Prometheus Exporter

Prometheus Exporter is a component that collects metrics from a Kubernetes cluster and exposes them in a Prometheus-compatible format. It allows you to monitor cluster health, node load, and resource status.

Accessing the Exporter

Exporter access details are available in the cluster control panel on the Dashboard tab.

Public exporters require basic authentication to access metrics.

Example request to a public exporter:

curl -u admin:'password' -s https://k8s-exporter.hostman.dev/exporter_id/service/metrics

Endpoints and Metrics

Two types of metrics are available:

• node_exporter provides node-level metrics such as CPU usage, memory consumption, disk operations, and network traffic.
• kube_state_exporter provides Kubernetes object metrics, including the state of pods, deployments, replicas, nodes, and other resources retrieved from the Kubernetes API.

Public endpoints:

• Node metrics:

https://k8s-exporter.hostman.dev/exporter_id/node-exporter/metrics

• Kubernetes metrics:

https://k8s-exporter.hostman.dev/exporter_id/service/metrics

exporter_id is the unique exporter identifier available in the control panel.

Implementation Details

Exporters are available in two modes:

• Public, accessible over HTTPS with basic authentication
• Private, accessible within a private network

Ports:

• 9100 for node_exporter
• 9308 for kube_state_exporter

For clusters with three master nodes, metrics must be collected from each node separately.