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main.go
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main.go
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package main
import (
"context"
"fmt"
"github.com/jaegertracing/jaeger/model"
"github.com/jaegertracing/jaeger/proto-gen/api_v2"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials/insecure"
tele "gopkg.in/telebot.v3"
"io"
"log"
"os"
"strconv"
"strings"
"time"
)
func main() {
checkInterval := time.Duration(getRequiredIntegerEnvironmentVariable("CHECK_INTERVAL_MINUTES")) * time.Minute
maximumAge := time.Duration(getRequiredIntegerEnvironmentVariable("MAXIMUM_AGE_HOURS")) * time.Hour
jaegerAddr := getRequiredEnvironmentVariable("JAEGER_ADDR")
serviceName := getRequiredEnvironmentVariable("JAEGER_SERVICE_NAME")
recipientChatId := tele.ChatID(getRequiredIntegerEnvironmentVariable("TELEGRAM_RECIPIENT_USER_ID"))
botToken := getRequiredEnvironmentVariable("TELEGRAM_BOT_TOKEN")
bot, err := tele.NewBot(tele.Settings{Token: botToken})
if err != nil {
log.Fatal(err)
}
lastStartTime := time.Now().Add(-maximumAge)
for {
nextStartTime := time.Now()
errors, err := getErrorMessages(err, jaegerAddr, lastStartTime, serviceName)
if err != nil {
log.Println(err)
} else {
if len(errors) > 0 {
err := sendErrorMessages(errors, bot, recipientChatId)
if err != nil {
log.Println(err)
}
}
lastStartTime = nextStartTime
}
if lastStartTime.Before(time.Now().Add(-maximumAge)) {
lastStartTime = time.Now().Add(-maximumAge)
}
time.Sleep(checkInterval)
}
}
func getRequiredEnvironmentVariable(key string) string {
value, exists := os.LookupEnv(key)
if !exists {
log.Fatalf("Required environment variable %s not set", key)
}
return value
}
func getRequiredIntegerEnvironmentVariable(key string) int64 {
value := getRequiredEnvironmentVariable(key)
intValue, err := strconv.ParseInt(value, 10, 64)
if err != nil {
log.Fatalf("Required environment variable %s not set", key)
}
return intValue
}
func sendErrorMessages(errorMessages []string, bot *tele.Bot, recipient tele.ChatID) error {
_, err := bot.Send(recipient, fmt.Sprintf("Found %d errors", len(errorMessages)))
if err != nil {
return err
}
for _, errorMessage := range errorMessages {
fmt.Println(errorMessage)
fmt.Println()
if len(errorMessage) > 4000 {
errorMessage = errorMessage[:4000]
}
_, err := bot.Send(recipient, errorMessage)
if err != nil {
return err
}
}
return nil
}
func getErrorMessages(err error, serverAddr string, startTime time.Time, serviceName string) ([]string, error) {
conn, err := grpc.Dial(serverAddr, grpc.WithTransportCredentials(insecure.NewCredentials()))
if err != nil {
return nil, err
}
defer func(conn *grpc.ClientConn) {
err := conn.Close()
if err != nil {
log.Println(err)
}
}(conn)
client := api_v2.NewQueryServiceClient(conn)
result, err := client.FindTraces(
context.Background(),
&api_v2.FindTracesRequest{
Query: &api_v2.TraceQueryParameters{
ServiceName: serviceName,
Tags: map[string]string{"error": "true"},
StartTimeMin: startTime,
},
},
)
if err != nil {
return nil, err
}
var errors []string
for {
res, err := result.Recv()
if err == io.EOF {
break
}
if err != nil {
return errors, err
}
for _, span := range res.GetSpans() {
for _, spanLog := range span.GetLogs() {
isError := false
for _, field := range spanLog.GetFields() {
if field.GetKey() == "level" && strings.ToLower(field.GetVStr()) == "error" {
isError = true
break
}
field.GetVStr()
}
if isError {
errors = append(errors, createErrorMessage(span, spanLog))
}
}
}
}
return errors, nil
}
func createErrorMessage(span model.Span, log model.Log) string {
operation := span.GetOperationName()
namespace := ""
traceId := span.TraceID.String()
event := ""
target := ""
message := ""
timestamp := log.GetTimestamp().Format(time.DateTime)
for _, tag := range span.GetTags() {
if tag.GetKey() == "code.namespace" {
namespace = tag.GetVStr()
}
}
for _, log := range log.GetFields() {
if log.GetKey() == "event" {
event = log.GetVStr()
}
if log.GetKey() == "target" {
target = log.GetVStr()
}
if log.GetKey() == "exception.message" {
message = log.GetVStr()
}
}
return fmt.Sprintf("Error occured at %s UTC!\n\nParent: %s (%s)\nTrace: %s\n\nTarget: %s\n\n%s\n%s", timestamp, operation, namespace, traceId, target, event, message)
}