forked from pingcap/br
/
backup_raw.go
209 lines (182 loc) · 5.77 KB
/
backup_raw.go
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// Copyright 2020 PingCAP, Inc. Licensed under Apache-2.0.
package task
import (
"bytes"
"context"
"github.com/pingcap/errors"
kvproto "github.com/pingcap/kvproto/pkg/backup"
"github.com/pingcap/log"
"github.com/spf13/cobra"
"github.com/spf13/pflag"
"go.uber.org/zap"
"github.com/pingcap/br/pkg/backup"
berrors "github.com/pingcap/br/pkg/errors"
"github.com/pingcap/br/pkg/glue"
"github.com/pingcap/br/pkg/rtree"
"github.com/pingcap/br/pkg/storage"
"github.com/pingcap/br/pkg/summary"
"github.com/pingcap/br/pkg/utils"
)
const (
flagKeyFormat = "format"
flagTiKVColumnFamily = "cf"
flagStartKey = "start"
flagEndKey = "end"
)
// RawKvConfig is the common config for rawkv backup and restore.
type RawKvConfig struct {
Config
StartKey []byte `json:"start-key" toml:"start-key"`
EndKey []byte `json:"end-key" toml:"end-key"`
CF string `json:"cf" toml:"cf"`
CompressionConfig
RemoveSchedulers bool `json:"remove-schedulers" toml:"remove-schedulers"`
}
// DefineRawBackupFlags defines common flags for the backup command.
func DefineRawBackupFlags(command *cobra.Command) {
command.Flags().StringP(flagKeyFormat, "", "hex", "start/end key format, support raw|escaped|hex")
command.Flags().StringP(flagTiKVColumnFamily, "", "default", "backup specify cf, correspond to tikv cf")
command.Flags().StringP(flagStartKey, "", "", "backup raw kv start key, key is inclusive")
command.Flags().StringP(flagEndKey, "", "", "backup raw kv end key, key is exclusive")
command.Flags().String(flagCompressionType, "zstd",
"backup sst file compression algorithm, value can be one of 'lz4|zstd|snappy'")
command.Flags().Bool(flagRemoveSchedulers, false,
"disable the balance, shuffle and region-merge schedulers in PD to speed up backup")
// This flag can impact the online cluster, so hide it in case of abuse.
_ = command.Flags().MarkHidden(flagRemoveSchedulers)
}
// ParseFromFlags parses the raw kv backup&restore common flags from the flag set.
func (cfg *RawKvConfig) ParseFromFlags(flags *pflag.FlagSet) error {
format, err := flags.GetString(flagKeyFormat)
if err != nil {
return err
}
start, err := flags.GetString(flagStartKey)
if err != nil {
return err
}
cfg.StartKey, err = utils.ParseKey(format, start)
if err != nil {
return err
}
end, err := flags.GetString(flagEndKey)
if err != nil {
return err
}
cfg.EndKey, err = utils.ParseKey(format, end)
if err != nil {
return err
}
if bytes.Compare(cfg.StartKey, cfg.EndKey) >= 0 {
return errors.Annotate(berrors.ErrBackupInvalidRange, "endKey must be greater than startKey")
}
cfg.CF, err = flags.GetString(flagTiKVColumnFamily)
if err != nil {
return err
}
if err = cfg.Config.ParseFromFlags(flags); err != nil {
return errors.Trace(err)
}
return nil
}
// ParseBackupConfigFromFlags parses the backup-related flags from the flag set.
func (cfg *RawKvConfig) ParseBackupConfigFromFlags(flags *pflag.FlagSet) error {
err := cfg.ParseFromFlags(flags)
if err != nil {
return err
}
compressionCfg, err := parseCompressionFlags(flags)
if err != nil {
return errors.Trace(err)
}
cfg.CompressionConfig = *compressionCfg
cfg.RemoveSchedulers, err = flags.GetBool(flagRemoveSchedulers)
if err != nil {
return errors.Trace(err)
}
level, err := flags.GetInt32(flagCompressionLevel)
if err != nil {
return errors.Trace(err)
}
cfg.CompressionLevel = level
return nil
}
// RunBackupRaw starts a backup task inside the current goroutine.
func RunBackupRaw(c context.Context, g glue.Glue, cmdName string, cfg *RawKvConfig) error {
cfg.adjust()
defer summary.Summary(cmdName)
ctx, cancel := context.WithCancel(c)
defer cancel()
u, err := storage.ParseBackend(cfg.Storage, &cfg.BackendOptions)
if err != nil {
return err
}
mgr, err := NewMgr(ctx, g, cfg.PD, cfg.TLS, GetKeepalive(&cfg.Config), cfg.CheckRequirements)
if err != nil {
return err
}
defer mgr.Close()
client, err := backup.NewBackupClient(ctx, mgr)
if err != nil {
return err
}
if err = client.SetStorage(ctx, u, cfg.SendCreds); err != nil {
return err
}
backupRange := rtree.Range{StartKey: cfg.StartKey, EndKey: cfg.EndKey}
if cfg.RemoveSchedulers {
restore, e := mgr.RemoveSchedulers(ctx)
defer func() {
if ctx.Err() != nil {
log.Warn("context canceled, try shutdown")
ctx = context.Background()
}
if restoreE := restore(ctx); restoreE != nil {
log.Warn("failed to restore removed schedulers, you may need to restore them manually", zap.Error(restoreE))
}
}()
if e != nil {
return err
}
}
// The number of regions need to backup
approximateRegions, err := mgr.GetRegionCount(ctx, backupRange.StartKey, backupRange.EndKey)
if err != nil {
return err
}
summary.CollectInt("backup total regions", approximateRegions)
// Backup
// Redirect to log if there is no log file to avoid unreadable output.
updateCh := g.StartProgress(
ctx, cmdName, int64(approximateRegions), !cfg.LogProgress)
req := kvproto.BackupRequest{
StartVersion: 0,
EndVersion: 0,
RateLimit: cfg.RateLimit,
Concurrency: cfg.Concurrency,
IsRawKv: true,
Cf: cfg.CF,
CompressionType: cfg.CompressionType,
CompressionLevel: cfg.CompressionLevel,
}
files, err := client.BackupRange(ctx, backupRange.StartKey, backupRange.EndKey, req, updateCh)
if err != nil {
return err
}
// Backup has finished
updateCh.Close()
// Checksum
rawRanges := []*kvproto.RawRange{{StartKey: backupRange.StartKey, EndKey: backupRange.EndKey, Cf: cfg.CF}}
backupMeta, err := backup.BuildBackupMeta(&req, files, rawRanges, nil)
if err != nil {
return err
}
err = client.SaveBackupMeta(ctx, &backupMeta)
if err != nil {
return err
}
g.Record("Size", utils.ArchiveSize(&backupMeta))
// Set task summary to success status.
summary.SetSuccessStatus(true)
return nil
}