Integrating Nagios checks with Logstash provides a centralized monitoring solution that complements the distributed monitoring capabilities of Beats. Users can utilize the logstash-input-nagioscheck plugin to parse the output of Nagios checks and push performance data metrics into the Logstash pipeline. This integration facilitates the storage and analysis of custom polling data, potentially allowing indefinite retention with Elasticsearch's Rollup feature and enabling trend forecasting with machine learning. The process involves installing the necessary plugins, setting up Elasticsearch and Kibana, and configuring specific checks for data ingestion. Despite being community-maintained, the integration offers a flexible and simple interface for users to write or download Nagios checks, making it accessible even for those with minimal scripting skills.