[ignore]How to use nginx load balance jitis meet servers

I have to jitsi installed.
meet1.domain.com and meet2.domain.com
they now have their own Nginx.

I have set up another Nginx ( meetha.domain.com)
the nginx site config is :

upstream meet_servers{
server meet1.domain.com:443 ;
server meet2.domain.com:443 ;
}

server {
listen 443;
ssl on;
server_name meetha.domain.com
ssl *****

location / {
    ssi on;
}

location /meet {
    proxy_pass      https://meet_servers;
    proxy_set_header X-Forwarded-For $remote_addr;
    proxy_set_header Host $http_host;
}

}

but the redirect do not work.
when I enter
https://atlas.pangu.com/meet/
it can show the web page
but when create a meeting. the http-bind return fail:

the header:

Request URL: https://meet1.domain.com/http-bind?room=a
Referrer Policy: no-referrer-when-downgrade
Provisional headers are shown
Access-Control-Request-Headers: content-type
Access-Control-Request-Method: POST
Origin: https://meetha.domain.com
Referer: https://meetha.domain.com/meet/a
Sec-Fetch-Mode: no-cors
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.132 Safari/537.36
room: a

the response is empty

anyone has a sample nginx config file ?