Fix Prometheus and Loki permission errors

- Remove user directives from Prometheus and Loki services to allow root access to volumes
- Add resource limits to all monitoring services (Prometheus, Grafana, Uptime Kuma, Loki)
- Fixes permission denied errors when writing to named volumes

docker-compose/monitoring.yml

@@ -17,6 +17,15 @@ services:
   # Access at: http://server-ip:9090
   prometheus:
     image: prom/prometheus:v2.48.1
+    deploy:
+      resources:
+        limits:
+          cpus: '0.75'
+          memory: 512M
+          pids: 1024
+        reservations:
+          cpus: '0.25'
+          memory: 256M
     container_name: prometheus
     restart: unless-stopped
     networks:
@@ -35,7 +44,6 @@ services:
       - '--web.console.libraries=/etc/prometheus/console_libraries'
       - '--web.console.templates=/etc/prometheus/consoles'
       - '--web.enable-lifecycle'
-    user: "${PUID:-1000}:${PGID:-1000}"
     labels:
       - "homelab.category=monitoring"
       - "homelab.description=Metrics collection and time-series database"
@@ -52,6 +60,15 @@ services:
   # Default credentials: admin / admin (change on first login)
   grafana:
     image: grafana/grafana:10.2.3
+    deploy:
+      resources:
+        limits:
+          cpus: '0.50'
+          memory: 256M
+          pids: 512
+        reservations:
+          cpus: '0.25'
+          memory: 128M
     container_name: grafana
     restart: unless-stopped
     networks:
@@ -141,6 +158,15 @@ services:
   # Access at: https://uptime-kuma.${DOMAIN}
   uptime-kuma:
     image: louislam/uptime-kuma:1
+    deploy:
+      resources:
+        limits:
+          cpus: '0.50'
+          memory: 256M
+          pids: 512
+        reservations:
+          cpus: '0.25'
+          memory: 128M
     container_name: uptime-kuma
     restart: unless-stopped
     networks:
@@ -165,6 +191,15 @@ services:
   # Access at: http://server-ip:3100
   loki:
     image: grafana/loki:2.9.3
+    deploy:
+      resources:
+        limits:
+          cpus: '0.75'
+          memory: 512M
+          pids: 1024
+        reservations:
+          cpus: '0.25'
+          memory: 256M
     container_name: loki
     restart: unless-stopped
     networks:
@@ -177,7 +212,6 @@ services:
       - ./config/loki:/etc/loki
       - loki-data:/loki
     command: -config.file=/etc/loki/loki-config.yml
-    user: "${PUID:-1000}:${PGID:-1000}"
     labels:
       - "homelab.category=monitoring"
       - "homelab.description=Log aggregation system"