php zipkin客户端和阿里云链路追踪的使用

选用阿里云的链路追踪优势在于不用自己搭建和维护这套系统，且支持jaeger、zipkin、skywalking客户端。jaeger和zipkin目前都需要在业务中嵌入代码，skywalking无代码侵入。目前php版本的skywalking客户端不支持authentication。本着先有后优的原则，先用zipkin作为客户端。

//Trace.class.php
public static function getTracing($endpointName, $ipv4)
 {
        //$endpointName可以设置为一个应用的名字
        $endpoint = \Zipkin\Endpoint::create($endpointName, $ipv4, null, 2555);
        //阿里云中的接入点
        $url = Config::TRACE_URL;

        //修改endpoint_url,否则默认为http://localhost:9411/api/v2/spans
        $options = ["endpoint_url"=>$url,"timeout"=>1];
        $reporter = new \Zipkin\Reporters\Http(\Zipkin\Reporters\Http\CurlFactory::create(), $options);
        $sampler = \Zipkin\Samplers\BinarySampler::createAsAlwaysSample();
        $tracing = \Zipkin\TracingBuilder::create()
            ->havingLocalEndpoint($endpoint)
            ->havingSampler($sampler)
            ->havingReporter($reporter)
            ->build();
        return $tracing;
    }
   
//服务端调用：
public function startServerTrace($serviceName, $functionName)
{
        $localIp = Common::getLocalIp();
        $tracing = self::getTracing($serviceName, $localIp);
        $headers = Common::getHeaders();
        $extractor = $tracing->getPropagation()->getExtractor(new \Zipkin\Propagation\Map());
        $extractedContext = $extractor($headers);
        $this->tracer = $tracing->getTracer();
        $this->span = $this->tracer->nextSpan($extractedContext);
        $this->span->start();
        $this->span->setName("Server:" . $functionName);
        $this->span->setKind(\Zipkin\Kind\SERVER);
        return [$this->tracer, $this->span];
}
public function stopServerTrace()
{
        $this->span->finish();
        $this->tracer->flush();
}

//客户端加入链路追踪
public function getUser()
{
        $localIp = Common::getLocalIp();
        $tracing = Trace::getTracing("codebase", $localIp);
        $tracer = $tracing->getTracer();
        $span = $tracer->newTrace();
        $span->start();
        //可以设置成调用的函数名
        $span->setName("someMethod");
        $span->setKind(\Zipkin\Kind\CLIENT);
        $span->tag(\Zipkin\Tags\HTTP_PATH, $url);
        $span->tag(\Zipkin\Tags\HTTP_STATUS_CODE, $httpCode);
       
        // 加入rpc请求头中
        $tmpHeaders = [];
        $injector = $tracing->getPropagation()->getInjector(new \Zipkin\Propagation\Map());
        $injector($span->getContext(), $tmpHeaders);
        $header = $tmpHeaders;
        foreach ($tmpHeaders as $key => $value) {
                $headers[] = $key . ":" . $value;
        }
        //$client = new \Yar_Client($url);
        //...

       $span->finish();
       $tracer->flush();
}

服务端获取客户端header

public function someMethod($params){
        $trace = new Trace();
        $trace->startServerTrace("sign", __FUNCTION__);
        //加入链路中
        //...
        $trace->stopServerTrace();
}

阿里云应用列表：

1564405353221.jpg

某个应用接口列表：

WX20190729-211109@2x.png

参考：
https://help.aliyun.com/document_detail/96187.html
https://github.com/openzipkin/zipkin-php