Initial: Prometheus + Grafana monitoring stack

- Prometheus with 9 scrape targets
- Grafana with Home Server Overview dashboard
- Exporters: node_exporter, cadvisor, postgres_exporter (x3), qbittorrent
- Traefik and Gitea metrics enabled

docker-compose.yml

@@ -0,0 +1,140 @@
+name: monitoring
+
+services:
+  prometheus:
+    image: prom/prometheus:latest
+    container_name: prometheus
+    restart: always
+    user: "0:0"
+    ports:
+      - "127.0.0.1:9090:9090"
+    command:
+      - '--config.file=/etc/prometheus/prometheus.yml'
+      - '--storage.tsdb.path=/prometheus'
+      - '--web.console.libraries=/etc/prometheus/console_libraries'
+      - '--web.console.templates=/etc/prometheus/consoles'
+      - '--web.enable-lifecycle'
+    volumes:
+      - ./prometheus.yml:/etc/prometheus/prometheus.yml:ro
+      - prometheus_data:/prometheus
+    networks:
+      - monitoring
+      - traefik_proxy
+    extra_hosts:
+      - 'host.docker.internal:192.168.1.80'
+
+  grafana:
+    image: grafana/grafana:latest
+    container_name: grafana
+    restart: always
+    user: "0:0"
+    environment:
+      - GF_SECURITY_ADMIN_PASSWORD=${GRAFANA_ADMIN_PASSWORD}
+      - GF_SERVER_ROOT_URL=https://grafana.kzbrd.ru
+      - GF_INSTALL_PLUGINS=grafana-piechart-panel
+    volumes:
+      - grafana_data:/var/lib/grafana
+      - ./grafana/provisioning:/etc/grafana/provisioning:ro
+    labels:
+      - "traefik.enable=true"
+      - "traefik.docker.network=traefik_proxy"
+      - "traefik.http.routers.grafana.rule=Host(`grafana.kzbrd.ru`)"
+      - "traefik.http.routers.grafana.entrypoints=websecure"
+      - "traefik.http.routers.grafana.tls=true"
+      - "traefik.http.routers.grafana.tls.certresolver=myresolver"
+      - "traefik.http.services.grafana.loadbalancer.server.port=3000"
+      - "com.centurylinklabs.watchtower.enable=true"
+    networks:
+      - monitoring
+      - traefik_proxy
+
+  node_exporter:
+    image: prom/node-exporter:latest
+    container_name: node_exporter
+    restart: always
+    command:
+      - '--path.rootfs=/host'
+    pid: host
+    volumes:
+      - /:/host:ro,rslave
+    networks:
+      - monitoring
+
+  cadvisor:
+    image: gcr.io/cadvisor/cadvisor:latest
+    container_name: cadvisor
+    restart: always
+    privileged: true
+    command:
+      - '--port=8081'
+    devices:
+      - /dev/kmsg
+    volumes:
+      - /:/rootfs:ro
+      - /var/run:/var/run:ro
+      - /sys:/sys:ro
+      - /var/lib/docker/:/var/lib/docker:ro
+      - /dev/disk/:/dev/disk:ro
+    networks:
+      - monitoring
+
+  postgres_exporter_pgvector:
+    image: prometheuscommunity/postgres-exporter:latest
+    container_name: postgres_exporter_pgvector
+    restart: always
+    environment:
+      - DATA_SOURCE_NAME=postgresql://postgres:${PGVECTOR_PASSWORD}@host.docker.internal:5432/postgres?sslmode=disable
+    networks:
+      - monitoring
+    extra_hosts:
+      - 'host.docker.internal:192.168.1.80'
+
+  postgres_exporter_langfuse:
+    image: prometheuscommunity/postgres-exporter:latest
+    container_name: postgres_exporter_langfuse
+    restart: always
+    command:
+      - '--web.listen-address=:9188'
+    environment:
+      - DATA_SOURCE_NAME=postgresql://postgres:${LANGFUSE_DB_PASSWORD}@langfuse-postgres-1:5432/langfuse?sslmode=disable
+    networks:
+      - monitoring
+      - langfuse_default
+
+  postgres_exporter_mcpjungle:
+    image: prometheuscommunity/postgres-exporter:latest
+    container_name: postgres_exporter_mcpjungle
+    restart: always
+    command:
+      - '--web.listen-address=:9189'
+    environment:
+      - DATA_SOURCE_NAME=postgresql://mcpjungle:${MCPJUNGLE_DB_PASSWORD}@mcpjungle-db:5432/mcpjungle?sslmode=disable
+    networks:
+      - monitoring
+      - mcpjungle_internal
+
+  qbittorrent_exporter:
+    image: ghcr.io/esanchezm/prometheus-qbittorrent-exporter:latest
+    container_name: qbittorrent_exporter
+    restart: always
+    environment:
+      - QBITTORRENT_HOST=qbittorrent
+      - QBITTORRENT_PORT=8080
+      - QBITTORRENT_API_KEY=${QBIT_PASSWORD}
+    networks:
+      - monitoring
+      - traefik_proxy
+
+networks:
+  monitoring:
+    driver: bridge
+  traefik_proxy:
+    external: true
+  langfuse_default:
+    external: true
+  mcpjungle_internal:
+    external: true
+
+volumes:
+  prometheus_data:
+  grafana_data: