Page under maintenance in NGINX

Question

Sometimes I need to stop my website to put it under maintenance and I use the following NGINX configuration:

server {
        server_name     mypage.com;
        listen          443 ssl http2;
        listen          [::]:443 ssl http2;

        root            /var/www/mypage.com/public_html/;
        index           maintenance.html;
}

The question is, if I access my website as follows: https://mypage.com everything works correctly and the maintenance.html page that I want is displayed.

The problem is when someone accesses a page within my site that is NOT the main one (for example, https://mypage.com/contact), which causes a page not found error.

What I want to achieve is that, in maintenance mode, any visitor of my web, accessing any subpage of it, arrives to the maintenance.html page.

Thanks!

Answer 1

location / {
    try_files maintenance.html
}

Adding this in inside the server block should do it, it will always match this location unless a more precise one is declared.

Answer 2

Trying and trying it over and over again... I've found the solution:

server {
        server_name     mypage.com;
        listen          443 ssl http2;
        listen          [::]:443 ssl http2;

        root            /var/www/mypage.com/public_html/;
        index           maintenance.html;

        location / {
                try_files $uri $uri/ /maintenance.html
        }
}