What are some alternatives?
When comparing eZ Server Monitor and Ravello, you can also consider the following products
PhpSysInfo - phpSysInfo is a customizable PHP script that displays information about your systems.
Puppet - Get started with Puppet Enterprise, or upgrade or expand.
netdata - Real-time performance monitoring, done right
Terraform - Tool for building, changing, and versioning infrastructure safely and efficiently.
Zabbix - Track, record, alert and visualize performance and availability of IT resources
Rancher - Open Source Platform for Running a Private Container Service