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delete.go
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delete.go
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/*
Copyright 2017 the Heptio Ark contributors.
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 backup
import (
"bufio"
"errors"
"fmt"
"os"
"strings"
"github.com/heptio/ark/pkg/apis/ark/v1"
"github.com/heptio/ark/pkg/backup"
clientset "github.com/heptio/ark/pkg/generated/clientset/versioned"
"github.com/spf13/cobra"
"github.com/spf13/pflag"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"github.com/heptio/ark/pkg/client"
"github.com/heptio/ark/pkg/cmd"
)
// NewDeleteCommand creates a new command that deletes a backup.
func NewDeleteCommand(f client.Factory, use string) *cobra.Command {
o := &DeleteOptions{}
c := &cobra.Command{
Use: fmt.Sprintf("%s NAME", use),
Short: "Delete a backup",
Args: cobra.ExactArgs(1),
Run: func(c *cobra.Command, args []string) {
cmd.CheckError(o.Complete(f, args))
cmd.CheckError(o.Validate(c, args, f))
cmd.CheckError(o.Run())
},
}
o.BindFlags(c.Flags())
return c
}
// DeleteOptions contains parameters for deleting a backup.
type DeleteOptions struct {
Name string
Confirm bool
client clientset.Interface
namespace string
backup *v1.Backup
}
// BindFlags binds options for this command to flags.
func (o *DeleteOptions) BindFlags(flags *pflag.FlagSet) {
flags.BoolVar(&o.Confirm, "confirm", o.Confirm, "Confirm deletion")
}
// Complete fills out the remainder of the parameters based on user input.
func (o *DeleteOptions) Complete(f client.Factory, args []string) error {
o.Name = args[0]
o.namespace = f.Namespace()
client, err := f.Client()
if err != nil {
return err
}
o.client = client
backup, err := o.client.ArkV1().Backups(f.Namespace()).Get(o.Name, metav1.GetOptions{})
if err != nil {
return err
}
o.backup = backup
return nil
}
// Validate ensures all of the parameters have been filled in correctly.
func (o *DeleteOptions) Validate(c *cobra.Command, args []string, f client.Factory) error {
if o.client == nil {
return errors.New("Ark client is not set; unable to proceed")
}
if o.backup == nil {
return errors.New("backup is not set; unable to proceed")
}
return nil
}
// Run performs the delete backup operation.
func (o *DeleteOptions) Run() error {
if !o.Confirm && !getConfirmation() {
// Don't do anything unless we get confirmation
return nil
}
deleteRequest := backup.NewDeleteBackupRequest(o.backup.Name, string(o.backup.UID))
if _, err := o.client.ArkV1().DeleteBackupRequests(o.namespace).Create(deleteRequest); err != nil {
return err
}
fmt.Printf("Request to delete backup %q submitted successfully.\nThe backup will be fully deleted after all associated data (disk snapshots, backup files, restores) are removed.\n", o.backup.Name)
return nil
}
func getConfirmation() bool {
reader := bufio.NewReader(os.Stdin)
for {
fmt.Printf("Are you sure you want to continue (Y/N)? ")
confirmation, err := reader.ReadString('\n')
if err != nil {
fmt.Fprintf(os.Stderr, "error reading user input: %v\n", err)
return false
}
confirmation = strings.TrimSpace(confirmation)
if len(confirmation) != 1 {
continue
}
switch strings.ToLower(confirmation) {
case "y":
return true
case "n":
return false
}
}
}