Icinga vs Prometheus Node Exporter

Icinga monitors infrastructure and applications, collecting and analyzing data to help teams identify and resolve errors. It covers servers, applications, and network devices across on-premises and cloud environments. Dashboards, filtered and grouped views, and notifications provide visibility, while troubleshooting entry points support root-cause investigation. Teams can extend monitoring with clustering, custom checks, plugins, configurable logic, and distributed environments. Listed integrations include Grafana, InfluxDB, Elastic, Graylog, Ansible, Puppet, Terraform, AWS, Azure, Jira, PagerDuty, and ServiceNow. The free edition supports API automation and Git-based workflows; the pricing FAQ describes a REST API for custom integrations. Icinga says node communication uses TLS/SSL and provides certificate tools. It can monitor certificates, alert as they approach expiry, and verify self-signed certificates using a custom trust store. The product is self-hosted and supports Linux and Windows; official packages cover several Linux distributions and Windows, with some requiring a paid subscription. The free, open source edition includes unlimited hosts and services. Paid support and subscriptions are also available, with support starting at $15,000 a year.

Prometheus Node Exporter exposes hardware and operating-system metrics from *NIX kernels for Prometheus. Written in Go, it uses pluggable collectors, with default coverage for CPU, disk I/O, filesystem, memory, and network metrics where the operating system supports them. Command-line flags enable or disable collectors, and some collectors accept include or exclude filters. The exporter listens on HTTP port 9100 by default. Documentation covers Linux distribution packages, an Ansible community role, and container deployment. Containerized monitoring requires host namespace access and suitable mounts; some systems also need an extra capability for the timex collector. Certain collectors are off by default because they can have high cardinality, take longer, or consume host resources. The project is Apache 2 licensed and free, with no paid plans listed. Windows users are directed to Windows Exporter.