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Monitoring: Prometheus + Grafana

Zur Überwachung der Stabilität des Systems, von Verbrauchswerten und mehr können wir Prometheus und Grafana nutzen.

Klassisches Setup mit Raspberry OS (Debian 12 Bookworm)

Installation von Grafana

https://grafana.com/tutorials/install-grafana-on-raspberry-pi

sudo mkdir -p /etc/apt/keyrings/
wget -q -O - https://apt.grafana.com/gpg.key | gpg --dearmor | sudo tee /etc/apt/keyrings/grafana.gpg > /dev/null
echo "deb https://packages.grafana.com/oss/deb stable main" | sudo tee -a /etc/apt/sources.list.d/grafana.list
sudo apt-get update
sudo apt-get install -y grafana
sudo /bin/systemctl enable grafana-server --now
sudo /bin/systemctl status grafana-server

Nach der Installation ist das Grafana Web Interface unter http://fabaccess.local:3000 erreichbar. Weitere Tipps und Tricks zur Einrichtung von Grafana sind an dieser Stelle aktuell eher Out of Scope und werden nicht behandelt.

Installation von Prometheus

Wir nutzen aktuell Prometheus Version 2.X. Seit kurzem ist auch Prometheus in Version 3 verfügbar. Eetwaige Breaking Changes müssen noch überprüft werden. Siehe https://github.com/prometheus/prometheus/tags

Wir beziehen uns zum Teil auf die Dokumentation von https://pimylifeup.com/raspberry-pi-prometheus

Dedizierten Prometheus User hinzufügen

sudo useradd -m -s /bin/bash prometheus

Prometheus installieren

cd /opt
wget https://github.com/prometheus/prometheus/releases/download/v2.55.1/prometheus-2.55.1.linux-armv7.tar.gz
tar xfz prometheus-2.55.1.linux-armv7.tar.gz
mv prometheus-2.55.1.linux-armv7/ prometheus/
rm prometheus-2.55.1.linux-armv7.tar.gz
 
chown -R prometheus:prometheus prometheus/

Wir fügen etwas Web Security hinzu, da sonst jeder später den Prometheus Web Service ohne Passwort aufrufen kann. Je nach Setup kann das okay sein oder auch nicht. Wir fügen es wie folgt ein (siehe auch https://prometheus.io/docs/guides/basic-auth):

sudo apt install python3-bcrypt
sudo vim /opt/prometheus/gen-pass.py
import getpass
import bcrypt

password = getpass.getpass("password: ")
hashed_password = bcrypt.hashpw(password.encode("utf-8"), bcrypt.gensalt())
print(hashed_password.decode())

Wir führen das Script aus und geben ein Passwort ein

python3 /opt/prometheus/gen-pass.py

Den daraus gewonnenen Output nutzen wir in folgender Konfigurationsdatei, die Benutzername und Passwort enthält:

sudo vim /opt/prometheus/web.yml
basic_auth_users:
    admin: $2b$12$hNf2lSsxfm0.i4a.1kVpSOVyBCfIB51VRjgBUyv6kdnyTlgWj81Ay

Service erstellen und Prometheus starten

sudo vim /etc/systemd/system/prometheus.service
[Unit]
Description=Prometheus Server
Documentation=https://prometheus.io/docs/introduction/overview/
After=network-online.target
 
[Service]
User=prometheus
Restart=on-failure
 
ExecStart=/opt/prometheus/prometheus --web.config.file=/opt/prometheus/web.yml --config.file=/opt/prometheus/prometheus.yml --storage.tsdb.path=/opt/prometheus/data
 
[Install]
WantedBy=multi-user.target
sudo systemctl daemon-reload
sudo systemctl enable prometheus.service --now
sudo systemctl status prometheus.service

Nach dem Start ist Prometheus erreichbar unter http://fabaccess.local:9090.

Installation von FabAccess Prometheus Exporter (Port 9000)

FabAccess hat einen eigenen Exporter für Prometheus. Dieser findet sich unter https://gitlab.com/fabinfra/fabaccess/prometheus-exporter

Der FabAccess Exporter für Prometheus funktioniert nur mit pycapnp Version 1.3.0 oder niedriger. Ab Version 2.0.0 gibt es Fehler, die den Start des Service verhindern. Details

sudo apt install python3-pip python3-venv
 
cd /opt/prometheus/
git clone https://gitlab.com/fabinfra/fabaccess/prometheus-exporter.git fabaccess-exporter --recursive
cd /opt/prometheus/fabaccess-exporter/
python3 -m venv env
. env/bin/activate #activate venv
pip install -r requirements.txt

#pycpnp Overwrite
pip install pycapnp==1.3.0
chown -R prometheus:prometheus /opt/prometheus/fabaccess-exporter/

als Service anlegen und starten

Die Variablen BFFH_USER und BFFH_PASSWORD können mit einem beliebigen Nutzer aus BFFH befüllt werden. Sinnvollerweise hat der verwendete Nutzer mindestens globale Leserechte auf allen Ressourcen. Hierzu kann der Admin-User verwendet, oder ein dedizierter Monitoring-Benutzer angelegt werden. Wir verwenden im Beispiel einen eigenen Nutzer namens fabaccess-prometheus-exporter.

sudo vim /etc/systemd/system/prometheus-fabaccess-exporter.service
[Unit]
Description=Prometheus FabAccess Exporter Service
After=network.target
  
[Service]
Type=simple
User=prometheus
Group=root
Environment="EXPORTER_PORT=9000"
Environment="BFFH_HOST=YOUR.HOST.TLD"
Environment="BFFH_PORT=59661"
Environment="BFFH_USER=fabaccess-prometheus-exporter"
Environment="BFFH_PASSWORD=PASSWORD_OF_PROMETHEUS_USER_IN_BFF"
Environment="POLLING_INTERVAL_SECONDS=5"
ExecStart=/opt/prometheus/fabaccess-exporter/env/bin/python3 /opt/prometheus/fabaccess-exporter/main.py
Restart=always
RestartSec=5
  
[Install]
WantedBy=multi-user.target
sudo systemctl daemon-reload
sudo systemctl enable /etc/systemd/system/prometheus-fabaccess-exporter.service --now
sudo systemctl status prometheus-fabaccess-exporter.service

Sicherheitshinweis
Der Exporter ist im Browser auf dem Port 9000 via http erreichbar. Es ist je Setup zu überprüfen, ob das zu lauschende Interface z.B. nur localhost sein soll!

Installation von mqtt-exporter (Port 9001)

Das Setup basiert auf https://github.com/kpetremann/mqtt-exporter

TLS Support: https://github.com/kpetremann/mqtt-exporter/pull/52 (aktuell nicht verwendet, weil alles auf dem gleichen Host)

sudo apt install python3-pip python3-venv
 
cd /opt/prometheus/
git clone https://github.com/kpetremann/mqtt-exporter.git
cd /opt/prometheus/mqtt-exporter/
python3 -m venv env
. env/bin/activate #activate venv
pip install -r requirements/base.txt
chown -R prometheus:prometheus /opt/prometheus/mqtt-exporter/

Manuell starten und testen

MQTT_ADDRESS=127.0.0.1 MQTT_PORT=1883 MQTT_USERNAME=fablabc MQTT_PASSWORD=THEPASSWORD PROMETHEUS_PORT=9001 /opt/prometheus/mqtt-exporter/env/bin/python3 exporter.py

Als Service

sudo vim /etc/systemd/system/prometheus-mqtt-exporter.service
[Unit]
Description=Prometheus MQTT Exporter
After=network-online.target
 
[Service]
User=prometheus
Restart=on-failure
 
Environment="MQTT_ADDRESS=127.0.0.1"
Environment="MQTT_PORT=1883"
#TLS config - needs merged PR https://github.com/kpetremann/mqtt-exporter/pull/52
#Environment="MQTT_ENABLE_TLS=True"
#Environment="MQTT_TLS_NO_VERIFY=False"
#Environment="MQTT_ADDRESS=YOUR.HOST.TLD"
#Environment="MQTT_PORT=8883"
Environment="MQTT_USERNAME=fablabc"
Environment="MQTT_PASSWORD=THE_PASSWORD"
Environment="PROMETHEUS_PORT=9001"
ExecStart=/opt/prometheus/mqtt-exporter/env/bin/python3 /opt/prometheus/mqtt-exporter/exporter.py
 
[Install]
WantedBy=multi-user.target
sudo systemctl daemon-reload
sudo systemctl enable /etc/systemd/system/prometheus-mqtt-exporter.service --now
sudo journalctl -f -u prometheus-mqtt-exporter.service
Der Log Output (Klicken zum Anzeigen): 
PORT=9001 python3 exporter.py
INFO:mqtt-exporter:subscribing to "#"
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_ty', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_if', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_ofln', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_onln', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_state_0', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_state_1', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_rl_0', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_rl_1', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_rl_2', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_rl_3', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_rl_4', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_rl_5', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_rl_6', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_rl_7', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_rl_8', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_rl_9', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_rl_10', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_rl_11', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_rl_12', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_rl_13', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_rl_14', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_rl_15', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_rl_16', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_rl_17', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_rl_18', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_rl_19', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_rl_20', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_rl_21', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_rl_22', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_rl_23', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_rl_24', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_rl_25', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_rl_26', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_rl_27', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_rl_28', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_rl_29', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_rl_30', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_rl_31', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_swc_0', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_swc_1', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_swc_2', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_swc_3', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_swc_4', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_swc_5', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_swc_6', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_swc_7', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_swc_8', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_swc_9', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_swc_10', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_swc_11', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_swc_12', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_swc_13', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_swc_14', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_swc_15', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_swc_16', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_swc_17', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_swc_18', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_swc_19', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_swc_20', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_swc_21', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_swc_22', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_swc_23', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_swc_24', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_swc_25', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_swc_26', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_swc_27', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_btn_0', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_btn_1', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_btn_2', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_btn_3', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_btn_4', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_btn_5', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_btn_6', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_btn_7', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_btn_8', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_btn_9', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_btn_10', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_btn_11', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_btn_12', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_btn_13', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_btn_14', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_btn_15', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_btn_16', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_btn_17', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_btn_18', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_btn_19', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_btn_20', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_btn_21', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_btn_22', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_btn_23', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_btn_24', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_btn_25', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_btn_26', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_btn_27', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_btn_28', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_btn_29', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_btn_30', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_btn_31', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_so_4', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_so_11', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_so_13', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_so_17', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_so_20', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_so_30', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_so_68', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_so_73', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_so_82', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_so_114', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_so_117', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_lk', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_lt_st', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_bat', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_dslp', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_ver', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_sn_ENERGY_Total', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_sn_ENERGY_Yesterday', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_sn_ENERGY_Today', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_sn_ENERGY_Power', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_sn_ENERGY_ApparentPower', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_sn_ENERGY_ReactivePower', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_sn_ENERGY_Factor', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_sn_ENERGY_Voltage', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_sn_ENERGY_Current', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_POWER', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_UptimeSec', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_Heap', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_Sleep', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_LoadAvg', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_MqttCount', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_Wifi_AP', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_Wifi_Channel', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_Wifi_RSSI', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_Wifi_Signal', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_Wifi_LinkCount', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_ENERGY_Total', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_ENERGY_Yesterday', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_ENERGY_Today', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_ENERGY_Period', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_ENERGY_Power', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_ENERGY_ApparentPower', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_ENERGY_ReactivePower', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_ENERGY_Factor', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_ENERGY_Voltage', labels=())
INFO:mqtt-exporter:creating prometheus metric: PromMetricId(name='mqtt_ENERGY_Current', labels=())

Sicherheitshinweis
Der Exporter ist im Browser auf dem Port 9001 via http erreichbar. Es ist je Setup zu überprüfen, ob das zu lauschende Interface z.B. nur localhost sein soll!

Prometheus Konfiguration ergänzen

Damit die beiden Exporter Daten liefern und diese dann durch Grafana grafisch ausgewertet werden können, benötigen wir eine angepasste Konfiguration:

sudo vim /opt/prometheus/prometheus.yml
global:
  scrape_interval:     15s
  evaluation_interval: 15s

alerting:
  alertmanagers:
  - static_configs:
    - targets:
      # - alertmanager:9093

rule_files:
  # - "first_rules.yml"
  # - "second_rules.yml"

scrape_configs:
  - job_name: 'prometheus'
    static_configs:
    - targets: ['localhost:9090']
  - job_name: 'fabaccess-exporter'
    scrape_interval: 5s
    static_configs:
      - targets: ['localhost:9000']
  - job_name: 'mqtt-exporter'
    scrape_interval: 5s
    static_configs:
      - targets: ['localhost:9001']
sudo systemctl restart prometheus.service

Prometheus Web Oberfläche

Beispiel Screenshot

prometheus.png

Ob unsere Services korrekt laufen, können wir hier auch schnell überprüfen:

Screenshot 2024-11-20 at 21-19-35 Prometheus Time Series Collection and Processing Server.png

Grafana Monitoring Dashboard

Ein  FabAccess Grafana Dashboard kann unter https://grafana.com/grafana/dashboards/22385 heruntergeladen werden.

Datenquelle anlegen

Bevor wir es importieren, legen wir zunächst jedoch unter http://fabaccess.local:3000/connections/datasources die notwendige Prometheus Datenquelle ("Datasource") an. Diese ist in unserem Beispiel http://localhost:9090. Sofern Basic Auth in web.yml konfiguriert wurde, so muss dies hier ebenso eingestellt werden.

grafik.png

Mit "Save & Test" speichern und bestätigen wir. Das Ergebnis sollte akzeptiert werden:

grafik.png

Dashboard importieren

Das Importieren des Dashboards in Grafana ist sehr simpel:

grafik.png

Durch Eingabe der ID des Dashboards ist ein Direktimport möglich. Alternativ kann der json-Inhalt hineingeposted werden:

grafik.png

Beispiel Screenshot

grafana.png

Monitoring Setup mit Docker

Ein alternatives Setup unter Verwendung von Docker findet sich unter https://gitlab.com/fabinfra/fabaccess/grafana

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