Take you ten days to easily handle Go micro service series (nine, link tracking)

The preface

We will show you a detailed example of a Go-Zero microservice in a series of ten articles. The table of contents is as follows:

1. Environment set up
2. Service split
3. Customer service
4. Product/service
5. Order service
6. Payment service
7. Auth authentication for RPC service
8. Service monitoring
9. Link Tracing (this article)
10. Distributed transaction

I hope this series will take you to use the Docker environment on the machine and use go-Zero to quickly develop a mall system, so that you can quickly get started with micro services.

Full example code: github.com/nivin-studi…

First, let’s look at the overall service breakdown diagram:

9.1 Jaegerintroduce

Jaeger is a distributed tracking system developed and open source by Uber. Compatible with OpenTracing API, Jaeger is suitable for the following scenarios:

• Distributed trace information delivery
• Distributed transaction monitoring
• Problem analysis
• Service dependency analysis
• Performance optimization

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

• client: Is responsible for timing, sampling at each call point on the whole link, and willtracingData is sent locallyagent.
• agent: Responsible for collectionclientFrom thetracingData, and tothriftProtocol forward tocollector.
• collector: Responsible for collecting allagentreportedtracingData, unified storage.

9.2 go-zerouseJaegerLink to track

The Go-Zero framework has already enabled link tracing (see: Go-zero link tracing), and integrated support for Jaeger and Zipkin link tracing reporting tools. With simple configuration, we can visually view the complete call chain of a request, as well as the call situation and performance of each link.

9.2.1 adduser apiserviceTelemetryconfiguration

$ vim mall/service/user/api/etc/user.yaml
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Name: User
Host: 0.0. 0. 0
Port: 8000

.

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

$ vim mall/service/user/rpc/etc/user.yaml
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Name: user.rpc
ListenOn: 0.0. 0. 0: 9000

.

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

$ vim mall/service/product/api/etc/product.yaml
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Name: Product
Host: 0.0. 0. 0
Port: 8001

.

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

$ vim mall/service/product/rpc/etc/product.yaml
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Name: product.rpc
ListenOn: 0.0. 0. 0: 9001

.

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

9.2.5 addorder apiserviceTelemetryconfiguration

$ vim mall/service/order/api/etc/order.yaml
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Name: Order
Host: 0.0. 0. 0
Port: 8002

.

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

9.2.6 addorder rpcserviceTelemetryconfiguration

$ vim mall/service/order/rpc/etc/order.yaml
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Name: order.rpc
ListenOn: 0.0. 0. 0: 9002

.

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

9.2.7 addpay apiserviceTelemetryconfiguration

$ vim mall/service/pay/api/etc/pay.yaml
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Name: Pay
Host: 0.0. 0. 0
Port: 8003

.

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

9.2.8 addpay rpcserviceTelemetryconfiguration

$ vim mall/service/pay/rpc/etc/pay.yaml
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Name: pay.rpc
ListenOn: 0.0. 0. 0: 9003

.

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

Note: The modification takes effect only after the service is restarted.

9.3 the use ofJaeger UISee the link

• access/api/user/userinfo API interface

• inChapter 1 Environment ConstructionWe integrateJaegerServe, and forJaeger UIThe port number16686Made the host port5000“, so enter it in your browserhttp://127.0.0.1:5000/accessJaeger UIInterface. chooseSearchThe menu,ServiceSelect a value from the drop-down list boxuser.apiAnd then clickFind TracesButton to query to the one you just visited/api/user/userinfoLink tracing data of the interface.

• Click in, and you can see this/api/user/userinfoLink timing diagram of the interface, as well as service dependencies, and time consumption.

• Different data presentation styles can be selected from the drop-down menu in the upper right corner.

• Link tracing renderings of other interfaces

The project address

Github.com/zeromicro/g…

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Wechat communication group

Pay attention to the public account of “micro-service Practice” and click on the exchange group to obtain the QR code of the community group.