Node Exporters

Node Exporter is a Prometheus exporter for hardware and OS metrics exposed by Linux kernels. We use it on almost all our VM machines (except for legacy ones) to monitor services that run via systemd, filesystems mounts and disk space.

Deployment

We use deploy Node Exporters as Ansible Role. The role is used with no configuration changes, except for the port, which is defined here in the node_exporter_port variable.

Alerts Configuration

Once Node Exporter up and running, we create Prometheus Sources for it (see here) and alert rules like disk-problems, service down, ...