server {
listen   80;
server_name www.test.com;
root  /var/www/test;
index index.html index.htm;
location / {
}
# 定义错误页面码，如果出现相应的错误页面码，转发到那里。
error_page 404 403 500 502 503 504 /404.html;
# 承接上面的location。
location = /404.html {
# 放错误页面的目录路径。
root  /usr/share/nginx/html;
}
}

upstream www {
server 192.168.1.201:7777 weight=20 max_fails=2 fail_timeout=30s;
ip_hash;
}
server {
listen    80;
server_name www.test.com;
root  /var/www/test;
index index.html index.htm;
location / {
if ($request_uri ~* ‘^/$') {
rewrite .*  http://www.test.com/index.html redirect;
}
# 关键参数：这个变量开启后，我们才能自定义错误页面，当后端返回404，nginx拦截错误定义错误页面
proxy_intercept_errors on;
proxy_pass   http://www;
proxy_set_header HOST  $host;
proxy_set_header X-Real-IP   $remote_addr;
proxy_set_header X-Forwarded-FOR $proxy_add_x_forwarded_for;
}
error_page  404 /404.html;
location = /404.html {
root  /usr/share/nginx/html;
}
}

error_page  404 /404.html;
location = /404.html {
root  /usr/share/nginx/html;
}

error_page 404 /404.html;
error_page 404 = http://www.test.com/error.html;