/
main.go
160 lines (137 loc) · 3.96 KB
/
main.go
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package main
import (
"context"
"log"
"os"
"reflect"
"strings"
"time"
"github.com/jaegertracing/jaeger/model"
"github.com/jaegertracing/jaeger/pkg/es/wrapper"
"github.com/jaegertracing/jaeger/plugin/storage/es/dependencystore"
"gopkg.in/olivere/elastic.v5"
)
const jaegerSpanPrefix string = "jaeger-span-"
const jaegerDepPrefix string = "jaeger-dependencies-"
const bulkReadSize = 500
type Process struct {
ServiceName string `json:"serviceName"`
}
type Reference struct {
RefType string `json:"refType"`
SpanID string `json:"spanID"`
TraceID string `json:"traceID"`
}
type Span struct {
TraceID string `json:"traceID"`
SpanID string `json:"spanID"`
Process Process `json:"process"`
References []Reference `json:"references"`
}
func IncCount(m map[string]uint64, serviceFrom string, serviceTo string) {
key := serviceFrom + ":" + serviceTo
if _, ok := m[key]; ok {
m[key] += 1
} else {
m[key] = 1
}
}
func GenIndexNameWithPrefix(prefix string) string {
return prefix + time.Now().Format("2006-01-02")
}
func main() {
esUsername := os.Getenv("ES_USERNAME")
esPassword := os.Getenv("ES_PASSWORD")
client, err := elastic.NewSimpleClient(
elastic.SetURL(os.Getenv("ES_HOST")),
elastic.SetBasicAuth(esUsername, esPassword))
if err != nil {
log.Fatal(err.Error())
}
ctx := context.Background()
esIndexPrefix := os.Getenv("ES_INDEX_PREFIX")
if esIndexPrefix != "" {
esIndexPrefix += ":"
}
_, err = client.DeleteIndex(GenIndexNameWithPrefix(esIndexPrefix + jaegerDepPrefix)).Do(ctx)
if err != nil {
log.Println("Warning", err.Error())
}
bulkProcessorService := elastic.NewBulkProcessorService(client)
bulkProcessor, err := bulkProcessorService.Do(ctx)
if err != nil {
log.Fatal(err.Error())
}
esClientWrapper := eswrapper.WrapESClient(client, bulkProcessor)
bq := elastic.NewBoolQuery()
bq.Must(elastic.NewTermQuery("tags.key", "span.kind"))
bq.Must(elastic.NewTermQuery("tags.value", "server"))
serverSpanQuery := elastic.NewNestedQuery("tags", bq)
hasReferenceQuery := elastic.NewExistsQuery("references")
hasReferencesNestedQuery := elastic.NewNestedQuery("references", hasReferenceQuery)
fullQuery := elastic.NewBoolQuery()
fullQuery.Must(hasReferencesNestedQuery, serverSpanQuery)
searchService := client.Scroll(GenIndexNameWithPrefix(esIndexPrefix + jaegerSpanPrefix)).
Type("span").
Query(fullQuery).
Scroll("2m").
Size(bulkReadSize).
IgnoreUnavailable(true)
servicePairToCount := make(map[string]uint64)
for {
searchResult, err := searchService.Do(ctx)
if err != nil {
log.Println("End of stream of spans")
break
}
var ttyp Span
res := searchResult.Each(reflect.TypeOf(ttyp))
for _, span := range res {
if s, ok := span.(Span); ok {
refSpanID := s.References[0].SpanID
parentSpanQuery := elastic.NewTermQuery("spanID", refSpanID)
searchSpanService := client.
Search().
Index(GenIndexNameWithPrefix(esIndexPrefix + jaegerSpanPrefix)).
Type("span").
Query(parentSpanQuery).
IgnoreUnavailable(true)
spanResult, err := searchSpanService.Do(ctx)
if err != nil {
log.Println(err.Error())
continue
}
parentSpan := spanResult.Each(reflect.TypeOf(ttyp))
if len(parentSpan) > 0 {
pSpan := parentSpan[0].(Span)
IncCount(
servicePairToCount,
pSpan.Process.ServiceName,
s.Process.ServiceName)
}
}
}
}
log.Printf("%#v", servicePairToCount)
var dependencies []model.DependencyLink
for s, count := range servicePairToCount {
fromto := strings.SplitN(s, ":", 2)
dependencies = append(
dependencies,
model.DependencyLink{
Parent: fromto[0],
Child: fromto[1],
CallCount: count,
},
)
}
if esIndexPrefix != "" {
esIndexPrefix = strings.TrimSuffix(esIndexPrefix, ":")
}
store := dependencystore.NewDependencyStore(esClientWrapper, nil, esIndexPrefix)
err = store.WriteDependencies(time.Now(), dependencies)
if err != nil {
log.Fatal(err.Error())
}
bulkProcessor.Flush()
}