func NewBar() Bar {
b := pb.New(0)
b.SetUnits(pb.U_BYTES)
return Bar{b}
}
func main() {
runtime.GOMAXPROCS(runtime.NumCPU())
c := &Config{}
migrator := Migrator{}
migrator.Config = c
// parse args
_, err := goflags.Parse(c)
if err != nil {
log.Error(err)
return
}
setInitLogging(c.LogLevel)
if len(c.SourceEs) == 0 && len(c.DumpInputFile) == 0 {
log.Error("no input, type --help for more details")
return
}
if len(c.TargetEs) == 0 && len(c.DumpOutFile) == 0 {
log.Error("no output, type --help for more details")
return
}
if c.SourceEs == c.TargetEs && c.SourceIndexNames == c.TargetIndexName {
log.Error("migration output is the same as the output")
return
}
// enough of a buffer to hold all the search results across all workers
migrator.DocChan = make(chan map[string]interface{}, c.DocBufferCount*c.Workers*10)
var srcESVersion *ClusterVersion
// create a progressbar and start a docCount
var outputBar *pb.ProgressBar
var fetchBar = pb.New(1).Prefix("Scroll")
wg := sync.WaitGroup{}
//dealing with input
if len(c.SourceEs) > 0 {
//dealing with basic auth
if len(c.SourceEsAuthStr) > 0 && strings.Contains(c.SourceEsAuthStr, ":") {
authArray := strings.Split(c.SourceEsAuthStr, ":")
auth := Auth{User: authArray[0], Pass: authArray[1]}
migrator.SourceAuth = &auth
}
//get source es version
srcESVersion, errs := migrator.ClusterVersion(c.SourceEs, migrator.SourceAuth, migrator.Config.SourceProxy)
if errs != nil {
return
}
if strings.HasPrefix(srcESVersion.Version.Number, "5.") {
log.Debug("source es is V5,", srcESVersion.Version.Number)
api := new(ESAPIV5)
api.Host = c.SourceEs
api.Auth = migrator.SourceAuth
api.HttpProxy = migrator.Config.SourceProxy
migrator.SourceESAPI = api
} else {
log.Debug("source es is not V5,", srcESVersion.Version.Number)
api := new(ESAPIV0)
api.Host = c.SourceEs
api.Auth = migrator.SourceAuth
api.HttpProxy = migrator.Config.SourceProxy
migrator.SourceESAPI = api
}
if c.ScrollSliceSize < 1 {
c.ScrollSliceSize = 1
}
fetchBar.ShowBar = false
totalSize := 0
finishedSlice := 0
for slice := 0; slice < c.ScrollSliceSize; slice++ {
scroll, err := migrator.SourceESAPI.NewScroll(c.SourceIndexNames, c.ScrollTime, c.DocBufferCount, c.Query, slice, c.ScrollSliceSize)
if err != nil {
log.Error(err)
return
}
totalSize += scroll.Hits.Total
if scroll != nil && scroll.Hits.Docs != nil {
if scroll.Hits.Total == 0 {
log.Error("can't find documents from source.")
return
}
go func() {
wg.Add(1)
//process input
// start scroll
scroll.ProcessScrollResult(&migrator, fetchBar)
// loop scrolling until done
for scroll.Next(&migrator, fetchBar) == false {
}
fetchBar.Finish()
// finished, close doc chan and wait for goroutines to be done
wg.Done()
finishedSlice++
//clean up final results
if finishedSlice == c.ScrollSliceSize {
log.Debug("closing doc chan")
close(migrator.DocChan)
}
}()
}
}
if totalSize > 0 {
fetchBar.Total = int64(totalSize)
fetchBar.ShowBar = true
outputBar = pb.New(totalSize).Prefix("Output ")
}
} else if len(c.DumpInputFile) > 0 {
//read file stream
wg.Add(1)
f, err := os.Open(c.DumpInputFile)
if err != nil {
log.Error(err)
return
}
//get file lines
lineCount := 0
defer f.Close()
r := bufio.NewReader(f)
for {
_, err := r.ReadString('\n')
if io.EOF == err || nil != err {
break
}
lineCount += 1
}
log.Trace("file line,", lineCount)
fetchBar := pb.New(lineCount).Prefix("Read")
outputBar = pb.New(lineCount).Prefix("Output ")
f.Close()
go migrator.NewFileReadWorker(fetchBar, &wg)
}
// start pool
pool, err := pb.StartPool(fetchBar, outputBar)
if err != nil {
panic(err)
}
//dealing with output
if len(c.TargetEs) > 0 {
if len(c.TargetEsAuthStr) > 0 && strings.Contains(c.TargetEsAuthStr, ":") {
authArray := strings.Split(c.TargetEsAuthStr, ":")
auth := Auth{User: authArray[0], Pass: authArray[1]}
migrator.TargetAuth = &auth
}
//get target es version
descESVersion, errs := migrator.ClusterVersion(c.TargetEs, migrator.TargetAuth, migrator.Config.TargetProxy)
if errs != nil {
return
}
if strings.HasPrefix(descESVersion.Version.Number, "5.") {
log.Debug("target es is V5,", descESVersion.Version.Number)
api := new(ESAPIV5)
api.Host = c.TargetEs
api.Auth = migrator.TargetAuth
api.HttpProxy = migrator.Config.TargetProxy
migrator.TargetESAPI = api
} else {
log.Debug("target es is not V5,", descESVersion.Version.Number)
api := new(ESAPIV0)
api.Host = c.TargetEs
api.Auth = migrator.TargetAuth
api.HttpProxy = migrator.Config.TargetProxy
migrator.TargetESAPI = api
}
log.Debug("start process with mappings")
if srcESVersion != nil && c.CopyIndexMappings && descESVersion.Version.Number[0] != srcESVersion.Version.Number[0] {
log.Error(srcESVersion.Version, "=>", descESVersion.Version, ",cross-big-version mapping migration not avaiable, please update mapping manually :(")
return
}
// wait for cluster state to be okay before moving
timer := time.NewTimer(time.Second * 3)
for {
if len(c.SourceEs) > 0 {
if status, ready := migrator.ClusterReady(migrator.SourceESAPI); !ready {
log.Infof("%s at %s is %s, delaying migration ", status.Name, c.SourceEs, status.Status)
<-timer.C
continue
}
}
if len(c.TargetEs) > 0 {
if status, ready := migrator.ClusterReady(migrator.TargetESAPI); !ready {
log.Infof("%s at %s is %s, delaying migration ", status.Name, c.TargetEs, status.Status)
<-timer.C
continue
}
}
timer.Stop()
break
}
if len(c.SourceEs) > 0 {
// get all indexes from source
indexNames, indexCount, sourceIndexMappings, err := migrator.SourceESAPI.GetIndexMappings(c.CopyAllIndexes, c.SourceIndexNames)
if err != nil {
log.Error(err)
return
}
sourceIndexRefreshSettings := map[string]interface{}{}
log.Debugf("indexCount: %d", indexCount)
if indexCount > 0 {
//override indexnames to be copy
c.SourceIndexNames = indexNames
// copy index settings if user asked
if c.CopyIndexSettings || c.ShardsCount > 0 {
log.Info("start settings/mappings migration..")
//get source index settings
var sourceIndexSettings *Indexes
sourceIndexSettings, err := migrator.SourceESAPI.GetIndexSettings(c.SourceIndexNames)
log.Debug("source index settings:", sourceIndexSettings)
if err != nil {
log.Error(err)
return
}
//get target index settings
targetIndexSettings, err := migrator.TargetESAPI.GetIndexSettings(c.TargetIndexName)
if err != nil {
//ignore target es settings error
log.Debug(err)
}
log.Debug("target IndexSettings", targetIndexSettings)
//if there is only one index and we specify the dest indexname
if c.SourceIndexNames != c.TargetIndexName && (len(c.TargetIndexName) > 0) && indexCount == 1 {
log.Debugf("only one index,so we can rewrite indexname, src:%v, dest:%v ,indexCount:%d", c.SourceIndexNames, c.TargetIndexName, indexCount)
(*sourceIndexSettings)[c.TargetIndexName] = (*sourceIndexSettings)[c.SourceIndexNames]
delete(*sourceIndexSettings, c.SourceIndexNames)
log.Debug(sourceIndexSettings)
}
// dealing with indices settings
for name, idx := range *sourceIndexSettings {
log.Debug("dealing with index,name:", name, ",settings:", idx)
tempIndexSettings := getEmptyIndexSettings()
targetIndexExist := false
//if target index settings is exist and we don't copy settings, we use target settings
if targetIndexSettings != nil {
//if target es have this index and we dont copy index settings
if val, ok := (*targetIndexSettings)[name]; ok {
targetIndexExist = true
tempIndexSettings = val.(map[string]interface{})
}
if c.RecreateIndex {
migrator.TargetESAPI.DeleteIndex(name)
targetIndexExist = false
}
}
//copy index settings
if c.CopyIndexSettings {
tempIndexSettings = ((*sourceIndexSettings)[name]).(map[string]interface{})
}
//check map elements
if _, ok := tempIndexSettings["settings"]; !ok {
tempIndexSettings["settings"] = map[string]interface{}{}
}
if _, ok := tempIndexSettings["settings"].(map[string]interface{})["index"]; !ok {
tempIndexSettings["settings"].(map[string]interface{})["index"] = map[string]interface{}{}
}
sourceIndexRefreshSettings[name] = ((*sourceIndexSettings)[name].(map[string]interface{}))["settings"].(map[string]interface{})["index"].(map[string]interface{})["refresh_interval"]
//set refresh_interval
tempIndexSettings["settings"].(map[string]interface{})["index"].(map[string]interface{})["refresh_interval"] = -1
tempIndexSettings["settings"].(map[string]interface{})["index"].(map[string]interface{})["number_of_replicas"] = 0
//clean up settings
delete(tempIndexSettings["settings"].(map[string]interface{})["index"].(map[string]interface{}), "number_of_shards")
//copy indexsettings and mappings
if targetIndexExist {
log.Debug("update index with settings,", name, tempIndexSettings)
//override shard settings
if c.ShardsCount > 0 {
tempIndexSettings["settings"].(map[string]interface{})["index"].(map[string]interface{})["number_of_shards"] = c.ShardsCount
}
err := migrator.TargetESAPI.UpdateIndexSettings(name, tempIndexSettings)
if err != nil {
log.Error(err)
}
} else {
//override shard settings
if c.ShardsCount > 0 {
tempIndexSettings["settings"].(map[string]interface{})["index"].(map[string]interface{})["number_of_shards"] = c.ShardsCount
}
log.Debug("create index with settings,", name, tempIndexSettings)
err := migrator.TargetESAPI.CreateIndex(name, tempIndexSettings)
if err != nil {
log.Error(err)
}
}
}
if c.CopyIndexMappings {
//if there is only one index and we specify the dest indexname
if c.SourceIndexNames != c.TargetIndexName && (len(c.TargetIndexName) > 0) && indexCount == 1 {
log.Debugf("only one index,so we can rewrite indexname, src:%v, dest:%v ,indexCount:%d", c.SourceIndexNames, c.TargetIndexName, indexCount)
(*sourceIndexMappings)[c.TargetIndexName] = (*sourceIndexMappings)[c.SourceIndexNames]
delete(*sourceIndexMappings, c.SourceIndexNames)
log.Debug(sourceIndexMappings)
}
for name, mapping := range *sourceIndexMappings {
err := migrator.TargetESAPI.UpdateIndexMapping(name, mapping.(map[string]interface{})["mappings"].(map[string]interface{}))
if err != nil {
log.Error(err)
}
}
}
log.Info("settings/mappings migration finished.")
}
} else {
log.Error("index not exists,", c.SourceIndexNames)
return
}
defer migrator.recoveryIndexSettings(sourceIndexRefreshSettings)
} else if len(c.DumpInputFile) > 0 {
//check shard settings
//TODO support shard config
}
}
log.Info("start data migration..")
//start es bulk thread
if len(c.TargetEs) > 0 {
log.Debug("start es bulk workers")
outputBar.Prefix("Bulk")
var docCount int
wg.Add(c.Workers)
for i := 0; i < c.Workers; i++ {
go migrator.NewBulkWorker(&docCount, outputBar, &wg)
}
} else if len(c.DumpOutFile) > 0 {
// start file write
outputBar.Prefix("Write")
wg.Add(1)
go migrator.NewFileDumpWorker(outputBar, &wg)
}
wg.Wait()
outputBar.Finish()
// close pool
pool.Stop()
log.Info("data migration finished.")
}