Nagios Set of Plugins to monitor your Ethereum Node Health. If already have a Nagios deployment for monitoring your servers, adding these plugins will allow you to get an alert when something is going bad.
Read my blog at http://inside-out.xyz/ You will find there the proper guide. http://inside-out.xyz/technology/configure-nagios-to-monitor-your-ethereum-node.html has a quick guide.
There is always the option of commercial support :)