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observabilite/observability/vm_observabilite_hardware_desVMs/monitoring_VMhardware.sh

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+#!/bin/bash
+# ---------------------------------------------------------
+# Script d'installation automatique de Node Exporter + Promtail
+# Compatible Debian/Ubuntu
+# ---------------------------------------------------------
+
+set -e  # Stoppe le script en cas d'erreur
+
+# --- Variables globales ---
+NODE_EXPORTER_VERSION="1.7.0"
+PROMTAIL_VERSION="2.9.2"
+LOKI_SERVER_IP="192.168.56.16"   # à modifier selon ton environnement
+HOSTNAME_LABEL=$(hostname)
+
+# --- Vérification utilisateur root ---
+if [ "$EUID" -ne 0 ]; then
+  echo "Ce script doit être exécuté en tant que root (sudo)."
+  exit 1
+fi
+
+echo "🚀 Mise à jour du système..."
+apt update -y && apt install -y wget unzip
+
+# --- Installation de Node Exporter ---
+echo "Installation de Node Exporter v${NODE_EXPORTER_VERSION}..."
+cd /tmp
+wget -q https://github.com/prometheus/node_exporter/releases/download/v${NODE_EXPORTER_VERSION}/node_exporter-${NODE_EXPORTER_VERSION}.linux-amd64.tar.gz
+tar xvf node_exporter-${NODE_EXPORTER_VERSION}.linux-amd64.tar.gz
+mv node_exporter-${NODE_EXPORTER_VERSION}.linux-amd64/node_exporter /usr/local/bin/
+useradd -rs /bin/false nodeusr || true
+
+cat >/etc/systemd/system/node_exporter.service <<EOF
+[Unit]
+Description=Node Exporter
+After=network.target
+
+[Service]
+User=nodeusr
+ExecStart=/usr/local/bin/node_exporter
+
+[Install]
+WantedBy=multi-user.target
+EOF
+
+systemctl daemon-reload
+systemctl enable --now node_exporter
+echo "Node Exporter installé et démarré."
+
+# --- Installation de Promtail ---
+echo "Installation de Promtail v${PROMTAIL_VERSION}..."
+cd /tmp
+wget -q https://github.com/grafana/loki/releases/download/v${PROMTAIL_VERSION}/promtail-linux-amd64.zip
+unzip -o promtail-linux-amd64.zip
+mv promtail-linux-amd64 /usr/local/bin/promtail
+chmod +x /usr/local/bin/promtail
+
+# --- Configuration de Promtail ---
+cat >/etc/promtail-config.yml <<EOF
+server:
+  http_listen_port: 9080
+  grpc_listen_port: 0
+
+positions:
+  filename: /tmp/positions.yaml
+
+clients:
+  - url: http://${LOKI_SERVER_IP}:3100/loki/api/v1/push
+
+scrape_configs:
+  - job_name: system
+    static_configs:
+      - targets:
+          - localhost
+        labels:
+          job: vm-observed
+          host: ${HOSTNAME_LABEL}
+          __path__: /var/log/*.log
+EOF
+
+# --- Service Promtail ---
+cat >/etc/systemd/system/promtail.service <<EOF
+[Unit]
+Description=Promtail
+After=network.target
+
+[Service]
+ExecStart=/usr/local/bin/promtail -config.file=/etc/promtail-config.yml
+Restart=always
+
+[Install]
+WantedBy=multi-user.target
+EOF
+
+systemctl daemon-reload
+systemctl enable --now promtail
+echo "Promtail installé et démarré."
+
+# --- Résumé ---
+echo "Installation terminée avec succès !"
+echo "----------------------------------------"
+echo "Node Exporter : http://$(hostname -I | awk '{print $1}'):9100/metrics"
+echo "Promtail       : config => /etc/promtail-config.yml"
+echo "Loki Server IP : ${LOKI_SERVER_IP}:3100"
+echo "----------------------------------------"