最近为了分析公司的一个 nginx + lua 的应用性能,正好需要用到春神的那套 nginx-lua 的分析脚本,,因此就立马去搭建下
环境:
依赖项:
systemtap-2.6 依赖于 elfutils
注:CentOS 5.8 上面安装 systemtap-2.6 的时候,elfutils 的版本不能太高,不然会报错,安装 systemtap-2.6 失败,目前使用的版本是 elfutils-0.149
该文的前提是你已经编译安装好了支持 lua 的 nginx 版本,以及你已经安装好了 systemstap 所需的你对应操作系统的 kernel-debug-debuginfo 和 kernel-debuginfo-common,这个版本必须和你的系统的内核版本一模一样,一个字符不一样都不行,查看版本的方法是:
[apps@TEST-APP-011 ~]$ uname -r2.6.18-308.el5
所以我对应的版本是:
kernel-debug-debuginfo-2.6.18-308.el5.x86_64.rpmkernel-debuginfo-common-2.6.18-308.el5.x86_64.rpm
具体的安装步骤可以参考官方文档。
下载安装所需的软件下载 systemtap-2.6cd /tmp/ && wget https://sourceware.org/systemtap/ftp/releases/systemtap-2.6.tar.gz –no-check-certificate下载 elfutils-0.149cd /tmp && wget https://Fedorahosted.org/releases/e/l/elfutils/0.149/elfutils-0.149.tar.bz2 –no-check-certificate安装 systemtap-2.6
解压 elfutils-0.149
cd /tmp/ && tar -xvf elfutils-0.149.tar.bz2
解压 systemtap-2.6
cd /tmp && tar -zxvf systemtap-2.6.tar.gz
安装 systemtap-2.6
编译
cd /tmp/systemtap-2.6 && ./configure –prefix=/opt/stap –disable-docs –disable-publican –disable-refdocs CFLAGS=”-g -O2″ –with-elfutils=/tmp/elfutils-0.149
安装
make -j8 && make install
做软连接
sudo ln -snf /opt/stap/bin/stap /usr/bin/stap
验证命令
stap -VSystemtap translator/driver (version 2.6/0.149, non-git sources)Copyright (C) 2005-2014 Red Hat, Inc. and othersThis is free software; see the source for copying conditions.enabled features: LIBRPM LIBSQLITE3 NSS BOOST_SHARED_PTR TR1_UNORDERED_MAP NLS LIBXML2
注:有时候运行 stap -V 命令的时候会出错,错误如下:
stap: /usr/lib64/libelf.so.1: version `ELFUTILS_1.5′ not found (required by stap) stap: /usr/lib64/libdw.so.1: version `ELFUTILS_0.138′ not found (required by stap) stap: /usr/lib64/libdw.so.1: version `ELFUTILS_0.142′ not found (required by stap) stap: /usr/lib64/libdw.so.1: version `ELFUTILS_0.143′ not found (required by stap) stap: /usr/lib64/libdw.so.1: version `ELFUTILS_0.149′ not found (required by stap)
解决办法是,执行如下命令:
//查看 stap 的安装路径[apps@TEST-APP-011 ~]$ eu-readelf -d /usr/bin/stap|grep -E “RPATH|RUNPATH” RPATHLibrary rpath: [/opt/stap/lib/systemtap] RUNPATHLibrary runpath: [/opt/stap/lib/systemtap]// 加入环境变量export LD_LIBRARY_PATH=/opt/stap/lib/systemtap:$LD_LIBRARY_PATH使用春神的脚本
下载脚本:
git clone https://github.com/openresty/nginx-systemtap-toolkit.git
拿其中的一个脚本校验,结果如下:
sudo ./ngx-req-distr -c -m (/opt/nginx-lua/sbin/nginx)…worker reqs, 0 connsworker reqs, 0 connsworker reqs, 0 connsworker reqs, 0 connsworker reqs, 0 connsworker reqs, 0 connsworker reqs, 0 connsworker reqs, 0 connsworker reqs, 0 connsworker reqs, 0 connsworker reqs, 0 connsworker reqs, 15 connsworker reqs, 106 connsworker reqs, 0 connsworker reqs, 0 connsworker reqs,74 connsworker reqs, 0 connsworker reqs, 96 connsworker reqs, 213 connsworker reqs, 165 connsworker reqs, 14297 connsworker reqs, 247 connsworker reqs, 622 connsworker reqs, 249 connsworker reqs, 0 conns软件来源地址
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经受雨,面对另一个轮回。