mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-11-23 20:37:12 +01:00
263 lines
8.6 KiB
Go
263 lines
8.6 KiB
Go
package main
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import (
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"flag"
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"fmt"
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"net/url"
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"os"
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"path/filepath"
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"strings"
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"time"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/backup/actions"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/backup/common"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/backup/fslocal"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/backup/fsnil"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/buildinfo"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/envflag"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/flagutil"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/httpserver"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/logger"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/pushmetrics"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/snapshot"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/snapshot/snapshotutil"
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)
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var (
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httpListenAddr = flag.String("httpListenAddr", ":8420", "TCP address for exporting metrics at /metrics page")
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storageDataPath = flag.String("storageDataPath", "victoria-metrics-data", "Path to VictoriaMetrics data. Must match -storageDataPath from VictoriaMetrics or vmstorage")
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snapshotName = flag.String("snapshotName", "", "Name for the snapshot to backup. See https://docs.victoriametrics.com/single-server-victoriametrics/#how-to-work-with-snapshots. There is no need in setting -snapshotName if -snapshot.createURL is set")
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snapshotCreateURL = flag.String("snapshot.createURL", "", "VictoriaMetrics create snapshot url. When this is given a snapshot will automatically be created during backup. "+
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"Example: http://victoriametrics:8428/snapshot/create . There is no need in setting -snapshotName if -snapshot.createURL is set")
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snapshotDeleteURL = flag.String("snapshot.deleteURL", "", "VictoriaMetrics delete snapshot url. Optional. Will be generated from -snapshot.createURL if not provided. "+
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"All created snapshots will be automatically deleted. Example: http://victoriametrics:8428/snapshot/delete")
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dst = flag.String("dst", "", "Where to put the backup on the remote storage. "+
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"Example: gs://bucket/path/to/backup, s3://bucket/path/to/backup, azblob://container/path/to/backup or fs:///path/to/local/backup/dir\n"+
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"-dst can point to the previous backup. In this case incremental backup is performed, i.e. only changed data is uploaded")
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origin = flag.String("origin", "", "Optional origin directory on the remote storage with old backup for server-side copying when performing full backup. This speeds up full backups")
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concurrency = flag.Int("concurrency", 10, "The number of concurrent workers. Higher concurrency may reduce backup duration")
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maxBytesPerSecond = flagutil.NewBytes("maxBytesPerSecond", 0, "The maximum upload speed. There is no limit if it is set to 0")
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)
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func main() {
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// Write flags and help message to stdout, since it is easier to grep or pipe.
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flag.CommandLine.SetOutput(os.Stdout)
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flag.Usage = usage
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flagutil.RegisterSecretFlag("snapshot.createURL")
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flagutil.RegisterSecretFlag("snapshot.deleteURL")
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envflag.Parse()
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buildinfo.Init()
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logger.Init()
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// Storing snapshot delete function to be able to call it in case
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// of error since logger.Fatal will exit the program without
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// calling deferred functions.
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// See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2055
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deleteSnapshot := func() {}
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if len(*snapshotCreateURL) > 0 {
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// create net/url object
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createURL, err := url.Parse(*snapshotCreateURL)
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if err != nil {
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logger.Fatalf("cannot parse snapshotCreateURL: %s", err)
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}
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if len(*snapshotName) > 0 {
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logger.Fatalf("-snapshotName shouldn't be set if -snapshot.createURL is set, since snapshots are created automatically in this case")
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}
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logger.Infof("Snapshot create url %s", createURL.Redacted())
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if len(*snapshotDeleteURL) <= 0 {
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err := flag.Set("snapshot.deleteURL", strings.Replace(*snapshotCreateURL, "/create", "/delete", 1))
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if err != nil {
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logger.Fatalf("Failed to set snapshot.deleteURL flag: %v", err)
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}
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}
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deleteURL, err := url.Parse(*snapshotDeleteURL)
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if err != nil {
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logger.Fatalf("cannot parse snapshotDeleteURL: %s", err)
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}
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logger.Infof("Snapshot delete url %s", deleteURL.Redacted())
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name, err := snapshot.Create(createURL.String())
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if err != nil {
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logger.Fatalf("cannot create snapshot: %s", err)
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}
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err = flag.Set("snapshotName", name)
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if err != nil {
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logger.Fatalf("cannot set snapshotName flag: %v", err)
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}
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deleteSnapshot = func() {
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err := snapshot.Delete(deleteURL.String(), name)
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if err != nil {
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logger.Fatalf("cannot delete snapshot: %s", err)
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}
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}
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}
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listenAddrs := []string{*httpListenAddr}
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go httpserver.Serve(listenAddrs, nil, nil)
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pushmetrics.Init()
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err := makeBackup()
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deleteSnapshot()
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if err != nil {
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logger.Fatalf("cannot create backup: %s", err)
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}
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pushmetrics.Stop()
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startTime := time.Now()
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logger.Infof("gracefully shutting down http server for metrics at %q", listenAddrs)
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if err := httpserver.Stop(listenAddrs); err != nil {
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logger.Fatalf("cannot stop http server for metrics: %s", err)
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}
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logger.Infof("successfully shut down http server for metrics in %.3f seconds", time.Since(startTime).Seconds())
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}
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func makeBackup() error {
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dstFS, err := newDstFS()
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if err != nil {
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return err
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}
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if *snapshotName == "" {
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// Make server-side copy from -origin to -dst
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originFS, err := newRemoteOriginFS()
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if err != nil {
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return err
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}
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a := &actions.RemoteBackupCopy{
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Concurrency: *concurrency,
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Src: originFS,
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Dst: dstFS,
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}
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if err := a.Run(); err != nil {
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return err
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}
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originFS.MustStop()
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} else {
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// Make backup from srcFS to -dst
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srcFS, err := newSrcFS()
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if err != nil {
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return err
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}
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originFS, err := newOriginFS()
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if err != nil {
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return err
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}
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a := &actions.Backup{
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Concurrency: *concurrency,
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Src: srcFS,
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Dst: dstFS,
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Origin: originFS,
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}
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if err := a.Run(); err != nil {
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return err
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}
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srcFS.MustStop()
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originFS.MustStop()
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}
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dstFS.MustStop()
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return nil
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}
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func usage() {
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const s = `
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vmbackup performs backups for VictoriaMetrics data from instant snapshots to gcs, s3, azblob
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or local filesystem. Backed up data can be restored with vmrestore.
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See the docs at https://docs.victoriametrics.com/vmbackup/ .
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`
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flagutil.Usage(s)
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}
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func newSrcFS() (*fslocal.FS, error) {
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if err := snapshotutil.Validate(*snapshotName); err != nil {
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return nil, fmt.Errorf("invalid -snapshotName=%q: %w", *snapshotName, err)
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}
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snapshotPath := filepath.Join(*storageDataPath, "snapshots", *snapshotName)
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// Verify the snapshot exists.
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f, err := os.Open(snapshotPath)
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if err != nil {
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return nil, fmt.Errorf("cannot open snapshot at %q: %w", snapshotPath, err)
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}
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fi, err := f.Stat()
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_ = f.Close()
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if err != nil {
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return nil, fmt.Errorf("cannot stat %q: %w", snapshotPath, err)
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}
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if !fi.IsDir() {
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return nil, fmt.Errorf("snapshot %q must be a directory", snapshotPath)
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}
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fs := &fslocal.FS{
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Dir: snapshotPath,
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MaxBytesPerSecond: maxBytesPerSecond.IntN(),
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}
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if err := fs.Init(); err != nil {
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return nil, fmt.Errorf("cannot initialize fs: %w", err)
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}
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return fs, nil
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}
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func newDstFS() (common.RemoteFS, error) {
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fs, err := actions.NewRemoteFS(*dst)
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if err != nil {
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return nil, fmt.Errorf("cannot parse `-dst`=%q: %w", *dst, err)
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}
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if hasFilepathPrefix(*dst, *storageDataPath) {
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return nil, fmt.Errorf("-dst=%q can not point to the directory with VictoriaMetrics data (aka -storageDataPath=%q)", *dst, *storageDataPath)
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}
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return fs, nil
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}
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func hasFilepathPrefix(path, prefix string) bool {
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if !strings.HasPrefix(path, "fs://") {
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return false
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}
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path = path[len("fs://"):]
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pathAbs, err := filepath.Abs(path)
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if err != nil {
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return false
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}
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prefixAbs, err := filepath.Abs(prefix)
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if err != nil {
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return false
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}
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if prefixAbs == pathAbs {
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return true
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}
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rel, err := filepath.Rel(prefixAbs, pathAbs)
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if err != nil {
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// if paths can't be related - they don't match
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return false
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}
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if i := strings.Index(rel, "."); i == 0 {
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// if path can be related only with . as first char - they still don't match
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return false
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}
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// if paths are related - it is a match
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return true
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}
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func newOriginFS() (common.OriginFS, error) {
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if len(*origin) == 0 {
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return &fsnil.FS{}, nil
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}
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fs, err := actions.NewRemoteFS(*origin)
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if err != nil {
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return nil, fmt.Errorf("cannot parse `-origin`=%q: %w", *origin, err)
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}
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return fs, nil
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}
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func newRemoteOriginFS() (common.RemoteFS, error) {
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if len(*origin) == 0 {
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return nil, fmt.Errorf("-origin cannot be empty when -snapshotName and -snapshot.createURL aren't set")
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}
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fs, err := actions.NewRemoteFS(*origin)
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if err != nil {
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return nil, fmt.Errorf("cannot parse `-origin`=%q: %w", *origin, err)
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}
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return fs, nil
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}
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