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Tracing

Enable tracing middleware

Install#

go get github.com/rookie-ninja/rk-boot/v2
go get github.com/rookie-ninja/rk-mux

Options#

options description type default
mux.middleware.trace.enabled Enable tracing middleware boolean false
mux.middleware.trace.ignore Ignore by path []string []
mux.middleware.trace.exporter.file.enabled Enable file exporter boolean false
mux.middleware.trace.exporter.file.outputPath Path of file exporter string stdout
mux.middleware.trace.exporter.jaeger.agent.enabled Enable jaeger agent exporter boolean false
mux.middleware.trace.exporter.jaeger.agent.host Hostname of jaeger agent string localhost
mux.middleware.trace.exporter.jaeger.agent.port Port of jaeger agent int 6831
mux.middleware.trace.exporter.jaeger.collector.enabled Enable jaeger collector boolean false
mux.middleware.trace.exporter.jaeger.collector.endpoint Hostname of jaeger collector string http://localhost:16368/api/trace
mux.middleware.trace.exporter.jaeger.collector.username Username of jaeger collector string ""
mux.middleware.trace.exporter.jaeger.collector.password Password of jaeger collector string ""

Quick start#

1.Create boot.yaml#

---
mux:
  - name: greeter
    port: 8080
    enabled: true
    middleware:
      trace:
        enabled: true
        exporter:
          file:
            enabled: true
            outputPath: "stdout"
#        ignore: [""]
#          jaeger:
#            agent:
#              enabled: false
#              host: ""
#              port: 0
#            collector:
#              enabled: true
#              endpoint: ""
#              username: ""
#              password: ""

2.Create main.go#

// Copyright (c) 2021 rookie-ninja
//
// Use of this source code is governed by an Apache-style
// license that can be found in the LICENSE file.
package main

import (
  "context"
  _ "embed"
  "fmt"
  "github.com/rookie-ninja/rk-boot/v2"
  "github.com/rookie-ninja/rk-mux/boot"
  "github.com/rookie-ninja/rk-mux/middleware"
  "net/http"
)

// @title RK Swagger for Mux
// @version 1.0
// @description This is a greeter service with rk-boot.
func main() {
  // Create a new boot instance.
  boot := rkboot.NewBoot()

  // Get MuxEntry
  muxEntry := rkmux.GetMuxEntry("greeter")
  // Use *mux.Router adding handler.
  muxEntry.Router.NewRoute().Path("/v1/greeter").HandlerFunc(Greeter)

  // Bootstrap
  boot.Bootstrap(context.TODO())

  boot.WaitForShutdownSig(context.TODO())
}

// Greeter handler
// @Summary Greeter service
// @Id 1
// @version 1.0
// @produce application/json
// @Param name query string true "Input name"
// @Success 200 {object} GreeterResponse
// @Router /v1/greeter [get]
func Greeter(writer http.ResponseWriter, req *http.Request) {
  rkmuxmid.WriteJson(writer, http.StatusOK, &GreeterResponse{
    Message: fmt.Sprintf("Hello %s!", req.URL.Query().Get("name")),
  })
}

type GreeterResponse struct {
  Message string
}

3.Validate#

Send request

$ curl -X GET "localhost:8080/v1/greeter?name=rk-dev"
{"Message":"Hello rk-dev!"}

{
  "Name": "/v1/greeter",
  "SpanContext": {
    "TraceID": "507aaae07729a9f7cae7ec25ee7f0ede",
    "SpanID": "ea556bd79f2f2732",
    "TraceFlags": "01",
    "TraceState": "",
    "Remote": false
  },
  "Parent": {
    "TraceID": "00000000000000000000000000000000",
    "SpanID": "0000000000000000",
    "TraceFlags": "00",
    "TraceState": "",
    "Remote": true
  },
  "SpanKind": 2,
  "StartTime": "2022-04-15T23:28:34.054496+08:00",
  "EndTime": "2022-04-15T23:28:34.054594239+08:00",
  "Attributes": [
    ...
    {
      "Key": "http.status_code",
      "Value": {
        "Type": "INT64",
        "Value": 200
      }
    }
  ],
  ...
  "Resource": [
    {
      "Key": "service.entryName",
      "Value": {
        "Type": "STRING",
        "Value": "greeter"
      }
    },
    {
      "Key": "service.entryType",
      "Value": {
        "Type": "STRING",
        "Value": "MuxEntry"
      }
    },
  ],
  "InstrumentationLibrary": {
    "Name": "greeter",
    "Version": "semver:1.4.0",
    "SchemaURL": ""
  }
}

Cheers#

4.Export to file#

There will be delays in seconds

---
mux:
  - name: greeter
    port: 8080
    enabled: true
    middleware:
      trace:
        enabled: true
        exporter:
          file:
            enabled: true
            outputPath: "logs/tracing.log"

Cheers#

5.Export to jaeger#

Start jaeger-all-in-one locally 

$ docker run -d --name jaeger \
    -e COLLECTOR_ZIPKIN_HOST_PORT=:9411 \
    -p 5775:5775/udp \
    -p 6831:6831/udp \
    -p 6832:6832/udp \
    -p 5778:5778 \
    -p 16686:16686 \
    -p 14268:14268 \
    -p 14250:14250 \
    -p 9411:9411 \
    jaegertracing/all-in-one:1.23


---
mux:
  - name: greeter
    port: 8080
    enabled: true
    middleware:
      trace:
        enabled: true
        exporter:
          jaeger:
            agent:
              enabled: true
#              host: ""                                        # Optional, default: localhost
#              port: 0                                         # Optional, default: 6831
#            collector:
#              enabled: true                                   # Optional, default: false
#              endpoint: ""                                    # Optional, default: http://localhost:14268/api/traces
#              username: ""                                    # Optional, default: ""
#              password: ""                                    # Optional, default: ""

Jaeger:

http://localhost:16686/

jaeger

Cheers#