func newRDBLoader(reader *bufio.Reader, size int) chan *rdb.BinEntry {
pipe := make(chan *rdb.BinEntry, size)
go func() {
defer close(pipe)
l := rdb.NewLoader(reader)
if err := l.Header(); err != nil {
log.PanicError(err, "parse rdb header error")
}
for {
if entry, err := l.NextBinEntry(); err != nil {
log.PanicError(err, "parse rdb entry error")
} else {
if entry != nil {
pipe <- entry
} else {
if err := l.Footer(); err != nil {
log.PanicError(err, "parse rdb checksum error")
}
return
}
}
}
}()
return pipe
}
func openSyncConn(target string, authCode string) (net.Conn, chan int64) {
c := openNetConn(target)
// send auth to master
if len(authCode) > 0 {
cmd := fmt.Sprintf("*2\r\n$4\r\nauth\r\n$%d\r\n%s\r\n", len(authCode), authCode)
if _, err := ioutils.WriteFull(c, []byte(cmd)); err != nil {
log.PanicError(err, "write auth command failed")
}
resp := make([]byte, 5)
if _, err := io.ReadFull(c, resp); err != nil {
log.PanicError(err, "read auth response failed")
}
if string(resp) != "+OK\r\n" {
log.Panic("auth failed")
}
}
if _, err := ioutils.WriteFull(c, []byte("*1\r\n$4\r\nsync\r\n")); err != nil {
log.PanicError(err, "write sync command failed")
}
size := make(chan int64)
go func() {
var rsp string
for {
b := []byte{0}
if _, err := c.Read(b); err != nil {
log.PanicErrorf(err, "read sync response = '%s'", rsp)
}
if len(rsp) == 0 && b[0] == '\n' {
size <- 0
continue
}
rsp += string(b)
if strings.HasSuffix(rsp, "\r\n") {
break
}
}
if rsp[0] != '$' {
log.Panicf("invalid sync response, rsp = '%s'", rsp)
}
n, err := strconv.Atoi(rsp[1 : len(rsp)-2])
if err != nil || n <= 0 {
log.PanicErrorf(err, "invalid sync response = '%s', n = %d", rsp, n)
}
size <- int64(n)
}()
return c, size
}
func MustParse(s string) int64 {
v, err := Parse(s)
if err != nil {
log.PanicError(err, "parse bytesize failed")
}
return v
}
func MustEncodeToBytes(r Resp) []byte {
b, err := EncodeToBytes(r)
if err != nil {
log.PanicError(err, "encode redis resp to bytes failed")
}
return b
}
func MustDecodeFromBytes(p []byte) Resp {
resp, err := DecodeFromBytes(p)
if err != nil {
log.PanicError(err, "decode redis resp from bytes failed")
}
return resp
}
func MustDecode(r *bufio.Reader) Resp {
resp, err := Decode(r)
if err != nil {
log.PanicError(err, "decode redis resp failed")
}
return resp
}
func iocopy(r io.Reader, w io.Writer, p []byte, max int) int {
if max <= 0 || len(p) == 0 {
log.Panicf("invalid max = %d, len(p) = %d", max, len(p))
}
if len(p) > max {
p = p[:max]
}
if n, err := r.Read(p); err != nil {
log.PanicError(err, "read error")
} else {
p = p[:n]
}
if _, err := ioutils.WriteFull(w, p); err != nil {
log.PanicError(err, "write full error")
}
return len(p)
}
func selectDB(c redigo.Conn, db uint32) {
s, err := redigo.String(c.Do("select", db))
if err != nil {
log.PanicError(err, "select command error")
}
if s != "OK" {
log.Panicf("select command response = '%s', should be 'OK'", s)
}
}
func (cmd *cmdRestore) RestoreCommand(reader *bufio.Reader, slave string, nsize int64) {
var forward, nbypass atomic2.Int64
c := openNetConn(slave)
defer c.Close()
writer := bufio.NewWriterSize(c, WriterBufferSize)
defer flushWriter(writer)
discard := bufio.NewReaderSize(c, ReaderBufferSize)
go func() {
var bypass bool = false
for {
resp := redis.MustDecode(reader)
if cmd, args, err := redis.ParseArgs(resp); err != nil {
log.PanicError(err, "parse command arguments failed")
} else if cmd != "ping" {
if cmd == "select" {
if len(args) != 1 {
log.Panicf("select command len(args) = %d", len(args))
}
s := string(args[0])
n, err := parseInt(s, MinDB, MaxDB)
if err != nil {
log.PanicErrorf(err, "parse db = %s failed", s)
}
bypass = !acceptDB(uint32(n))
}
if bypass {
nbypass.Incr()
continue
}
}
redis.MustEncode(writer, resp)
flushWriter(writer)
forward.Incr()
redis.MustDecode(discard)
}
}()
for {
lastForward := forward.Get()
lastByPass := nbypass.Get()
time.Sleep(time.Second)
log.Infof("restore: +forward=%-6d +bypass=%-6d\n", forward.Get()-lastForward, nbypass.Get()-lastByPass)
}
}
func (cmd *cmdSync) Main() {
from, target := args.from, args.target
if len(from) == 0 {
log.Panic("invalid argument: from")
}
if len(target) == 0 {
log.Panic("invalid argument: target")
}
log.Infof("sync from '%s' to '%s'\n", from, target)
var sockfile *os.File
if len(args.sockfile) != 0 {
f, err := pipe.OpenFile(args.sockfile, false)
if err != nil {
log.PanicError(err, "open sockbuff file failed")
}
sockfile = f
}
master, nsize := cmd.SendCmd(from)
defer master.Close()
log.Infof("rdb file = %d\n", nsize)
var input io.Reader
if sockfile != nil {
r, w := pipe.PipeFile(ReaderBufferSize, int(args.filesize), sockfile)
defer r.Close()
go func() {
defer w.Close()
p := make([]byte, ReaderBufferSize)
for {
iocopy(master, w, p, len(p))
}
}()
input = r
} else {
input = master
}
reader := bufio.NewReaderSize(ioutils.NewCountReader(input, &cmd.nread), ReaderBufferSize)
cmd.SyncRDBFile(reader, target, nsize)
cmd.SyncCommand(reader, target)
}
func restoreRdbEntry(c redigo.Conn, e *rdb.BinEntry) {
var ttlms uint64
if e.ExpireAt != 0 {
now := uint64(time.Now().Add(args.shift).UnixNano())
now /= uint64(time.Millisecond)
if now >= e.ExpireAt {
ttlms = 1
} else {
ttlms = e.ExpireAt - now
}
}
s, err := redigo.String(c.Do("slotsrestore", e.Key, ttlms, e.Value))
if err != nil {
log.PanicError(err, "restore command error")
}
if s != "OK" {
log.Panicf("restore command response = '%s', should be 'OK'", s)
}
}
func main() {
usage := `
Usage:
redis-port decode [--ncpu=N] [--parallel=M] [--input=INPUT] [--output=OUTPUT]
redis-port restore [--ncpu=N] [--parallel=M] [--input=INPUT] --target=TARGET [--extra] [--faketime=FAKETIME] [--filterdb=DB]
redis-port dump [--ncpu=N] [--parallel=M] --from=MASTER [--output=OUTPUT] [--extra] [--password=PASSWORD]
redis-port sync [--ncpu=N] [--parallel=M] --from=MASTER --target=TARGET [--sockfile=FILE [--filesize=SIZE]] [--filterdb=DB] [--password=PASSWORD]
Options:
-P PASSWORD, --password Set master's auth code.
-n N, --ncpu=N Set runtime.GOMAXPROCS to N.
-p M, --parallel=M Set the number of parallel routines to M.
-i INPUT, --input=INPUT Set input file, default is stdin ('/dev/stdin').
-o OUTPUT, --output=OUTPUT Set output file, default is stdout ('/dev/stdout').
-f MASTER, --from=MASTER Set host:port of master redis.
-t TARGET, --target=TARGET Set host:port of slave redis.
--faketime=FAKETIME Set current system time to adjust key's expire time.
--sockfile=FILE Use FILE to as socket buffer, default is disabled.
--filesize=SIZE Set FILE size, default value is 1gb.
-e, --extra Set ture to send/receive following redis commands, default is false.
--filterdb=DB Filter db = DB, default is *.
`
d, err := docopt.Parse(usage, nil, true, "", false)
if err != nil {
log.PanicError(err, "parse arguments failed")
}
if s, ok := d["--ncpu"].(string); ok && s != "" {
n, err := parseInt(s, 1, 1024)
if err != nil {
log.PanicErrorf(err, "parse --ncpu failed")
}
runtime.GOMAXPROCS(n)
}
ncpu := runtime.GOMAXPROCS(0)
if s, ok := d["--parallel"].(string); ok && s != "" {
n, err := parseInt(s, 1, 1024)
if err != nil {
log.PanicErrorf(err, "parse --parallel failed")
}
args.parallel = n
}
if ncpu > args.parallel {
args.parallel = ncpu
}
if args.parallel == 0 {
args.parallel = 4
}
args.input, _ = d["--input"].(string)
args.output, _ = d["--output"].(string)
args.target, _ = d["--target"].(string)
args.from, _ = d["--from"].(string)
args.extra, _ = d["--extra"].(bool)
args.sockfile, _ = d["--sockfile"].(string)
args.auth, _ = d["--password"].(string)
if s, ok := d["--faketime"].(string); ok && s != "" {
switch s[0] {
case '-', '+':
d, err := time.ParseDuration(strings.ToLower(s))
if err != nil {
log.PanicError(err, "parse --faketime failed")
}
args.shift = d
case '@':
n, err := strconv.ParseInt(s[1:], 10, 64)
if err != nil {
log.PanicError(err, "parse --faketime failed")
}
args.shift = time.Duration(n*int64(time.Millisecond) - time.Now().UnixNano())
default:
t, err := time.Parse("2006-01-02 15:04:05", s)
if err != nil {
log.PanicError(err, "parse --faketime failed")
}
args.shift = time.Duration(t.UnixNano() - time.Now().UnixNano())
}
}
if s, ok := d["--filterdb"].(string); ok && s != "" && s != "*" {
n, err := parseInt(s, MinDB, MaxDB)
if err != nil {
log.PanicError(err, "parse --filterdb failed")
}
u := uint32(n)
acceptDB = func(db uint32) bool {
return db == u
}
}
if s, ok := d["--filesize"].(string); ok && s != "" {
if len(args.sockfile) == 0 {
log.Panic("please specify --sockfile first")
}
n, err := bytesize.Parse(s)
if err != nil {
log.PanicError(err, "parse --filesize failed")
}
if n <= 0 {
log.Panicf("parse --filesize = %d, invalid number", n)
}
args.filesize = n
} else {
args.filesize = bytesize.GB
}
log.Infof("set ncpu = %d, parallel = %d\n", ncpu, args.parallel)
switch {
case d["decode"].(bool):
new(cmdDecode).Main()
case d["restore"].(bool):
new(cmdRestore).Main()
case d["dump"].(bool):
new(cmdDump).Main()
case d["sync"].(bool):
new(cmdSync).Main()
}
}
func (cmd *cmdSync) SyncCommand(reader *bufio.Reader, slave string) {
var forward, nbypass atomic2.Int64
c := openNetConn(slave)
defer c.Close()
writer := bufio.NewWriterSize(c, WriterBufferSize)
defer flushWriter(writer)
go func() {
p := make([]byte, ReaderBufferSize)
for {
cnt := iocopy(c, ioutil.Discard, p, len(p))
cmd.nrecv.Add(int64(cnt))
}
}()
var mu sync.Mutex
go func() {
for {
time.Sleep(time.Second)
mu.Lock()
flushWriter(writer)
mu.Unlock()
}
}()
go func() {
var bypass bool = false
for {
resp := redis.MustDecode(reader)
if cmd, args, err := redis.ParseArgs(resp); err != nil {
log.PanicError(err, "parse command arguments failed")
} else if cmd != "ping" {
if cmd == "select" {
if len(args) != 1 {
log.Panicf("select command len(args) = %d", len(args))
}
s := string(args[0])
n, err := parseInt(s, MinDB, MaxDB)
if err != nil {
log.PanicErrorf(err, "parse db = %s failed", s)
}
bypass = !acceptDB(uint32(n))
}
if bypass {
nbypass.Incr()
continue
}
}
mu.Lock()
redis.MustEncode(writer, resp)
mu.Unlock()
forward.Incr()
}
}()
for {
lastForward := forward.Get()
lastByPass := nbypass.Get()
lastRead := cmd.nread.Get()
lastRecv := cmd.nrecv.Get()
time.Sleep(time.Second)
log.Infof("sync: +forward=%-6d +bypass=%-6d +read=%-9d +recv=%-9d\n", forward.Get()-lastForward, nbypass.Get()-lastByPass, cmd.nread.Get()-lastRead, cmd.nrecv.Get()-lastRecv)
}
}
func (cmd *cmdDecode) Main() {
input, output := args.input, args.output
if len(input) == 0 {
input = "/dev/stdin"
}
if len(output) == 0 {
output = "/dev/stdout"
}
log.Infof("decode from '%s' to '%s'\n", input, output)
var readin io.ReadCloser
var nsize int64
if input != "/dev/stdin" {
readin, nsize = openReadFile(input)
defer readin.Close()
} else {
readin, nsize = os.Stdin, 0
}
var saveto io.WriteCloser
if output != "/dev/stdout" {
saveto = openWriteFile(output)
defer saveto.Close()
} else {
saveto = os.Stdout
}
reader := bufio.NewReaderSize(ioutils.NewCountReader(readin, &cmd.nread), ReaderBufferSize)
writer := bufio.NewWriterSize(ioutils.NewCountWriter(saveto, &cmd.nsave), WriterBufferSize)
ipipe := newRDBLoader(reader, args.parallel*32)
opipe := make(chan string, cap(ipipe))
go func() {
defer close(opipe)
group := make(chan int, args.parallel)
for i := 0; i < cap(group); i++ {
go func() {
defer func() {
group <- 0
}()
cmd.decoderMain(ipipe, opipe)
}()
}
for i := 0; i < cap(group); i++ {
<-group
}
}()
wait := make(chan struct{})
go func() {
defer close(wait)
for s := range opipe {
if _, err := writer.WriteString(s); err != nil {
log.PanicError(err, "write string failed")
}
flushWriter(writer)
}
}()
for done := false; !done; {
select {
case <-wait:
done = true
case <-time.After(time.Second):
}
n, w, o := cmd.nread.Get(), cmd.nsave.Get(), cmd.nobjs.Get()
if nsize != 0 {
p := 100 * n / nsize
log.Infof("total = %d - %12d [%3d%%] write=%-12d objs=%d\n", nsize, n, p, w, o)
} else {
log.Infof("total = %12d write=%-12d objs=%d\n", n, w, o)
}
}
log.Info("done")
}
func (cmd *cmdDecode) decoderMain(ipipe <-chan *rdb.BinEntry, opipe chan<- string) {
toText := func(p []byte) string {
var b bytes.Buffer
for _, c := range p {
switch {
case c >= '#' && c <= '~':
b.WriteByte(c)
default:
b.WriteByte('.')
}
}
return b.String()
}
toBase64 := func(p []byte) string {
return base64.StdEncoding.EncodeToString(p)
}
toJson := func(o interface{}) string {
b, err := json.Marshal(o)
if err != nil {
log.PanicError(err, "encode to json failed")
}
return string(b)
}
for e := range ipipe {
o, err := rdb.DecodeDump(e.Value)
if err != nil {
log.PanicError(err, "decode failed")
}
var b bytes.Buffer
switch obj := o.(type) {
default:
log.Panicf("unknown object %v", o)
case rdb.String:
o := &struct {
DB uint32 `json:"db"`
Type string `json:"type"`
ExpireAt uint64 `json:"expireat"`
Key string `json:"key"`
Key64 string `json:"key64"`
Value64 string `json:"value64"`
}{
e.DB, "string", e.ExpireAt, toText(e.Key), toBase64(e.Key),
toBase64(obj),
}
fmt.Fprintf(&b, "%s\n", toJson(o))
case rdb.List:
for i, ele := range obj {
o := &struct {
DB uint32 `json:"db"`
Type string `json:"type"`
ExpireAt uint64 `json:"expireat"`
Key string `json:"key"`
Key64 string `json:"key64"`
Index int `json:"index"`
Value64 string `json:"value64"`
}{
e.DB, "list", e.ExpireAt, toText(e.Key), toBase64(e.Key),
i, toBase64(ele),
}
fmt.Fprintf(&b, "%s\n", toJson(o))
}
case rdb.Hash:
for _, ele := range obj {
o := &struct {
DB uint32 `json:"db"`
Type string `json:"type"`
ExpireAt uint64 `json:"expireat"`
Key string `json:"key"`
Key64 string `json:"key64"`
Field string `json:"field"`
Field64 string `json:"field64"`
Value64 string `json:"value64"`
}{
e.DB, "hash", e.ExpireAt, toText(e.Key), toBase64(e.Key),
toText(ele.Field), toBase64(ele.Field), toBase64(ele.Value),
}
fmt.Fprintf(&b, "%s\n", toJson(o))
}
case rdb.Set:
for _, mem := range obj {
o := &struct {
DB uint32 `json:"db"`
Type string `json:"type"`
ExpireAt uint64 `json:"expireat"`
Key string `json:"key"`
Key64 string `json:"key64"`
Member string `json:"member"`
Member64 string `json:"member64"`
}{
e.DB, "set", e.ExpireAt, toText(e.Key), toBase64(e.Key),
toText(mem), toBase64(mem),
}
fmt.Fprintf(&b, "%s\n", toJson(o))
}
case rdb.ZSet:
for _, ele := range obj {
o := &struct {
DB uint32 `json:"db"`
Type string `json:"type"`
ExpireAt uint64 `json:"expireat"`
Key string `json:"key"`
Key64 string `json:"key64"`
Member string `json:"member"`
Member64 string `json:"member64"`
Score float64 `json:"score"`
}{
e.DB, "zset", e.ExpireAt, toText(e.Key), toBase64(e.Key),
toText(ele.Member), toBase64(ele.Member), ele.Score,
}
fmt.Fprintf(&b, "%s\n", toJson(o))
}
}
cmd.nobjs.Incr()
opipe <- b.String()
}
}
func MustEncode(w *bufio.Writer, r Resp) {
if err := Encode(w, r); err != nil {
log.PanicError(err, "encode redis resp failed")
}
}
func flushWriter(w *bufio.Writer) {
if err := w.Flush(); err != nil {
log.PanicError(err, "flush error")
}
}