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dataflow.go
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dataflow.go
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package mgr
import (
"errors"
"fmt"
"io"
"os"
"path/filepath"
"strconv"
"strings"
"sync/atomic"
"time"
"github.com/json-iterator/go"
"github.com/qiniu/log"
"github.com/qiniu/pandora-go-sdk/base/reqerr"
"github.com/qiniu/logkit/conf"
"github.com/qiniu/logkit/parser"
. "github.com/qiniu/logkit/parser/config"
"github.com/qiniu/logkit/parser/grok"
"github.com/qiniu/logkit/reader"
"github.com/qiniu/logkit/reader/config"
"github.com/qiniu/logkit/router"
"github.com/qiniu/logkit/sender"
senderConf "github.com/qiniu/logkit/sender/config"
"github.com/qiniu/logkit/transforms"
. "github.com/qiniu/logkit/utils/models"
)
const (
DefaultTryTimes = 3
MetaTmp = "meta_tmp/"
DefaultRawDataBatchLen = 10
RawDataMaxBatchLines = 100
DefaultRawDataSize = 16 * 1024
)
var RawDataTimeOut = 30 * time.Second
// RawData 从 reader 模块中根据 type 获取多条字符串形式的样例日志
func RawData(readerConfig conf.MapConf) ([]string, error) {
if readerConfig == nil {
return nil, errors.New("reader config cannot be empty")
}
runnerName, _ := readerConfig.GetString(GlobalKeyName)
configMetaPath := runnerName + "_" + Hash(strconv.FormatInt(time.Now().Unix(), 10))
metaPath := filepath.Join(MetaTmp, configMetaPath)
log.Debugf("Runner[%v] Using %s as default metaPath", runnerName, metaPath)
readerConfig[config.KeyMetaPath] = metaPath
size, _ := readerConfig.GetIntOr("raw_data_lines", DefaultRawDataBatchLen)
// 控制最大条数为 100
if size > RawDataMaxBatchLines {
size = RawDataMaxBatchLines
}
rd, err := reader.NewReader(readerConfig, true)
if err != nil {
return nil, err
}
defer func() {
rd.Close()
os.RemoveAll(metaPath)
}()
if dr, ok := rd.(reader.DaemonReader); ok {
if err := dr.Start(); err != nil {
return nil, err
}
}
var timeoutStatus int32
// Note: 添加一位缓冲保证 goroutine 在 runner 已经超时的情况下能够正常退出,避免资源泄露
readChan := make(chan dataResult, 1)
go func() {
if dr, ok := rd.(reader.DataReader); ok {
for atomic.LoadInt32(&timeoutStatus) == 0 {
res := readDatas(dr, size, &timeoutStatus)
if len(res.data) == 0 && res.lastErr == nil {
continue
}
readChan <- res
return
}
}
// ReadLine 是可能读到空值的,在接收器宣布超时或读取到数据之前需要不停循环读取
var lastErr error
for atomic.LoadInt32(&timeoutStatus) == 0 {
res := readLines(rd, size, &timeoutStatus)
if (len(res.data) == 0 && res.lastErr == nil) || os.IsNotExist(res.lastErr) {
if res.lastErr != nil {
lastErr = res.lastErr
}
continue
}
readChan <- res
return
}
if atomic.LoadInt32(&timeoutStatus) == 1 {
if lastErr != nil {
readChan <- dataResult{lastErr:lastErr}
return
}
}
}()
var rawData []string
timeout := time.NewTimer(RawDataTimeOut)
defer timeout.Stop()
select {
case de := <-readChan:
rawData, err = de.data, de.lastErr
if err != nil {
return nil, fmt.Errorf("reader %q - error: %v", rd.Name(), err)
}
case <-timeout.C:
atomic.StoreInt32(&timeoutStatus, 1)
return readRawData(readChan, rd.Name())
}
if len(rawData) >= DefaultMaxBatchSize {
err = errors.New("data size large than 2M and will be discard")
return nil, fmt.Errorf("reader %q - error: %v", rd.Name(), err)
}
return rawData, nil
}
//parse模块中各种type的日志都能获取解析后的数据
func ParseData(parserConfig conf.MapConf) (parsedData []Data, err error) {
parserConfig = parser.ConvertWebParserConfig(parserConfig)
if parserConfig == nil {
return nil, errors.New("parser config was empty after web config convet")
}
sampleData, err := getSampleData(parserConfig)
if err != nil {
return nil, err
}
parserRegistry := parser.NewRegistry()
logParser, err := parserRegistry.NewLogParser(parserConfig)
if err != nil {
return nil, err
}
sampleData, err = checkSampleData(sampleData, logParser)
if err != nil {
return nil, err
}
parsedData, err = logParser.Parse(sampleData)
if err != nil {
return parsedData, CheckErr(err)
}
return parsedData, nil
}
func TransformData(transformerConfig map[string]interface{}) ([]Data, error) {
if transformerConfig == nil {
return nil, errors.New("transformer config cannot be empty")
}
create, err := getTransformerCreator(transformerConfig)
if err != nil {
return nil, err
}
data, err := getDataFromTransformConfig(transformerConfig)
if err != nil {
return nil, err
}
transformer, err := getTransformer(transformerConfig, create)
if err != nil {
return nil, err
}
// Transform data
transformedData, transErr := transformer.Transform(data)
se, ok := transErr.(*StatsError)
if ok {
transErr = errors.New(se.LastError)
}
if transErr != nil {
se, ok := transErr.(*StatsError)
if ok {
transErr = errors.New(se.LastError)
}
return nil, fmt.Errorf("transform processing error %v", transErr)
}
return transformedData, nil
}
func SendData(senderConfig map[string]interface{}) error {
if senderConfig == nil {
return errors.New("sender config cannot be empty")
}
sendersConf, err := getSendersConfig(senderConfig)
if err != nil {
return err
}
senders, err := getSenders(sendersConf)
defer os.RemoveAll(filepath.Join(MetaTmp, reader.FtSaveLogPath))
if err != nil {
return err
}
defer func() {
for _, s := range senders {
s.Close()
}
}()
router, err := getRouter(senderConfig, len(senders))
if err != nil {
return err
}
datas, err := getDataFromSenderConfig(senderConfig)
if err != nil {
return err
}
senderDataList := classifySenderData(senders, datas, router)
for index, s := range senders {
if err := trySend(s, senderDataList[index], DefaultTryTimes); err != nil {
return err
}
}
return nil
}
func getSendersConfig(senderConfig map[string]interface{}) ([]conf.MapConf, error) {
config := senderConfig[KeySendConfig]
byteSendersConfig, err := jsoniter.Marshal(config)
if err != nil {
return nil, err
}
var sendersConf []conf.MapConf
if jsonErr := jsoniter.Unmarshal(byteSendersConfig, &sendersConf); jsonErr != nil {
return nil, jsonErr
}
if sendersConf == nil {
return nil, errors.New("sender config cannot be empty")
}
return sendersConf, nil
}
func getDataFromSenderConfig(senderConfig map[string]interface{}) ([]Data, error) {
var datas = []Data{}
rawData := senderConfig[KeySampleLog]
rawDataStr, ok := rawData.(string)
if !ok {
err := fmt.Errorf("missing param %s", KeySampleLog)
return nil, err
}
if rawDataStr == "" {
return nil, errors.New("sender fetched empty sample log")
}
if jsonErr := jsoniter.Unmarshal([]byte(rawDataStr), &datas); jsonErr != nil {
return nil, jsonErr
}
return datas, nil
}
func getSenders(sendersConf []conf.MapConf) ([]sender.Sender, error) {
senders := make([]sender.Sender, 0)
sr := sender.NewRegistry()
ftSaveLogPath := filepath.Join(MetaTmp, reader.FtSaveLogPath)
for i, senderConfig := range sendersConf {
senderConfig[senderConf.KeyFaultTolerant] = "false"
senderConfig[senderConf.KeyFtSaveLogPath] = ftSaveLogPath
senderConfig[senderConf.KeySenderTest] = "true"
s, err := sr.NewSender(senderConfig, "")
if err != nil {
return nil, err
}
senders = append(senders, s)
delete(sendersConf[i], senderConf.InnerUserAgent)
delete(sendersConf[i], senderConf.KeySenderTest)
}
return senders, nil
}
func getRouter(senderConfig map[string]interface{}, senderCnt int) (*router.Router, error) {
routerConf, err := getRouterConfig(senderConfig)
if err != nil {
return nil, err
}
router, err := router.NewSenderRouter(routerConf, senderCnt)
if err != nil {
return nil, fmt.Errorf("sender router error, %v", err)
}
return router, nil
}
func getRouterConfig(senderConfig map[string]interface{}) (router.RouterConfig, error) {
config := senderConfig[KeyRouterConfig]
byteRouterConfig, err := jsoniter.Marshal(config)
if err != nil {
return router.RouterConfig{}, err
}
var routerConfig router.RouterConfig
if jsonErr := jsoniter.Unmarshal(byteRouterConfig, &routerConfig); jsonErr != nil {
return router.RouterConfig{}, jsonErr
}
return routerConfig, nil
}
// trySend 尝试发送数据,如果此时runner退出返回false,其他情况无论是达到最大重试次数还是发送成功,都返回true
func trySend(s sender.Sender, datas []Data, times int) (err error) {
if times <= 0 {
times = DefaultTryTimes
}
if len(datas) <= 0 {
return nil
}
cnt := 0
for {
err = s.Send(datas)
if err == nil {
break
}
if se, ok := err.(*StatsError); ok {
if se.Errors == 0 {
break
}
if se.SendError != nil {
err = se.SendError
}
}
if se, ok := err.(*reqerr.SendError); ok {
datas = sender.ConvertDatas(se.GetFailDatas())
}
cnt++
if cnt < times {
continue
}
err = fmt.Errorf("retry send %v times, but still error %v, discard datas... total %v lines", cnt, err, len(datas))
return err
}
return nil
}
func getSampleData(parserConfig conf.MapConf) ([]string, error) {
parserType, err := parserConfig.GetString(KeyParserType)
if err != nil {
return []string{}, err
}
rawData, _ := parserConfig.GetStringOr(KeySampleLog, "")
var sampleData []string
switch parserType {
case TypeCSV, TypeJSON, TypeRaw, TypeNginx, TypeEmpty, TypeKafkaRest, TypeLogv1:
sampleData = append(sampleData, rawData)
case TypeSyslog:
sampleData = strings.Split(rawData, "\n")
sampleData = append(sampleData, PandoraParseFlushSignal)
case TypeMySQL:
sampleData = strings.Split(rawData, "\n")
sampleData = append(sampleData, PandoraParseFlushSignal)
case TypeGrok:
grokMode, _ := parserConfig.GetString(KeyGrokMode)
if grokMode != grok.ModeMulti {
sampleData = append(sampleData, rawData)
} else {
sampleData = []string{rawData}
}
default:
sampleData = append(sampleData, rawData)
}
return sampleData, nil
}
func checkSampleData(sampleData []string, logParser parser.Parser) ([]string, error) {
if len(sampleData) <= 0 {
_, ok := logParser.(parser.Flushable)
if ok {
sampleData = []string{PandoraParseFlushSignal}
} else {
return nil, errors.New("parser [" + logParser.Name() + "] fetched 0 lines")
}
}
return sampleData, nil
}
func getTransformerCreator(transformerConfig map[string]interface{}) (transforms.Creator, error) {
transformKeyType, ok := transformerConfig[KeyType]
if !ok {
return nil, fmt.Errorf("missing param %s", KeyType)
}
transformKeyTypeStr, ok := transformKeyType.(string)
if !ok {
return nil, fmt.Errorf("param %s must be of type string", KeyType)
}
create, ok := transforms.Transformers[transformKeyTypeStr]
if !ok {
return nil, fmt.Errorf("transformer of type %v not exist", transformKeyTypeStr)
}
return create, nil
}
func getDataFromTransformConfig(transformerConfig map[string]interface{}) ([]Data, error) {
rawData, ok := transformerConfig[KeySampleLog]
if !ok {
return nil, errors.New("missing param " + KeySampleLog)
}
rawDataStr, ok := rawData.(string)
if !ok {
return nil, fmt.Errorf("expect %s string, but got %T", KeySampleLog, rawData)
}
if rawDataStr == "" {
return nil, errors.New("transformer fetched empty sample log")
}
var data = []Data{}
var singleData Data
if jsonErr := jsoniter.Unmarshal([]byte(rawDataStr), &singleData); jsonErr != nil {
if jsonErr = jsoniter.Unmarshal([]byte(rawDataStr), &data); jsonErr != nil {
return nil, jsonErr
}
} else {
// is single log, and method transformer.transform(data []sender.Data) accept a param of slice type
data = append(data, singleData)
}
return data, nil
}
func getTransformer(transConfig map[string]interface{}, create transforms.Creator) (transforms.Transformer, error) {
trans := create()
transformerConfig := convertWebTransformerConfig(transConfig)
delete(transformerConfig, KeySampleLog)
bts, jsonErr := jsoniter.Marshal(transformerConfig)
if jsonErr != nil {
return nil, jsonErr
}
if jsonErr = jsoniter.Unmarshal(bts, trans); jsonErr != nil {
return nil, jsonErr
}
if trans, ok := trans.(transforms.Initializer); ok {
if err := trans.Init(); err != nil {
return nil, err
}
}
return trans, nil
}
type dataResult struct {
data []string
lastErr error
}
func readDatas(dr reader.DataReader, size int, timeoutStatus *int32) dataResult {
var (
batchLen, batchSize int
datas []string
err error
bytes int64
data Data
jsonData []byte
)
datas = make([]string, 0, size)
for !batchFullOrTimeout(batchLen, size, timeoutStatus) {
data, _, err = dr.ReadData()
if err != nil && err != io.EOF {
return dataResult{datas, err}
}
if len(data) < 1 {
log.Debugf("data read got empty data")
time.Sleep(time.Second)
continue
}
jsonData, err = jsoniter.MarshalIndent(data, "", " ")
if err != nil {
break
}
datas = append(datas, string(jsonData))
batchLen++
batchSize += int(bytes)
}
return dataResult{datas, err}
}
func readLines(rd reader.Reader, size int, timeoutStatus *int32) dataResult {
var (
batchLen, batchSize int
line string
err error
)
lines := make([]string, 0, size)
for !batchFullOrTimeout(batchLen, size, timeoutStatus) {
line, err = rd.ReadLine()
if os.IsNotExist(err) {
log.Debugf("data read error: %v", err)
time.Sleep(3 * time.Second)
break
}
if err != nil && err != io.EOF {
return dataResult{lines, err}
}
if err == io.EOF {
err = nil
}
if len(line) < 1 {
log.Debugf("no more content fetched sleep 1 second...")
time.Sleep(time.Second)
continue
}
line = checkLineSize(line, DefaultRawDataSize)
lines = append(lines, line)
batchLen++
batchSize += len(line)
}
return dataResult{lines, err}
}
func batchFullOrTimeout(batchLen, size int, timeoutStatus *int32) bool {
// 达到最大行数
if DefaultRawDataBatchLen > 0 && batchLen >= size {
log.Debugf("meet the max batch length %v", size)
return true
}
if atomic.LoadInt32(timeoutStatus) == 1 {
return true
}
return false
}
func checkLineSize(rawData string, size int) string {
if len(rawData) <= size {
return rawData
}
return rawData[:size] +
fmt.Sprintf(" ......(only show %d bytes, remain %d bytes)",
size, size)
}
// readChan 也是通过 timeoutStatus 判断是否超时,超时之后返回的值需要进一步获取,因此等待一秒之后获取 readChan 的值
func readRawData(readChan chan dataResult, name string) ([]string, error) {
time.Sleep(time.Second)
select {
case rc := <-readChan:
rawData, err := rc.data, rc.lastErr
if err != nil {
return nil, fmt.Errorf("reader %q - error: %v", name, err)
}
return rawData, err
default:
return nil, fmt.Errorf("reader %q read timeout, no data received", name)
}
}