forked from kubernetes/kubectl
/
create_clusterrolebinding.go
228 lines (193 loc) · 7.48 KB
/
create_clusterrolebinding.go
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/*
Copyright 2016 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package create
import (
"context"
"fmt"
"strings"
"github.com/spf13/cobra"
rbacv1 "k8s.io/api/rbac/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/cli-runtime/pkg/genericclioptions"
"k8s.io/cli-runtime/pkg/genericiooptions"
rbacclientv1 "k8s.io/client-go/kubernetes/typed/rbac/v1"
cmdutil "k8s.io/kubectl/pkg/cmd/util"
"k8s.io/kubectl/pkg/scheme"
"k8s.io/kubectl/pkg/util"
"k8s.io/kubectl/pkg/util/completion"
"k8s.io/kubectl/pkg/util/i18n"
"k8s.io/kubectl/pkg/util/templates"
)
var (
clusterRoleBindingLong = templates.LongDesc(i18n.T(`
Create a cluster role binding for a particular cluster role.`))
clusterRoleBindingExample = templates.Examples(i18n.T(`
# Create a cluster role binding for user1, user2, and group1 using the cluster-admin cluster role
kubectl create clusterrolebinding cluster-admin --clusterrole=cluster-admin --user=user1 --user=user2 --group=group1`))
)
// ClusterRoleBindingOptions is returned by NewCmdCreateClusterRoleBinding
type ClusterRoleBindingOptions struct {
PrintFlags *genericclioptions.PrintFlags
PrintObj func(obj runtime.Object) error
Name string
ClusterRole string
Users []string
Groups []string
ServiceAccounts []string
FieldManager string
CreateAnnotation bool
Client rbacclientv1.RbacV1Interface
DryRunStrategy cmdutil.DryRunStrategy
ValidationDirective string
genericiooptions.IOStreams
}
// NewClusterRoleBindingOptions creates a new *ClusterRoleBindingOptions with sane defaults
func NewClusterRoleBindingOptions(ioStreams genericiooptions.IOStreams) *ClusterRoleBindingOptions {
return &ClusterRoleBindingOptions{
Users: []string{},
Groups: []string{},
ServiceAccounts: []string{},
PrintFlags: genericclioptions.NewPrintFlags("created").WithTypeSetter(scheme.Scheme),
IOStreams: ioStreams,
}
}
// NewCmdCreateClusterRoleBinding returns an initialized command instance of ClusterRoleBinding
func NewCmdCreateClusterRoleBinding(f cmdutil.Factory, ioStreams genericiooptions.IOStreams) *cobra.Command {
o := NewClusterRoleBindingOptions(ioStreams)
cmd := &cobra.Command{
Use: "clusterrolebinding NAME --clusterrole=NAME [--user=username] [--group=groupname] [--serviceaccount=namespace:serviceaccountname] [--dry-run=server|client|none]",
DisableFlagsInUseLine: true,
Short: i18n.T("Create a cluster role binding for a particular cluster role"),
Long: clusterRoleBindingLong,
Example: clusterRoleBindingExample,
Run: func(cmd *cobra.Command, args []string) {
cmdutil.CheckErr(o.Complete(f, cmd, args))
cmdutil.CheckErr(o.Run())
},
}
o.PrintFlags.AddFlags(cmd)
cmdutil.AddApplyAnnotationFlags(cmd)
cmdutil.AddValidateFlags(cmd)
cmdutil.AddDryRunFlag(cmd)
cmd.Flags().StringVar(&o.ClusterRole, "clusterrole", "", i18n.T("ClusterRole this ClusterRoleBinding should reference"))
cmd.MarkFlagRequired("clusterrole")
cmd.Flags().StringArrayVar(&o.Users, "user", o.Users, "Usernames to bind to the clusterrole. The flag can be repeated to add multiple users.")
cmd.Flags().StringArrayVar(&o.Groups, "group", o.Groups, "Groups to bind to the clusterrole. The flag can be repeated to add multiple groups.")
cmd.Flags().StringArrayVar(&o.ServiceAccounts, "serviceaccount", o.ServiceAccounts, "Service accounts to bind to the clusterrole, in the format <namespace>:<name>. The flag can be repeated to add multiple service accounts.")
cmdutil.AddFieldManagerFlagVar(cmd, &o.FieldManager, "kubectl-create")
// Completion for relevant flags
cmdutil.CheckErr(cmd.RegisterFlagCompletionFunc(
"clusterrole",
func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
return completion.CompGetResource(f, "clusterrole", toComplete), cobra.ShellCompDirectiveNoFileComp
}))
return cmd
}
// Complete completes all the required options
func (o *ClusterRoleBindingOptions) Complete(f cmdutil.Factory, cmd *cobra.Command, args []string) error {
var err error
o.Name, err = NameFromCommandArgs(cmd, args)
if err != nil {
return err
}
cs, err := f.KubernetesClientSet()
if err != nil {
return err
}
o.Client = cs.RbacV1()
o.CreateAnnotation = cmdutil.GetFlagBool(cmd, cmdutil.ApplyAnnotationsFlag)
o.DryRunStrategy, err = cmdutil.GetDryRunStrategy(cmd)
if err != nil {
return err
}
cmdutil.PrintFlagsWithDryRunStrategy(o.PrintFlags, o.DryRunStrategy)
printer, err := o.PrintFlags.ToPrinter()
if err != nil {
return err
}
o.PrintObj = func(obj runtime.Object) error {
return printer.PrintObj(obj, o.Out)
}
o.ValidationDirective, err = cmdutil.GetValidationDirective(cmd)
if err != nil {
return err
}
return nil
}
// Run calls the CreateSubcommandOptions.Run in ClusterRoleBindingOptions instance
func (o *ClusterRoleBindingOptions) Run() error {
clusterRoleBinding, err := o.createClusterRoleBinding()
if err != nil {
return err
}
if err := util.CreateOrUpdateAnnotation(o.CreateAnnotation, clusterRoleBinding, scheme.DefaultJSONEncoder()); err != nil {
return err
}
if o.DryRunStrategy != cmdutil.DryRunClient {
createOptions := metav1.CreateOptions{}
if o.FieldManager != "" {
createOptions.FieldManager = o.FieldManager
}
createOptions.FieldValidation = o.ValidationDirective
if o.DryRunStrategy == cmdutil.DryRunServer {
createOptions.DryRun = []string{metav1.DryRunAll}
}
var err error
clusterRoleBinding, err = o.Client.ClusterRoleBindings().Create(context.TODO(), clusterRoleBinding, createOptions)
if err != nil {
return fmt.Errorf("failed to create clusterrolebinding: %v", err)
}
}
return o.PrintObj(clusterRoleBinding)
}
func (o *ClusterRoleBindingOptions) createClusterRoleBinding() (*rbacv1.ClusterRoleBinding, error) {
clusterRoleBinding := &rbacv1.ClusterRoleBinding{
TypeMeta: metav1.TypeMeta{APIVersion: rbacv1.SchemeGroupVersion.String(), Kind: "ClusterRoleBinding"},
ObjectMeta: metav1.ObjectMeta{
Name: o.Name,
},
RoleRef: rbacv1.RoleRef{
APIGroup: rbacv1.GroupName,
Kind: "ClusterRole",
Name: o.ClusterRole,
},
}
for _, user := range o.Users {
clusterRoleBinding.Subjects = append(clusterRoleBinding.Subjects, rbacv1.Subject{
Kind: rbacv1.UserKind,
APIGroup: rbacv1.GroupName,
Name: user,
})
}
for _, group := range o.Groups {
clusterRoleBinding.Subjects = append(clusterRoleBinding.Subjects, rbacv1.Subject{
Kind: rbacv1.GroupKind,
APIGroup: rbacv1.GroupName,
Name: group,
})
}
for _, sa := range o.ServiceAccounts {
tokens := strings.Split(sa, ":")
if len(tokens) != 2 || tokens[0] == "" || tokens[1] == "" {
return nil, fmt.Errorf("serviceaccount must be <namespace>:<name>")
}
clusterRoleBinding.Subjects = append(clusterRoleBinding.Subjects, rbacv1.Subject{
Kind: rbacv1.ServiceAccountKind,
APIGroup: "",
Namespace: tokens[0],
Name: tokens[1],
})
}
return clusterRoleBinding, nil
}