解决nginx报错：502 Bad Gateway以及504 Gateway Time-out问题

wordprss安装插件或者上传大文件时，总是时不时出现这个问题。

错误——502 Bad Gateway 502 Bad Gateway nginx

安装失败： 502 Bad Gateway 502 Bad Gateway nginx <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page -->

如图所示

解决方法：

参考（看了很多解决问题的文章，这篇分析的够透彻）

http://www.360doc.com/content/16/0105/17/12146850_525690022.shtml

vi /www/server/php/74/etc/php-fpm.conf

修改前文件配置

[global]
pid = /www/server/php/74/var/run/php-fpm.pid
error_log = /www/server/php/74/var/log/php-fpm.log
log_level = notice
[www]
listen = /tmp/php-cgi-74.sock
listen.backlog = 8192
listen.allowed_clients = 127.0.0.1
listen.owner = www
listen.group = www
listen.mode = 0666
user = www
group = www
pm = dynamic
pm.status_path = /phpfpm_74_status
pm.max_children = 150
pm.start_servers = 10
pm.min_spare_servers = 10
pm.max_spare_servers = 30
request_terminate_timeout = 100
request_slowlog_timeout = 30
slowlog = var/log/slow.log

修改request_terminate_timeout = 600

重启php

再安装插件，感觉没那么快出错，怀疑是安装插件时间段内网络不好，毕竟是在插件在国外。

然而这次出现的是504错误。

错误——504 Gateway Time-out 504 Gateway Time-out nginx

安装失败： 504 Gateway Time-out 504 Gateway Time-out nginx <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page -->

修改配置文件nginx.conf

修改前配置

fastcgi_connect_timeout 300;
fastcgi_send_timeout 300;
fastcgi_read_timeout 300;
fastcgi_buffer_size 64k;
fastcgi_buffers 4 64k;
fastcgi_busy_buffers_size 128k;
fastcgi_temp_file_write_size 256k;

调大这两个参数，修改后为：

fastcgi_buffer_size 128k;
fastcgi_buffers 8 128k;

重启nginx

完美解决！