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master_config.go
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master_config.go
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package origin
import (
"crypto/x509"
"fmt"
"io/ioutil"
"net"
"reflect"
"strings"
"time"
"github.com/golang/glog"
kapierrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/api/meta"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apimachinery/pkg/util/sets"
"k8s.io/apiserver/pkg/admission"
"k8s.io/apiserver/pkg/admission/initializer"
"k8s.io/apiserver/pkg/admission/plugin/namespace/lifecycle"
"k8s.io/apiserver/pkg/audit"
"k8s.io/apiserver/pkg/authentication/authenticator"
"k8s.io/apiserver/pkg/authentication/group"
"k8s.io/apiserver/pkg/authentication/request/anonymous"
"k8s.io/apiserver/pkg/authentication/request/bearertoken"
"k8s.io/apiserver/pkg/authentication/request/headerrequest"
"k8s.io/apiserver/pkg/authentication/request/union"
"k8s.io/apiserver/pkg/authentication/request/websocket"
x509request "k8s.io/apiserver/pkg/authentication/request/x509"
tokencache "k8s.io/apiserver/pkg/authentication/token/cache"
tokenunion "k8s.io/apiserver/pkg/authentication/token/union"
"k8s.io/apiserver/pkg/authentication/user"
kauthorizer "k8s.io/apiserver/pkg/authorization/authorizer"
"k8s.io/apiserver/pkg/authorization/authorizerfactory"
authorizerunion "k8s.io/apiserver/pkg/authorization/union"
apirequest "k8s.io/apiserver/pkg/endpoints/request"
"k8s.io/client-go/discovery"
cacheddiscovery "k8s.io/client-go/discovery/cached"
kubeclientgoinformers "k8s.io/client-go/informers"
kubeclientgoclient "k8s.io/client-go/kubernetes"
restclient "k8s.io/client-go/rest"
"k8s.io/client-go/tools/cache"
kapi "k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/auth/nodeidentifier"
kclientsetexternal "k8s.io/kubernetes/pkg/client/clientset_generated/clientset"
kclientsetinternal "k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset"
kinformers "k8s.io/kubernetes/pkg/client/informers/informers_generated/externalversions"
kinternalinformers "k8s.io/kubernetes/pkg/client/informers/informers_generated/internalversion"
coreinformers "k8s.io/kubernetes/pkg/client/informers/informers_generated/internalversion/core/internalversion"
rbacinformers "k8s.io/kubernetes/pkg/client/informers/informers_generated/internalversion/rbac/internalversion"
rbaclisters "k8s.io/kubernetes/pkg/client/listers/rbac/internalversion"
sacontroller "k8s.io/kubernetes/pkg/controller/serviceaccount"
kadmission "k8s.io/kubernetes/pkg/kubeapiserver/admission"
kubeletclient "k8s.io/kubernetes/pkg/kubelet/client"
rbacregistryvalidation "k8s.io/kubernetes/pkg/registry/rbac/validation"
"k8s.io/kubernetes/pkg/serviceaccount"
noderestriction "k8s.io/kubernetes/plugin/pkg/admission/noderestriction"
saadmit "k8s.io/kubernetes/plugin/pkg/admission/serviceaccount"
storageclassdefaultadmission "k8s.io/kubernetes/plugin/pkg/admission/storageclass/setdefault"
"k8s.io/kubernetes/plugin/pkg/auth/authorizer/node"
rbacauthorizer "k8s.io/kubernetes/plugin/pkg/auth/authorizer/rbac"
kbootstrappolicy "k8s.io/kubernetes/plugin/pkg/auth/authorizer/rbac/bootstrappolicy"
"github.com/openshift/origin/pkg/auth/authenticator/request/paramtoken"
authnregistry "github.com/openshift/origin/pkg/auth/oauth/registry"
"github.com/openshift/origin/pkg/auth/userregistry/identitymapper"
"github.com/openshift/origin/pkg/authorization/authorizer"
"github.com/openshift/origin/pkg/authorization/authorizer/scope"
authorizationinformer "github.com/openshift/origin/pkg/authorization/generated/informers/internalversion"
osclient "github.com/openshift/origin/pkg/client"
oadmission "github.com/openshift/origin/pkg/cmd/server/admission"
configapi "github.com/openshift/origin/pkg/cmd/server/api"
"github.com/openshift/origin/pkg/cmd/server/bootstrappolicy"
kubernetes "github.com/openshift/origin/pkg/cmd/server/kubernetes/master"
admissionregistry "github.com/openshift/origin/pkg/cmd/server/origin/admission"
originrest "github.com/openshift/origin/pkg/cmd/server/origin/rest"
"github.com/openshift/origin/pkg/cmd/util/pluginconfig"
imageadmission "github.com/openshift/origin/pkg/image/admission"
imagepolicy "github.com/openshift/origin/pkg/image/admission/imagepolicy/api"
imageapi "github.com/openshift/origin/pkg/image/apis/image"
imageinformer "github.com/openshift/origin/pkg/image/generated/informers/internalversion"
imageclient "github.com/openshift/origin/pkg/image/generated/internalclientset"
ingressadmission "github.com/openshift/origin/pkg/ingress/admission"
oauthclient "github.com/openshift/origin/pkg/oauth/generated/internalclientset/typed/oauth/internalversion"
projectauth "github.com/openshift/origin/pkg/project/auth"
projectcache "github.com/openshift/origin/pkg/project/cache"
"github.com/openshift/origin/pkg/quota"
overrideapi "github.com/openshift/origin/pkg/quota/admission/clusterresourceoverride/api"
"github.com/openshift/origin/pkg/quota/controller/clusterquotamapping"
quotainformer "github.com/openshift/origin/pkg/quota/generated/informers/internalversion"
templateclient "github.com/openshift/origin/pkg/template/generated/internalclientset"
userinformer "github.com/openshift/origin/pkg/user/generated/informers/internalversion"
userclient "github.com/openshift/origin/pkg/user/generated/internalclientset/typed/user/internalversion"
securityinformer "github.com/openshift/origin/pkg/security/generated/informers/internalversion"
"github.com/openshift/origin/pkg/service"
serviceadmit "github.com/openshift/origin/pkg/service/admission"
usercache "github.com/openshift/origin/pkg/user/cache"
"github.com/openshift/origin/pkg/util/restoptions"
)
// MasterConfig defines the required parameters for starting the OpenShift master
type MasterConfig struct {
Options configapi.MasterConfig
RESTMapper *discovery.DeferredDiscoveryRESTMapper
// RESTOptionsGetter provides access to storage and RESTOptions for a particular resource
RESTOptionsGetter restoptions.Getter
RuleResolver rbacregistryvalidation.AuthorizationRuleResolver
Authenticator authenticator.Request
Authorizer kauthorizer.Authorizer
SubjectLocator authorizer.SubjectLocator
ProjectAuthorizationCache *projectauth.AuthorizationCache
ProjectCache *projectcache.ProjectCache
ClusterQuotaMappingController *clusterquotamapping.ClusterQuotaMappingController
LimitVerifier imageadmission.LimitVerifier
// RequestContextMapper maps requests to contexts
RequestContextMapper apirequest.RequestContextMapper
AdmissionControl admission.Interface
// KubeAdmissionControl holds the kube admission chain. Because of the way the plugin initializer is built
// you'll be passing information in this direction either way. Knowing how to build this chain requires knowledge
// of both the origin config AND the kube config, so this spot makes more sense.
KubeAdmissionControl admission.Interface
// RegistryHostnameRetriever retrieves the name of the integrated registry, or false if no such registry
// is available.
RegistryHostnameRetriever imageapi.RegistryHostnameRetriever
KubeletClientConfig *kubeletclient.KubeletClientConfig
// PrivilegedLoopbackClientConfig is the client configuration used to call OpenShift APIs from system components
// To apply different access control to a system component, create a client config specifically for that component.
PrivilegedLoopbackClientConfig restclient.Config
// PrivilegedLoopbackKubernetesClientsetInternal is the client used to call Kubernetes APIs from system components,
// built from KubeClientConfig. It should only be accessed via the *TestingClient() helper methods. To apply
// different access control to a system component, create a separate client/config specifically for
// that component.
PrivilegedLoopbackKubernetesClientsetInternal kclientsetinternal.Interface
// PrivilegedLoopbackKubernetesClientsetExternal is the client used to call Kubernetes APIs from system components,
// built from KubeClientConfig. It should only be accessed via the *TestingClient() helper methods. To apply
// different access control to a system component, create a separate client/config specifically for
// that component.
PrivilegedLoopbackKubernetesClientsetExternal kclientsetexternal.Interface
// PrivilegedLoopbackOpenShiftClient is the client used to call OpenShift APIs from system components,
// built from PrivilegedLoopbackClientConfig. It should only be accessed via the *TestingClient() helper methods.
// To apply different access control to a system component, create a separate client/config specifically
// for that component.
PrivilegedLoopbackOpenShiftClient *osclient.Client
AuditBackend audit.Backend
// TODO inspect uses to eliminate them
InternalKubeInformers kinternalinformers.SharedInformerFactory
ClientGoKubeInformers kubeclientgoinformers.SharedInformerFactory
AuthorizationInformers authorizationinformer.SharedInformerFactory
QuotaInformers quotainformer.SharedInformerFactory
SecurityInformers securityinformer.SharedInformerFactory
UserInformers userinformer.SharedInformerFactory
}
type InformerAccess interface {
GetInternalKubeInformers() kinternalinformers.SharedInformerFactory
GetExternalKubeInformers() kinformers.SharedInformerFactory
GetClientGoKubeInformers() kubeclientgoinformers.SharedInformerFactory
GetAuthorizationInformers() authorizationinformer.SharedInformerFactory
GetImageInformers() imageinformer.SharedInformerFactory
GetQuotaInformers() quotainformer.SharedInformerFactory
GetSecurityInformers() securityinformer.SharedInformerFactory
GetUserInformers() userinformer.SharedInformerFactory
}
// BuildMasterConfig builds and returns the OpenShift master configuration based on the
// provided options
func BuildMasterConfig(options configapi.MasterConfig, informers InformerAccess) (*MasterConfig, error) {
restOptsGetter, err := originrest.StorageOptions(options)
if err != nil {
return nil, err
}
privilegedLoopbackKubeClientsetInternal, _, err := configapi.GetInternalKubeClient(options.MasterClients.OpenShiftLoopbackKubeConfig, options.MasterClients.OpenShiftLoopbackClientConnectionOverrides)
if err != nil {
return nil, err
}
privilegedLoopbackKubeClientsetExternal, _, err := configapi.GetExternalKubeClient(options.MasterClients.OpenShiftLoopbackKubeConfig, options.MasterClients.OpenShiftLoopbackClientConnectionOverrides)
if err != nil {
return nil, err
}
privilegedLoopbackOpenShiftClient, privilegedLoopbackClientConfig, err := configapi.GetOpenShiftClient(options.MasterClients.OpenShiftLoopbackKubeConfig, options.MasterClients.OpenShiftLoopbackClientConnectionOverrides)
if err != nil {
return nil, err
}
kubeClientGoClientSet, err := kubeclientgoclient.NewForConfig(privilegedLoopbackClientConfig)
if err != nil {
return nil, err
}
imageClient, err := imageclient.NewForConfig(privilegedLoopbackClientConfig)
if err != nil {
return nil, err
}
templateClient, err := templateclient.NewForConfig(privilegedLoopbackClientConfig)
if err != nil {
return nil, err
}
defaultRegistry := env("OPENSHIFT_DEFAULT_REGISTRY", "${DOCKER_REGISTRY_SERVICE_HOST}:${DOCKER_REGISTRY_SERVICE_PORT}")
svcCache := service.NewServiceResolverCache(privilegedLoopbackKubeClientsetInternal.Core().Services(metav1.NamespaceDefault).Get)
defaultRegistryFunc, err := svcCache.Defer(defaultRegistry)
if err != nil {
return nil, fmt.Errorf("OPENSHIFT_DEFAULT_REGISTRY variable is invalid %q: %v", defaultRegistry, err)
}
requestContextMapper := apirequest.NewRequestContextMapper()
projectCache := projectcache.NewProjectCache(
informers.GetInternalKubeInformers().Core().InternalVersion().Namespaces().Informer(),
privilegedLoopbackKubeClientsetInternal.Core().Namespaces(),
options.ProjectConfig.DefaultNodeSelector)
clusterQuotaMappingController := clusterquotamapping.NewClusterQuotaMappingControllerInternal(
informers.GetInternalKubeInformers().Core().InternalVersion().Namespaces(),
informers.GetQuotaInformers().Quota().InternalVersion().ClusterResourceQuotas())
kubeletClientConfig := configapi.GetKubeletClientConfig(options)
quotaRegistry := quota.NewAllResourceQuotaRegistryForAdmission(
informers.GetExternalKubeInformers(),
informers.GetImageInformers().Image().InternalVersion().ImageStreams(),
privilegedLoopbackOpenShiftClient,
privilegedLoopbackKubeClientsetExternal,
)
kubeAuthorizer, ruleResolver, kubeSubjectLocator := buildKubeAuth(informers.GetInternalKubeInformers().Rbac().InternalVersion())
authorizer, subjectLocator := newAuthorizer(
kubeAuthorizer,
kubeSubjectLocator,
informers.GetInternalKubeInformers().Rbac().InternalVersion().ClusterRoles().Lister(),
informers.GetInternalKubeInformers().Core().InternalVersion().Pods(),
informers.GetInternalKubeInformers().Core().InternalVersion().PersistentVolumes(),
options.ProjectConfig.ProjectRequestMessage,
)
// Use a discovery client capable of being refreshed.
discoveryClient := cacheddiscovery.NewMemCacheClient(privilegedLoopbackKubeClientsetInternal.Discovery())
restMapper := discovery.NewDeferredDiscoveryRESTMapper(discoveryClient, meta.InterfacesForUnstructured)
// punch through layers to build this in order to get a string for a cloud provider file
// TODO refactor us into a forward building flow with a side channel like this
kubeOptions, err := kubernetes.BuildKubeAPIserverOptions(options)
if err != nil {
return nil, err
}
var cloudConfig []byte
if kubeOptions.CloudProvider.CloudConfigFile != "" {
var err error
cloudConfig, err = ioutil.ReadFile(kubeOptions.CloudProvider.CloudConfigFile)
if err != nil {
return nil, fmt.Errorf("Error reading from cloud configuration file %s: %v", kubeOptions.CloudProvider.CloudConfigFile, err)
}
}
// note: we are passing a combined quota registry here...
genericInitializer, err := initializer.New(kubeClientGoClientSet, informers.GetClientGoKubeInformers(), authorizer)
if err != nil {
return nil, err
}
kubePluginInitializer := kadmission.NewPluginInitializer(
privilegedLoopbackKubeClientsetInternal,
privilegedLoopbackKubeClientsetExternal,
informers.GetInternalKubeInformers(),
authorizer,
cloudConfig,
restMapper,
quotaRegistry)
openshiftPluginInitializer := &oadmission.PluginInitializer{
OpenshiftClient: privilegedLoopbackOpenShiftClient,
OpenshiftInternalImageClient: imageClient,
OpenshiftInternalTemplateClient: templateClient,
ProjectCache: projectCache,
OriginQuotaRegistry: quotaRegistry,
Authorizer: authorizer,
JenkinsPipelineConfig: options.JenkinsPipelineConfig,
RESTClientConfig: *privilegedLoopbackClientConfig,
Informers: informers.GetInternalKubeInformers(),
ClusterResourceQuotaInformer: informers.GetQuotaInformers().Quota().InternalVersion().ClusterResourceQuotas(),
ClusterQuotaMapper: clusterQuotaMappingController.GetClusterQuotaMapper(),
RegistryHostnameRetriever: imageapi.DefaultRegistryHostnameRetriever(defaultRegistryFunc, options.ImagePolicyConfig.ExternalRegistryHostname, options.ImagePolicyConfig.InternalRegistryHostname),
SecurityInformers: informers.GetSecurityInformers(),
UserInformers: informers.GetUserInformers(),
}
initializersChain := admission.PluginInitializers{genericInitializer, kubePluginInitializer, openshiftPluginInitializer}
originAdmission, kubeAdmission, err := buildAdmissionChains(options, privilegedLoopbackKubeClientsetInternal, initializersChain)
if err != nil {
return nil, err
}
// this is safe because the server does a quorum read and we're hitting a "magic" authorizer to get permissions based on system:masters
// once the cache is added, we won't be paying a double hop cost to etcd on each request, so the simplification will help.
serviceAccountTokenGetter := sacontroller.NewGetterFromClient(privilegedLoopbackKubeClientsetExternal)
userClient, err := userclient.NewForConfig(privilegedLoopbackClientConfig)
if err != nil {
return nil, err
}
oauthClient, err := oauthclient.NewForConfig(privilegedLoopbackClientConfig)
if err != nil {
return nil, err
}
apiClientCAs, err := configapi.GetAPIClientCertCAPool(options)
if err != nil {
return nil, err
}
authenticator, err := newAuthenticator(options, oauthClient.OAuthAccessTokens(), serviceAccountTokenGetter, userClient.Users(), apiClientCAs, usercache.NewGroupCache(informers.GetUserInformers().User().InternalVersion().Groups()))
if err != nil {
return nil, err
}
config := &MasterConfig{
Options: options,
RESTMapper: restMapper,
RESTOptionsGetter: restOptsGetter,
RuleResolver: ruleResolver,
Authenticator: authenticator,
Authorizer: authorizer,
SubjectLocator: subjectLocator,
ProjectAuthorizationCache: newProjectAuthorizationCache(
subjectLocator,
informers.GetInternalKubeInformers().Core().InternalVersion().Namespaces().Informer(),
informers.GetInternalKubeInformers().Rbac().InternalVersion(),
),
ProjectCache: projectCache,
ClusterQuotaMappingController: clusterQuotaMappingController,
RequestContextMapper: requestContextMapper,
AdmissionControl: originAdmission,
KubeAdmissionControl: kubeAdmission,
RegistryHostnameRetriever: imageapi.DefaultRegistryHostnameRetriever(defaultRegistryFunc, options.ImagePolicyConfig.ExternalRegistryHostname, options.ImagePolicyConfig.InternalRegistryHostname),
KubeletClientConfig: kubeletClientConfig,
PrivilegedLoopbackClientConfig: *privilegedLoopbackClientConfig,
PrivilegedLoopbackOpenShiftClient: privilegedLoopbackOpenShiftClient,
PrivilegedLoopbackKubernetesClientsetInternal: privilegedLoopbackKubeClientsetInternal,
PrivilegedLoopbackKubernetesClientsetExternal: privilegedLoopbackKubeClientsetExternal,
InternalKubeInformers: informers.GetInternalKubeInformers(),
ClientGoKubeInformers: informers.GetClientGoKubeInformers(),
AuthorizationInformers: informers.GetAuthorizationInformers(),
QuotaInformers: informers.GetQuotaInformers(),
SecurityInformers: informers.GetSecurityInformers(),
UserInformers: informers.GetUserInformers(),
}
// ensure that the limit range informer will be started
informer := config.InternalKubeInformers.Core().InternalVersion().LimitRanges().Informer()
config.LimitVerifier = imageadmission.NewLimitVerifier(imageadmission.LimitRangesForNamespaceFunc(func(ns string) ([]*kapi.LimitRange, error) {
list, err := config.InternalKubeInformers.Core().InternalVersion().LimitRanges().Lister().LimitRanges(ns).List(labels.Everything())
if err != nil {
return nil, err
}
// the verifier must return an error
if len(list) == 0 && len(informer.LastSyncResourceVersion()) == 0 {
glog.V(4).Infof("LimitVerifier still waiting for ranges to load: %#v", informer)
forbiddenErr := kapierrors.NewForbidden(schema.GroupResource{Resource: "limitranges"}, "", fmt.Errorf("the server is still loading limit information"))
forbiddenErr.ErrStatus.Details.RetryAfterSeconds = 1
return nil, forbiddenErr
}
return list, nil
}))
return config, nil
}
var (
// openshiftAdmissionControlPlugins gives the in-order default admission chain for openshift resources.
openshiftAdmissionControlPlugins = []string{
"ProjectRequestLimit",
"OriginNamespaceLifecycle",
"openshift.io/RestrictSubjectBindings",
"PodNodeConstraints",
"openshift.io/JenkinsBootstrapper",
"openshift.io/BuildConfigSecretInjector",
"BuildByStrategy",
imageadmission.PluginName,
"OwnerReferencesPermissionEnforcement",
"Initializers",
"GenericAdmissionWebhook",
"ResourceQuota",
}
// KubeAdmissionPlugins gives the in-order default admission chain for kube resources.
KubeAdmissionPlugins = []string{
lifecycle.PluginName,
"RunOnceDuration",
"PodNodeConstraints",
"OriginPodNodeEnvironment",
"PodNodeSelector",
overrideapi.PluginName,
serviceadmit.ExternalIPPluginName,
serviceadmit.RestrictedEndpointsPluginName,
imagepolicy.PluginName,
"ImagePolicyWebhook",
"PodPreset",
"LimitRanger",
"ServiceAccount",
noderestriction.PluginName,
"SecurityContextConstraint",
storageclassdefaultadmission.PluginName,
"AlwaysPullImages",
"LimitPodHardAntiAffinityTopology",
"SCCExecRestrictions",
"PersistentVolumeLabel",
"OwnerReferencesPermissionEnforcement",
ingressadmission.IngressAdmission,
"DefaultTolerationSeconds",
"Initializers",
"GenericAdmissionWebhook",
"PodTolerationRestriction",
// NOTE: ResourceQuota and ClusterResourceQuota must be the last 2 plugins.
// DO NOT ADD ANY PLUGINS AFTER THIS LINE!
"ResourceQuota",
"openshift.io/ClusterResourceQuota",
}
// CombinedAdmissionControlPlugins gives the in-order default admission chain for all resources resources.
// When possible, this list is used. The set of openshift+kube chains must exactly match this set. In addition,
// the order specified in the openshift and kube chains must match the order here.
CombinedAdmissionControlPlugins = []string{
lifecycle.PluginName,
"ProjectRequestLimit",
"OriginNamespaceLifecycle",
"openshift.io/RestrictSubjectBindings",
"PodNodeConstraints",
"openshift.io/JenkinsBootstrapper",
"openshift.io/BuildConfigSecretInjector",
"BuildByStrategy",
imageadmission.PluginName,
"RunOnceDuration",
"PodNodeConstraints",
"OriginPodNodeEnvironment",
"PodNodeSelector",
overrideapi.PluginName,
serviceadmit.ExternalIPPluginName,
serviceadmit.RestrictedEndpointsPluginName,
imagepolicy.PluginName,
"ImagePolicyWebhook",
"PodPreset",
"LimitRanger",
"ServiceAccount",
noderestriction.PluginName,
"SecurityContextConstraint",
storageclassdefaultadmission.PluginName,
"AlwaysPullImages",
"LimitPodHardAntiAffinityTopology",
"SCCExecRestrictions",
"PersistentVolumeLabel",
"OwnerReferencesPermissionEnforcement",
ingressadmission.IngressAdmission,
"DefaultTolerationSeconds",
"Initializers",
"GenericAdmissionWebhook",
"PodTolerationRestriction",
// NOTE: ResourceQuota and ClusterResourceQuota must be the last 2 plugins.
// DO NOT ADD ANY PLUGINS AFTER THIS LINE!
"ResourceQuota",
"openshift.io/ClusterResourceQuota",
}
)
// replace returns a slice where each instance of the input that is x is replaced with y
func replace(input []string, x, y string) []string {
result := []string{}
for i := range input {
if input[i] == x {
result = append(result, y)
} else {
result = append(result, input[i])
}
}
return result
}
// dedupe removes duplicate items from the input list.
// the last instance of a duplicate is kept in the input list.
func dedupe(input []string) []string {
items := sets.NewString()
result := []string{}
for i := len(input) - 1; i >= 0; i-- {
if items.Has(input[i]) {
continue
}
items.Insert(input[i])
result = append([]string{input[i]}, result...)
}
return result
}
// fixupAdmissionPlugins fixes the input plugins to handle deprecation and duplicates.
func fixupAdmissionPlugins(plugins []string) []string {
result := replace(plugins, "openshift.io/OriginResourceQuota", "ResourceQuota")
result = dedupe(result)
return result
}
func buildAdmissionChains(options configapi.MasterConfig, kubeClientSet kclientsetinternal.Interface, admissionInitializer admission.PluginInitializer) (admission.Interface /*origin*/, admission.Interface /*kube*/, error) {
// check to see if they've taken explicit control of the kube admission chain
// this happens when any of the following are true:
// 1. extended kube server args are used to change the admission plugin list
// 2. kube explicit config changes the admission plugin list
// 3. extended kube server args are used to change the admission config file
// 4. openshift explicit config changes the admission plugins list
// 5. kube and openshift plugin config try to configure the same plugin differently
// TODO: one release from now, I think we should start failing on setting the kube admission config
// two releases from now, I think we should start removing it
// two releases from now, I think we should remove the PluginOverrideOrder entirely
hasSeparateKubeAdmissionChain := false
KubeAdmissionPlugins := KubeAdmissionPlugins
if options.KubernetesMasterConfig != nil && len(options.KubernetesMasterConfig.APIServerArguments["admission-control"]) > 0 {
KubeAdmissionPlugins = strings.Split(options.KubernetesMasterConfig.APIServerArguments["admission-control"][0], ",")
hasSeparateKubeAdmissionChain = true
}
if options.KubernetesMasterConfig != nil && len(options.KubernetesMasterConfig.AdmissionConfig.PluginOrderOverride) > 0 {
KubeAdmissionPlugins = options.KubernetesMasterConfig.AdmissionConfig.PluginOrderOverride
hasSeparateKubeAdmissionChain = true
}
KubeAdmissionPlugins = fixupAdmissionPlugins(KubeAdmissionPlugins)
kubeAdmissionPluginConfigFilename := ""
if options.KubernetesMasterConfig != nil && len(options.KubernetesMasterConfig.APIServerArguments["admission-control-config-file"]) > 0 {
kubeAdmissionPluginConfigFilename = options.KubernetesMasterConfig.APIServerArguments["admission-control-config-file"][0]
hasSeparateKubeAdmissionChain = true
}
openshiftAdmissionPlugins := openshiftAdmissionControlPlugins
if len(options.AdmissionConfig.PluginOrderOverride) > 0 {
openshiftAdmissionPlugins = options.AdmissionConfig.PluginOrderOverride
hasSeparateKubeAdmissionChain = true
}
openshiftAdmissionPlugins = fixupAdmissionPlugins(openshiftAdmissionPlugins)
if options.KubernetesMasterConfig != nil && !hasSeparateKubeAdmissionChain {
// check for collisions between openshift and kube plugin config
for pluginName, kubeConfig := range options.KubernetesMasterConfig.AdmissionConfig.PluginConfig {
if openshiftConfig, exists := options.AdmissionConfig.PluginConfig[pluginName]; exists && !reflect.DeepEqual(kubeConfig, openshiftConfig) {
hasSeparateKubeAdmissionChain = true
break
}
}
}
if hasSeparateKubeAdmissionChain {
// build kube admission
var kubeAdmission admission.Interface
if options.KubernetesMasterConfig != nil {
var err error
kubeAdmission, err = newAdmissionChainFunc(KubeAdmissionPlugins, kubeAdmissionPluginConfigFilename, options.KubernetesMasterConfig.AdmissionConfig.PluginConfig, options, kubeClientSet, admissionInitializer)
if err != nil {
return nil, nil, err
}
}
// build openshift admission
openshiftAdmission, err := newAdmissionChainFunc(openshiftAdmissionPlugins, "", options.AdmissionConfig.PluginConfig, options, kubeClientSet, admissionInitializer)
if err != nil {
return nil, nil, err
}
return openshiftAdmission, kubeAdmission, nil
}
// if we have a unified chain, build the combined config
pluginConfig := map[string]configapi.AdmissionPluginConfig{}
if options.KubernetesMasterConfig != nil {
for pluginName, config := range options.KubernetesMasterConfig.AdmissionConfig.PluginConfig {
pluginConfig[pluginName] = config
}
}
for pluginName, config := range options.AdmissionConfig.PluginConfig {
pluginConfig[pluginName] = config
}
admissionChain, err := newAdmissionChainFunc(CombinedAdmissionControlPlugins, "", pluginConfig, options, kubeClientSet, admissionInitializer)
if err != nil {
return nil, nil, err
}
return admissionChain, admissionChain, err
}
// newAdmissionChainFunc is for unit testing only. You should NEVER OVERRIDE THIS outside of a unit test.
var newAdmissionChainFunc = newAdmissionChain
func newAdmissionChain(pluginNames []string, admissionConfigFilename string, pluginConfig map[string]configapi.AdmissionPluginConfig, options configapi.MasterConfig, kubeClientSet kclientsetinternal.Interface, admissionInitializer admission.PluginInitializer) (admission.Interface, error) {
plugins := []admission.Interface{}
for _, pluginName := range pluginNames {
var (
plugin admission.Interface
skipInitialization bool
)
switch pluginName {
case lifecycle.PluginName:
// We need to include our infrastructure and shared resource namespaces in the immortal namespaces list
immortalNamespaces := sets.NewString(metav1.NamespaceDefault)
if len(options.PolicyConfig.OpenShiftSharedResourcesNamespace) > 0 {
immortalNamespaces.Insert(options.PolicyConfig.OpenShiftSharedResourcesNamespace)
}
if len(options.PolicyConfig.OpenShiftInfrastructureNamespace) > 0 {
immortalNamespaces.Insert(options.PolicyConfig.OpenShiftInfrastructureNamespace)
}
lc, err := lifecycle.NewLifecycle(immortalNamespaces)
if err != nil {
return nil, err
}
admissionInitializer.Initialize(lc)
if err := lc.(admission.Validator).Validate(); err != nil {
return nil, err
}
plugin = lc
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
}
allowIngressIP := false
if _, ipNet, err := net.ParseCIDR(options.NetworkConfig.IngressIPNetworkCIDR); err == nil && !ipNet.IP.IsUnspecified() {
allowIngressIP = true
}
plugin = serviceadmit.NewExternalIPRanger(reject, admit, allowIngressIP)
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
}
plugin = 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()
saAdmitter.SetInternalKubeClientSet(kubeClientSet)
saAdmitter.LimitSecretReferences = options.ServiceAccountConfig.LimitSecretReferences
plugin = saAdmitter
default:
configFile, err := pluginconfig.GetAdmissionConfigurationFile(pluginConfig, pluginName, admissionConfigFilename)
if err != nil {
return nil, err
}
configReader, err := admission.ReadAdmissionConfiguration([]string{pluginName}, configFile)
if err != nil {
return nil, err
}
pluginConfigReader, err := configReader.ConfigFor(pluginName)
if err != nil {
return nil, err
}
plugin, err = admissionregistry.OriginAdmissionPlugins.InitPlugin(pluginName, pluginConfigReader, admissionInitializer)
if err != nil {
// should have been caught with validation
return nil, err
}
if plugin == nil {
continue
}
// skip initialization below because admission.InitPlugin does all the work
skipInitialization = true
}
plugins = append(plugins, plugin)
if !skipInitialization {
admissionInitializer.Initialize(plugin)
}
}
// ensure that plugins have been properly initialized
if err := oadmission.Validate(plugins); err != nil {
return nil, err
}
return admission.NewChainHandler(plugins...), nil
}
func newAuthenticator(config configapi.MasterConfig, accessTokenGetter oauthclient.OAuthAccessTokenInterface, tokenGetter serviceaccount.ServiceAccountTokenGetter, userGetter userclient.UserResourceInterface, apiClientCAs *x509.CertPool, groupMapper identitymapper.UserToGroupMapper) (authenticator.Request, error) {
authenticators := []authenticator.Request{}
tokenAuthenticators := []authenticator.Token{}
// ServiceAccount token
if len(config.ServiceAccountConfig.PublicKeyFiles) > 0 {
publicKeys := []interface{}{}
for _, keyFile := range config.ServiceAccountConfig.PublicKeyFiles {
readPublicKeys, err := serviceaccount.ReadPublicKeys(keyFile)
if err != nil {
return nil, fmt.Errorf("Error reading service account key file %s: %v", keyFile, err)
}
publicKeys = append(publicKeys, readPublicKeys...)
}
serviceAccountTokenAuthenticator := serviceaccount.JWTTokenAuthenticator(publicKeys, true, tokenGetter)
tokenAuthenticators = append(tokenAuthenticators, serviceAccountTokenAuthenticator)
}
// OAuth token
if config.OAuthConfig != nil {
oauthTokenAuthenticator := authnregistry.NewTokenAuthenticator(accessTokenGetter, userGetter, groupMapper)
tokenAuthenticators = append(tokenAuthenticators,
// if you have a bearer token, you're a human (usually)
// if you change this, have a look at the impersonationFilter where we attach groups to the impersonated user
group.NewTokenGroupAdder(oauthTokenAuthenticator, []string{bootstrappolicy.AuthenticatedOAuthGroup}))
}
if len(tokenAuthenticators) > 0 {
// Combine all token authenticators
tokenAuth := tokenunion.New(tokenAuthenticators...)
// wrap with short cache on success.
// this means a revoked service account token or access token will be valid for up to 10 seconds.
// it also means group membership changes on users may take up to 10 seconds to become effective.
tokenAuth = tokencache.New(tokenAuth, 10*time.Second, 0)
authenticators = append(authenticators,
bearertoken.New(tokenAuth),
websocket.NewProtocolAuthenticator(tokenAuth),
paramtoken.New("access_token", tokenAuth, true),
)
}
// build cert authenticator
// TODO: add "system:" prefix in authenticator, limit cert to username
// TODO: add "system:" prefix to groups in authenticator, limit cert to group name
opts := x509request.DefaultVerifyOptions()
opts.Roots = apiClientCAs
certauth := x509request.New(opts, x509request.CommonNameUserConversion)
authenticators = append(authenticators, certauth)
resultingAuthenticator := union.NewFailOnError(authenticators...)
topLevelAuthenticators := []authenticator.Request{}
// if we have a front proxy providing authentication configuration, wire it up and it should come first
if config.AuthConfig.RequestHeader != nil {
requestHeaderAuthenticator, err := headerrequest.NewSecure(
config.AuthConfig.RequestHeader.ClientCA,
config.AuthConfig.RequestHeader.ClientCommonNames,
config.AuthConfig.RequestHeader.UsernameHeaders,
config.AuthConfig.RequestHeader.GroupHeaders,
config.AuthConfig.RequestHeader.ExtraHeaderPrefixes,
)
if err != nil {
return nil, fmt.Errorf("Error building front proxy auth config: %v", err)
}
topLevelAuthenticators = append(topLevelAuthenticators, union.New(requestHeaderAuthenticator, resultingAuthenticator))
} else {
topLevelAuthenticators = append(topLevelAuthenticators, resultingAuthenticator)
}
topLevelAuthenticators = append(topLevelAuthenticators, anonymous.NewAuthenticator())
return group.NewAuthenticatedGroupAdder(union.NewFailOnError(topLevelAuthenticators...)), nil
}
func newProjectAuthorizationCache(subjectLocator authorizer.SubjectLocator, namespaces cache.SharedIndexInformer, internalRBACInformers rbacinformers.Interface) *projectauth.AuthorizationCache {
return projectauth.NewAuthorizationCache(
namespaces,
projectauth.NewAuthorizerReviewer(subjectLocator),
internalRBACInformers,
)
}
func buildKubeAuth(r rbacinformers.Interface) (kauthorizer.Authorizer, rbacregistryvalidation.AuthorizationRuleResolver, rbacauthorizer.SubjectLocator) {
roles := &rbacauthorizer.RoleGetter{Lister: r.Roles().Lister()}
roleBindings := &rbacauthorizer.RoleBindingLister{Lister: r.RoleBindings().Lister()}
clusterRoles := &rbacauthorizer.ClusterRoleGetter{Lister: r.ClusterRoles().Lister()}
clusterRoleBindings := &rbacauthorizer.ClusterRoleBindingLister{Lister: r.ClusterRoleBindings().Lister()}
kubeAuthorizer := rbacauthorizer.New(roles, roleBindings, clusterRoles, clusterRoleBindings)
ruleResolver := rbacregistryvalidation.NewDefaultRuleResolver(roles, roleBindings, clusterRoles, clusterRoleBindings)
kubeSubjectLocator := rbacauthorizer.NewSubjectAccessEvaluator(roles, roleBindings, clusterRoles, clusterRoleBindings, "")
return kubeAuthorizer, ruleResolver, kubeSubjectLocator
}
func newAuthorizer(
kubeAuthorizer kauthorizer.Authorizer,
kubeSubjectLocator rbacauthorizer.SubjectLocator,
clusterRoleGetter rbaclisters.ClusterRoleLister,
podInformer coreinformers.PodInformer,
pvInformer coreinformers.PersistentVolumeInformer,
projectRequestDenyMessage string,
) (kauthorizer.Authorizer, authorizer.SubjectLocator) {
messageMaker := authorizer.NewForbiddenMessageResolver(projectRequestDenyMessage)
roleBasedAuthorizer := authorizer.NewAuthorizer(kubeAuthorizer, messageMaker)
subjectLocator := authorizer.NewSubjectLocator(kubeSubjectLocator)
scopeLimitedAuthorizer := scope.NewAuthorizer(roleBasedAuthorizer, clusterRoleGetter, messageMaker)
graph := node.NewGraph()
node.AddGraphEventHandlers(graph, podInformer, pvInformer)
nodeAuthorizer := node.NewAuthorizer(graph, nodeidentifier.NewDefaultNodeIdentifier(), kbootstrappolicy.NodeRules())
authorizer := authorizerunion.New(
authorizerfactory.NewPrivilegedGroups(user.SystemPrivilegedGroup), // authorizes system:masters to do anything, just like upstream
nodeAuthorizer,
scopeLimitedAuthorizer)
return authorizer, subjectLocator
}
// KubeClientsetInternal returns the kubernetes client object
func (c *MasterConfig) KubeClientsetInternal() kclientsetinternal.Interface {
return c.PrivilegedLoopbackKubernetesClientsetInternal
}
// KubeClientsetInternal returns the kubernetes client object
func (c *MasterConfig) KubeClientsetExternal() kclientsetexternal.Interface {
return c.PrivilegedLoopbackKubernetesClientsetExternal
}
// ServiceAccountRoleBindingClient returns the client object used to bind roles to service accounts
// It must have the following capabilities:
// get, list, update, create policyBindings and clusterPolicyBindings in all namespaces
func (c *MasterConfig) ServiceAccountRoleBindingClient() *osclient.Client {
return c.PrivilegedLoopbackOpenShiftClient
}
// RouteAllocatorClients returns the route allocator client objects
func (c *MasterConfig) RouteAllocatorClients() (*osclient.Client, kclientsetinternal.Interface) {
return c.PrivilegedLoopbackOpenShiftClient, c.PrivilegedLoopbackKubernetesClientsetInternal
}
// WebConsoleEnabled says whether web ui is not a disabled feature and asset service is configured.
func (c *MasterConfig) WebConsoleEnabled() bool {
return c.Options.AssetConfig != nil && !c.Options.DisabledFeatures.Has(configapi.FeatureWebConsole)
}
func (c *MasterConfig) WebConsoleStandalone() bool {
return c.Options.AssetConfig.ServingInfo.BindAddress != c.Options.ServingInfo.BindAddress
}