摘要：
代理_忙_缓冲区_大小128k；位置/｛proxy_passhttp:proxy_redirectoff；proxy_send_timeout300；proxy_set_headerHost$host；proxy_set-headerX-Real-IP$remote_addr；
nginx+tomcat
后端为tomcat，nginx代理报504超时错误。
问题处理：
1、修改/etc/nginx/nginx.conf，添加如下信息：
http {
include /etc/nginx/mime.types;
default_type application/octet-stream;
log_format main '$remote_addr - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent" "$http_x_forwarded_for"';
access_log /var/log/nginx/access.log main;
sendfile on;
#tcp_nopush on;
keepalive_timeout 65;
#gzip on;
include /etc/nginx/conf.d/*.conf;
#用于tomcat反向代理,解决nginx 504错误
proxy_connect_timeout 300; #单位秒
proxy_send_timeout 300; #单位秒
proxy_read_timeout 300; #单位秒
proxy_buffer_size 16k;
proxy_buffers 4 64k;
proxy_busy_buffers_size 128k;
proxy_temp_file_write_size 128k;
# ps:以timeout结尾配置项时间要配置大点
}2、修改server{}，添加如下信息：
location / {
proxy_pass http://182.61.131.62:33060/;
proxy_redirect off;
proxy_send_timeout 300;
proxy_read_timeout 300;
proxy_connect_timeout 300;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}