Fix nginx-exporter: back to bridge network with host.docker.internal

host network mode prevented Prometheus from reaching the exporter.
Switched back to bridge with extra_hosts + explicit port mapping.
Added timeout flag to prevent hanging on stub_status fetch.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

docker-compose.yml

@@ -374,8 +374,12 @@ services:
   nginx-exporter:
     image: nginx/nginx-prometheus-exporter:latest
     command:
-      - -nginx.scrape-uri=http://127.0.0.1:8888/nginx_status
-    network_mode: host
+      - -nginx.scrape-uri=http://host.docker.internal:8888/nginx_status
+      - -nginx.timeout=5s
+    extra_hosts:
+      - "host.docker.internal:host-gateway"
+    ports:
+      - "127.0.0.1:9113:9113"
     restart: unless-stopped
 
   blackbox-exporter:

monitoring/prometheus.yml

@@ -42,7 +42,7 @@ scrape_configs:
   # ── nginx ──────────────────────────────────────────────────────────
   - job_name: nginx
     static_configs:
-      - targets: ["host.docker.internal:9113"]
+      - targets: ["nginx-exporter:9113"]
 
   # ── Blackbox probes (HTTP endpoint monitoring) ─────────────────────
   - job_name: blackbox_http