func Start(directory string) (*exec.Cmd, error) {
// Get the absolute path if the data directory.
path, err := filepath.Abs(directory)
if err != nil {
return nil, err
}
log.Info("Using postgres data directory %s", path)
command := exec.Command("postgres",
"-D", path,
"-c", "log_destination=stderr",
"-c", "logging_collector=off",
"-k", path)
stdout, err := command.StdoutPipe()
if err != nil {
log.Error("Failed to open postgres stdout, will not be logged.")
stdout = nil
}
stderr, err := command.StderrPipe()
if err != nil {
log.Error("Failed to open postgres stderr, will not be logged.")
stderr = nil
}
err = command.Start()
if err != nil {
log.Error("Failed to start postgres: %v", err)
return nil, err
}
if stdout != nil {
go func() {
if err := ReadPipe(stdout, true, "postgres stdout"); err != nil {
log.Error("Failed to read postgres stdout: %v", err)
}
}()
}
if stderr != nil {
go func() {
if err := ReadPipe(stderr, true, "postgres stderr"); err != nil {
log.Error("Failed to read postgres stderr: %v", err)
}
}()
}
return command, nil
}
// Refresh refreshes all indices logging any error but not returning and
// discarding the response so the caller doesn't have to.
func (es *ElasticSearch) Refresh() {
response, err := es.HttpClient.PostString("_refresh", "application/json", "{}")
if err != nil {
log.Error("Failed to refresh Elastic Search: %v", err)
return
}
io.Copy(ioutil.Discard, response.Body)
}
func (i *Indexer) AddEvent(event eve.RawEveEvent) error {
uuid := uuid.NewV1()
timestamp, err := event.GetTimestamp()
if err != nil {
log.Error("Failed to get timestamp from event: %v", err)
}
encoded, err := json.Marshal(&event)
if err != nil {
log.Error("Failed to encode event.")
}
_, err = i.stmt.Exec(uuid, timestamp, string(encoded))
if err != nil {
log.Fatal(err)
}
return nil
}
func Init(directory string) error {
command := exec.Command("initdb",
"-D", directory,
"--encoding=UTF8")
stdout, err := command.StdoutPipe()
if err != nil {
log.Error("Failed to open initdb stdout, will not be logged.")
stdout = nil
}
stderr, err := command.StderrPipe()
if err != nil {
log.Error("Failed to open initdb stderr, will not be logged.")
stderr = nil
}
err = command.Start()
if err != nil {
log.Error("Failed to start initdb: %v", err)
return err
}
if stdout != nil {
go func() {
if err := ReadPipe(stdout, true, "initdb stdout"); err != nil {
log.Error("Failed to read from stdout: %v", err)
}
}()
}
if stderr != nil {
go func() {
if err := ReadPipe(stderr, true, "initdb stderr"); err != nil {
log.Error("Failed to read from stderr: %v", err)
}
}()
}
return command.Wait()
}
func GetEventByIdHandler(appContext AppContext, r *http.Request) interface{} {
eventId := mux.Vars(r)["id"]
event, err := appContext.EventService.GetEventById(eventId)
if err != nil {
log.Error("%v", err)
return err
}
if event == nil {
return HttpNotFoundResponse(fmt.Sprintf("No event with ID %s", eventId))
}
return event
}
func ArchiveEventHandler(appContext AppContext, r *http.Request) interface{} {
eventId := mux.Vars(r)["id"]
err := appContext.EventService.AddTagsToEvent(eventId,
[]string{"archived", "evebox.archived"})
if err != nil {
log.Error("%v", err)
return err
}
return HttpOkResponse()
}
func DeEscalateEventHandler(appContext AppContext, r *http.Request) interface{} {
eventId := mux.Vars(r)["id"]
err := appContext.EventService.RemoveTagsFromEvent(eventId,
[]string{"escalated", "evebox.escalated"})
if err != nil {
log.Error("%v", err)
return err
}
return HttpOkResponse()
}
func ArchiveHandler(appContext AppContext, r *http.Request) interface{} {
var request AlertGroupQueryParameters
if err := DecodeRequestBody(r, &request); err != nil {
return err
}
err := appContext.DataStore.ArchiveAlertGroup(request.ToCoreAlertGroupQueryParams())
if err != nil {
log.Error("%v", err)
return err
}
return HttpOkResponse()
}
func AlertGroupRemoveTags(appContext AppContext, r *http.Request) interface{} {
var request AlertGroupRemoveTagsRequest
if err := DecodeRequestBody(r, &request); err != nil {
return err
}
err := appContext.EventService.RemoveTagsFromAlertGroup(
request.AlertGroup.ToCoreAlertGroupQueryParams(), request.Tags)
if err != nil {
log.Error("%v", err)
return err
}
return HttpOkResponse()
}
func (b *Bookmarker) Init(end bool) error {
bookmark, err := b.ReadBookmark()
if err == nil && b.BookmarkIsValid(bookmark) {
err = b.Reader.SkipTo(bookmark.Offset)
if err != nil {
log.Error("Failed to skip to line %d, will skip to end of file: %s", err)
b.Reader.SkipToEnd()
}
} else {
log.Info("Failed to read bookmark: %s", err)
if end {
log.Info("Will start reading at end of file.")
b.Reader.SkipToEnd()
} else {
log.Info("Will start reading at beginning of file.")
}
}
// Test write.
bookmark = b.GetBookmark()
return b.WriteBookmark(bookmark)
}
func (s *EventQueryService) EventQuery(options core.EventQueryOptions) (interface{}, error) {
query := NewEventQuery()
query.MustNot(TermQuery("event_type", "stats"))
query.SortBy("@timestamp", "desc")
if options.Size > 0 {
query.Size = options.Size
} else {
query.Size = 500
}
if options.QueryString != "" {
query.AddFilter(QueryString(options.QueryString))
}
if options.MinTs != "" {
query.AddFilter(RangeGte("timestamp", options.MinTs))
}
if options.MaxTs != "" {
query.AddFilter(RangeLte("timestamp", options.MaxTs))
}
if options.EventType != "" {
query.AddFilter(TermQuery("event_type", options.EventType))
}
response, err := s.es.Search(query)
if err != nil {
log.Error("%v", err)
}
hits := response.Hits.Hits
return map[string]interface{}{
"data": hits,
}, nil
}
func (b *Bookmarker) BookmarkIsValid(bookmark *Bookmark) bool {
if bookmark.Path != b.Reader.path {
return false
}
fileInfo, err := b.Reader.GetFileInfo()
if err == nil {
// If the current file size is less than the bookmark file
// size it was likely truncated, invalidate.
if fileInfo.Size() < bookmark.Size {
return false
}
if !SameSys(bookmark.Sys, GetSys(fileInfo)) {
log.Error("Inodes don't match")
}
}
return true
}
func (s FileServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
var path string
if r.URL.String() == "/" {
path = "index.html"
} else {
path = strings.TrimPrefix(r.URL.String(), "/")
}
// Remove any query string parameters...
parts := strings.SplitN(path, "?", 2)
path = parts[0]
log.Info("Static file request for %s.", path)
asset := fmt.Sprintf("public/%s", path)
bytes, err := Asset(asset)
if err != nil {
log.Error("Public file not found: %s", path)
w.WriteHeader(http.StatusNotFound)
} else {
w.Write(bytes)
}
}
func Main(args []string) {
conf := configure(args)
if conf.BatchSize < 1 {
log.Fatal("Batch size must be greater than 0")
}
if conf.Url == "" {
log.Error("error: --elasticsearch is a required parameter")
usage()
os.Exit(1)
}
if conf.InputFilename == "" {
log.Fatal("error: no input file provided")
}
if conf.Bookmark && conf.BookmarkPath == "" {
conf.BookmarkPath = fmt.Sprintf("%s.bookmark", conf.InputFilename)
log.Info("Using bookmark file %s", conf.BookmarkPath)
}
es := elasticsearch.New(conf.Url)
es.DisableCertCheck(conf.DisableCertificateCheck)
if conf.Username != "" || conf.Password != "" {
if err := es.SetUsernamePassword(conf.Username,
conf.Password); err != nil {
log.Fatal("Failed to set username and password: %v", err)
}
}
response, err := es.Ping()
if err != nil {
log.Fatal("error: failed to ping Elastic Search:", err)
}
log.Info("Connected to Elastic Search v%s (cluster:%s; name: %s)",
response.Version.Number, response.ClusterName, response.Name)
majorVersion := response.MajorVersion()
// Check if the template exists.
templateExists, err := es.CheckTemplate(conf.Index)
if !templateExists {
log.Info("Template %s does not exist, creating...", conf.Index)
err = es.LoadTemplate(conf.Index, majorVersion)
if err != nil {
log.Fatal("Failed to create template:", err)
}
} else {
log.Info("Template %s exists, will not create.", conf.Index)
}
var geoipFilter *eve.GeoipFilter
tagsFilter := &eve.TagsFilter{}
if !conf.DisableGeoIp {
geoipdb, err := geoip.NewGeoIpDb(conf.GeoIpDatabase)
if err != nil {
log.Notice("Failed to load GeoIP database: %v", err)
} else {
log.Info("Using GeoIP database %s, %s", geoipdb.Type(), geoipdb.BuildDate())
geoipFilter = eve.NewGeoipFilter(geoipdb)
}
}
indexer := elasticsearch.NewIndexer(es, conf.DisableCertificateCheck)
indexer.IndexPrefix = conf.Index
reader, err := evereader.New(conf.InputFilename)
if err != nil {
log.Fatal(err)
}
// Initialize bookmarking...
var bookmarker *evereader.Bookmarker = nil
if conf.Bookmark {
bookmarker = &evereader.Bookmarker{
Filename: conf.BookmarkPath,
Reader: reader,
}
err := bookmarker.Init(conf.End)
if err != nil {
log.Fatal(err)
}
} else if conf.End {
log.Info("Jumping to end of file.")
err := reader.SkipToEnd()
if err != nil {
log.Fatal(err)
}
}
count := uint64(0)
lastStatTs := time.Now()
lastStatCount := uint64(0)
startTime := time.Now()
// Number of EOFs in last stat interval.
eofs := uint64(0)
go func() {
err := indexer.Run()
if err != nil {
log.Fatal("Elastic Search indexer connection unexpectedly closed:", err)
} else {
log.Debug("Indexer exited without issue.")
}
}()
for {
eof := false
event, err := reader.Next()
if err != nil {
if err == io.EOF {
eof = true
eofs++
} else if _, ok := err.(evereader.MalformedEventError); ok {
log.Error("Failed to read event but will continue: %v", err)
} else {
log.Fatalf("Unrecoverable error reading event: %v", err)
}
}
if event != nil {
if geoipFilter != nil {
geoipFilter.AddGeoIP(event)
}
tagsFilter.Filter(event)
if conf.stdout {
asJson, err := json.Marshal(event)
if err != nil {
log.Error("Failed to print event as json: %v", err)
} else {
fmt.Println(string(asJson))
}
}
indexer.IndexRawEvent(event)
count++
}
if eof || (count > 0 && count%conf.BatchSize == 0) {
var bookmark *evereader.Bookmark = nil
if conf.Bookmark {
bookmark = bookmarker.GetBookmark()
}
response, err := indexer.FlushConnection()
if err != nil {
log.Fatal(err)
}
if response != nil {
log.Debug("Indexed %d events {errors=%v}", len(response.Items),
response.Errors)
}
if conf.Bookmark {
bookmarker.WriteBookmark(bookmark)
}
}
now := time.Now()
if now.Sub(lastStatTs).Seconds() > 1 && now.Second() == 0 {
// Calculate the lag in bytes, that is the number of bytes behind
// the end of file we are.
lag, err := GetLag(reader)
if err != nil {
log.Error("Failed to calculate lag: %v", err)
}
log.Info("Total: %d; Last minute: %d; Avg: %.2f/s, EOFs: %d; Lag (bytes): %d",
count,
count-lastStatCount,
float64(count-lastStatCount)/(now.Sub(lastStatTs).Seconds()),
eofs,
lag)
lastStatTs = now
lastStatCount = count
eofs = 0
}
if eof {
if conf.oneshot {
break
} else {
time.Sleep(1 * time.Second)
}
}
}
totalTime := time.Since(startTime)
if conf.oneshot {
log.Info("Indexed %d events: time=%.2fs; avg=%d/s", count, totalTime.Seconds(),
uint64(float64(count)/totalTime.Seconds()))
}
}
// RemoveTagsFromAlertGroup removes the given tags from all alerts matching
// the provided parameters.
func (s *EventService) RemoveTagsFromAlertGroup(p core.AlertGroupQueryParams, tags []string) error {
filter := []interface{}{
ExistsQuery("event_type"),
KeywordTermQuery("event_type", "alert", s.es.keyword),
RangeQuery{
Field: "timestamp",
Gte: p.MinTimestamp,
Lte: p.MaxTimestamp,
},
KeywordTermQuery("src_ip", p.SrcIP, s.es.keyword),
KeywordTermQuery("dest_ip", p.DstIP, s.es.keyword),
TermQuery("alert.signature_id", p.SignatureID),
}
for _, tag := range tags {
filter = append(filter, TermQuery("tags", tag))
}
query := m{
"query": m{
"bool": m{
"filter": filter,
},
},
"_source": "tags",
"sort": l{
"_doc",
},
"size": 10000,
}
log.Println(util.ToJson(query))
searchResponse, err := s.es.SearchScroll(query, "1m")
if err != nil {
log.Error("Failed to initialize scroll: %v", err)
return err
}
scrollID := searchResponse.ScrollId
for {
log.Debug("Search response total: %d; hits: %d",
searchResponse.Hits.Total, len(searchResponse.Hits.Hits))
if len(searchResponse.Hits.Hits) == 0 {
break
}
// We do this in a retry loop as some documents may fail to be
// updated. Most likely rejected due to max thread count or
// something.
maxRetries := 5
retries := 0
for {
retry, err := bulkUpdateTags(s.es, searchResponse.Hits.Hits,
nil, tags)
if err != nil {
log.Error("BulkAddTags failed: %v", err)
return err
}
if !retry {
break
}
retries++
if retries > maxRetries {
log.Warning("Errors occurred archive events, not all events may have been archived.")
break
}
}
// Get next set of events to archive.
searchResponse, err = s.es.Scroll(scrollID, "1m")
if err != nil {
log.Error("Failed to fetch from scroll: %v", err)
return err
}
}
response, err := s.es.DeleteScroll(scrollID)
if err != nil {
log.Error("Failed to delete scroll id: %v", err)
}
io.Copy(ioutil.Discard, response.Body)
s.es.Refresh()
return nil
}
func Main(args []string) {
var err error
log.Info("This is EveBox Server version %v (rev: %v)", core.BuildVersion, core.BuildRev)
flagset := flag.NewFlagSet("server", flag.ExitOnError)
flagset.StringVarP(&opts.ElasticSearchUri, "elasticsearch", "e", "", "Elastic Search URI (default: http://localhost:9200")
flagset.StringVarP(&opts.ElasticSearchIndex, "index", "i", "", "Elastic Search Index (default: logstash)")
flagset.StringVarP(&opts.Port, "port", "p", "5636", "Port to bind to")
flagset.StringVarP(&opts.Host, "host", "", "0.0.0.0", "Host to bind to")
flagset.StringVarP(&opts.DevServerUri, "dev", "", "", "Frontend development server URI")
flagset.BoolVarP(&opts.Version, "version", "", false, "Show version")
flagset.StringVarP(&opts.Config, "config", "c", "", "Configuration filename")
flagset.BoolVarP(&opts.NoCheckCertificate, "no-check-certificate", "k", false, "Disable certificate check for Elastic Search")
flagset.BoolVarP(&opts.Sqlite, "sqlite", "", false, "Use SQLite for the event store")
flagset.Parse(args[0:])
if opts.Version {
VersionMain()
return
}
log.SetLevel(log.DEBUG)
// If no configuration was provided, see if evebox.yaml exists
// in the current directory.
if opts.Config == "" {
_, err = os.Stat("./evebox.yaml")
if err == nil {
opts.Config = "./evebox.yaml"
}
}
if opts.Config != "" {
log.Printf("Loading configuration file %s.\n", opts.Config)
conf, err = config.LoadConfig(opts.Config)
if err != nil {
log.Fatal(err)
}
}
conf.ElasticSearchIndex = getElasticSearchIndex()
log.Info("Using ElasticSearch Index %s.", conf.ElasticSearchIndex)
appContext := server.AppContext{
Config: conf,
}
elasticSearch := elasticsearch.New(getElasticSearchUrl())
elasticSearch.SetEventIndex(conf.ElasticSearchIndex)
elasticSearch.InitKeyword()
pingResponse, err := elasticSearch.Ping()
if err != nil {
log.Error("Failed to ping Elastic Search: %v", err)
} else {
log.Info("Connected to Elastic Search (version: %s)",
pingResponse.Version.Number)
}
appContext.ElasticSearch = elasticSearch
appContext.EventService = elasticsearch.NewEventService(elasticSearch)
appContext.AlertQueryService = elasticsearch.NewAlertQueryService(elasticSearch)
appContext.EventQueryService = elasticsearch.NewEventQueryService(elasticSearch)
appContext.ReportService = elasticsearch.NewReportService(elasticSearch)
appContext.Vars.DevWebAppServerUrl = opts.DevServerUri
var datastoreType string = "elasticsearch"
if opts.Sqlite {
datastoreType = "sqlite"
}
if datastoreType == "elasticsearch" {
appContext.DataStore, err = elasticsearch.NewDataStore(elasticSearch)
if err != nil {
log.Fatal(err)
}
} else if datastoreType == "sqlite" {
appContext.DataStore, err = sqlite.NewDataStore()
if err != nil {
log.Fatal(err)
}
}
httpServer := server.NewServer(appContext)
err = httpServer.Start(opts.Host + ":" + opts.Port)
if err != nil {
log.Fatal(err)
}
}
func Stop(command *exec.Cmd) {
err := command.Process.Signal(syscall.SIGTERM)
if err != nil {
log.Error("Failed to stop postgres: %v", err)
}
}
// bulkUpdateTags will add and/or remvoe tags from a set of documents using
// the Elastic Search bulk API.
func bulkUpdateTags(es *ElasticSearch, documents []map[string]interface{},
addTags []string, rmTags []string) (bool, error) {
bulk := make([]string, 0)
for _, item := range documents {
doc := JsonMap(item)
currentTags := doc.GetMap("_source").GetAsStrings("tags")
tags := make([]string, 0)
for _, tag := range currentTags {
if rmTags == nil || !StringSliceContains(rmTags, tag) {
tags = append(tags, tag)
}
}
for _, tag := range addTags {
if !StringSliceContains(tags, tag) {
tags = append(tags, tag)
}
}
id := doc.Get("_id").(string)
docType := doc.Get("_type").(string)
index := doc.Get("_index").(string)
command := m{
"update": m{
"_id": id,
"_type": docType,
"_index": index,
},
}
bulk = append(bulk, util.ToJson(command))
partial := m{
"doc": m{
"tags": tags,
},
}
bulk = append(bulk, util.ToJson(partial))
}
// Needs to finish with a new line.
bulk = append(bulk, "")
bulkString := strings.Join(bulk, "\n")
response, err := es.HttpClient.PostString("_bulk", "application/json", bulkString)
if err != nil {
log.Error("Failed to update event tags: %v", err)
return false, err
}
retry := false
if response.StatusCode != http.StatusOK {
return retry, NewElasticSearchError(response)
} else {
bulkResponse := BulkResponse{}
if err := es.Decode(response, &bulkResponse); err != nil {
log.Error("Failed to decode bulk response: %v", err)
} else {
log.Info("Tags updated on %d events; errors=%v",
len(bulkResponse.Items), bulkResponse.Errors)
if bulkResponse.Errors {
retry = true
for _, item := range bulkResponse.Items {
logBulkUpdateError(item)
}
}
}
}
return retry, nil
}
func (h ApiWrapper) ServeHTTP(w http.ResponseWriter, r *http.Request) {
response := h.handler.ServeHTTP(h.appContext, r)
if response != nil {
switch response := response.(type) {
case error:
log.Error("%+v", response)
var message string
switch cause := errors.Cause(response).(type) {
case *elasticsearch.DatastoreError:
message = cause.Message
}
if message == "" {
message = response.Error()
}
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusBadRequest)
encoder := json.NewEncoder(w)
encoder.Encode(HttpStatusResponseBody{
StatusCode: http.StatusBadRequest,
Message: message,
})
case HttpResponse:
statusCode := http.StatusOK
contentType := "application/json"
// Set status code if provided.
if response.statusCode != 0 {
statusCode = response.statusCode
}
// Set content type if provided.
if response.contentType != "" {
contentType = response.contentType
}
// Merge in provided headers.
if response.headers != nil {
for key, val := range response.headers {
log.Info("Setting %s -> %s", key, val)
w.Header().Set(key, val)
}
}
w.Header().Set("Content-Type", contentType)
w.WriteHeader(statusCode)
if response.body != nil {
switch body := response.body.(type) {
case []byte:
w.Write(body)
default:
encoder := json.NewEncoder(w)
encoder.Encode(response.body)
}
}
default:
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusOK)
encoder := json.NewEncoder(w)
encoder.Encode(response)
}
}
}
