Différences

Ci-dessous, les différences entre deux révisions de la page.

--- tech:notes_prometheus [2025/04/04 19:46] – Jean-Baptiste
+++ tech:notes_prometheus [2026/07/16 11:45] (Version actuelle) – Jean-Baptiste
@@ Ligne 1: / Ligne 1: @@
+<!DOCTYPE markdown>
+{{tag>Brouillon}}
+# Notes Prometheus
+Voir :
+* https://linuxfr.org/news/decouverte-de-l-outil-de-supervision-prometheus
+* https://www.scaleway.com/en/docs/configure-prometheus-monitoring-with-grafana/
+* PromQL
+* https://enix.io/fr/blog/comment-creer-exporter-prometheus/
+Voir aussi :
+* Prometheus VictoriaMetrics victoriadb
+* Alertmanager (as part of Prometheus)
+    * https://developers.redhat.com/articles/2023/10/04/5-steps-build-self-healing-server-alertmanager
+Voir Identity correlation / CorrelationId
+* https://en.wikipedia.org/wiki/Identity_correlation
+* https://opentelemetry.io/
+* https://grafana.com/oss/tempo/
+## Serveur
+~~~bash
+#docker run -p 9090:9090 -v ~/prometheus.yml:/etc/prometheus/prometheus.yml prom/prometheus
+mkdir -p prometheus/nodes
+#sudo docker run -p 9090:9090 -v ~/prometheus:/etc/prometheus prom/prometheus
+podman run -p 9090:9090 -v ~/prometheus:/etc/prometheus docker.io/prom/prometheus
+~~~
+Config
+`prometheus.yml`
+~~~yaml
+# my global config
+global:
+  scrape_interval:     15s # Set the scrape interval to every 15 seconds. Default is every 1 minute.
+  evaluation_interval: 15s # Evaluate rules every 15 seconds. The default is every 1 minute.
+  # scrape_timeout is set to the global default (10s).
+# Alertmanager configuration
+alerting:
+  alertmanagers:
+  - static_configs:
+    - targets:
+      # - alertmanager:9093
+# Load rules once and periodically evaluate them according to the global 'evaluation_interval'.
+rule_files:
+  # - "first_rules.yml"
+  # - "second_rules.yml"
+# A scrape configuration containing exactly one endpoint to scrape:
+# Here it's Prometheus itself.
+scrape_configs:
+  # The job name is added as a label `job=<job_name>` to any timeseries scraped from this config.
+  - job_name: 'prometheus'
+    # metrics_path defaults to '/metrics'
+    # scheme defaults to 'http'.
+    # static_configs:
+    # - targets: ['localhost:9090']
+  - job_name: 'node'
+    file_sd_configs:
+        - files: [ "/etc/prometheus/nodes/*.yml" ]
+~~~
+`prometheus/nodes/vm1.yml`
+~~~yaml
+- targets: [ "172.17.0.1:9100" ]
+  labels:
+      # Vous pouvez ajouter ce que vous voulez pour taguer la machine
+      host: "vm1"
+~~~
+## Exporter (client)
+Voir aussi :
+* check-mk-agent
+Créer un compte **node_exporter**
+`/etc/systemd/system/node_exporter.service`
+~~~ini
+[Unit]
+Description=node_exporter
+Wants=network-online.target
+After=network-online.target
+[Service]
+User=node_exporter
+Group=node_exporter
+Restart=on-failure
+Type=simple
+ExecStart=/usr/local/bin/node_exporter --collector.systemd --collector.ntp --collector.processes --collector.tcpstat
+[Install]
+WantedBy=multi-user.target
+~~~
+# Grafana
+Prometheus
+Voir
+~~~bash
+docker run -d --name=grafana -p 3000:3000 grafana/grafana
+~~~
+# Voir https://grafana.com/docs/grafana/latest/administration/configure-docker/
+`docker-compose.yml`
+~~~yaml
+version: '3.7'
+services:
+  grafana:
+    image: grafana/grafana
+    ports:
+      - 3000:3000
+	volume:
+	  - "$PWD/data:/var/lib/grafana"
+~~~
+Run Grafana container with persistent storage (recommended)
+Create a persistent volume for your data in /var/lib/grafana (database and plugins)
+~~~bash
+docker volume create grafana-storage
+~~~
+Start grafana
+~~~bash
+docker run -d -p 3000:3000 --name=grafana -v grafana-storage:/var/lib/grafana grafana/grafana
+~~~
+Run Grafana container using bind mounts
+You may want to run Grafana in Docker but use folders on your host for the database or configuration. When doing so, it becomes important to start the container with a user that is able to access and write to the folder you map into the container.
+~~~bash
+mkdir data # creates a folder for your data
+ID=$(id -u) # saves your user id in the ID variable
+# starts grafana with your user id and using the data folder
+#docker run -d --user $ID --volume "$PWD/data:/var/lib/grafana" -p 3000:3000 grafana/grafana:7.2.1
+podman run --volume "$PWD/data:/var/lib/grafana" -p 3000:3000 docker.io/grafana/grafana:7.2.1
+~~~