Dynamic location-based mass hosting approach with maintenance mode

multi-app.conf

<VirtualHost *:80>

    # Define a conventional location for where are apps are deployed
    # Locations such as "/apps/foo" and "/apps/bar" will match result
    # in "foo" and "bar", respectively, being the application "names".
    WSGIScriptAliasMatch ^/apps/([^/]+) /usr/local/srv/apps/$1-env/$1/src/conf/wsgi/app.py

    # This example derived from deployed multiple Django applications, thus
    # the static and media directories are mapped here.
    AliasMatch ^/apps/([^/]+)/static/(.*) /usr/local/srv/apps/$1-env/$1/src/_static/$2
    AliasMatch ^/apps/([^/]+)/media/(.*) /usr/local/srv/apps/$1-env/$1/src/media/$2

    # A trivial "maintenance mode" solution is to keep a directory around
    # of static files for displaying a page while in maintenance mode.
    AliasMatch ^/apps/([^/]+)/maintenance/(.*) /usr/local/srv/apps/$1-env/$1/maintenance/$2

    RewriteEngine On

    # This first set of conditions test whether a "MAINTENANCE_MODE" file
    # exists in the project root (same where the maintenance directory
    # lives) and redirects to the static maintenance location.
    RewriteCond %{REQUEST_URI} ^/apps/([^/]+)/(.*)
    RewriteCond %2 !^maintenance
    RewriteCond /usr/local/srv/apps/%1-env/%1/MAINTENANCE_MODE -f
    RewriteRule ^.*$ /apps/%1/maintenance/ [R,L]

    # This set of conditions test whether a "MAINTENANCE_MODE" file
    # does _not_ exist in the project root and redirects to the root
    # location of the app.
    RewriteCond %{REQUEST_URI} ^/apps/([^/]+)/maintenance/.*
    RewriteCond /usr/local/srv/apps/%1-env/%1/MAINTENANCE_MODE !-f
    RewriteRule ^.*$ /apps/%1/ [R,L]

</VirtualHost>

single-app.conf

<VirtualHost *:80>

    WSGIScriptAlias / /usr/local/srv/apps/app-env/app/src/conf/wsgi/app.py

    Alias /static /usr/local/srv/apps/app-env/app/src/_static
    Alias /media /usr/local/srv/apps/app-env/app/src/media
    Alias /maintenance /usr/local/srv/apps/app-env/app/maintenance

    RewriteEngine On
    RewriteCond %{REQUEST_URI} !^/maintenance/.*
    RewriteCond /usr/local/srv/apps/app-env/app/MAINTENANCE_MODE -f
    RewriteRule ^ /maintenance/ [R,L]

    RewriteCond %{REQUEST_URI} ^/maintenance/.*
    RewriteCond /usr/local/srv/apps/app-env/app/MAINTENANCE_MODE !-f
    RewriteRule ^ / [R,L]

</VirtualHost>