mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-11-21 14:44:00 +00:00
99 lines
3.6 KiB
Go
99 lines
3.6 KiB
Go
package main
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import (
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"flag"
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"fmt"
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"os"
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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/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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)
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var (
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httpListenAddr = flag.String("httpListenAddr", ":8421", "TCP address for exporting metrics at /metrics page")
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src = flag.String("src", "", "Source path with backup on the remote storage. "+
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"Example: gs://bucket/path/to/backup/dir, s3://bucket/path/to/backup/dir or fs:///path/to/local/backup/dir")
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storageDataPath = flag.String("storageDataPath", "victoria-metrics-data", "Destination path where backup must be restored. "+
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"VictoriaMetrics must be stopped when restoring from backup. -storageDataPath dir can be non-empty. In this case the contents of -storageDataPath dir "+
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"is synchronized with -src contents, i.e. it works like 'rsync --delete'")
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concurrency = flag.Int("concurrency", 10, "The number of concurrent workers. Higher concurrency may reduce restore duration")
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maxBytesPerSecond = flagutil.NewBytes("maxBytesPerSecond", 0, "The maximum download speed. There is no limit if it is set to 0")
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skipBackupCompleteCheck = flag.Bool("skipBackupCompleteCheck", false, "Whether to skip checking for 'backup complete' file in -src. This may be useful for restoring from old backups, which were created without 'backup complete' file")
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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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envflag.Parse()
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buildinfo.Init()
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logger.Init()
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logger.Infof("starting http server for exporting metrics at http://%q/metrics", *httpListenAddr)
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go httpserver.Serve(*httpListenAddr, nil)
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srcFS, err := newSrcFS()
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if err != nil {
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logger.Fatalf("%s", err)
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}
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dstFS, err := newDstFS()
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if err != nil {
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logger.Fatalf("%s", err)
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}
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a := &actions.Restore{
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Concurrency: *concurrency,
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Src: srcFS,
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Dst: dstFS,
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SkipBackupCompleteCheck: *skipBackupCompleteCheck,
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}
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if err := a.Run(); err != nil {
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logger.Fatalf("cannot restore from backup: %s", err)
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}
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srcFS.MustStop()
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dstFS.MustStop()
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startTime := time.Now()
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logger.Infof("gracefully shutting down http server for metrics at %q", *httpListenAddr)
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if err := httpserver.Stop(*httpListenAddr); 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 usage() {
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const s = `
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vmrestore restores VictoriaMetrics data from backups made by vmbackup.
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See the docs at https://docs.victoriametrics.com/vmrestore.html .
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`
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flagutil.Usage(s)
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}
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func newDstFS() (*fslocal.FS, error) {
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if len(*storageDataPath) == 0 {
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return nil, fmt.Errorf("`-storageDataPath` cannot be empty")
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}
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fs := &fslocal.FS{
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Dir: *storageDataPath,
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MaxBytesPerSecond: maxBytesPerSecond.N,
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}
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if err := fs.Init(); err != nil {
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return nil, fmt.Errorf("cannot initialize local fs: %w", err)
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}
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return fs, nil
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}
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func newSrcFS() (common.RemoteFS, error) {
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fs, err := actions.NewRemoteFS(*src)
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if err != nil {
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return nil, fmt.Errorf("cannot parse `-src`=%q: %w", *src, err)
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}
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return fs, nil
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}
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