func openReadFile(name string) (*os.File, int64) {
f, err := os.Open(name)
if err != nil {
log.PanicErrorf(err, "cannot open file-reader '%s'", name)
}
s, err := f.Stat()
if err != nil {
log.PanicErrorf(err, "cannot stat file-reader '%s'", name)
}
return f, s.Size()
}
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 openWriteFile(name string) *os.File {
f, err := os.OpenFile(name, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0666)
if err != nil {
log.PanicErrorf(err, "cannot open file-writer '%s'", name)
}
return f
}
func openNetConn(target string) net.Conn {
c, err := net.Dial("tcp", target)
if err != nil {
log.PanicErrorf(err, "cannot connect to '%s'", target)
}
return c
}
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) 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 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()
}
}