使用golang http.PostForm进行分布式跟踪 [英] Distributed tracing with golang http.PostForm

问题描述

在我的项目中，我尝试使用opentracing实施分布式跟踪.

我的微服务具有以下结构.

-- API-Gateway
       |_ User-Service
       |_ Notification 

在我的API网关中，我启动并在API网关中，我使用到函数来开始跟踪，代码取自

我使用http.PostForm()从validateemail()调用我的用户服务.

_, err := http.PostForm("http://user:7071/checkemail", url.Values{"uuid": {uuid}, "email": {email}})

此处uuid用于单独的任务，而不用于跟踪. 我无法使用PostForm()将此Span发布到下一个服务.

如何克服这个问题?

解决方案

我认为不能通过PostForm完成.您可能需要使用http.NewRequest创建POST请求，使用Inject标头中的跨度，并使用Client.Do发送请求.

In my project, I try to implement distributed tracing using opentracing.

My microservice has following structure.

-- API-Gateway
       |_ User-Service
       |_ Notification 

In my API-gateway, I start and in API gateway, I use a to a function to start tracing, code is taken from Setting up your tracer

in main():

gatewayTracer := &apiTracer{tracer: startTracing("API Gateway")}

http.HandleFunc("/getemail", gatewayTracer.validatemail)

func (apitracer apiTracer) validatemail(res http.ResponseWriter, req *http.Request) {

    validateEmailSpan := apitracer.tracer.StartSpan("Validate Email")
}

I call to my User-service from validateemail() using http.PostForm().

_, err := http.PostForm("http://user:7071/checkemail", url.Values{"uuid": {uuid}, "email": {email}})

Here uuid is for separate task, not for tracing. I can not post this Span to the next service using PostForm().

How to overcome this issue?

解决方案

I don't think it can be done from PostForm. You would need to use http.NewRequest to create the POST request, Inject the span in headers and use Client.Do to send the request.

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