今天有同事找我，说图片上传之后，不知道去哪里了。分析了一下问题，找到原因之后做了处理，这里简要记录一下。
问题原因：
1.首先后台log并无错误信息；
2.捡查了一下浏览器，发现network中有报错，413 Request Entity Too Large，但前台未报错。
解决办法：
1.备份Nginx配置文件；（个人习惯，免得修改之后，如果需要还原，忘记原来的配置）
2.查看当前Nginx配置文件：
[root@VM_0_16_centos nginx]# cat nginx.conf | grep client_max_body_size
client_max_body_size 10m;
client_max_body_size 10m;
client_max_body_size 10m;
client_max_body_size 10m;
client_max_body_size 10m;
client_max_body_size 10m;
client_max_body_size 10m;
client_max_body_size 10m;
结果发现涉及到很多项目，继续查询
cat /etc/nginx/nginx.conf | grep -C 10 client_max_body_size
得到结果如下：
[root@VM_0_16_centos nginx]# cat /etc/nginx/nginx.conf | grep -C 10 client_max_body_size # Load configuration files for the default server block. #include /etc/nginx/default.d/*.conf; location ^~ /b1/ { proxy_pass http://b1_server/; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_set_header Connection close; proxy_connect_timeout 5000ms; # client_max_body_size 10m; access_log /logs/nginx/access_api_b1.log main; error_log /logs/nginx/error_api_b1.log info; } location ^~ /bn/ { proxy_pass http://bn_server/; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_set_header Connection close; proxy_connect_timeout 5000ms; # client_max_body_size 10m; access_log /logs/nginx/access_api_bn.log main; error_log /logs/nginx/error_api_bn.log info; } # 由于boss程序中web路径已经带/boss前缀,所以proxy_pass不能带/后缀,后续再调整,切记切记！ location ^~ /boss/ { proxy_pass http://boss_server; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_set_header Connection close; proxy_connect_timeout 5000ms; # client_max_body_size 10m; access_log /logs/nginx/access_api_boss.log main; error_log /logs/nginx/error_api_boss.log info; } location ^~ /detector/ { proxy_pass http://detector_server/; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_set_header Connection close; proxy_connect_timeout 5000ms; client_max_body_size 10m; access_log /logs/nginx/access_api_detector.log main; error_log /logs/nginx/error_api_detector.log info; } location ^~ /sales/ { proxy_pass http://sales_server/; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_set_header Connection close; proxy_connect_timeout 5000ms; # client_max_body_size 10m; access_log /logs/nginx/access_api_sales.log main; error_log /logs/nginx/error_api_sales.log info; } location ^~ /qn/prv/ { proxy_pass http://private.haochuang.cn/; } location ^~ /qn/pub/ { -- error_log /logs/nginx/error_admin_boss.log info; } location ^~ /boss/ { proxy_pass http://boss_server; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_set_header Connection close; proxy_connect_timeout 5000ms; # client_max_body_size 10m; access_log /logs/nginx/access_api_boss.log main; error_log /logs/nginx/error_api_boss.log info; } location ^~ /stats/ { proxy_pass http://stats_server; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_set_header Connection close; proxy_connect_timeout 5000ms; client_max_body_size 10m; access_log /logs/nginx/access_api_stats.log main; error_log /logs/nginx/error_api_stats.log info; } location ^~ /qn/prv/ { proxy_pass http://private.haochuang.cn/;
}
3.修改配置文件：
location / {
root html;
index index.html index.htm;
client_max_body_size 1000m;
}
修改client_max_body_size 配置：
server { listen 80; server_name chat.erp.360buy.com; #access_log /export/servers/nginx/logs/chat.erp.360buy.com; location / { proxy_pass http://tomcat; client_max_body_size 10m; #表示最大上传10M，需要多大设置多大。 } }
3.重新加载配置文件，并重新加载nginx：
[root@VM_0_16_centos nginx]# /usr/sbin/nginx -c /etc/nginx/nginx.conf
nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:443 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:443 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:443 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:443 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:443 failed (98: Address already in use)
nginx: [emerg] still could not bind()
[root@VM_0_16_centos nginx]# /usr/sbin/nginx -s reload
4.如果还未生效，重启nginx：
[root@VM_0_16_centos nginx]# /usr/sbin/nginx -s reload
[root@VM_0_16_centos nginx]# service nginx restart
Redirecting to /bin/systemctl restart nginx.service
5.再次验证结果，结果可见，最终问题已解决。
/usr/local/nginx/sbin/nginx -t
2.重新加载nginx,nginx相关参数
[root@VM_0_16_centos nginx]# which nginx
/usr/sbin/nginx
[root@VM_0_16_centos nginx]# /usr/sbin/nginx -h
nginx version: nginx/1.12.2
Usage: nginx [-?hvVtTq] [-s signal] [-c filename] [-p prefix] [-g directives]
Options:
-?,-h : this help
-v : show version and exit
-V : show version and configure options then exit
-t : test configuration and exit
-T : test configuration, dump it and exit
-q : suppress non-error messages during configuration testing
-s signal : send signal to a master process: stop, quit, reopen, reload
-p prefix : set prefix path (default: /usr/share/nginx/)
-c filename : set configuration file (default: /etc/nginx/nginx.conf)
-g directives : set global directives out of configuration file
...