Granafa Host Monitoring Configuration

1. Install node exporter

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wget https://github.com/prometheus/node_exporter/releases/download/v1.3.1/node_exporter-1.3.1.linux-amd64.tar.gz
tar  xvfz node_exporter-1.3.1.linux-amd64.tar.gz
mv node_exporter-1.3.1.linux-amd64/node_exporter /usr/local/bin/

If you cannot reach GitHub, refer to: Several ways to access GitHub from mainland China .

2. Configure and start the exporter

Add a Systemd configuration

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vim /etc/systemd/system/node_exporter.service

Add the following content:

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[Unit]
Description=Node Exporter
After=network.target

[Service]
User=root
Group=root
Type=simple
ExecStart=/usr/local/bin/node_exporter

[Install]
WantedBy=multi-user.target

Start the exporter

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systemctl daemon-reload
systemctl start node_exporter

Enable it at boot

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systemctl enable node_exporter

Check the metrics endpoint locally

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curl localhost:9100/metric

<html>
			<head><title>Node Exporter</title></head>
			<body>
			<h1>Node Exporter</h1>
			<p><a href="/metrics">Metrics</a></p>
			</body>
			</html>

3. Prometheus configuration

Add a job

Since Prometheus is deployed on Kubernetes, we edit the ConfigMap directly here:

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kubectl -n monitor edit cm prometheus-server

Under the scrape_configs field, add the following content:

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scrape_configs:
  - job_name: dev
    static_configs:
      - targets: ["1.1.1.1:9100"]
        labels:
          instance: dev

Check the targets

At this point the endpoint’s status is Up, which means data is being reported successfully.

4. Grafana configuration

Here you first need to add a Prometheus data source, then import the Grafana dashboard, and you can see the panels. Reference: Building Kubernetes monitoring with Prometheus and Grafana .

Many people use 8919 for host monitoring, but I find the dashboard a bit complex; here I use 1860. The result is shown below:

Granafa Host Monitoring Configuration

1. Install node exporter

2. Configure and start the exporter

3. Prometheus configuration

4. Grafana configuration

See Also