Apache: enable maintenance mode across all virtual hosts
I have a server running Apache with several VirtualHosts e.g. domain1.example1.com domain2.example1.com etc. All these webapps are related. When the app is updated; I want to enable maintenance mode in apache for all VirtualHosts at the same time, redirecting to a centralized maintenance page. Right now I have in one of my Virtual Host configurations:
<VirtualHost *>
ServerAdmin [email protected]
DocumentRoot /var/www/website
ServerName website.com
ServerAlias www.website.com
RewriteEngine On
RewriteCond %{DOCUMENT_ROOT}/maintenance.html -f
RewriteCond %{REQUEST_FILENAME} !/maintenance.html
RewriteRule ^.*$ /maintenance.html [L]
</VirtualHost>
Ideally I want to enable the mode by renaming one file somewhere on the server e.g.
mv /app/system/maintenance.disabled /app/system/maintenance.html
Is something like this possible or can it only be configured for each VirtualHost seperately?
Answer
Create a file called maintenance.conf with the following in it:
RewriteEngine On
RewriteCond %{DOCUMENT_ROOT}/maintenance.html -f
RewriteCond %{REQUEST_FILENAME} !/maintenance.html
RewriteRule ^.*$ /maintenance.html [L]
Then setup your vhosts like:
<VirtualHost *>
ServerAdmin [email protected]
DocumentRoot /var/www/website
ServerName website.com
ServerAlias www.website.com
Include conf/maintenance.conf
</VirtualHost>
Then when you want to enable maintenance mode, just uncomment those lines in maintenance.conf and restart apache.
Alternatively you could make maintenace.conf.disabled and maintenace.conf.enabled. Then create a symbolic link for maintenance.conf to point to the enabled or disabled version of the file and bounce apache.
You could even wrap doing that in a script. One called enabled-maintence-mode.sh and disable-maintenance-mode.sh that would remove and create the symbolic links respectively and restart apache.