Experimental feature: elastic exporter (#713)

agent/pkg/api/main.go

@@ -5,6 +5,7 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
+	"mizuserver/pkg/elastic"
 	"mizuserver/pkg/har"
 	"mizuserver/pkg/holder"
 	"mizuserver/pkg/providers"
@@ -16,14 +17,15 @@ import (
 
 	"mizuserver/pkg/servicemap"
 
-	"github.com/up9inc/mizu/shared"
-	"github.com/up9inc/mizu/shared/logger"
-	tapApi "github.com/up9inc/mizu/tap/api"
 	"mizuserver/pkg/models"
 	"mizuserver/pkg/oas"
 	"mizuserver/pkg/resolver"
 	"mizuserver/pkg/utils"
 
+	"github.com/up9inc/mizu/shared"
+	"github.com/up9inc/mizu/shared/logger"
+	tapApi "github.com/up9inc/mizu/tap/api"
+
 	basenine "github.com/up9inc/basenine/client/go"
 )
 
@@ -150,6 +152,7 @@ func startReadingChannel(outputItems <-chan *tapApi.OutputChannelItem, extension
 		connection.SendText(string(data))
 
 		servicemap.GetInstance().NewTCPEntry(mizuEntry.Source, mizuEntry.Destination, &item.Protocol)
+		elastic.GetInstance().PushEntry(mizuEntry)
 	}
 }
 

agent/pkg/elastic/esClient.go

@@ -0,0 +1,120 @@
+package elastic
+
+import (
+	"bytes"
+	"crypto/tls"
+	"encoding/json"
+	"github.com/elastic/go-elasticsearch/v7"
+	"github.com/up9inc/mizu/shared"
+	"github.com/up9inc/mizu/shared/logger"
+	"github.com/up9inc/mizu/tap/api"
+	"net/http"
+	"sync"
+	"time"
+)
+
+type client struct {
+	es            *elasticsearch.Client
+	index         string
+	insertedCount int
+}
+
+var instance *client
+var once sync.Once
+
+func GetInstance() *client {
+	once.Do(func() {
+		instance = newClient()
+	})
+	return instance
+}
+
+func (client *client) Configure(config shared.ElasticConfig) {
+	if config.Url == "" || config.User == "" || config.Password == "" {
+		logger.Log.Infof("No elastic configuration was supplied, elastic exporter disabled")
+		return
+	}
+	transport := http.DefaultTransport
+	tlsClientConfig := &tls.Config{InsecureSkipVerify: true}
+	transport.(*http.Transport).TLSClientConfig = tlsClientConfig
+	cfg := elasticsearch.Config{
+		Addresses: []string{config.Url},
+		Username:  config.User,
+		Password:  config.Password,
+		Transport: transport,
+	}
+
+	es, err := elasticsearch.NewClient(cfg)
+	if err != nil {
+		logger.Log.Fatalf("Failed to initialize elastic client %v", err)
+	}
+
+	// Have the client instance return a response
+	res, err := es.Info()
+	if err != nil {
+		logger.Log.Fatalf("Elastic client.Info() ERROR: %v", err)
+	} else {
+		client.es = es
+		client.index = "mizu_traffic_http_" + time.Now().Format("2006_01_02_15_04")
+		client.insertedCount = 0
+		logger.Log.Infof("Elastic client configured, index: %s, cluster info: %v", client.index, res)
+	}
+	defer res.Body.Close()
+}
+
+func newClient() *client {
+	return &client{
+		es:    nil,
+		index: "",
+	}
+}
+
+type httpEntry struct {
+	Source      *api.TCP               `json:"src"`
+	Destination *api.TCP               `json:"dst"`
+	Outgoing    bool                   `json:"outgoing"`
+	CreatedAt   time.Time              `json:"createdAt"`
+	Request     map[string]interface{} `json:"request"`
+	Response    map[string]interface{} `json:"response"`
+	Summary     string                 `json:"summary"`
+	Method      string                 `json:"method"`
+	Status      int                    `json:"status"`
+	ElapsedTime int64                  `json:"elapsedTime"`
+	Path        string                 `json:"path"`
+}
+
+func (client *client) PushEntry(entry *api.Entry) {
+	if client.es == nil {
+		return
+	}
+
+	if entry.Protocol.Name != "http" {
+		return
+	}
+
+	entryToPush := httpEntry{
+		Source:      entry.Source,
+		Destination: entry.Destination,
+		Outgoing:    entry.Outgoing,
+		CreatedAt:   entry.StartTime,
+		Request:     entry.Request,
+		Response:    entry.Response,
+		Summary:     entry.Summary,
+		Method:      entry.Method,
+		Status:      entry.Status,
+		ElapsedTime: entry.ElapsedTime,
+		Path:        entry.Path,
+	}
+
+	entryJson, err := json.Marshal(entryToPush)
+	if err != nil {
+		logger.Log.Errorf("json.Marshal ERROR: %v", err)
+		return
+	}
+	var buffer bytes.Buffer
+	buffer.WriteString(string(entryJson))
+	res, _ := client.es.Index(client.index, &buffer)
+	if res.StatusCode == 201 {
+		client.insertedCount += 1
+	}
+}