Monitor kubernetes services / resources using icinga2 (including autodiscovery support) - gyselroth/kube-icinga
Monitoring plugin to check Kubernetes container environments in Rancher 2.x
bpmon - Montior Business Processes composed of Icinga2 Service Checks
Searchlight by AppsCode is a Kubernetes operator for Icinga. If you are running production workloads in Kubernetes, you probably want to be alerted when things go wrong. Icinga periodically runs various checks on a Kubernetes cluster and sends notifications if detects an issue. It also nicely supplements whitebox monitoring tools like, Prometheus with blackbox monitoring can catch problems that are otherwise invisible, and also serves as a fallback in case internal systems completely fail. Searchlight is a TPR controller for Kubernetes built around Icinga to address these issues.
cucumber-nagios lets you describe how a system should work in natural language, and outputs whether it does in the Nagios plugin format
dashing-icinga2 - Dashing using the Icinga 2 API (v2.4+)
icingaweb2-module-director - Manage Icinga 2 configuration