func (cmd *cmdRestore) Main() {
input, target := args.input, args.target
if len(target) == 0 {
log.Panic("invalid argument: target")
}
if len(input) == 0 {
input = "/dev/stdin"
}
log.Infof("restore from '%s' to '%s'\n", input, target)
var readin io.ReadCloser
var nsize int64
if input != "/dev/stdin" {
readin, nsize = openReadFile(input)
defer readin.Close()
} else {
readin, nsize = os.Stdin, 0
}
reader := bufio.NewReaderSize(ioutils.NewCountReader(readin, &cmd.nread), ReaderBufferSize)
cmd.RestoreRDBFile(reader, target, nsize)
if !args.extra {
return
}
if nsize != 0 && nsize == cmd.nread.Get() {
return
}
cmd.RestoreCommand(reader, target, nsize)
}
func (cmd *cmdDump) Main() {
from, output := args.from, args.output
if len(from) == 0 {
log.Panic("invalid argument: from")
}
if len(output) == 0 {
output = "/dev/stdout"
}
log.Infof("dump from '%s' to '%s'\n", from, output)
var dumpto io.WriteCloser
if output != "/dev/stdout" {
dumpto = openWriteFile(output)
defer dumpto.Close()
} else {
dumpto = os.Stdout
}
master, nsize := cmd.SendCmd(from)
defer master.Close()
log.Infof("rdb file = %d\n", nsize)
reader := bufio.NewReaderSize(master, ReaderBufferSize)
writer := bufio.NewWriterSize(ioutils.NewCountWriter(dumpto, &cmd.ndump), WriterBufferSize)
cmd.DumpRDBFile(reader, writer, nsize)
if !args.extra {
return
}
cmd.DumpCommand(reader, writer)
}
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 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 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()
}
}
