func BuildKubernetesMasterConfig(options configapi.MasterConfig, requestContextMapper kapi.RequestContextMapper, kubeClient *kclient.Client, pluginInitializer oadmission.PluginInitializer) (*MasterConfig, error) {
if options.KubernetesMasterConfig == nil {
return nil, errors.New("insufficient information to build KubernetesMasterConfig")
}
// Connect and setup etcd interfaces
etcdClient, err := etcd.MakeNewEtcdClient(options.EtcdClientInfo)
if err != nil {
return nil, err
}
kubeletClientConfig := configapi.GetKubeletClientConfig(options)
kubeletClient, err := kubeletclient.NewStaticKubeletClient(kubeletClientConfig)
if err != nil {
return nil, fmt.Errorf("unable to configure Kubelet client: %v", err)
}
// in-order list of plug-ins that should intercept admission decisions
// TODO: Push node environment support to upstream in future
_, portString, err := net.SplitHostPort(options.ServingInfo.BindAddress)
if err != nil {
return nil, err
}
port, err := strconv.Atoi(portString)
if err != nil {
return nil, err
}
portRange, err := knet.ParsePortRange(options.KubernetesMasterConfig.ServicesNodePortRange)
if err != nil {
return nil, err
}
podEvictionTimeout, err := time.ParseDuration(options.KubernetesMasterConfig.PodEvictionTimeout)
if err != nil {
return nil, fmt.Errorf("unable to parse PodEvictionTimeout: %v", err)
}
// Defaults are tested in TestAPIServerDefaults
server := apiserveroptions.NewAPIServer()
// Adjust defaults
server.EventTTL = 2 * time.Hour
server.ServiceClusterIPRange = net.IPNet(flagtypes.DefaultIPNet(options.KubernetesMasterConfig.ServicesSubnet))
server.ServiceNodePortRange = *portRange
server.AdmissionControl = strings.Join(AdmissionPlugins, ",")
server.EnableLogsSupport = false // don't expose server logs
server.EnableProfiling = false
server.APIPrefix = KubeAPIPrefix
server.APIGroupPrefix = KubeAPIGroupPrefix
server.SecurePort = port
server.MasterCount = options.KubernetesMasterConfig.MasterCount
// 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.KubernetesMasterConfig.APIServerArguments, server.AddFlags); len(err) > 0 {
return nil, kerrors.NewAggregate(err)
}
if len(options.KubernetesMasterConfig.AdmissionConfig.PluginOrderOverride) > 0 {
server.AdmissionControl = strings.Join(options.KubernetesMasterConfig.AdmissionConfig.PluginOrderOverride, ",")
}
// Defaults are tested in TestCMServerDefaults
cmserver := cmapp.NewCMServer()
// Adjust defaults
cmserver.Address = "" // no healthz endpoint
cmserver.Port = 0 // no healthz endpoint
cmserver.PodEvictionTimeout = unversioned.Duration{Duration: podEvictionTimeout}
// 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.KubernetesMasterConfig.ControllerArguments, cmserver.AddFlags); len(err) > 0 {
return nil, kerrors.NewAggregate(err)
}
cloud, err := cloudprovider.InitCloudProvider(cmserver.CloudProvider, cmserver.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)
}
plugins := []admission.Interface{}
for _, pluginName := range strings.Split(server.AdmissionControl, ",") {
switch pluginName {
case lifecycle.PluginName:
// We need to include our infrastructure and shared resource namespaces in the immortal namespaces list
immortalNamespaces := sets.NewString(kapi.NamespaceDefault)
if len(options.PolicyConfig.OpenShiftSharedResourcesNamespace) > 0 {
immortalNamespaces.Insert(options.PolicyConfig.OpenShiftSharedResourcesNamespace)
}
if len(options.PolicyConfig.OpenShiftInfrastructureNamespace) > 0 {
immortalNamespaces.Insert(options.PolicyConfig.OpenShiftInfrastructureNamespace)
}
plugins = append(plugins, lifecycle.NewLifecycle(internalclientset.FromUnversionedClient(kubeClient), immortalNamespaces))
case serviceadmit.ExternalIPPluginName:
// this needs to be moved upstream to be part of core config
reject, admit, err := serviceadmit.ParseCIDRRules(options.NetworkConfig.ExternalIPNetworkCIDRs)
if err != nil {
// should have been caught with validation
return nil, err
}
plugins = append(plugins, serviceadmit.NewExternalIPRanger(reject, admit))
case saadmit.PluginName:
// we need to set some custom parameters on the service account admission controller, so create that one by hand
saAdmitter := saadmit.NewServiceAccount(internalclientset.FromUnversionedClient(kubeClient))
saAdmitter.LimitSecretReferences = options.ServiceAccountConfig.LimitSecretReferences
saAdmitter.Run()
plugins = append(plugins, saAdmitter)
default:
configFile, err := pluginconfig.GetPluginConfigFile(options.KubernetesMasterConfig.AdmissionConfig.PluginConfig, pluginName, server.AdmissionControlConfigFile)
if err != nil {
return nil, err
}
plugin := admission.InitPlugin(pluginName, internalclientset.FromUnversionedClient(kubeClient), configFile)
if plugin != nil {
plugins = append(plugins, plugin)
}
}
}
pluginInitializer.Initialize(plugins)
// ensure that plugins have been properly initialized
if err := oadmission.Validate(plugins); err != nil {
return nil, err
}
admissionController := admission.NewChainHandler(plugins...)
var proxyClientCerts []tls.Certificate
if len(options.KubernetesMasterConfig.ProxyClientInfo.CertFile) > 0 {
clientCert, err := tls.LoadX509KeyPair(
options.KubernetesMasterConfig.ProxyClientInfo.CertFile,
options.KubernetesMasterConfig.ProxyClientInfo.KeyFile,
)
if err != nil {
return nil, err
}
proxyClientCerts = append(proxyClientCerts, clientCert)
}
// TODO you have to know every APIGroup you're enabling or upstream will panic. Its alternative to panicing is Fataling
// It needs a refactor to return errors
storageDestinations := genericapiserver.NewStorageDestinations()
// storageVersions is a map from API group to allowed versions that must be a version exposed by the REST API or it breaks.
// We need to fix the upstream to stop using the storage version as a preferred api version.
storageVersions := map[string]string{}
enabledKubeVersions := configapi.GetEnabledAPIVersionsForGroup(*options.KubernetesMasterConfig, configapi.APIGroupKube)
if len(enabledKubeVersions) > 0 {
kubeStorageVersion := unversioned.GroupVersion{Group: configapi.APIGroupKube, Version: options.EtcdStorageConfig.KubernetesStorageVersion}
databaseStorage, err := NewEtcdStorage(etcdClient, kubeStorageVersion, options.EtcdStorageConfig.KubernetesStoragePrefix)
if err != nil {
return nil, fmt.Errorf("Error setting up Kubernetes server storage: %v", err)
}
storageDestinations.AddAPIGroup(configapi.APIGroupKube, databaseStorage)
storageVersions[configapi.APIGroupKube] = options.EtcdStorageConfig.KubernetesStorageVersion
}
// enable this if extensions API is enabled (or batch or autoscaling, since they persist to extensions/v1beta1 for now)
// TODO: replace this with a loop over configured storage versions
extensionsEnabled := len(configapi.GetEnabledAPIVersionsForGroup(*options.KubernetesMasterConfig, configapi.APIGroupExtensions)) > 0
batchEnabled := len(configapi.GetEnabledAPIVersionsForGroup(*options.KubernetesMasterConfig, configapi.APIGroupBatch)) > 0
autoscalingEnabled := len(configapi.GetEnabledAPIVersionsForGroup(*options.KubernetesMasterConfig, configapi.APIGroupAutoscaling)) > 0
if extensionsEnabled || autoscalingEnabled || batchEnabled {
// TODO: replace this with a configured storage version for extensions once configuration exposes this
extensionsStorageVersion := unversioned.GroupVersion{Group: extensions.GroupName, Version: "v1beta1"}
databaseStorage, err := NewEtcdStorage(etcdClient, extensionsStorageVersion, options.EtcdStorageConfig.KubernetesStoragePrefix)
if err != nil {
return nil, fmt.Errorf("Error setting up Kubernetes extensions server storage: %v", err)
}
storageDestinations.AddAPIGroup(configapi.APIGroupExtensions, databaseStorage)
storageVersions[configapi.APIGroupExtensions] = extensionsStorageVersion.String()
}
// Preserve previous behavior of using the first non-loopback address
// TODO: Deprecate this behavior and just require a valid value to be passed in
publicAddress := net.ParseIP(options.KubernetesMasterConfig.MasterIP)
if publicAddress == nil || publicAddress.IsUnspecified() || publicAddress.IsLoopback() {
hostIP, err := knet.ChooseHostInterface()
if err != nil {
glog.Fatalf("Unable to find suitable network address.error='%v'. Set the masterIP directly to avoid this error.", err)
}
publicAddress = hostIP
glog.Infof("Will report %v as public IP address.", publicAddress)
}
m := &master.Config{
Config: &genericapiserver.Config{
PublicAddress: publicAddress,
ReadWritePort: port,
Authorizer: apiserver.NewAlwaysAllowAuthorizer(),
AdmissionControl: admissionController,
StorageDestinations: storageDestinations,
StorageVersions: storageVersions,
ServiceClusterIPRange: (*net.IPNet)(&server.ServiceClusterIPRange),
ServiceNodePortRange: server.ServiceNodePortRange,
RequestContextMapper: requestContextMapper,
APIGroupVersionOverrides: getAPIGroupVersionOverrides(options),
APIPrefix: server.APIPrefix,
APIGroupPrefix: server.APIGroupPrefix,
MasterCount: server.MasterCount,
// Set the TLS options for proxying to pods and services
// Proxying to nodes uses the kubeletClient TLS config (so can provide a different cert, and verify the node hostname)
ProxyTLSClientConfig: &tls.Config{
// Proxying to pods and services cannot verify hostnames, since they are contacted on randomly allocated IPs
InsecureSkipVerify: true,
Certificates: proxyClientCerts,
},
Serializer: kapi.Codecs,
EnableLogsSupport: server.EnableLogsSupport,
EnableProfiling: server.EnableProfiling,
EnableWatchCache: server.EnableWatchCache,
MasterServiceNamespace: server.MasterServiceNamespace,
ExternalHost: server.ExternalHost,
MinRequestTimeout: server.MinRequestTimeout,
KubernetesServiceNodePort: server.KubernetesServiceNodePort,
},
EventTTL: server.EventTTL,
KubeletClient: kubeletClient,
EnableCoreControllers: true,
DeleteCollectionWorkers: server.DeleteCollectionWorkers,
}
if server.EnableWatchCache {
cachesize.SetWatchCacheSizes(server.WatchCacheSizes)
}
if options.DNSConfig != nil {
_, dnsPortStr, err := net.SplitHostPort(options.DNSConfig.BindAddress)
if err != nil {
return nil, fmt.Errorf("unable to parse DNS bind address %s: %v", options.DNSConfig.BindAddress, err)
}
dnsPort, err := strconv.Atoi(dnsPortStr)
if err != nil {
return nil, fmt.Errorf("invalid DNS port: %v", err)
}
m.ExtraServicePorts = append(m.ExtraServicePorts,
kapi.ServicePort{Name: "dns", Port: 53, Protocol: kapi.ProtocolUDP, TargetPort: intstr.FromInt(dnsPort)},
kapi.ServicePort{Name: "dns-tcp", Port: 53, Protocol: kapi.ProtocolTCP, TargetPort: intstr.FromInt(dnsPort)},
)
m.ExtraEndpointPorts = append(m.ExtraEndpointPorts,
kapi.EndpointPort{Name: "dns", Port: dnsPort, Protocol: kapi.ProtocolUDP},
kapi.EndpointPort{Name: "dns-tcp", Port: dnsPort, Protocol: kapi.ProtocolTCP},
)
}
kmaster := &MasterConfig{
Options: *options.KubernetesMasterConfig,
KubeClient: kubeClient,
Master: m,
ControllerManager: cmserver,
CloudProvider: cloud,
}
return kmaster, nil
}
func newAdmissionChain(pluginNames []string, admissionConfigFilename string, pluginConfig map[string]configapi.AdmissionPluginConfig, options configapi.MasterConfig, kubeClientSet *internalclientset.Clientset, pluginInitializer oadmission.PluginInitializer) (admission.Interface, error) {
plugins := []admission.Interface{}
for _, pluginName := range pluginNames {
switch pluginName {
case lifecycle.PluginName:
// We need to include our infrastructure and shared resource namespaces in the immortal namespaces list
immortalNamespaces := sets.NewString(kapi.NamespaceDefault)
if len(options.PolicyConfig.OpenShiftSharedResourcesNamespace) > 0 {
immortalNamespaces.Insert(options.PolicyConfig.OpenShiftSharedResourcesNamespace)
}
if len(options.PolicyConfig.OpenShiftInfrastructureNamespace) > 0 {
immortalNamespaces.Insert(options.PolicyConfig.OpenShiftInfrastructureNamespace)
}
plugins = append(plugins, lifecycle.NewLifecycle(kubeClientSet, immortalNamespaces))
case serviceadmit.ExternalIPPluginName:
// this needs to be moved upstream to be part of core config
reject, admit, err := serviceadmit.ParseRejectAdmitCIDRRules(options.NetworkConfig.ExternalIPNetworkCIDRs)
if err != nil {
// should have been caught with validation
return nil, err
}
plugins = append(plugins, serviceadmit.NewExternalIPRanger(reject, admit))
case serviceadmit.RestrictedEndpointsPluginName:
// we need to set some customer parameters, so create by hand
restrictedNetworks, err := serviceadmit.ParseSimpleCIDRRules([]string{options.NetworkConfig.ClusterNetworkCIDR, options.NetworkConfig.ServiceNetworkCIDR})
if err != nil {
// should have been caught with validation
return nil, err
}
plugins = append(plugins, serviceadmit.NewRestrictedEndpointsAdmission(restrictedNetworks))
case saadmit.PluginName:
// we need to set some custom parameters on the service account admission controller, so create that one by hand
saAdmitter := saadmit.NewServiceAccount(kubeClientSet)
saAdmitter.LimitSecretReferences = options.ServiceAccountConfig.LimitSecretReferences
saAdmitter.Run()
plugins = append(plugins, saAdmitter)
default:
configFile, err := pluginconfig.GetPluginConfigFile(pluginConfig, pluginName, admissionConfigFilename)
if err != nil {
return nil, err
}
plugin := admission.InitPlugin(pluginName, kubeClientSet, configFile)
if plugin != nil {
plugins = append(plugins, plugin)
}
}
}
pluginInitializer.Initialize(plugins)
// ensure that plugins have been properly initialized
if err := oadmission.Validate(plugins); err != nil {
return nil, err
}
return admission.NewChainHandler(plugins...), nil
}