Nginx网站服务器在生产环境中运行的时候需要进行实时监控。实际上，诸如Nagios, Zabbix, Munin 的网络监控软件是支持 Nginx 监控的。
如果你不需要以上软件提供的综合性报告或者长期数据统计功能，只是需要一种快速简便的办法去监控 Nginx 服务器的请求的话，我建议你采用一个叫 ngxtop 的命令行工具。
你马上就会发现 ngxtop 从界面和名称都借鉴了著名的top命令。ngxtop 是通过分析 Nginx 或者其他的日志文件，使用类似 top 命令的界面实时展示出来的。你可以说你知道的其他高端监控工具，但是在简洁这方面 ngxtop 无疑是最好的。简单就意味着不可替代。
本指南中，我将介绍如何使用 ngxtop 实时监控 Nginx 网站服务器。tail -f log思想
Linux 上安装 ngxtop
首先在 Linux 系统中安装依赖库pip（LCTT译注：ngxtop是用python编写的）。
然后使用如下命令安装 ngxtop。
| 1 | $ sudo pip install ngxtop |
安装过程中可能要安装下面的
安装setuptools
wget https://pypi.python.org/packages/2.7/s/setuptools/setuptools-0.6c11-py2.7.egg –no-check-certificate
chmod +x setuptools-0.6c11-py2.7.egg
sh setuptools-0.6c11-py2.7.egg
安装pip
https://pypi.python.org/packages/source/p/pip/pip-1.5.4.tar.gz#md5=834b2904f92d46aaa333267fb1c922bb
tar xzvf pip-1.5.4.tar.gz
cd pip-1.5.4
python setup.py install
安装ngxtop
/usr/local/bin/pip install ngxtop
直接通过ngxtop源码安装
wget https://github.com/lebinh/ngxtop/archive/1c200d51fbae7824a30159714669146d6b214210.zip
unzip ngxtop-1c200d51fbae7824a30159714669146d6b214210.zip
cd ngxtop-1c200d51fbae7824a30159714669146d6b214210
python setup.py install
如果提示没有pyparsing的话，下载安装即可
wget https://pypi.python.org/packages/source/p/pyparsing/pyparsing-2.0.1.zip
unzip pyparsing-2.0.1.zip
cd pyparsing-2.0.1
python setup.py instal
mac下安装
1：sudo easy_install pip
Searching for pip Reading http://pypi.python.org/simple/pip/ Best match: pip 1.5.6 Downloading https://pypi.python.org/packages/source/p/pip/pip-1.5.6.tar.gz#md5=01026f87978932060cc86c1dc527903e Processing pip-1.5.6.tar.gz Running pip-1.5.6/setup.py -q bdist_egg –dist-dir /tmp/easy_install-b_qfo0/pip-1.5.6/egg-dist-tmp-e4s5RT warning: no files found matching ‘pip/cacert.pem’ warning: no files found matching ‘.html’ under directory ‘docs’ warning: no previously-included files matching ‘.rst’ found under directory ‘docs/_build’ no previously-included directories found matching ‘docs/_build/_sources’ Adding pip 1.5.6 to easy-install.pth file Installing pip script to /usr/local/bin Installing pip2.7 script to /usr/local/bin Installing pip2 script to /usr/local/bin
Installed /Library/Python/2.7/site-packages/pip-1.5.6-py2.7.egg Processing dependencies for pip Finished processing dependencies for pip
2：sudo easy_install ngxtop
Searching for ngxtop Reading http://pypi.python.org/simple/ngxtop/ Best match: ngxtop 0.0.2 Downloading https://pypi.python.org/packages/source/n/ngxtop/ngxtop-0.0.2.tar.gz#md5=9758ff9c8163024a5a9b30df9fb6eedc Processing ngxtop-0.0.2.tar.gz Running ngxtop-0.0.2/setup.py -q bdist_egg –dist-dir /tmp/easy_install-PM9GWD/ngxtop-0.0.2/egg-dist-tmp-b4YKqT zip_safe flag not set; analyzing archive contents… Adding ngxtop 0.0.2 to easy-install.pth file Installing ngxtop script to /usr/local/bin
Installed /Library/Python/2.7/site-packages/ngxtop-0.0.2-py2.7.egg Processing dependencies for ngxtop Searching for pyparsing Reading http://pypi.python.org/simple/pyparsing/ Reading http://pyparsing.sourceforge.net/ Reading http://pyparsing.wikispaces.com/ Reading http://sourceforge.net/project/showfiles.php?group_id=97203 Reading http://sourceforge.net/projects/pyparsing Best match: pyparsing 2.0.2 Downloading https://pypi.python.org/packages/source/p/pyparsing/pyparsing-2.0.2.zip#md5=e0e49d73cfb9e79954b4a1c553dfae44 Processing pyparsing-2.0.2.zip Running pyparsing-2.0.2/setup.py -q bdist_egg –dist-dir /tmp/easy_install-0zIQL_/pyparsing-2.0.2/egg-dist-tmp-OBF_vN zip_safe flag not set; analyzing archive contents… pyparsing: module MAY be using inspect.stack Adding pyparsing 2.0.2 to easy-install.pth file
Installed /Library/Python/2.7/site-packages/pyparsing-2.0.2-py2.7.egg Searching for tabulate Reading http://pypi.python.org/simple/tabulate/ Best match: tabulate 0.7.2 Downloading https://pypi.python.org/packages/source/t/tabulate/tabulate-0.7.2.tar.gz#md5=77223d7dc7a650fae3c847e227b02558 Processing tabulate-0.7.2.tar.gz Running tabulate-0.7.2/setup.py -q bdist_egg –dist-dir /tmp/easy_install-vXwPBG/tabulate-0.7.2/egg-dist-tmp-Tycglg zip_safe flag not set; analyzing archive contents… Adding tabulate 0.7.2 to easy-install.pth file
Installed /Library/Python/2.7/site-packages/tabulate-0.7.2-py2.7.egg Searching for docopt Reading http://pypi.python.org/simple/docopt/ Best match: docopt 0.6.2 Downloading https://pypi.python.org/packages/source/d/docopt/docopt-0.6.2.tar.gz#md5=4bc74561b37fad5d3e7d037f82a4c3b1 Processing docopt-0.6.2.tar.gz Running docopt-0.6.2/setup.py -q bdist_egg –dist-dir /tmp/easy_install-CBRTn7/docopt-0.6.2/egg-dist-tmp-Wrl_Jo zip_safe flag not set; analyzing archive contents… Adding docopt 0.6.2 to easy-install.pth file
Installed /Library/Python/2.7/site-packages/docopt-0.6.2-py2.7.egg Finished processing dependencies for ngxtop
ngxtop 使用
基本使用方法如下：
基本使用方法如下：
ngxtop [options]
ngxtop [options] (print|top|avg|sum) <var>
ngxtop info
这里是一些通用选项。
- -l : 指定日志文件的完整路径 (Nginx 或 Apache2)
- -f : 日志格式
- –no-follow: 处理当前已经写入的日志文件，而不是实时处理新添加到日志文件的日志
- -t : 更新频率
- -n : 显示行号
- -o : 排序规则(默认是访问计数)
- -a …, –a …: 添加表达式(一般是聚合表达式如： sum, avg, min, max 等)到输出中。
- -v: 输出详细信息
- -i : 只处理符合规则的记录
以下是一些内置变量，他们的含义不言自明。
bodybytessend http_referer httpuseragent remote_addr remote_user request status time_local 使用 ngxtop 监控 Nginx
ngxtop 默认会从其配置文件 (/etc/nginx/nginx.conf) 中查找 Nginx 日志的地址。所以，监控 Nginx ，运行以下命令即可：
$ ngxtop
这将会列出10个 Nginx 服务，按请求数量排序。
显示前20个最频繁的请求：
$ ngxtop -n 20 hhhh
获取Nginx基本信息：
$ ngxtop info gggg
你可以自定义显示的变量，简单列出需要显示的变量。使用 “print” 命令显示自定义请求。
$ ngxtop print request http_user_agent remote_addr 0000
显示请求最多的客户端IP地址
$ ngxtop top remote_addr tttt
显示状态码是404的请求
$ ngxtop -i ‘status == 404’ print request status dddd
除了Nginx，ngtop 还可以处理其他的日志文件，比如 Apache 的访问文件。使用以下命令监控 Apache 服务器:
| $ tail -f /var/log/apache2/access.log | ngxtop -f common |
via: http://xmodulo.com/2014/06/monitor-nginx-web-server-command-line-real-time.html
