I am looking for a software product I can host myself that is either free or very reasonably priced, to help detect server problems before they cause serious issues, and to alert both me and the end user. The user should be able to log in and see their servers in a read-only manner, and I should be able to configure servers, users and alerts.
The system should play nice with CentOS and cPanel, and should be very easy to install on the agent servers. It should be bug-free and resource-efficient.
To those who have used Observium, does it tick all of these boxes, and do you think it would be suitable? The alternative I'm considering is to write my own, similar to NodeQuery.