compose.yml

version: "3"
services:
    grafana:
      image: grafana/grafana
      container_name: grafana
      restart: unless-stopped
      ports:
          - "3000:3000"
      volumes:
          - grafana-storage:/var/lib/grafana
volumes:
    grafana-storage: {}

compose.yml

version: "3"
services:
    prometheus:
        image: prom/prometheus
        container_name: prometheus
        command:
            - '--config.file=/etc/prometheus/prometheus.yml'
        ports:
            - 9090:9090
        restart: unless-stopped
        volumes:
            - /home/sebmas/docker/prometheus/etc:/etc/prometheus
            - prom_data:/prometheus
volumes:
    prom_data: {}

prometheus.yml

global:
  scrape_interval: 15s
  scrape_timeout: 10s
  evaluation_interval: 15s
alerting:
  alertmanagers:
  - static_configs:
    - targets: []
    scheme: http
    timeout: 10s
    api_version: v1
scrape_configs:
- job_name: prometheus
  honor_timestamps: true
  scrape_interval: 15s
  scrape_timeout: 10s
  metrics_path: /metrics
  scheme: http
  static_configs:
  - targets:
    - localhost:9090

cd /tmp
wget https://github.com/prometheus/node_exporter/releases/download/v1.7.0/node_exporter-1.7.0.linux-armv7.tar.gz
tar -zxf node_exporter-1.7.0.linux-armv7.tar.gz
mv node_exporter-1.7.0.linux-armv7/node_exporter /usr/local/bin
useradd --no-create-home --shell /bin/false node_exporter
chown node_exporter:node_exporter /usr/local/bin/node_exporter
mkdir -p /opt/config/etc/systemd/system/
cd /opt/config/etc/systemd/system
nano node_exporter.service

[Unit]
Description=Node Exporter
Wants=network-online.target
After=network-online.target

[Service]
User=node_exporter
Group=node_exporter
Type=simple
ExecStart=/usr/local/bin/node_exporter
Restart=always
RestartSec=3

[Install]
WantedBy=multi-user.target

ln -s /opt/config/etc/systemd/system/node_exporter.service /etc/systemd/system/
systemctl daemon-reload
systemctl enable node_exporter
systemctl start node_exporter
systemctl status node_exporter

at the end of prometheus.yml

- job_name: rpi
  static_configs:
  - targets: ['192.168.1.20:9100']

1. add data source –> prometheus
2. create dashboard –> import a dashboard –> https://grafana.com/grafana/dashboards/1860-node-exporter-full –> copy id and give it to grafana

sources:

• https://sbcode.net/prometheus/snmp-exporter/
• https://www.mattgerega.com/2022/10/14/getting-synology-snmp-data-into-prometheus/
• https://github.com/ddiiwoong/synology-prometheus/tree/master/snmp-synology

cd /tmp
wget https://github.com/prometheus/snmp_exporter/releases/download/v0.25.0/snmp_exporter-0.25.0.linux-armv7.tar.gz
tar -zxf snmp_exporter-0.25.0.linux-armv7.tar.gz
cd snmp_exporter-0.25.0.linux-armv7
mv snmp_exporter /usr/local/bin/
chown node_exporter:node_exporter /usr/local/bin/snmp_exporter
mkdir /opt/config/snmp_exporter
cd /opt/config/snmp_exporter
wget https://github.com/ddiiwoong/synology-prometheus/blob/master/snmp-synology/snmp-0.24.x.yml
cd /opt/config/etc/systemd/system
nano snmp_exporter

[Unit]
Description=Prometheus SNMP Exporter Service
Wants=network-online.target
After=network-online.target

[Service]
Type=simple
User=node_exporter
Group=node_exporter
ExecStart=/usr/local/bin/snmp_exporter --config.file="/opt/config/snmp_exporter/syno-snmp-0.24.x.yml"
Restart=always
RestartSec=3

[Install]
WantedBy=multi-user.target

systemctl daemon-reload
ln -s /opt/config/etc/systemd/system/snmp_exporter /etc/systemd/system/
systemctl enable snmp_exporter
systemctl start snmp_exporter
ssytemctl status snmp_exporter

- job_name: 'synology'
  static_configs:
  - targets: ['<replace with synology nas ip>']
  metrics_path: /snmp
  params:
    module: [synology]
  relabel_configs:
  - source_labels: [__address__]
    target_label: __param_target
  - source_labels: [__param_target]
    target_label: instance
  - source_labels: [__param_target]
    regex: (.*)
    replacement: <replace with snmp_exporter ip>:9116
    target_label: __address__