Unfinished

Installing node_exporter

wget https://github.com/prometheus/node_exporter/releases/download/v0.15.2/node_exporter-0.15.2.linux-amd64.tar.gz

tar -xf node_exporter-0.15.2.linux-amd64.tar.gz

sudo mv node_exporter-0.15.2.linux-amd64/node_exporter /usr/local/bin

rm -r node_exporter-0.15.2.linux-amd64*

sudo useradd -rs /bin/false node_exporter

sudo nano /etc/systemd/system/node_exporter.service

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

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

[Install]
WantedBy=multi-user.target

sudo systemctl daemon-reload
sudo systemctl enable node_exporter
sudo systemctl start node_exporter

Installing Prometheus

wget https://github.com/prometheus/prometheus/releases/download/v2.1.0/prometheus-2.1.0.linux-amd64.tar.gz

tar -xf prometheus-2.1.0.linux-amd64.tar.gz

sudo mv prometheus-2.1.0.linux-amd64/prometheus prometheus-2.1.0.linux-amd64/promtool /usr/local/bin

sudo mkdir /etc/prometheus /var/lib/prometheus

sudo mv prometheus-2.1.0.linux-amd64/consoles prometheus-2.1.0.linux-amd64/console_libraries /etc/prometheus

rm -r prometheus-2.1.0.linux-amd64*

Go to /etc/hosts and add the following lines, replace x.x.x.x with the machine’s corresponding IP address

x.x.x.x prometheus-target-1
x.x.x.x prometheus-target-2

We will use /etc/prometheus/prometheus.yml as our configuration file

global:
  scrape_interval: 10s

scrape_configs:
  - job_name: 'prometheus_metrics'
    scrape_interval: 5s
    static_configs:
      - targets: ['localhost:9090']
  - job_name: 'node_exporter_metrics'
    scrape_interval: 5s
    static_configs:
      - targets: ['localhost:9100','prometheus-target-1:9100','prometheus-target-2:9100']

sudo useradd -rs /bin/false prometheus
sudo chown -R prometheus: /etc/prometheus /var/lib/prometheus

Then, we will create a systemd unit file in /etc/systemd/system/prometheus.service with the following contents :

[Unit]
Description=Prometheus
After=network.target

[Service]
User=prometheus
Group=prometheus
Type=simple
ExecStart=/usr/local/bin/prometheus \
    --config.file /etc/prometheus/prometheus.yml \
    --storage.tsdb.path /var/lib/prometheus/ \
    --web.console.templates=/etc/prometheus/consoles \
    --web.console.libraries=/etc/prometheus/console_libraries

[Install]
WantedBy=multi-user.target