143 lines
4.4 KiB
Go
143 lines
4.4 KiB
Go
/*
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Copyright 2018 the Velero contributors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package backup
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import (
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"context"
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"github.com/pkg/errors"
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rbac "k8s.io/api/rbac/v1"
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rbacbeta "k8s.io/api/rbac/v1beta1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/client-go/kubernetes"
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rbacclient "k8s.io/client-go/kubernetes/typed/rbac/v1"
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rbacbetaclient "k8s.io/client-go/kubernetes/typed/rbac/v1beta1"
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)
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// ClusterRoleBindingLister allows for listing ClusterRoleBindings in a version-independent way.
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type ClusterRoleBindingLister interface {
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// List returns a slice of ClusterRoleBindings which can represent either v1 or v1beta1 ClusterRoleBindings.
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List() ([]ClusterRoleBinding, error)
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}
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// noopClusterRoleBindingLister exists to handle clusters where RBAC is disabled.
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type noopClusterRoleBindingLister struct {
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}
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func (noop noopClusterRoleBindingLister) List() ([]ClusterRoleBinding, error) {
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return []ClusterRoleBinding{}, nil
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}
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type v1ClusterRoleBindingLister struct {
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client rbacclient.ClusterRoleBindingInterface
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}
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func (v1 v1ClusterRoleBindingLister) List() ([]ClusterRoleBinding, error) {
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crbList, err := v1.client.List(context.TODO(), metav1.ListOptions{})
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if err != nil {
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return nil, errors.WithStack(err)
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}
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var crbs []ClusterRoleBinding
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for _, crb := range crbList.Items {
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crbs = append(crbs, v1ClusterRoleBinding{crb: crb})
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}
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return crbs, nil
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}
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type v1beta1ClusterRoleBindingLister struct {
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client rbacbetaclient.ClusterRoleBindingInterface
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}
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func (v1beta1 v1beta1ClusterRoleBindingLister) List() ([]ClusterRoleBinding, error) {
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crbList, err := v1beta1.client.List(context.TODO(), metav1.ListOptions{})
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if err != nil {
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return nil, errors.WithStack(err)
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}
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var crbs []ClusterRoleBinding
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for _, crb := range crbList.Items {
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crbs = append(crbs, v1beta1ClusterRoleBinding{crb: crb})
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}
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return crbs, nil
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}
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// NewClusterRoleBindingListerMap creates a map of RBAC version strings to their associated
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// ClusterRoleBindingLister structs.
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// Necessary so that callers to the ClusterRoleBindingLister interfaces don't need the kubernetes.Interface.
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func NewClusterRoleBindingListerMap(clientset kubernetes.Interface) map[string]ClusterRoleBindingLister {
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return map[string]ClusterRoleBindingLister{
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rbac.SchemeGroupVersion.Version: v1ClusterRoleBindingLister{client: clientset.RbacV1().ClusterRoleBindings()},
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rbacbeta.SchemeGroupVersion.Version: v1beta1ClusterRoleBindingLister{client: clientset.RbacV1beta1().ClusterRoleBindings()},
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"": noopClusterRoleBindingLister{},
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}
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}
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// ClusterRoleBinding abstracts access to ClusterRoleBindings whether they're v1 or v1beta1.
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type ClusterRoleBinding interface {
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// Name returns the name of a ClusterRoleBinding.
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Name() string
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// ServiceAccountSubjects returns the names of subjects that are service accounts in the given namespace.
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ServiceAccountSubjects(namespace string) []string
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// RoleRefName returns the name of a ClusterRoleBinding's RoleRef.
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RoleRefName() string
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}
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type v1ClusterRoleBinding struct {
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crb rbac.ClusterRoleBinding
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}
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func (c v1ClusterRoleBinding) Name() string {
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return c.crb.Name
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}
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func (c v1ClusterRoleBinding) RoleRefName() string {
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return c.crb.RoleRef.Name
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}
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func (c v1ClusterRoleBinding) ServiceAccountSubjects(namespace string) []string {
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var saSubjects []string
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for _, s := range c.crb.Subjects {
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if s.Kind == rbac.ServiceAccountKind && s.Namespace == namespace {
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saSubjects = append(saSubjects, s.Name)
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}
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}
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return saSubjects
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}
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type v1beta1ClusterRoleBinding struct {
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crb rbacbeta.ClusterRoleBinding
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}
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func (c v1beta1ClusterRoleBinding) Name() string {
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return c.crb.Name
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}
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func (c v1beta1ClusterRoleBinding) RoleRefName() string {
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return c.crb.RoleRef.Name
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}
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func (c v1beta1ClusterRoleBinding) ServiceAccountSubjects(namespace string) []string {
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var saSubjects []string
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for _, s := range c.crb.Subjects {
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if s.Kind == rbac.ServiceAccountKind && s.Namespace == namespace {
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saSubjects = append(saSubjects, s.Name)
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}
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}
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return saSubjects
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}
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