Prometheus, Grafana, blackbox_exporter

monitoring/docker-compose.yml

@@ -0,0 +1,34 @@
+services:
+  prometheus:
+    image: prom/prometheus:latest
+    container_name: prometheus
+    restart: unless-stopped
+    volumes:
+      - ./prometheus.yml:/etc/prometheus/prometheus.yml:ro
+      - prometheus_data:/prometheus
+    ports:
+      - "9091:9090"
+    extra_hosts:
+      - "host.docker.internal:host-gateway" # Damit er deinen Worker findet
+
+  grafana:
+    image: grafana/grafana:latest
+    container_name: grafana
+    restart: unless-stopped
+    volumes:
+      - grafana_data:/var/lib/grafana
+    ports:
+      - "4000:3000"
+    depends_on:
+      - prometheus
+
+  blackbox_exporter:
+    image: prom/blackbox-exporter:latest
+    container_name: blackbox_exporter
+    restart: unless-stopped
+    ports:
+      - "9115:9115"
+
+volumes:
+  prometheus_data:
+  grafana_data:

monitoring/prometheus.yml

@@ -0,0 +1,25 @@
+global:
+  scrape_interval: 15s
+
+scrape_configs:
+  # 1. Scraping deines Node.js Email-Workers
+  - job_name: 'email-worker'
+    static_configs:
+      - targets: ['host.docker.internal:9000']
+
+  # 2. Port-Überwachung deines Mailservers (IMAP 993 & POP3 995)
+  - job_name: 'mailserver_ports'
+    metrics_path: /probe
+    params:
+      module: [tcp_connect] # Prüft nur, ob der TCP-Port offen ist
+    static_configs:
+      - targets:
+        - host.docker.internal:993 # IMAPS
+        - host.docker.internal:995 # POP3S
+    relabel_configs:
+      - source_labels: [__address__]
+        target_label: __param_target
+      - source_labels: [__param_target]
+        target_label: instance
+      - target_label: __address__
+        replacement: blackbox_exporter:9115 # Der Exporter führt den Check aus