【PHP】关于系统性能追踪工具molten

一、简介

关于molten的介绍网上有很多,是一个全链路追踪的工具,Molten可以看做是phptrace的的升级版(流行的php问题定位工具譬如phptrace,xhprof,这些工具可以自行Google,看看如何使用)

Molten能干啥

molten追踪php核心调用库运行时信息并且按照zipkin/optracing格式输出信息。
可以追踪`curl,pdo,mysqli,redis,mongodb,memcached` 这么多的运行信息。

你可以直接看到你耗时比较久的接口的运行信息,调用信息,一眼就能看到哪个地方慢

二、安装

zipkin 开源分布式系统调用跟踪工具(java写的工具),所以系统需要安装Java或者docker
molten为php作对应的数据收集

1、安装Java

最简单的方式rpm 安装,我这里可以直接安装

yum -y install java

查看Java安装情况

[root@localhost~]# java -version
openjdk version "1.8.0_212"
OpenJDK Runtime Environment (build 1.8.0_212-b04)
OpenJDK 64-Bit Server VM (build 25.212-b04, mixed mode)

2、安装依赖 

yum -y install libevent-devel

3、安装molten

cd /usr/local/src
git clone https://github.com/chuan-yun/Molten.git

cd Molten
phpize
./configure --enable-zipkin-header=yes
make && make install

4、配置molte.ini

[molten]
extension="molten.so"
molten.enable="1"
molten.service_name="local"
molten.tracing_cli=1
molten.open_report=1
molten.sampling_type=2
molten.sampling_rate=1
molten.notify_uri="http://127.0.0.1:9411/zipkin/"
molten.sink_http_uri="http://127.0.0.1:9411/api/v1/spans"
molten.sink_type=4
molten.sink_log_path="/tmp/logs/"

5、下载并启动zipkin

curl -sSL https://zipkin.apache.org/quickstart.sh | bash -s

java -jar zipkin.jar --logging.level.zipkin=DEBUG 2>&1 >/dev/null &

启动界面

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:: Powered by Spring Boot ::         (v2.1.5.RELEASE)

2019-05-21 22:26:30.113  INFO 19403 --- [           main] z.s.ZipkinServer                         : Starting ZipkinServer v2.14.0 on iZwz9ccq9xttkykppxhkwtZ with PID 19403
2019-05-21 22:26:30.123 DEBUG 19403 --- [           main] z.s.ZipkinServer                         : Running with Spring Boot v2.1.5.RELEASE, Spring v5.1.7.RELEASE
2019-05-21 22:26:30.123  INFO 19403 --- [           main] z.s.ZipkinServer                         : The following profiles are active: shared
2019-05-21 22:26:34.586  INFO 19403 --- [           main] c.l.a.c.Flags                            : com.linecorp.armeria.verboseExceptions: false (default)
2019-05-21 22:26:34.587  INFO 19403 --- [           main] c.l.a.c.Flags                            : com.linecorp.armeria.verboseSocketExceptions: false (default)
2019-05-21 22:26:34.587  INFO 19403 --- [           main] c.l.a.c.Flags                            : com.linecorp.armeria.verboseResponses: false (default)
2019-05-21 22:26:34.667  INFO 19403 --- [           main] c.l.a.c.Flags                            : com.linecorp.armeria.useEpoll: true (default)
2019-05-21 22:26:34.927  INFO 19403 --- [           main] c.l.a.c.Flags                            : com.linecorp.armeria.useOpenSsl: true (default)
2019-05-21 22:26:34.930  INFO 19403 --- [           main] c.l.a.c.Flags                            : com.linecorp.armeria.maxNumConnections: 2147483647 (default)
2019-05-21 22:26:34.930  INFO 19403 --- [           main] c.l.a.c.Flags                            : com.linecorp.armeria.numCommonWorkers: 2 (default)
2019-05-21 22:26:34.931  INFO 19403 --- [           main] c.l.a.c.Flags                            : com.linecorp.armeria.numCommonBlockingTaskThreads: 200 (default)
2019-05-21 22:26:34.941  INFO 19403 --- [           main] c.l.a.c.Flags                            : com.linecorp.armeria.defaultMaxRequestLength: 10485760 (default)
2019-05-21 22:26:34.942  INFO 19403 --- [           main] c.l.a.c.Flags                            : com.linecorp.armeria.defaultMaxResponseLength: 10485760 (default)
2019-05-21 22:26:34.942  INFO 19403 --- [           main] c.l.a.c.Flags                            : com.linecorp.armeria.defaultRequestTimeoutMillis: 10000 (default)
2019-05-21 22:26:34.942  INFO 19403 --- [           main] c.l.a.c.Flags                            : com.linecorp.armeria.defaultResponseTimeoutMillis: 15000 (default)
2019-05-21 22:26:34.943  INFO 19403 --- [           main] c.l.a.c.Flags                            : com.linecorp.armeria.defaultConnectTimeoutMillis: 3200 (default)
2019-05-21 22:26:34.943  INFO 19403 --- [           main] c.l.a.c.Flags                            : com.linecorp.armeria.defaultWriteTimeoutMillis: 1000 (default)
2019-05-21 22:26:34.947  INFO 19403 --- [           main] c.l.a.c.Flags                            : com.linecorp.armeria.defaultServerIdleTimeoutMillis: 15000 (default)
2019-05-21 22:26:34.948  INFO 19403 --- [           main] c.l.a.c.Flags                            : com.linecorp.armeria.defaultClientIdleTimeoutMillis: 10000 (default)
2019-05-21 22:26:34.948  INFO 19403 --- [           main] c.l.a.c.Flags                            : com.linecorp.armeria.defaultHttp2InitialConnectionWindowSize: 1048576 (default)
2019-05-21 22:26:34.949  INFO 19403 --- [           main] c.l.a.c.Flags                            : com.linecorp.armeria.defaultHttp2InitialStreamWindowSize: 1048576 (default)
2019-05-21 22:26:34.951  INFO 19403 --- [           main] c.l.a.c.Flags                            : com.linecorp.armeria.defaultHttp2MaxFrameSize: 16384 (default)
2019-05-21 22:26:34.952  INFO 19403 --- [           main] c.l.a.c.Flags                            : com.linecorp.armeria.defaultHttp2MaxStreamsPerConnection: 2147483647 (default)
2019-05-21 22:26:34.952  INFO 19403 --- [           main] c.l.a.c.Flags                            : com.linecorp.armeria.defaultHttp2MaxHeaderListSize: 8192 (default)
2019-05-21 22:26:34.956  INFO 19403 --- [           main] c.l.a.c.Flags                            : com.linecorp.armeria.defaultHttp1MaxInitialLineLength: 4096 (default)
2019-05-21 22:26:34.957  INFO 19403 --- [           main] c.l.a.c.Flags                            : com.linecorp.armeria.defaultHttp1MaxHeaderSize: 8192 (default)
2019-05-21 22:26:34.957  INFO 19403 --- [           main] c.l.a.c.Flags                            : com.linecorp.armeria.defaultHttp1MaxChunkSize: 8192 (default)
2019-05-21 22:26:34.957  INFO 19403 --- [           main] c.l.a.c.Flags                            : com.linecorp.armeria.defaultUseHttp2Preface: true (default)
2019-05-21 22:26:34.957  INFO 19403 --- [           main] c.l.a.c.Flags                            : com.linecorp.armeria.defaultUseHttp1Pipelining: false (default)
2019-05-21 22:26:34.958  INFO 19403 --- [           main] c.l.a.c.Flags                            : com.linecorp.armeria.defaultBackoffSpec: exponential=200:10000,jitter=0.2 (default)
2019-05-21 22:26:34.958  INFO 19403 --- [           main] c.l.a.c.Flags                            : com.linecorp.armeria.defaultMaxTotalAttempts: 10 (default)
2019-05-21 22:26:34.965  INFO 19403 --- [           main] c.l.a.c.Flags                            : com.linecorp.armeria.routeCache: maximumSize=4096 (default)
2019-05-21 22:26:34.966  INFO 19403 --- [           main] c.l.a.c.Flags                            : com.linecorp.armeria.compositeServiceCache: maximumSize=256 (default)
2019-05-21 22:26:34.966  INFO 19403 --- [           main] c.l.a.c.Flags                            : com.linecorp.armeria.parsedPathCache: maximumSize=4096 (default)
2019-05-21 22:26:34.966  INFO 19403 --- [           main] c.l.a.c.Flags                            : com.linecorp.armeria.headerValueCache: maximumSize=4096 (default)
2019-05-21 22:26:34.967  INFO 19403 --- [           main] c.l.a.c.Flags                            : com.linecorp.armeria.cachedHeaders: :authority,:scheme,:method,accept-encoding,content-type (default)
2019-05-21 22:26:34.974  INFO 19403 --- [           main] c.l.a.c.Flags                            : com.linecorp.armeria.annotatedServiceExceptionVerbosity: unhandled (default)
2019-05-21 22:26:34.979  INFO 19403 --- [           main] c.l.a.c.Flags                            : Using /dev/epoll
2019-05-21 22:26:34.979  INFO 19403 --- [           main] c.l.a.c.Flags                            : Using OpenSSL: BoringSSL, 0x1010007f
2019-05-21 22:26:35.504  INFO 19403 --- [           main] c.l.a.s.d.DocStringExtractor             : Using com.linecorp.armeria.thrift.jsonDir: META-INF/armeria/thrift
2019-05-21 22:26:35.538  INFO 19403 --- [           main] c.l.a.c.u.SystemInfo                     : Hostname: izwz9ccq9xttkykppxhkwtz (from /proc/sys/kernel/hostname)
2019-05-21 22:26:36.036  INFO 19403 --- [oss-http-*:9411] c.l.a.s.Server                           : Serving HTTP at /0.0.0.0:9411 - http://127.0.0.1:9411/
2019-05-21 22:26:36.037  INFO 19403 --- [           main] c.l.a.s.ArmeriaAutoConfiguration         : Armeria server started at ports: {/0.0.0.0:9411=ServerPort(/0.0.0.0:9411, [http])}
2019-05-21 22:26:36.139  INFO 19403 --- [           main] c.d.d.core                               : DataStax Java driver 3.7.1 for Apache Cassandra
2019-05-21 22:26:36.166  INFO 19403 --- [           main] c.d.d.c.GuavaCompatibility               : Detected Guava >= 19 in the classpath, using modern compatibility layer
2019-05-21 22:26:37.149  INFO 19403 --- [           main] c.d.d.c.ClockFactory                     : Using native clock to generate timestamps.
2019-05-21 22:26:37.577  INFO 19403 --- [           main] z.s.ZipkinServer                         : Started ZipkinServer in 9.103 seconds (JVM running for 11.001)

6、分析数据

可以打开 http://127.0.0.1:9411/zipkin/  进行数据分析了

 

 

 

三、功能

现在Molten提供curl、pdo、mysqli、redis、mongodb、memcached等组件的拦截,这些信息拦截都是应用透明,开箱即用,输出zipkin格式非常方便。

查看molten是否正常启动了,可以访问:http://your.domain/molten/status:

输出内容格式让人感到疑惑,其实这个是prometheus监控exporter输出格式,输出这种格式方便和prometheus集成。

 

还可以通过POST http://your.domain/molten/status修改探针采样的方式,内容如下:

{"enable":1,"samplingType":2,"samplingRate":20,"samplingRequest":100}

其中samplingType是采样类型:1是根据采样率采样,2是根据每分钟的请求数。

samplingRate是采样率,即多少个请求采样一个,samplingRequest是每分钟的前多少个请求被采样。采样是降低性能损耗的有效方式,通过还能够根据系统的承载量动态的调整。

还可通过molten.sink_type设置数据输出方式, 1是输出到文件中, 2输出到标准输出,4 通过http发送。

 

Molten在phptrace数据分析的基础上进行大量的开发, 本身性能在开启采样率的情况下影响较小。

应用影响如下:

四、增加trace方法

分析源码文件 molten_intercept.c可以看到在 `mo_intercept_ctor` 方法中,通过在 MINIT 阶段注入相关的方法实现了对调用的监控。

其中 PDO

PDOStatement@execute
PDO@exec
PDO@query
PDO@commit
PDO@prepare

其中 mysqli

mysqli_connect mysqli@__construct
mysqli_real_connect mysqli@real_connect
mysqli_query mysqli@query
mysqli_prepare mysqli@prepare
mysqli_stmt_prepare mysqli_stmt@prepare
mysqli_stmt_execute mysqli_stmt@execute
mysqli@commit

其中 curl 

curl_setopt
curl_exec
curl_setopt_array
curl_reset

可以看到 molten 对 PHP 常用的远程调用服务方法都做了监控,但还不够全面,更新也不够及时,如果我们想对其他方法监控(比如 rpc、predis、kafka 等)可以做一些改造。

参考其他的方法追加代码

/* predis */
{
    ADD_INTERCEPTOR_TAG(pit, Predis\\Client);
    INIT_INTERCEPTOR_ELE(Predis\\Client@__construct, &default_capture, &default_predis_record);
    INIT_INTERCEPTOR_ELE(Predis\\Client@__call, &default_capture, &default_predis_record);
}

针对 predis 编写predis_request_record方法

/* {{{ predis default method record */
static void default_predis_record(mo_interceptor_t *pit, mo_frame_t *frame)
{
    zval *span = build_com_record(pit, frame, 0);

    merge_span_extra(span, frame);

    pit->psb->span_add_ba_ex(span,  "componet", "Predis\\Client", frame->exit_time, pit->pct, BA_NORMAL);

    pit->psb->span_add_ba_ex(span,  "db.type", "redis", frame->exit_time, pit->pct, BA_NORMAL);

    /* check exception */
    SET_DEFAULT_EXCEPTION(frame, pit);

    /* add span */
    mo_chain_add_span(pit->pct->pcl, span);
}

  

posted @ 2019-05-21 22:35  踏雪无痕SS  阅读(1110)  评论(0编辑  收藏