当前位置：网站首页>Take you ten days to easily complete the go micro service series (IX. link tracking)

Take you ten days to easily complete the go micro service series (IX. link tracking)

2022-07-05 00:58:00 【Wan Junfeng, Kevin】

preface

We will show you one in detail through a series of articles go-zero Microservice example , The whole series is divided into ten articles , The directory structure is as follows ：

Environment building
Service split
Customer service
Product service
Order service
Payment services
RPC service Auth verification
Service monitoring
Link tracking （ this paper ）
Distributed transactions

I hope this series will take you to use it locally Docker Environmental utilization go-zero Quickly develop a mall system , Let you get started with micro services quickly .

Complete sample code ：https://github.com/nivin-studio/go-zero-mall

First , Let's take a look at the overall service split diagram ：

9.1 `Jaeger` Introduce

Jaeger yes Uber Develop and open source a distributed tracking system , compatible OpenTracing API, For the following scenarios ：

Distributed tracking information transfer
Distributed transaction monitoring
Problem analysis
Service dependency analysis
performance optimization

Jaeger The full link tracking function of is mainly completed by three roles :

client： Be responsible for the timing of each call point on the whole chain 、 sampling , And will tracing The data is sent locally agent.
agent： Responsible for collection client It's from tracing data , And thrift The agreement is forwarded to collector.
collector： Responsible for collecting all agent Reported tracing data , Unified storage .

9.2 `go-zero` Use `Jaeger` Link tracking

go-zero The framework has helped us realize link tracking （ See ：go-zero Link tracking ）, And the integration supports Jaeger, Zipkin These two link tracking and reporting tools , We just need a simple configuration , You can visually view the complete call chain of a request , And the call and performance of each link .

9.2.1 add to `user api` service `Telemetry` To configure

$ vim mall/service/user/api/etc/user.yaml

Name: User
Host: 0.0.0.0
Port: 8000

...

Telemetry:
  Name: user.api
  Endpoint: http://jaeger:14268/api/traces
  Sampler: 1.0
  Batcher: jaeger

9.2.2 add to `user rpc` service `Telemetry` To configure

$ vim mall/service/user/rpc/etc/user.yaml

Name: user.rpc
ListenOn: 0.0.0.0:9000

...

Telemetry:
  Name: user.rpc
  Endpoint: http://jaeger:14268/api/traces
  Sampler: 1.0
  Batcher: jaeger

9.2.3 add to `product api` service `Telemetry` To configure

$ vim mall/service/product/api/etc/product.yaml

Name: Product
Host: 0.0.0.0
Port: 8001

...

Telemetry:
  Name: product.api
  Endpoint: http://jaeger:14268/api/traces
  Sampler: 1.0
  Batcher: jaeger

9.2.4 add to `product rpc` service `Telemetry` To configure

$ vim mall/service/product/rpc/etc/product.yaml

Name: product.rpc
ListenOn: 0.0.0.0:9001

...

Telemetry:
  Name: product.rpc
  Endpoint: http://jaeger:14268/api/traces
  Sampler: 1.0
  Batcher: jaeger

9.2.5 add to `order api` service `Telemetry` To configure

$ vim mall/service/order/api/etc/order.yaml

Name: Order
Host: 0.0.0.0
Port: 8002

...

Telemetry:
  Name: order.api
  Endpoint: http://jaeger:14268/api/traces
  Sampler: 1.0
  Batcher: jaeger

9.2.6 add to `order rpc` service `Telemetry` To configure

$ vim mall/service/order/rpc/etc/order.yaml

Name: order.rpc
ListenOn: 0.0.0.0:9002

...

Telemetry:
  Name: order.rpc
  Endpoint: http://jaeger:14268/api/traces
  Sampler: 1.0
  Batcher: jaeger

9.2.7 add to `pay api` service `Telemetry` To configure

$ vim mall/service/pay/api/etc/pay.yaml

Name: Pay
Host: 0.0.0.0
Port: 8003

...

Telemetry:
  Name: pay.api
  Endpoint: http://jaeger:14268/api/traces
  Sampler: 1.0
  Batcher: jaeger

9.2.8 add to `pay rpc` service `Telemetry` To configure

$ vim mall/service/pay/rpc/etc/pay.yaml

Name: pay.rpc
ListenOn: 0.0.0.0:9003

...

Telemetry:
  Name: pay.rpc
  Endpoint: http://jaeger:14268/api/traces
  Sampler: 1.0
  Batcher: jaeger

Tips ： After configuration modification , You need to restart the service to take effect .

9.3 Use `Jaeger UI` View link

visit /api/user/userinfoapi Interface

stay Chapter one Environment building We integrated Jaeger service , And for it Jaeger UI Port number 16686 Made the host port 5000 The mapping relation of , So enter... In the browser http://127.0.0.1:5000/ visit Jaeger UI Interface . choice Search menu , stay Service Select from the drop-down box user.api, Finally, click Find Traces Button , You can query the just accessed /api/user/userinfo Link tracking data of the interface .