defer utilruntime.HandleCrash()
notifyStarted := sync.Once{}
for {
if err := insecureServer.ListenAndServe(); err != nil {
glog.Errorf("Unable to listen for insecure (%v); will try again.", err)
} else {
notifyStarted.Do(func() {
close(insecureStartedCh)
})
}
time.Sleep(15 * time.Second)
}
}()
<-secureStartedCh
<-insecureStartedCh
s.RunPostStartHooks(PostStartHookContext{})
// err == systemd.SdNotifyNoSocket when not running on a systemd system
if err := systemd.SdNotify("READY=1\n"); err != nil && err != systemd.SdNotifyNoSocket {
glog.Errorf("Unable to send systemd daemon successful start message: %v\n", err)
}
select {}
}
func (s *GenericAPIServer) Run() {
// install APIs which depend on other APIs to be installed
if s.enableSwaggerSupport {
s.InstallSwaggerAPI()
}
if s.enableOpenAPISupport {
s.InstallOpenAPI()
}
if s.SecureServingInfo != nil {
secureServer := &http.Server{
Addr: s.SecureServingInfo.BindAddress,
Handler: s.Handler,
MaxHeaderBytes: 1 << 20,
TLSConfig: &tls.Config{
// Can't use SSLv3 because of POODLE and BEAST
// Can't use TLSv1.0 because of POODLE and BEAST using CBC cipher
// Can't use TLSv1.1 because of RC4 cipher usage
MinVersion: tls.VersionTLS12,
},
}
if len(s.SecureServingInfo.ClientCA) > 0 {
clientCAs, err := certutil.NewPool(s.SecureServingInfo.ClientCA)
if err != nil {
glog.Fatalf("Unable to load client CA file: %v", err)
}
// 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
secureServer.TLSConfig.ClientAuth = tls.RequestClientCert
// Specify allowed CAs for client certificates
secureServer.TLSConfig.ClientCAs = clientCAs
// "h2" NextProtos is necessary for enabling HTTP2 for go's 1.7 HTTP Server
secureServer.TLSConfig.NextProtos = []string{"h2"}
}
// It would be nice to set a fqdn subject alt name, but only the kubelets know, the apiserver is clueless
// alternateDNS = append(alternateDNS, "kubernetes.default.svc.CLUSTER.DNS.NAME")
if s.SecureServingInfo.ServerCert.Generate && !certutil.CanReadCertOrKey(s.SecureServingInfo.ServerCert.CertFile, s.SecureServingInfo.ServerCert.KeyFile) {
// TODO (cjcullen): Is ClusterIP the right address to sign a cert with?
alternateIPs := []net.IP{s.ServiceReadWriteIP}
alternateDNS := []string{"kubernetes.default.svc", "kubernetes.default", "kubernetes", "localhost"}
if err := certutil.GenerateSelfSignedCert(s.ClusterIP.String(), s.SecureServingInfo.ServerCert.CertFile, s.SecureServingInfo.ServerCert.KeyFile, alternateIPs, alternateDNS); err != nil {
glog.Errorf("Unable to generate self signed cert: %v", err)
} else {
glog.Infof("Using self-signed cert (%s, %s)", s.SecureServingInfo.ServerCert.CertFile, s.SecureServingInfo.ServerCert.KeyFile)
}
}
glog.Infof("Serving securely on %s", s.SecureServingInfo.BindAddress)
go func() {
defer utilruntime.HandleCrash()
for {
if err := secureServer.ListenAndServeTLS(s.SecureServingInfo.ServerCert.CertFile, s.SecureServingInfo.ServerCert.KeyFile); err != nil {
glog.Errorf("Unable to listen for secure (%v); will try again.", err)
}
time.Sleep(15 * time.Second)
}
}()
}
if s.InsecureServingInfo != nil {
insecureServer := &http.Server{
Addr: s.InsecureServingInfo.BindAddress,
Handler: s.InsecureHandler,
MaxHeaderBytes: 1 << 20,
}
glog.Infof("Serving insecurely on %s", s.InsecureServingInfo.BindAddress)
go func() {
defer utilruntime.HandleCrash()
for {
if err := insecureServer.ListenAndServe(); err != nil {
glog.Errorf("Unable to listen for insecure (%v); will try again.", err)
}
time.Sleep(15 * time.Second)
}
}()
}
// Attempt to verify the server came up for 20 seconds (100 tries * 100ms, 100ms timeout per try) per port
if s.SecureServingInfo != nil {
if err := waitForSuccessfulDial(true, "tcp", s.SecureServingInfo.BindAddress, 100*time.Millisecond, 100*time.Millisecond, 100); err != nil {
glog.Fatalf("Secure server never started: %v", err)
}
}
if s.InsecureServingInfo != nil {
if err := waitForSuccessfulDial(false, "tcp", s.InsecureServingInfo.BindAddress, 100*time.Millisecond, 100*time.Millisecond, 100); err != nil {
glog.Fatalf("Insecure server never started: %v", err)
}
}
s.RunPostStartHooks()
// err == systemd.SdNotifyNoSocket when not running on a systemd system
if err := systemd.SdNotify("READY=1\n"); err != nil && err != systemd.SdNotifyNoSocket {
glog.Errorf("Unable to send systemd daemon successful start message: %v\n", err)
}
select {}
}
func (s *GenericAPIServer) Run() {
// install APIs which depend on other APIs to be installed
if s.enableSwaggerSupport {
s.InstallSwaggerAPI()
}
if s.enableOpenAPISupport {
s.InstallOpenAPI()
}
if s.SecureServingInfo != nil && s.Handler != nil {
secureServer := &http.Server{
Addr: s.SecureServingInfo.BindAddress,
Handler: s.Handler,
MaxHeaderBytes: 1 << 20,
TLSConfig: &tls.Config{
// Can't use SSLv3 because of POODLE and BEAST
// Can't use TLSv1.0 because of POODLE and BEAST using CBC cipher
// Can't use TLSv1.1 because of RC4 cipher usage
MinVersion: tls.VersionTLS12,
},
}
if len(s.SecureServingInfo.ClientCA) > 0 {
clientCAs, err := certutil.NewPool(s.SecureServingInfo.ClientCA)
if err != nil {
glog.Fatalf("Unable to load client CA file: %v", err)
}
// 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
secureServer.TLSConfig.ClientAuth = tls.RequestClientCert
// Specify allowed CAs for client certificates
secureServer.TLSConfig.ClientCAs = clientCAs
// "h2" NextProtos is necessary for enabling HTTP2 for go's 1.7 HTTP Server
secureServer.TLSConfig.NextProtos = []string{"h2"}
}
glog.Infof("Serving securely on %s", s.SecureServingInfo.BindAddress)
go func() {
defer utilruntime.HandleCrash()
for {
if err := secureServer.ListenAndServeTLS(s.SecureServingInfo.ServerCert.CertFile, s.SecureServingInfo.ServerCert.KeyFile); err != nil {
glog.Errorf("Unable to listen for secure (%v); will try again.", err)
}
time.Sleep(15 * time.Second)
}
}()
}
if s.InsecureServingInfo != nil && s.InsecureHandler != nil {
insecureServer := &http.Server{
Addr: s.InsecureServingInfo.BindAddress,
Handler: s.InsecureHandler,
MaxHeaderBytes: 1 << 20,
}
glog.Infof("Serving insecurely on %s", s.InsecureServingInfo.BindAddress)
go func() {
defer utilruntime.HandleCrash()
for {
if err := insecureServer.ListenAndServe(); err != nil {
glog.Errorf("Unable to listen for insecure (%v); will try again.", err)
}
time.Sleep(15 * time.Second)
}
}()
}
// Attempt to verify the server came up for 20 seconds (100 tries * 100ms, 100ms timeout per try) per port
if s.SecureServingInfo != nil {
if err := waitForSuccessfulDial(true, "tcp", s.SecureServingInfo.BindAddress, 100*time.Millisecond, 100*time.Millisecond, 100); err != nil {
glog.Fatalf("Secure server never started: %v", err)
}
}
if s.InsecureServingInfo != nil {
if err := waitForSuccessfulDial(false, "tcp", s.InsecureServingInfo.BindAddress, 100*time.Millisecond, 100*time.Millisecond, 100); err != nil {
glog.Fatalf("Insecure server never started: %v", err)
}
}
s.RunPostStartHooks()
// err == systemd.SdNotifyNoSocket when not running on a systemd system
if err := systemd.SdNotify("READY=1\n"); err != nil && err != systemd.SdNotifyNoSocket {
glog.Errorf("Unable to send systemd daemon successful start message: %v\n", err)
}
select {}
}
func (c DelegatingAuthenticatorConfig) New() (authenticator.Request, *spec.SecurityDefinitions, error) {
authenticators := []authenticator.Request{}
securityDefinitions := spec.SecurityDefinitions{}
// front-proxy first, then remote
// Add the front proxy authenticator if requested
if c.RequestHeaderConfig != nil {
requestHeaderAuthenticator, err := headerrequest.NewSecure(
c.RequestHeaderConfig.ClientCA,
c.RequestHeaderConfig.AllowedClientNames,
c.RequestHeaderConfig.UsernameHeaders,
c.RequestHeaderConfig.GroupHeaders,
c.RequestHeaderConfig.ExtraHeaderPrefixes,
)
if err != nil {
return nil, nil, err
}
authenticators = append(authenticators, requestHeaderAuthenticator)
}
// x509 client cert auth
if len(c.ClientCAFile) > 0 {
clientCAs, err := cert.NewPool(c.ClientCAFile)
if err != nil {
return nil, nil, fmt.Errorf("unable to load client CA file %s: %v", c.ClientCAFile, err)
}
verifyOpts := x509.DefaultVerifyOptions()
verifyOpts.Roots = clientCAs
authenticators = append(authenticators, x509.New(verifyOpts, x509.CommonNameUserConversion))
}
if c.TokenAccessReviewClient != nil {
tokenAuth, err := webhooktoken.NewFromInterface(c.TokenAccessReviewClient, c.CacheTTL)
if err != nil {
return nil, nil, err
}
authenticators = append(authenticators, bearertoken.New(tokenAuth))
securityDefinitions["BearerToken"] = &spec.SecurityScheme{
SecuritySchemeProps: spec.SecuritySchemeProps{
Type: "apiKey",
Name: "authorization",
In: "header",
Description: "Bearer Token authentication",
},
}
}
if len(authenticators) == 0 {
if c.Anonymous {
return anonymous.NewAuthenticator(), &securityDefinitions, nil
}
return nil, nil, errors.New("No authentication method configured")
}
authenticator := group.NewGroupAdder(unionauth.New(authenticators...), []string{user.AllAuthenticated})
if c.Anonymous {
authenticator = unionauth.NewFailOnError(authenticator, anonymous.NewAuthenticator())
}
return authenticator, &securityDefinitions, nil
}