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helpers.go
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helpers.go
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package api
import (
"crypto/tls"
"crypto/x509"
"fmt"
"net"
"net/http"
"strings"
"time"
"k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/api/unversioned"
kclientset "k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset"
"k8s.io/kubernetes/pkg/client/restclient"
"k8s.io/kubernetes/pkg/client/unversioned/clientcmd"
kubeletclient "k8s.io/kubernetes/pkg/kubelet/client"
"k8s.io/kubernetes/pkg/runtime"
"k8s.io/kubernetes/pkg/util/sets"
"github.com/openshift/origin/pkg/client"
cmdutil "github.com/openshift/origin/pkg/cmd/util"
)
var (
// Maps lower-cased feature flag names and aliases to their canonical names.
knownOpenShiftFeatureSet map[string]string
)
func init() {
knownOpenShiftFeatureSet = make(map[string]string, len(KnownOpenShiftFeatures))
for _, feature := range KnownOpenShiftFeatures {
knownOpenShiftFeatureSet[strings.ToLower(feature)] = feature
}
for alias, feature := range FeatureAliases {
knownOpenShiftFeatureSet[strings.ToLower(alias)] = feature
}
}
// NormalizeOpenShiftFeature returns canonical name for given OpenShift feature
// flag or an alias if known. Otherwise lower-cased name is returned.
func NormalizeOpenShiftFeature(name string) (string, bool) {
name = strings.ToLower(name)
if feature, ok := knownOpenShiftFeatureSet[name]; ok {
return feature, true
}
return name, false
}
// Add extends feature list with given valid items. They are appended
// unless already present.
func (fl *FeatureList) Add(items ...string) error {
unknown := []string{}
toAppend := make([]string, 0, len(items))
for _, item := range items {
feature, known := NormalizeOpenShiftFeature(item)
if !known {
unknown = append(unknown, item)
continue
}
if fl.Has(feature) {
continue
}
toAppend = append(toAppend, feature)
}
if len(unknown) > 0 {
return fmt.Errorf("unknown features: %s", strings.Join(unknown, ", "))
}
*fl = append(*fl, toAppend...)
return nil
}
// Delete removes given items from feature list while keeping its original
// order.
func (fl *FeatureList) Delete(items ...string) {
toDelete := FeatureList(items)
newList := []string{}
for _, item := range *fl {
if !toDelete.Has(item) {
newList = append(newList, item)
}
}
*fl = newList
}
// Has returns true if given feature exists in feature list. The check is
// case-insensitive.
func (fl FeatureList) Has(feature string) bool {
normalized, _ := NormalizeOpenShiftFeature(feature)
for _, item := range fl {
itemNormalized, _ := NormalizeOpenShiftFeature(item)
if normalized == itemNormalized {
return true
}
}
return false
}
// ParseNamespaceAndName returns back the namespace and name (empty if something goes wrong), for a given string.
// This is useful when pointing to a particular resource inside of our config.
func ParseNamespaceAndName(in string) (string, string, error) {
if len(in) == 0 {
return "", "", nil
}
tokens := strings.Split(in, "/")
if len(tokens) != 2 {
return "", "", fmt.Errorf("expected input in the form <namespace>/<resource-name>, not: %v", in)
}
return tokens[0], tokens[1], nil
}
func RelativizeMasterConfigPaths(config *MasterConfig, base string) error {
return cmdutil.RelativizePathWithNoBacksteps(GetMasterFileReferences(config), base)
}
func ResolveMasterConfigPaths(config *MasterConfig, base string) error {
return cmdutil.ResolvePaths(GetMasterFileReferences(config), base)
}
func GetMasterFileReferences(config *MasterConfig) []*string {
refs := []*string{}
refs = append(refs, &config.ServingInfo.ServerCert.CertFile)
refs = append(refs, &config.ServingInfo.ServerCert.KeyFile)
refs = append(refs, &config.ServingInfo.ClientCA)
for i := range config.ServingInfo.NamedCertificates {
refs = append(refs, &config.ServingInfo.NamedCertificates[i].CertFile)
refs = append(refs, &config.ServingInfo.NamedCertificates[i].KeyFile)
}
refs = append(refs, &config.EtcdClientInfo.ClientCert.CertFile)
refs = append(refs, &config.EtcdClientInfo.ClientCert.KeyFile)
refs = append(refs, &config.EtcdClientInfo.CA)
refs = append(refs, &config.KubeletClientInfo.ClientCert.CertFile)
refs = append(refs, &config.KubeletClientInfo.ClientCert.KeyFile)
refs = append(refs, &config.KubeletClientInfo.CA)
if config.EtcdConfig != nil {
refs = append(refs, &config.EtcdConfig.ServingInfo.ServerCert.CertFile)
refs = append(refs, &config.EtcdConfig.ServingInfo.ServerCert.KeyFile)
refs = append(refs, &config.EtcdConfig.ServingInfo.ClientCA)
for i := range config.EtcdConfig.ServingInfo.NamedCertificates {
refs = append(refs, &config.EtcdConfig.ServingInfo.NamedCertificates[i].CertFile)
refs = append(refs, &config.EtcdConfig.ServingInfo.NamedCertificates[i].KeyFile)
}
refs = append(refs, &config.EtcdConfig.PeerServingInfo.ServerCert.CertFile)
refs = append(refs, &config.EtcdConfig.PeerServingInfo.ServerCert.KeyFile)
refs = append(refs, &config.EtcdConfig.PeerServingInfo.ClientCA)
for i := range config.EtcdConfig.PeerServingInfo.NamedCertificates {
refs = append(refs, &config.EtcdConfig.PeerServingInfo.NamedCertificates[i].CertFile)
refs = append(refs, &config.EtcdConfig.PeerServingInfo.NamedCertificates[i].KeyFile)
}
refs = append(refs, &config.EtcdConfig.StorageDir)
}
if config.OAuthConfig != nil {
if config.OAuthConfig.MasterCA != nil {
refs = append(refs, config.OAuthConfig.MasterCA)
}
if config.OAuthConfig.SessionConfig != nil {
refs = append(refs, &config.OAuthConfig.SessionConfig.SessionSecretsFile)
}
for _, identityProvider := range config.OAuthConfig.IdentityProviders {
switch provider := identityProvider.Provider.(type) {
case (*RequestHeaderIdentityProvider):
refs = append(refs, &provider.ClientCA)
case (*HTPasswdPasswordIdentityProvider):
refs = append(refs, &provider.File)
case (*LDAPPasswordIdentityProvider):
refs = append(refs, &provider.CA)
refs = append(refs, GetStringSourceFileReferences(&provider.BindPassword)...)
case (*BasicAuthPasswordIdentityProvider):
refs = append(refs, &provider.RemoteConnectionInfo.CA)
refs = append(refs, &provider.RemoteConnectionInfo.ClientCert.CertFile)
refs = append(refs, &provider.RemoteConnectionInfo.ClientCert.KeyFile)
case (*KeystonePasswordIdentityProvider):
refs = append(refs, &provider.RemoteConnectionInfo.CA)
refs = append(refs, &provider.RemoteConnectionInfo.ClientCert.CertFile)
refs = append(refs, &provider.RemoteConnectionInfo.ClientCert.KeyFile)
case (*GitLabIdentityProvider):
refs = append(refs, &provider.CA)
refs = append(refs, GetStringSourceFileReferences(&provider.ClientSecret)...)
case (*OpenIDIdentityProvider):
refs = append(refs, &provider.CA)
refs = append(refs, GetStringSourceFileReferences(&provider.ClientSecret)...)
case (*GoogleIdentityProvider):
refs = append(refs, GetStringSourceFileReferences(&provider.ClientSecret)...)
case (*GitHubIdentityProvider):
refs = append(refs, GetStringSourceFileReferences(&provider.ClientSecret)...)
}
}
if config.OAuthConfig.Templates != nil {
refs = append(refs, &config.OAuthConfig.Templates.Login)
refs = append(refs, &config.OAuthConfig.Templates.ProviderSelection)
refs = append(refs, &config.OAuthConfig.Templates.Error)
}
}
if config.AssetConfig != nil {
refs = append(refs, &config.AssetConfig.ServingInfo.ServerCert.CertFile)
refs = append(refs, &config.AssetConfig.ServingInfo.ServerCert.KeyFile)
refs = append(refs, &config.AssetConfig.ServingInfo.ClientCA)
for i := range config.AssetConfig.ServingInfo.NamedCertificates {
refs = append(refs, &config.AssetConfig.ServingInfo.NamedCertificates[i].CertFile)
refs = append(refs, &config.AssetConfig.ServingInfo.NamedCertificates[i].KeyFile)
}
for i := range config.AssetConfig.ExtensionScripts {
refs = append(refs, &config.AssetConfig.ExtensionScripts[i])
}
for i := range config.AssetConfig.ExtensionStylesheets {
refs = append(refs, &config.AssetConfig.ExtensionStylesheets[i])
}
for i := range config.AssetConfig.Extensions {
refs = append(refs, &config.AssetConfig.Extensions[i].SourceDirectory)
}
}
if config.KubernetesMasterConfig != nil {
refs = append(refs, &config.KubernetesMasterConfig.SchedulerConfigFile)
refs = append(refs, &config.KubernetesMasterConfig.ProxyClientInfo.CertFile)
refs = append(refs, &config.KubernetesMasterConfig.ProxyClientInfo.KeyFile)
}
refs = append(refs, &config.ServiceAccountConfig.MasterCA)
refs = append(refs, &config.ServiceAccountConfig.PrivateKeyFile)
for i := range config.ServiceAccountConfig.PublicKeyFiles {
refs = append(refs, &config.ServiceAccountConfig.PublicKeyFiles[i])
}
refs = append(refs, &config.MasterClients.OpenShiftLoopbackKubeConfig)
refs = append(refs, &config.MasterClients.ExternalKubernetesKubeConfig)
refs = append(refs, &config.PolicyConfig.BootstrapPolicyFile)
if config.ControllerConfig.ServiceServingCert.Signer != nil {
refs = append(refs, &config.ControllerConfig.ServiceServingCert.Signer.CertFile)
refs = append(refs, &config.ControllerConfig.ServiceServingCert.Signer.KeyFile)
}
refs = append(refs, &config.AuditConfig.AuditFilePath)
return refs
}
func RelativizeNodeConfigPaths(config *NodeConfig, base string) error {
return cmdutil.RelativizePathWithNoBacksteps(GetNodeFileReferences(config), base)
}
func ResolveNodeConfigPaths(config *NodeConfig, base string) error {
return cmdutil.ResolvePaths(GetNodeFileReferences(config), base)
}
func GetNodeFileReferences(config *NodeConfig) []*string {
refs := []*string{}
refs = append(refs, &config.ServingInfo.ServerCert.CertFile)
refs = append(refs, &config.ServingInfo.ServerCert.KeyFile)
refs = append(refs, &config.ServingInfo.ClientCA)
for i := range config.ServingInfo.NamedCertificates {
refs = append(refs, &config.ServingInfo.NamedCertificates[i].CertFile)
refs = append(refs, &config.ServingInfo.NamedCertificates[i].KeyFile)
}
refs = append(refs, &config.MasterKubeConfig)
refs = append(refs, &config.VolumeDirectory)
if config.PodManifestConfig != nil {
refs = append(refs, &config.PodManifestConfig.Path)
}
return refs
}
// SetProtobufClientDefaults sets the appropriate content types for defaulting to protobuf
// client communications and increases the default QPS and burst. This is used to override
// defaulted config supporting versions older than 1.3 for new configurations generated in 1.3+.
func SetProtobufClientDefaults(overrides *ClientConnectionOverrides) {
overrides.AcceptContentTypes = "application/vnd.kubernetes.protobuf,application/json"
overrides.ContentType = "application/vnd.kubernetes.protobuf"
overrides.QPS *= 2
overrides.Burst *= 2
}
// TODO: clients should be copied and instantiated from a common client config, tweaked, then
// given to individual controllers and other infrastructure components.
func GetKubeClient(kubeConfigFile string, overrides *ClientConnectionOverrides) (*kclientset.Clientset, *restclient.Config, error) {
loadingRules := &clientcmd.ClientConfigLoadingRules{}
loadingRules.ExplicitPath = kubeConfigFile
loader := clientcmd.NewNonInteractiveDeferredLoadingClientConfig(loadingRules, &clientcmd.ConfigOverrides{})
kubeConfig, err := loader.ClientConfig()
if err != nil {
return nil, nil, err
}
applyClientConnectionOverrides(overrides, kubeConfig)
kubeConfig.WrapTransport = DefaultClientTransport
clientset, err := kclientset.NewForConfig(kubeConfig)
if err != nil {
return nil, nil, err
}
return clientset, kubeConfig, nil
}
// TODO: clients should be copied and instantiated from a common client config, tweaked, then
// given to individual controllers and other infrastructure components. Overrides are optional
// and may alter the default configuration.
func GetOpenShiftClient(kubeConfigFile string, overrides *ClientConnectionOverrides) (*client.Client, *restclient.Config, error) {
loadingRules := &clientcmd.ClientConfigLoadingRules{}
loadingRules.ExplicitPath = kubeConfigFile
loader := clientcmd.NewNonInteractiveDeferredLoadingClientConfig(loadingRules, &clientcmd.ConfigOverrides{})
kubeConfig, err := loader.ClientConfig()
if err != nil {
return nil, nil, err
}
applyClientConnectionOverrides(overrides, kubeConfig)
kubeConfig.WrapTransport = DefaultClientTransport
openshiftClient, err := client.New(kubeConfig)
if err != nil {
return nil, nil, err
}
return openshiftClient, kubeConfig, nil
}
// applyClientConnectionOverrides updates a kubeConfig with the overrides from the config.
func applyClientConnectionOverrides(overrides *ClientConnectionOverrides, kubeConfig *restclient.Config) {
if overrides == nil {
return
}
kubeConfig.QPS = overrides.QPS
kubeConfig.Burst = int(overrides.Burst)
kubeConfig.ContentConfig.AcceptContentTypes = overrides.AcceptContentTypes
kubeConfig.ContentConfig.ContentType = overrides.ContentType
}
// DefaultClientTransport sets defaults for a client Transport that are suitable
// for use by infrastructure components.
func DefaultClientTransport(rt http.RoundTripper) http.RoundTripper {
transport := rt.(*http.Transport)
// TODO: this should be configured by the caller, not in this method.
dialer := &net.Dialer{
Timeout: 30 * time.Second,
KeepAlive: 30 * time.Second,
}
transport.Dial = dialer.Dial
// Hold open more internal idle connections
// TODO: this should be configured by the caller, not in this method.
transport.MaxIdleConnsPerHost = 100
return transport
}
func UseTLS(servingInfo ServingInfo) bool {
return len(servingInfo.ServerCert.CertFile) > 0
}
// GetAPIClientCertCAPool returns the cert pool used to validate client certificates to the API server
func GetAPIClientCertCAPool(options MasterConfig) (*x509.CertPool, error) {
return cmdutil.CertPoolFromFile(options.ServingInfo.ClientCA)
}
// GetNamedCertificateMap returns a map of strings to *tls.Certificate, suitable for use in tls.Config#NamedCertificates
// Returns an error if any of the certs cannot be loaded, or do not match the configured name
// Returns nil if len(namedCertificates) == 0
func GetNamedCertificateMap(namedCertificates []NamedCertificate) (map[string]*tls.Certificate, error) {
if len(namedCertificates) == 0 {
return nil, nil
}
namedCerts := map[string]*tls.Certificate{}
for _, namedCertificate := range namedCertificates {
cert, err := tls.LoadX509KeyPair(namedCertificate.CertFile, namedCertificate.KeyFile)
if err != nil {
return nil, err
}
for _, name := range namedCertificate.Names {
namedCerts[name] = &cert
}
}
return namedCerts, nil
}
// GetClientCertCAPool returns a cert pool containing all client CAs that could be presented (union of API and OAuth)
func GetClientCertCAPool(options MasterConfig) (*x509.CertPool, error) {
roots := x509.NewCertPool()
// Add CAs for OAuth
certs, err := GetOAuthClientCertCAs(options)
if err != nil {
return nil, err
}
for _, root := range certs {
roots.AddCert(root)
}
// Add CAs for API
certs, err = getAPIClientCertCAs(options)
if err != nil {
return nil, err
}
for _, root := range certs {
roots.AddCert(root)
}
return roots, nil
}
func GetOAuthClientCertCAs(options MasterConfig) ([]*x509.Certificate, error) {
if !UseTLS(options.ServingInfo.ServingInfo) {
return nil, nil
}
allCerts := []*x509.Certificate{}
if options.OAuthConfig != nil {
for _, identityProvider := range options.OAuthConfig.IdentityProviders {
switch provider := identityProvider.Provider.(type) {
case (*RequestHeaderIdentityProvider):
caFile := provider.ClientCA
if len(caFile) == 0 {
continue
}
certs, err := cmdutil.CertificatesFromFile(caFile)
if err != nil {
return nil, fmt.Errorf("Error reading %s: %s", caFile, err)
}
allCerts = append(allCerts, certs...)
}
}
}
return allCerts, nil
}
func getAPIClientCertCAs(options MasterConfig) ([]*x509.Certificate, error) {
if !UseTLS(options.ServingInfo.ServingInfo) {
return nil, nil
}
return cmdutil.CertificatesFromFile(options.ServingInfo.ClientCA)
}
func GetKubeletClientConfig(options MasterConfig) *kubeletclient.KubeletClientConfig {
config := &kubeletclient.KubeletClientConfig{
Port: options.KubeletClientInfo.Port,
PreferredAddressTypes: []string{
string(api.NodeHostName),
string(api.NodeInternalIP),
string(api.NodeExternalIP),
string(api.NodeLegacyHostIP),
},
}
if len(options.KubeletClientInfo.CA) > 0 {
config.EnableHttps = true
config.CAFile = options.KubeletClientInfo.CA
}
if len(options.KubeletClientInfo.ClientCert.CertFile) > 0 {
config.EnableHttps = true
config.CertFile = options.KubeletClientInfo.ClientCert.CertFile
config.KeyFile = options.KubeletClientInfo.ClientCert.KeyFile
}
return config
}
func IsPasswordAuthenticator(provider IdentityProvider) bool {
switch provider.Provider.(type) {
case
(*BasicAuthPasswordIdentityProvider),
(*AllowAllPasswordIdentityProvider),
(*DenyAllPasswordIdentityProvider),
(*HTPasswdPasswordIdentityProvider),
(*LDAPPasswordIdentityProvider),
(*KeystonePasswordIdentityProvider):
return true
}
return false
}
func IsIdentityProviderType(provider runtime.Object) bool {
switch provider.(type) {
case
(*RequestHeaderIdentityProvider),
(*BasicAuthPasswordIdentityProvider),
(*AllowAllPasswordIdentityProvider),
(*DenyAllPasswordIdentityProvider),
(*HTPasswdPasswordIdentityProvider),
(*LDAPPasswordIdentityProvider),
(*KeystonePasswordIdentityProvider),
(*OpenIDIdentityProvider),
(*GitHubIdentityProvider),
(*GitLabIdentityProvider),
(*GoogleIdentityProvider):
return true
}
return false
}
func IsOAuthIdentityProvider(provider IdentityProvider) bool {
switch provider.Provider.(type) {
case
(*OpenIDIdentityProvider),
(*GitHubIdentityProvider),
(*GitLabIdentityProvider),
(*GoogleIdentityProvider):
return true
}
return false
}
func HasOpenShiftAPILevel(config MasterConfig, apiLevel string) bool {
apiLevelSet := sets.NewString(config.APILevels...)
return apiLevelSet.Has(apiLevel)
}
// GetEnabledAPIVersionsForGroup returns the list of API Versions that are enabled for that group
func GetEnabledAPIVersionsForGroup(config KubernetesMasterConfig, apiGroup string) []string {
allowedVersions := KubeAPIGroupsToAllowedVersions[apiGroup]
blacklist := sets.NewString(config.DisabledAPIGroupVersions[apiGroup]...)
if blacklist.Has(AllVersions) {
return []string{}
}
enabledVersions := []string{}
for _, currVersion := range allowedVersions {
if !blacklist.Has(currVersion) {
enabledVersions = append(enabledVersions, currVersion)
}
}
return enabledVersions
}
// GetDisabledAPIVersionsForGroup returns the list of API Versions that are disabled for that group
func GetDisabledAPIVersionsForGroup(config KubernetesMasterConfig, apiGroup string) []string {
allowedVersions := sets.NewString(KubeAPIGroupsToAllowedVersions[apiGroup]...)
enabledVersions := sets.NewString(GetEnabledAPIVersionsForGroup(config, apiGroup)...)
return allowedVersions.Difference(enabledVersions).List()
}
func HasKubernetesAPIVersion(config KubernetesMasterConfig, groupVersion unversioned.GroupVersion) bool {
enabledVersions := GetEnabledAPIVersionsForGroup(config, groupVersion.Group)
return sets.NewString(enabledVersions...).Has(groupVersion.Version)
}
func CIDRsOverlap(cidr1, cidr2 string) bool {
_, ipNet1, err := net.ParseCIDR(cidr1)
if err != nil {
return false
}
_, ipNet2, err := net.ParseCIDR(cidr2)
if err != nil {
return false
}
return ipNet1.Contains(ipNet2.IP) || ipNet2.Contains(ipNet1.IP)
}