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restore_raw.go
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restore_raw.go
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// Copyright 2020 PingCAP, Inc. Licensed under Apache-2.0.
package task
import (
"context"
"github.com/coreos/go-semver/semver"
"github.com/pingcap/errors"
"github.com/pingcap/kvproto/pkg/kvrpcpb"
"github.com/pingcap/log"
"github.com/spf13/cobra"
"github.com/tikv/client-go/v2/rawkv"
"github.com/tikv/migration/br/pkg/checksum"
berrors "github.com/tikv/migration/br/pkg/errors"
"github.com/tikv/migration/br/pkg/feature"
"github.com/tikv/migration/br/pkg/glue"
"github.com/tikv/migration/br/pkg/metautil"
"github.com/tikv/migration/br/pkg/restore"
"github.com/tikv/migration/br/pkg/summary"
"github.com/tikv/migration/br/pkg/utils"
"go.uber.org/zap"
)
// DefineRawRestoreFlags defines common flags for the backup command.
func DefineRawRestoreFlags(command *cobra.Command) {
command.Flags().StringP(flagKeyFormat, "", "hex", "start/end key format, support raw|escaped|hex")
command.Flags().StringP(flagStartKey, "", "", "restore raw kv start key, key is inclusive")
command.Flags().StringP(flagEndKey, "", "", "restore raw kv end key, key is exclusive")
DefineRestoreCommonFlags(command.PersistentFlags())
}
// RunRestoreRaw starts a raw kv restore task inside the current goroutine.
func RunRestoreRaw(c context.Context, g glue.Glue, cmdName string, cfg *RestoreRawConfig) (err error) {
cfg.adjust()
defer summary.Summary(cmdName)
ctx, cancel := context.WithCancel(c)
defer cancel()
mgr, err := NewMgr(ctx, g, cfg.PD, cfg.TLS, GetKeepalive(&cfg.Config), cfg.CheckRequirements)
if err != nil {
return errors.Trace(err)
}
defer mgr.Close()
clusterVersion, err := mgr.GetClusterVersion(ctx)
if err != nil {
return errors.Trace(err)
}
featureGate := feature.NewFeatureGate(semver.New(clusterVersion))
if cfg.Checksum && !featureGate.IsEnabled(feature.Checksum) {
log.Error("TiKV cluster does not support checksum, please disable checksum", zap.String("version", clusterVersion))
return errors.Errorf("Current tikv cluster version %s does not support checksum, please disable checksum", clusterVersion)
}
keepaliveCfg := GetKeepalive(&cfg.Config)
// sometimes we have pooled the connections.
// sending heartbeats in idle times is useful.
keepaliveCfg.PermitWithoutStream = true
client, err := restore.NewRestoreClient(mgr.GetPDClient(), mgr.GetTLSConfig(), keepaliveCfg, true)
if err != nil {
return errors.Trace(err)
}
defer client.Close()
client.SetRateLimit(cfg.RateLimit)
client.SetCrypter(&cfg.CipherInfo)
client.SetConcurrency(uint(cfg.Concurrency))
if cfg.Online {
client.EnableOnline()
}
client.SetSwitchModeInterval(cfg.SwitchModeInterval)
u, s, backupMeta, err := ReadBackupMeta(ctx, metautil.MetaFile, &cfg.Config)
if err != nil {
return errors.Trace(err)
}
if client.GetAPIVersion() != backupMeta.ApiVersion {
return errors.Errorf("Unsupported backup api version, backup meta: %s, dst:%s",
backupMeta.ApiVersion.String(), client.GetAPIVersion().String())
}
// for restore, dst and cur are the same.
cfg.DstAPIVersion = client.GetAPIVersion().String()
cfg.adjustBackupRange(backupMeta.ApiVersion)
reader := metautil.NewMetaReader(backupMeta, s, &cfg.CipherInfo)
if err = client.InitBackupMeta(c, backupMeta, u, s, reader); err != nil {
return errors.Trace(err)
}
if !client.IsRawKvMode() {
return errors.Annotate(berrors.ErrRestoreModeMismatch, "cannot do raw restore from transactional data")
}
files, err := client.GetFilesInRawRange(cfg.StartKey, cfg.EndKey, "default")
if err != nil {
return errors.Trace(err)
}
archiveSize := reader.ArchiveSize(ctx, files)
g.Record(summary.RestoreDataSize, archiveSize)
if len(files) == 0 {
log.Info("all files are filtered out from the backup archive, nothing to restore")
return nil
}
summary.CollectInt("restore files", len(files))
ranges, _, err := restore.MergeFileRanges(
files, cfg.MergeSmallRegionKeyCount, cfg.MergeSmallRegionKeyCount)
if err != nil {
return errors.Trace(err)
}
// Redirect to log if there is no log file to avoid unreadable output.
updateCh := g.StartProgress(
ctx,
"Raw Restore",
// Split/Scatter + Download/Ingest.
// Regard split region as one step as it finish quickly compared to ingest.
int64(1+len(files)),
!cfg.LogProgress)
// RawKV restore does not need to rewrite keys.
if featureGate.IsEnabled(feature.SplitRegion) {
needEncodeKey := (cfg.DstAPIVersion == kvrpcpb.APIVersion_V2.String())
err = restore.SplitRanges(ctx, client, ranges, nil, updateCh, true, needEncodeKey)
if err != nil {
return errors.Trace(err)
}
}
restoreSchedulers, err := restorePreWork(ctx, client, mgr)
if err != nil {
return errors.Trace(err)
}
defer restorePostWork(ctx, client, restoreSchedulers)
// raw key without encoding
keyRanges := make([]*utils.KeyRange, 0, len(files))
for _, file := range files {
keyRanges = append(keyRanges, &utils.KeyRange{
Start: file.StartKey,
End: file.EndKey,
})
}
err = client.RestoreRaw(ctx, cfg.StartKey, cfg.EndKey, files, updateCh)
if err != nil {
return errors.Trace(err)
}
// Restore has finished.
updateCh.Close()
if cfg.Checksum {
finalChecksum := rawkv.RawChecksum{}
for _, file := range files {
checksum.UpdateChecksum(&finalChecksum, file.Crc64Xor, file.TotalKvs, file.TotalBytes)
}
executor, err := checksum.NewExecutor(ctx, keyRanges, cfg.PD,
backupMeta.ApiVersion, cfg.ChecksumConcurrency, cfg.TLS)
if err != nil {
return errors.Trace(err)
}
defer executor.Close()
err = checksum.Run(ctx, cmdName, executor,
checksum.StorageChecksumCommand, finalChecksum)
if err != nil {
return errors.Trace(err)
}
}
// Set task summary to success status.
summary.SetSuccessStatus(true)
return nil
}