【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
******** ** ** * * ** ** ** ** ** ** ** ** ******** **** **** **** **** ****** **** *** **************************************************************************** ******* **** *** **** **** ** ** ***** ** ***** ** ** ** ** ** ** ** ** * *** ** **** ** ** ** ***** **** ** ** *** ****** ** ** ** ** ** ** ** :: 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); }
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