Haproxy
HAProxy is a free, very fast and reliable solution offering high availability, load balancing, and proxying for TCP and HTTP-based applications. It is particularly suited for web sites crawling under very high loads while needing persistence or Layer7 processing. Supporting tens of thousands of connections is clearly realistic ...
Monitoring services using Mon
mon is a general-purpose scheduler and alert management tool used for monitoring service availability and
triggering alerts upon failure detection.
Mon uses some Linux command and services such as ping command to check host connectivity and mail servers for sending mail, so you must install postfix ...
Monit is a utility for managing and monitoring processes, files, directories and devices on a Unix system. Monit conducts automatic maintenance and repair and can execute meaningful causal actions in error situations. E.g. monit can start a process if it does not run, restart a process if it does not respond and stop a process if it ...