Load balancing - nginx configures backup server, error page does not take effect

Question

1. When configuring the nginx backup server, when the other two servers are unavailable, jump to the customized page. But it did not take effect after the actual configuration; please check what is wrong with my configuration

IP of the host where nginx is installed: 192.168.109.210
IP of the other two hosts where apache is installed: 192.168.109.208 and 192.168.109.209

2.Code segment

http{

upstream mysvr {

server 192.168.109.208  weight=1 max_fails=2 fail_timeout=2;
server 192.168.109.209  weight=1 max_fails=2 fail_timeout=2;
server 127.0.0.1:80  backup;
}

server {

    listen       80;
    server_name  localhost;

    #设置错误页面
    root /data/www/errorpage;
    index index.html;
    
    location / {
                #设置反向代理
                #proxy_pass  http://192.168.109.208;
                proxy_pass http://mysvr;
                proxy_set_header X-Real-IP $remote_addr;
    }
    
    

}
}

3. Configured error page index.html
[root@yunwei109-210 errorpage]# more index.html
<h1>Sorry, I reported an error! (O_O)</h1>
[root@yunwei109-210 errorpage]# pwd
/data/www/errorpage

4. Error message (after stopping the other 2 servers)

Current error page

Correct error page
Sorry, I reported an error!

Answer 1

Add in http segment:

proxy_next_upstream  http_404 http_502 error;

For details, please visit:
http://nginx.org/en/docs/http...
http://nginx.org/en/docs/http...