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rump.go
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rump.go
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package run
import (
"fmt"
"math"
"reflect"
"strconv"
"sync"
"pkg/libs/atomic2"
"pkg/libs/log"
"redis-shake/common"
"redis-shake/configure"
"redis-shake/filter"
"redis-shake/metric"
"redis-shake/scanner"
"bytes"
"github.com/garyburd/redigo/redis"
"time"
)
type CmdRump struct {
dumpers []*dbRumper
}
func (cr *CmdRump) GetDetailedInfo() interface{} {
ret := make(map[string]interface{}, len(cr.dumpers))
for _, dumper := range cr.dumpers {
if dumper == nil {
continue
}
ret[dumper.address] = dumper.getStats()
}
// TODO, better to move to the next level
metric.AddMetric(0)
return []map[string]interface{}{
{
"Details": ret,
},
}
}
func (cr *CmdRump) Main() {
cr.dumpers = make([]*dbRumper, len(conf.Options.SourceAddressList))
var wg sync.WaitGroup
wg.Add(len(conf.Options.SourceAddressList))
// build dbRumper
for i, address := range conf.Options.SourceAddressList {
dr := &dbRumper{
id: i,
address: address,
}
cr.dumpers[i] = dr
log.Infof("start dbRumper[%v]", i)
go func() {
defer wg.Done()
dr.run()
}()
}
wg.Wait()
log.Infof("all rumpers finish!, total data: %v", cr.GetDetailedInfo())
}
/*------------------------------------------------------*/
// one rump(1 db or 1 proxy) link corresponding to one dbRumper
type dbRumper struct {
id int // id
address string // source address
client redis.Conn // source client
tencentNodes []string // for tencent cluster only
executors []*dbRumperExecutor
}
func (dr *dbRumper) getStats() map[string]interface{} {
ret := make(map[string]interface{}, len(dr.executors))
for _, exe := range dr.executors {
if exe == nil {
continue
}
id := fmt.Sprintf("%v", exe.executorId)
ret[id] = exe.getStats()
}
return ret
}
func (dr *dbRumper) run() {
// single connection
dr.client = utils.OpenRedisConn([]string{dr.address}, conf.Options.SourceAuthType,
conf.Options.SourcePasswordRaw, false, conf.Options.SourceTLSEnable)
// some clouds may have several db under proxy
count, err := dr.getNode()
if err != nil {
log.Panicf("dbRumper[%v] get node failed[%v]", dr.id, err)
}
log.Infof("dbRumper[%v] get node count: %v", dr.id, count)
dr.executors = make([]*dbRumperExecutor, count)
var wg sync.WaitGroup
wg.Add(count)
for i := 0; i < count; i++ {
var target []string
if conf.Options.TargetType == conf.RedisTypeCluster {
target = conf.Options.TargetAddressList
} else {
// round-robin pick
pick := utils.PickTargetRoundRobin(len(conf.Options.TargetAddressList))
target = []string{conf.Options.TargetAddressList[pick]}
}
var tencentNodeId string
if len(dr.tencentNodes) > 0 {
tencentNodeId = dr.tencentNodes[i]
}
sourceClient := utils.OpenRedisConn([]string{dr.address}, conf.Options.SourceAuthType,
conf.Options.SourcePasswordRaw, false, conf.Options.SourceTLSEnable)
targetClient := utils.OpenRedisConn(target, conf.Options.TargetAuthType,
conf.Options.TargetPasswordRaw, conf.Options.TargetType == conf.RedisTypeCluster,
conf.Options.TargetTLSEnable)
targetBigKeyClient := utils.OpenRedisConn(target, conf.Options.TargetAuthType,
conf.Options.TargetPasswordRaw, conf.Options.TargetType == conf.RedisTypeCluster,
conf.Options.TargetTLSEnable)
executor := NewDbRumperExecutor(dr.id, i, sourceClient, targetClient, targetBigKeyClient, tencentNodeId)
dr.executors[i] = executor
go func() {
defer wg.Done()
executor.exec()
}()
}
wg.Wait()
log.Infof("dbRumper[%v] finished!", dr.id)
}
func (dr *dbRumper) getNode() (int, error) {
switch conf.Options.ScanSpecialCloud {
case utils.AliyunCluster:
info, err := redis.Bytes(dr.client.Do("info", "Cluster"))
if err != nil {
return -1, err
}
result := utils.ParseInfo(info)
if count, err := strconv.ParseInt(result["nodecount"], 10, 0); err != nil {
return -1, err
} else if count <= 0 {
return -1, fmt.Errorf("source node count[%v] illegal", count)
} else {
return int(count), nil
}
case utils.TencentCluster:
var err error
dr.tencentNodes, err = utils.GetAllClusterNode(dr.client, conf.StandAloneRoleMaster, "id")
if err != nil {
return -1, err
}
return len(dr.tencentNodes), nil
default:
return 1, nil
}
}
/*------------------------------------------------------*/
// one executor(1 db only) link corresponding to one dbRumperExecutor
type dbRumperExecutor struct {
rumperId int // father id
executorId int // current id, also == aliyun cluster node id
sourceClient redis.Conn // source client
targetClient redis.Conn // target client
tencentNodeId string // tencent cluster node id
targetBigKeyClient redis.Conn // target client only used in big key, this is a bit ugly
previousDb int // store previous db
keyChan chan *KeyNode // keyChan is used to communicated between routine1 and routine2
resultChan chan *KeyNode // resultChan is used to communicated between routine2 and routine3
scanner scanner.Scanner // one scanner match one db/proxy
fetcherWg sync.WaitGroup
stat dbRumperExexutorStats
dbList []int32 // db list
keyNumber int64 // key in this db number
close bool // is finish?
}
func NewDbRumperExecutor(rumperId, executorId int, sourceClient, targetClient, targetBigKeyClient redis.Conn,
tencentNodeId string) *dbRumperExecutor {
executor := &dbRumperExecutor{
rumperId: rumperId,
executorId: executorId,
sourceClient: sourceClient,
targetClient: targetClient,
tencentNodeId: tencentNodeId,
targetBigKeyClient: targetBigKeyClient,
previousDb: 0,
stat: dbRumperExexutorStats{
minSize: 1 << 30,
maxSize: 0,
sumSize: 0,
},
}
return executor
}
type KeyNode struct {
key string
value string
pttl int64
db int
}
type dbRumperExexutorStats struct {
rBytes atomic2.Int64 // read bytes
rCommands atomic2.Int64 // read commands
wBytes atomic2.Int64 // write bytes
wCommands atomic2.Int64 // write commands
cCommands atomic2.Int64 // confirmed commands
minSize int64 // min package size
maxSize int64 // max package size
sumSize int64 // total package size
}
func (dre *dbRumperExecutor) getStats() map[string]interface{} {
kv := make(map[string]interface{})
// stats -> map
v := reflect.ValueOf(dre.stat)
for i := 0; i < v.NumField(); i++ {
f := v.Field(i)
name := v.Type().Field(i).Name
switch f.Kind() {
case reflect.Struct:
// todo
kv[name] = f.Field(0).Int()
// kv[name] = f.Interface()
case reflect.Int64:
if name == "sumSize" {
continue
}
kv[name] = f.Int()
}
}
kv["keyChan"] = len(dre.keyChan)
kv["resultChan"] = len(dre.resultChan)
kv["avgSize"] = float64(dre.stat.sumSize) / float64(dre.stat.rCommands.Get())
return kv
}
func (dre *dbRumperExecutor) exec() {
// create scanner
dre.scanner = scanner.NewScanner(dre.sourceClient, dre.tencentNodeId, dre.executorId)
if dre.scanner == nil {
log.Panicf("dbRumper[%v] executor[%v] create scanner failed", dre.rumperId, dre.executorId)
return
}
// init two channels
chanSize := int(conf.Options.ScanKeyNumber * 2)
dre.keyChan = make(chan *KeyNode, chanSize)
dre.resultChan = make(chan *KeyNode, chanSize)
// fetch db number from 'info keyspace'
var err error
dre.dbList, dre.keyNumber, err = dre.getSourceDbList()
if err != nil {
log.Panic(err)
}
/*
* we start 4 routines to run:
* 1. fetch keys from the source redis
* 2. write keys into the target redis
* 3. read result from the target redis
*/
// routine1
go dre.fetcher()
// routine3
go dre.writer()
// routine4
go dre.receiver()
// start metric
for range time.NewTicker(1 * time.Second).C {
if dre.close {
break
}
var b bytes.Buffer
fmt.Fprintf(&b, "dbRumper[%v] total = %v(keys) - %10v(keys) [%3d%%] entry=%-12d",
dre.rumperId, dre.keyNumber, dre.stat.cCommands.Get(),
100*dre.stat.cCommands.Get()/dre.keyNumber, dre.stat.wCommands.Get())
log.Info(b.String())
}
log.Infof("dbRumper[%v] executor[%v] finish!", dre.rumperId, dre.executorId)
}
func (dre *dbRumperExecutor) fetcher() {
log.Infof("dbRumper[%v] executor[%v] start fetcher with special-cloud[%v]", dre.rumperId, dre.executorId,
conf.Options.ScanSpecialCloud)
log.Infof("dbRumper[%v] executor[%v] fetch db list: %v", dre.rumperId, dre.executorId, dre.dbList)
// iterate all db nodes
for _, db := range dre.dbList {
if filter.FilterDB(int(db)) {
log.Infof("dbRumper[%v] executor[%v] db[%v] filtered", dre.rumperId, dre.executorId, db)
continue
}
log.Infof("dbRumper[%v] executor[%v] fetch logical db: %v", dre.rumperId, dre.executorId, db)
if err := dre.doFetch(int(db)); err != nil {
log.Panic(err)
}
}
close(dre.keyChan)
}
func (dre *dbRumperExecutor) writer() {
var count uint32
var wBytes int64
var err error
batch := make([]*KeyNode, 0, conf.Options.ScanKeyNumber)
// used in QoS
bucket := utils.StartQoS(conf.Options.Qps)
preDb := 0
preBigKeyDb := 0
for ele := range dre.keyChan {
/*if filter.FilterKey(ele.key) {
continue
}*/
// QoS, limit the qps
<-bucket
if ele.pttl == -1 { // not set ttl
ele.pttl = 0
}
if ele.pttl == -2 {
log.Debugf("dbRumper[%v] executor[%v] skip key %s for expired", dre.rumperId, dre.executorId, ele.key)
continue
}
if conf.Options.TargetDB != -1 {
ele.db = conf.Options.TargetDB
}
log.Debugf("dbRumper[%v] executor[%v] restore[%s], length[%v]", dre.rumperId, dre.executorId, ele.key,
len(ele.value))
if uint64(len(ele.value)) >= conf.Options.BigKeyThreshold {
log.Infof("dbRumper[%v] executor[%v] restore big key[%v] with length[%v], pttl[%v], db[%v]",
dre.rumperId, dre.executorId, ele.key, len(ele.value), ele.pttl, ele.db)
// flush previous cache
batch = dre.writeSend(batch, &count, &wBytes)
// handle big key
utils.RestoreBigkey(dre.targetBigKeyClient, ele.key, ele.value, ele.pttl, ele.db, &preBigKeyDb)
// all the reply has been handled in RestoreBigkey
// dre.resultChan <- ele
continue
}
// send "select" command if db is different
if ele.db != preDb {
dre.targetClient.Send("select", ele.db)
preDb = ele.db
}
if conf.Options.Rewrite {
err = dre.targetClient.Send("RESTORE", ele.key, ele.pttl, ele.value, "REPLACE")
} else {
err = dre.targetClient.Send("RESTORE", ele.key, ele.pttl, ele.value)
}
if err != nil {
log.Panicf("dbRumper[%v] executor[%v] send key[%v] failed[%v]", dre.rumperId, dre.executorId,
ele.key, err)
}
wBytes += int64(len(ele.value))
batch = append(batch, ele)
// move to real send
// dre.resultChan <- ele
count++
if count >= conf.Options.ScanKeyNumber {
// batch
log.Debugf("dbRumper[%v] executor[%v] send keys %d", dre.rumperId, dre.executorId, count)
batch = dre.writeSend(batch, &count, &wBytes)
}
}
dre.writeSend(batch, &count, &wBytes)
close(dre.resultChan)
}
func (dre *dbRumperExecutor) writeSend(batch []*KeyNode, count *uint32, wBytes *int64) []*KeyNode {
newBatch := make([]*KeyNode, 0, conf.Options.ScanKeyNumber)
if len(batch) == 0 {
return newBatch
}
if err := dre.targetClient.Flush(); err != nil {
log.Panicf("dbRumper[%v] executor[%v] flush failed[%v]", dre.rumperId, dre.executorId, err)
}
// real send
for _, ele := range batch {
dre.resultChan <- ele
}
dre.stat.wCommands.Add(int64(*count))
dre.stat.wBytes.Add(*wBytes)
*count = 0
*wBytes = 0
return newBatch
}
func (dre *dbRumperExecutor) receiver() {
for ele := range dre.resultChan {
if _, err := dre.targetClient.Receive(); err != nil && err != redis.ErrNil {
rdbVersion, checksum, checkErr := utils.CheckVersionChecksum(utils.String2Bytes(ele.value))
log.Panicf("dbRumper[%v] executor[%v] restore key[%v] error[%v]: pttl[%v], value length[%v], "+
"rdb version[%v], checksum[%v], check error[%v]",
dre.rumperId, dre.executorId, ele.key, err, strconv.FormatInt(ele.pttl, 10), len(ele.value),
rdbVersion, checksum, checkErr)
}
dre.stat.cCommands.Incr()
}
dre.close = true
}
func (dre *dbRumperExecutor) getSourceDbList() ([]int32, int64, error) {
// tencent cluster only has 1 logical db
if conf.Options.ScanSpecialCloud == utils.TencentCluster {
return []int32{0}, 1, nil
}
conn := dre.sourceClient
if ret, err := conn.Do("info", "keyspace"); err != nil {
return nil, 0, err
} else if mp, err := utils.ParseKeyspace(ret.([]byte)); err != nil {
return nil, 0, err
} else {
list := make([]int32, 0, len(mp))
var total int64
for db, number := range mp {
if number > 0 && !filter.FilterDB(int(db)) {
list = append(list, db)
total += number
}
}
return list, total, nil
}
}
func (dre *dbRumperExecutor) doFetch(db int) error {
// some redis type only has db0, so we add this judge
if db != dre.previousDb {
dre.previousDb = db
// send 'select' command to both source and target
log.Debugf("dbRumper[%v] executor[%v] send source select db", dre.rumperId, dre.executorId)
if _, err := dre.sourceClient.Do("select", db); err != nil {
return err
}
}
// selecting target db is moving into writer
log.Infof("dbRumper[%v] executor[%v] start fetching node db[%v]", dre.rumperId, dre.executorId, db)
for {
rawKeys, err := dre.scanner.ScanKey()
if err != nil {
return err
}
var keys []string
if len(conf.Options.FilterKeyBlacklist) != 0 || len(conf.Options.FilterKeyWhitelist) != 0 {
// filter keys
keys = make([]string, 0, len(rawKeys))
for _, key := range rawKeys {
if filter.FilterKey(key) {
log.Infof("dbRumper[%v] executor[%v] key[%v] filter", dre.rumperId, dre.executorId, key)
continue
}
keys = append(keys, key)
}
} else {
keys = rawKeys
}
log.Debugf("dbRumper[%v] executor[%v] scanned keys number: %v", dre.rumperId, dre.executorId, len(keys))
if len(keys) != 0 {
// pipeline dump
for _, key := range keys {
log.Debugf("dbRumper[%v] executor[%v] scan key: %v", dre.rumperId, dre.executorId, key)
dre.sourceClient.Send("DUMP", key)
}
reply, err := dre.sourceClient.Do("")
dumps, err := redis.Strings(reply, err)
if err != nil && err != redis.ErrNil {
return fmt.Errorf("do dump with failed[%v], reply[%v]", err, reply)
}
// pipeline ttl
for _, key := range keys {
dre.sourceClient.Send("PTTL", key)
}
reply, err = dre.sourceClient.Do("")
pttls, err := redis.Int64s(reply, err)
if err != nil && err != redis.ErrNil {
return fmt.Errorf("do ttl with failed[%v], reply[%v]", err, reply)
}
dre.stat.rCommands.Add(int64(len(keys)))
for i, k := range keys {
length := len(dumps[i])
dre.stat.rBytes.Add(int64(length)) // length of value
dre.stat.minSize = int64(math.Min(float64(dre.stat.minSize), float64(length)))
dre.stat.maxSize = int64(math.Max(float64(dre.stat.maxSize), float64(length)))
dre.stat.sumSize += int64(length)
dre.keyChan <- &KeyNode{k, dumps[i], pttls[i], db}
}
}
// Last iteration of scan.
if dre.scanner.EndNode() {
break
}
}
log.Infof("dbRumper[%v] executor[%v] finish fetching db[%v]", dre.rumperId, dre.executorId, db)
return nil
}