nginx 显示 502 504 究竟如何系统的排查错误?? - V2EX
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spikeLIN
V2EX    Linux

nginx 显示 502 504 究竟如何系统的排查错误??

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  •   spikeLIN Aug 2, 2016 3164 views
    This topic created in 3593 days ago, the information mentioned may be changed or developed.

    个人现在只会无脑看 log,然后重启碰运气.....
    谷歌上搜出来都是关于 php-cgi 的,有没有抛开语言的一个比较清晰的思路来找问题??
    望各位前辈不吝赐教.

    5 replies    2016-08-06 21:33:01 +08:00
    fcicq
        1
    fcicq  
       Aug 2, 2016
    Brendan Gregg 的 USE 方法论.
    spikeLIN
        2
    spikeLIN  
    OP
       Aug 2, 2016
    @fcicq 我去看看
    xmgit
        3
    xmgit  
       Aug 2, 2016
    意思就是叫你去 Nginx 的 upstream 去找原因
    至于怎么找原因,难道还能不看 log?
    skylancer
        4
    skylancer  
       Aug 3, 2016
    502 504 直接去看 PHP-FPM/Spawn-fcgi 这个没的说
    bianjp
        5
    bianjp  
    PRO
       Aug 6, 2016
    首先看 nginx 的 error log (默认为 /var/log/nginx/error.log ),通常会有些线索。
    然后看应用服务器( PHP-FPM 、 Ruby 的 Unicorn, Puma 等)的日志。
    最后看应用的的日志。一般靠框架记录日志,自己写的代码很少写日志。
    经验多了之后可以调整下顺序。
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