#!/bin/bash

set -e

# === VARIABLES ===
NODE_EXPORTER_VERSION="1.8.1"
EXPORTERS_DIR="/opt/proxmox-exporters"
PROXMOX_API_USER="root@pam"    # CAMBIA ESTO si usas otro usuario
PROXMOX_API_PASSWORD="Goleador28092310"  # CAMBIA ESTO
PROXMOX_API_HOST="https://localhost:8006"

# === Node Exporter ===
echo "[*] Instalando node_exporter..."

mkdir -p $EXPORTERS_DIR
cd $EXPORTERS_DIR

wget -q https://github.com/prometheus/node_exporter/releases/download/v${NODE_EXPORTER_VERSION}/node_exporter-${NODE_EXPORTER_VERSION}.linux-amd64.tar.gz
tar -xzf node_exporter-${NODE_EXPORTER_VERSION}.linux-amd64.tar.gz
cp -f node_exporter-${NODE_EXPORTER_VERSION}.linux-amd64/node_exporter /usr/local/bin/

cat <<EOF >/etc/systemd/system/node_exporter.service
[Unit]
Description=Prometheus Node Exporter
After=network.target

[Service]
User=nobody
ExecStart=/usr/local/bin/node_exporter
Restart=on-failure

[Install]
WantedBy=multi-user.target
EOF

systemctl daemon-reexec
systemctl enable --now node_exporter
echo "[✔] node_exporter instalado en el puerto 9100"

# === Proxmox Exporter ===
echo "[*] Instalando prometheus-pve-exporter..."

apt update -qq && apt install -y python3-venv git

cd $EXPORTERS_DIR
git clone https://github.com/prometheus-pve/prometheus-pve-exporter.git
cd prometheus-pve-exporter
python3 -m venv venv
source venv/bin/activate
pip install .

cat <<EOF >config.yaml
proxmox:
  url: "$PROXMOX_API_HOST"
  user: "$PROXMOX_API_USER"
  password: "$PROXMOX_API_PASSWORD"
  verify_ssl: false

listen:
  address: "0.0.0.0"
  port: 9221
EOF

cat <<EOF >/etc/systemd/system/prometheus-pve-exporter.service
[Unit]
Description=Proxmox VE Exporter
After=network.target

[Service]
WorkingDirectory=$EXPORTERS_DIR/prometheus-pve-exporter
ExecStart=$EXPORTERS_DIR/prometheus-pve-exporter/venv/bin/pve_exporter --config.file config.yaml
Restart=on-failure

[Install]
WantedBy=multi-user.target
EOF

systemctl daemon-reexec
systemctl enable --now prometheus-pve-exporter
echo "[✔] prometheus-pve-exporter instalado en el puerto 9221"

# === Fin ===
echo ""
echo "✅ Exporters desplegados:"
echo "  - http://$(hostname -I | awk '{print $1}'):9100/metrics"
echo "  - http://$(hostname -I | awk '{print $1}'):9221/metrics"