Apache virtualhost for Icinga2

icinga_apache_vhost.conf

<VirtualHost *:80>
    ServerName yourdomain.com
    DocumentRoot /usr/share/icingaweb2/public
    RedirectMatch permanent "^/$"   "http://yourdomain.com/icingaweb2/"

    Alias /icingaweb2 "/usr/share/icingaweb2/public"

    <Directory "/usr/share/icingaweb2/public">
        Options SymLinksIfOwnerMatch
        AllowOverride None

        <IfModule mod_authz_core.c>
            # Apache 2.4
            <RequireAll>
                Require all granted
            </RequireAll>
        </IfModule>

        <IfModule !mod_authz_core.c>
            # Apache 2.2
            Order allow,deny
            Allow from all
        </IfModule>

        SetEnv ICINGAWEB_CONFIGDIR "/etc/icingaweb2"

        EnableSendfile Off

        <IfModule mod_rewrite.c>
            RewriteEngine on
            RewriteBase /icingaweb2/
            RewriteCond %{REQUEST_FILENAME} -s [OR]
            RewriteCond %{REQUEST_FILENAME} -l [OR]
            RewriteCond %{REQUEST_FILENAME} -d
            RewriteRule ^.*$ - [NC,L]
            RewriteRule ^.*$ index.php [NC,L]
        </IfModule>

        <IfModule !mod_rewrite.c>
            DirectoryIndex error_norewrite.html
            ErrorDocument 404 /error_norewrite.html
        </IfModule>
    </Directory>
</VirtualHost>

Full article: https://www.notesoncloudcomputing.com/posts/2020-01-05-apache-virtualhost-icinga2/