123 lines
3.2 KiB
Go
123 lines
3.2 KiB
Go
/*
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Copyright 2017 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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"fmt"
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"os"
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"path/filepath"
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"time"
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"github.com/pkg/errors"
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"github.com/spf13/cobra"
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"github.com/spf13/pflag"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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v1 "github.com/heptio/velero/pkg/apis/velero/v1"
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"github.com/heptio/velero/pkg/client"
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"github.com/heptio/velero/pkg/cmd"
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"github.com/heptio/velero/pkg/cmd/util/downloadrequest"
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)
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func NewDownloadCommand(f client.Factory) *cobra.Command {
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o := NewDownloadOptions()
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c := &cobra.Command{
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Use: "download NAME",
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Short: "Download a backup",
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Args: cobra.ExactArgs(1),
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Run: func(c *cobra.Command, args []string) {
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cmd.CheckError(o.Complete(args))
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cmd.CheckError(o.Validate(c, args, f))
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cmd.CheckError(o.Run(c, f))
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},
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}
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o.BindFlags(c.Flags())
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return c
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}
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type DownloadOptions struct {
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Name string
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Output string
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Force bool
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Timeout time.Duration
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writeOptions int
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}
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func NewDownloadOptions() *DownloadOptions {
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return &DownloadOptions{
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Timeout: time.Minute,
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}
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}
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func (o *DownloadOptions) BindFlags(flags *pflag.FlagSet) {
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flags.StringVarP(&o.Output, "output", "o", o.Output, "path to output file. Defaults to <NAME>-data.tar.gz in the current directory")
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flags.BoolVar(&o.Force, "force", o.Force, "forces the download and will overwrite file if it exists already")
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flags.DurationVar(&o.Timeout, "timeout", o.Timeout, "maximum time to wait to process download request")
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}
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func (o *DownloadOptions) Validate(c *cobra.Command, args []string, f client.Factory) error {
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veleroClient, err := f.Client()
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cmd.CheckError(err)
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if _, err := veleroClient.VeleroV1().Backups(f.Namespace()).Get(o.Name, metav1.GetOptions{}); err != nil {
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return err
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}
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return nil
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}
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func (o *DownloadOptions) Complete(args []string) error {
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o.Name = args[0]
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o.writeOptions = os.O_RDWR | os.O_CREATE | os.O_EXCL
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if o.Force {
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o.writeOptions = os.O_RDWR | os.O_CREATE | os.O_TRUNC
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}
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if o.Output == "" {
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path, err := os.Getwd()
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if err != nil {
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return errors.Wrapf(err, "error getting current directory")
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}
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o.Output = filepath.Join(path, fmt.Sprintf("%s-data.tar.gz", o.Name))
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}
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return nil
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}
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func (o *DownloadOptions) Run(c *cobra.Command, f client.Factory) error {
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veleroClient, err := f.Client()
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cmd.CheckError(err)
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backupDest, err := os.OpenFile(o.Output, o.writeOptions, 0600)
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if err != nil {
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return err
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}
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defer backupDest.Close()
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err = downloadrequest.Stream(veleroClient.VeleroV1(), f.Namespace(), o.Name, v1.DownloadTargetKindBackupContents, backupDest, o.Timeout)
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if err != nil {
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os.Remove(o.Output)
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cmd.CheckError(err)
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}
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fmt.Printf("Backup %s has been successfully downloaded to %s\n", o.Name, backupDest.Name())
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return nil
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}
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