Venood Katuwa

Sensu-Stack

Sensu is a monitoring tool written in Ruby that uses RabbitMQ as a message broker and Redis for storing data. It is well-suited for monitoring cloud environments. Sensu connects the output from "check" scripts with "handler" scripts to create a robust monitoring and alert system. Check scripts can run on many nodes, and report on whether a certain condition is met, such as that Apache is running. Handler scripts can take an action like sending an alert email. Both the "check" scripts and the "handler" scripts run on the Sensu master server, which is responsible for orchestrating check executions among Sensu client servers and processing check results. If a check triggers an event, it is passed to the handler, which will take a specified action. An example of this is a check that monitors the status of an Apache web server. The check will be run on the Sensu clients. If the check reports a server as down, the Sensu server will pass the event to the handler, which can trigger an action like sending an email or collecting downtime metrics.