Hi,

1. Each Odoo instance must listen on a different port. Locate the configuration files for each Odoo instance (typically located at /etc/odoo/odoo.conf or /etc/odoo.conf) and set the xmlrpc_port option to unique ports for each instance.

[options]

; Set the port for Odoo version 1

xmlrpc_port = 8069

; Set the port for Odoo version 2

xmlrpc_port = 8070

2. The example of nginx configuration is:

server {

    listen 443 ssl;

    server_name custom-domain.com;

    ssl_certificate /path/to/fullchain.pem;

    ssl_certificate_key /path/to/privkey.pem;

    location /odoo1 {

        proxy_pass http://127.0.0.1:8069;

        proxy_redirect off;

        proxy_set_header Host $host;

        proxy_set_header X-Real-IP $remote_addr;

        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

        proxy_set_header X-Forwarded-Proto $scheme;

    }

    location /odoo2 {

        proxy_pass http://127.0.0.1:8070;

        proxy_redirect off;

        proxy_set_header Host $host;

        proxy_set_header X-Real-IP $remote_addr;

        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

        proxy_set_header X-Forwarded-Proto $scheme;

    }

}

You can refer the following log for more details:

https://www.cybrosys.com/blog/how-to-setup-two-versions-of-odoo-in-the-same-server-with-one-domain-and-ssl

Hope it helps

How about your second instance odoo2? Is this working with the config?