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Refactor RBAC authorizer entry points

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This change refactors various RBAC authorizer functions to be more
flexible in their inputs.  This makes it easier to reuse the various
components that make up the authorizer.

Signed-off-by: Monis Khan <mkhan@redhat.com>
This commit is contained in:
Monis Khan 2017-08-15 16:32:51 -04:00
parent d2cf96d6ef
commit 8e7893e541
No known key found for this signature in database
GPG Key ID: 52C90ADA01B269B8
5 changed files with 46 additions and 42 deletions
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3
pkg/kubeapiserver/authorizer/BUILD
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@ -20,16 +20,13 @@ go_library(
name = "go_default_library",
srcs = ["config.go"],
deps = [
"//pkg/apis/rbac:go_default_library",
"//pkg/auth/authorizer/abac:go_default_library",
"//pkg/auth/nodeidentifier:go_default_library",
"//pkg/client/informers/informers_generated/internalversion:go_default_library",
"//pkg/client/listers/rbac/internalversion:go_default_library",
"//pkg/kubeapiserver/authorizer/modes:go_default_library",
"//plugin/pkg/auth/authorizer/node:go_default_library",
"//plugin/pkg/auth/authorizer/rbac:go_default_library",
"//plugin/pkg/auth/authorizer/rbac/bootstrappolicy:go_default_library",
"//vendor/k8s.io/apimachinery/pkg/labels:go_default_library",
"//vendor/k8s.io/apiserver/pkg/authorization/authorizer:go_default_library",
"//vendor/k8s.io/apiserver/pkg/authorization/authorizerfactory:go_default_library",
"//vendor/k8s.io/apiserver/pkg/authorization/union:go_default_library",

43
pkg/kubeapiserver/authorizer/config.go
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@ -21,16 +21,13 @@ import (
"fmt"
"time"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apiserver/pkg/authorization/authorizer"
"k8s.io/apiserver/pkg/authorization/authorizerfactory"
"k8s.io/apiserver/pkg/authorization/union"
"k8s.io/apiserver/plugin/pkg/authorizer/webhook"
rbacapi "k8s.io/kubernetes/pkg/apis/rbac"
"k8s.io/kubernetes/pkg/auth/authorizer/abac"
"k8s.io/kubernetes/pkg/auth/nodeidentifier"
informers "k8s.io/kubernetes/pkg/client/informers/informers_generated/internalversion"
rbaclisters "k8s.io/kubernetes/pkg/client/listers/rbac/internalversion"
"k8s.io/kubernetes/pkg/kubeapiserver/authorizer/modes"
"k8s.io/kubernetes/plugin/pkg/auth/authorizer/node"
"k8s.io/kubernetes/plugin/pkg/auth/authorizer/rbac"
@ -57,38 +54,6 @@ type AuthorizationConfig struct {
InformerFactory informers.SharedInformerFactory
}
type roleGetter struct {
lister rbaclisters.RoleLister
}
func (g *roleGetter) GetRole(namespace, name string) (*rbacapi.Role, error) {
return g.lister.Roles(namespace).Get(name)
}
type roleBindingLister struct {
lister rbaclisters.RoleBindingLister
}
func (l *roleBindingLister) ListRoleBindings(namespace string) ([]*rbacapi.RoleBinding, error) {
return l.lister.RoleBindings(namespace).List(labels.Everything())
}
type clusterRoleGetter struct {
lister rbaclisters.ClusterRoleLister
}
func (g *clusterRoleGetter) GetClusterRole(name string) (*rbacapi.ClusterRole, error) {
return g.lister.Get(name)
}
type clusterRoleBindingLister struct {
lister rbaclisters.ClusterRoleBindingLister
}
func (l *clusterRoleBindingLister) ListClusterRoleBindings() ([]*rbacapi.ClusterRoleBinding, error) {
return l.lister.List(labels.Everything())
}
// New returns the right sort of union of multiple authorizer.Authorizer objects
// based on the authorizationMode or an error.
func (config AuthorizationConfig) New() (authorizer.Authorizer, error) {
@ -141,10 +106,10 @@ func (config AuthorizationConfig) New() (authorizer.Authorizer, error) {
authorizers = append(authorizers, webhookAuthorizer)
case modes.ModeRBAC:
rbacAuthorizer := rbac.New(
&roleGetter{config.InformerFactory.Rbac().InternalVersion().Roles().Lister()},
&roleBindingLister{config.InformerFactory.Rbac().InternalVersion().RoleBindings().Lister()},
&clusterRoleGetter{config.InformerFactory.Rbac().InternalVersion().ClusterRoles().Lister()},
&clusterRoleBindingLister{config.InformerFactory.Rbac().InternalVersion().ClusterRoleBindings().Lister()},
&rbac.RoleGetter{Lister: config.InformerFactory.Rbac().InternalVersion().Roles().Lister()},
&rbac.RoleBindingLister{Lister: config.InformerFactory.Rbac().InternalVersion().RoleBindings().Lister()},
&rbac.ClusterRoleGetter{Lister: config.InformerFactory.Rbac().InternalVersion().ClusterRoles().Lister()},
&rbac.ClusterRoleBindingLister{Lister: config.InformerFactory.Rbac().InternalVersion().ClusterRoleBindings().Lister()},
)
authorizers = append(authorizers, rbacAuthorizer)
default:

2
plugin/pkg/auth/authorizer/rbac/BUILD
View File

@ -14,8 +14,10 @@ go_library(
],
deps = [
"//pkg/apis/rbac:go_default_library",
"//pkg/client/listers/rbac/internalversion:go_default_library",
"//pkg/registry/rbac/validation:go_default_library",
"//vendor/github.com/golang/glog:go_default_library",
"//vendor/k8s.io/apimachinery/pkg/labels:go_default_library",
"//vendor/k8s.io/apimachinery/pkg/util/errors:go_default_library",
"//vendor/k8s.io/apiserver/pkg/authentication/user:go_default_library",
"//vendor/k8s.io/apiserver/pkg/authorization/authorizer:go_default_library",

34
plugin/pkg/auth/authorizer/rbac/rbac.go
View File

@ -24,10 +24,12 @@ import (
"bytes"
"k8s.io/apimachinery/pkg/labels"
utilerrors "k8s.io/apimachinery/pkg/util/errors"
"k8s.io/apiserver/pkg/authentication/user"
"k8s.io/apiserver/pkg/authorization/authorizer"
"k8s.io/kubernetes/pkg/apis/rbac"
rbaclisters "k8s.io/kubernetes/pkg/client/listers/rbac/internalversion"
rbacregistryvalidation "k8s.io/kubernetes/pkg/registry/rbac/validation"
)
@ -156,3 +158,35 @@ func RuleAllows(requestAttributes authorizer.Attributes, rule *rbac.PolicyRule)
return rbac.VerbMatches(rule, requestAttributes.GetVerb()) &&
rbac.NonResourceURLMatches(rule, requestAttributes.GetPath())
}
type RoleGetter struct {
Lister rbaclisters.RoleLister
}
func (g *RoleGetter) GetRole(namespace, name string) (*rbac.Role, error) {
return g.Lister.Roles(namespace).Get(name)
}
type RoleBindingLister struct {
Lister rbaclisters.RoleBindingLister
}
func (l *RoleBindingLister) ListRoleBindings(namespace string) ([]*rbac.RoleBinding, error) {
return l.Lister.RoleBindings(namespace).List(labels.Everything())
}
type ClusterRoleGetter struct {
Lister rbaclisters.ClusterRoleLister
}
func (g *ClusterRoleGetter) GetClusterRole(name string) (*rbac.ClusterRole, error) {
return g.Lister.Get(name)
}
type ClusterRoleBindingLister struct {
Lister rbaclisters.ClusterRoleBindingLister
}
func (l *ClusterRoleBindingLister) ListClusterRoleBindings() ([]*rbac.ClusterRoleBinding, error) {
return l.Lister.List(labels.Everything())
}

6
plugin/pkg/auth/authorizer/rbac/subject_locator.go
View File

@ -31,6 +31,12 @@ type RoleToRuleMapper interface {
GetRoleReferenceRules(roleRef rbac.RoleRef, namespace string) ([]rbac.PolicyRule, error)
}
type SubjectLocator interface {
AllowedSubjects(attributes authorizer.Attributes) ([]rbac.Subject, error)
}
var _ = SubjectLocator(&SubjectAccessEvaluator{})
type SubjectAccessEvaluator struct {
superUser string