// Aula 4 - Usando o Node Exporter

https://prometheus.io/download/

# wget https://github.com/prometheus/node_exporter/releases/download/v1.5.0/node_exporter-1.5.0.linux-amd64.tar.gz

# tar -xzf node_exporter-*linux-amd64.tar.gz

# ls node_exporter-*.linux-amd64/

# cp node_exporter-*.linux-amd64/node_exporter /usr/local/bin/

# chown prometheus.prometheus /usr/local/bin/node_exporter

# node_exporter

# vim /etc/prometheus/prometheus.yml

  - job_name: node
    static_configs:
      - targets: ["localhost:9100"]
      
!!!! TOME CUIDADO COM OS ESPAÇOS !!!!!

# firewall-cmd --add-port=9100/tcp --permanent

# firewall-cmd --reload 

# systemctl restart prometheus

# systemctl status prometheus

# touch /etc/systemd/system/node_exporter.service

# cat > /etc/systemd/system/node_exporter.service << 'EOL'
[Unit]
Description=Node Exporter Prometheus
Wants=network-online.target
After=network-online.target

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

[Install]
WantedBy=multi-user.target
EOL

# systemctl daemon-reload

# systemctl enable --now node_exporter

# systemctl status node_exporter

# ss -altnp | grep 9100

http://SEU_IP:9100/metrics

http://SEU_IP:9090/targets

process_resident_memory_bytes{job="node"}

rate(node_network_receive_bytes_total[1m])