I was wondering what others are doing to monitor their server infrastructure for small(er) scale projects. I am currently looking for something that basically does the following for me:
On 3 VPS, monitor CPU usage, disk space usage and network traffic and send me alerts if any of these values reach a defined threshold or have very unusual spikes.
All of the solutions I could find out there - both hosted as well as self-hosted - seem overly complex for my needs and required a lot of configuration wrangling and come with a lot of bells and whistles I do not need. I’ve got pretty decent metrics on application performance already, so this would really be about monitoring infrastructure to raise an alarm before systems go into an unhealthy state and brings down the services.