Add Aria scrape config, Grafana LB, disable node-exporter

- Add additionalScrapeConfigs for aria-streaming (Spark :5182)
  and k3s-node-exporter (all 4 nodes on :9100)
- Expose Grafana via LoadBalancer at 10.10.88.86
- Disable bundled node-exporter (npu-device-monitor already
  provides node_exporter on hostPort 9100)
- Remove dashboardProviders config (sidecar handles it)

Author: jfreed-dev

ansible/templates/prometheus-values.yml.j2

@@ -23,6 +23,20 @@ prometheus:
     # ARM64 optimizations
     podMonitorSelectorNilUsesHelmValues: false
     serviceMonitorSelectorNilUsesHelmValues: false
+    additionalScrapeConfigs:
+      - job_name: 'aria-streaming'
+        static_configs:
+          - targets: ['10.10.88.120:5182']
+        metrics_path: '/api/metrics/prometheus'
+        scrape_interval: 30s
+      - job_name: 'k3s-node-exporter'
+        static_configs:
+          - targets:
+            - '10.10.88.73:9100'
+            - '10.10.88.74:9100'
+            - '10.10.88.75:9100'
+            - '10.10.88.76:9100'
+        scrape_interval: 30s
 
 alertmanager:
   alertmanagerSpec:
@@ -37,6 +51,9 @@ alertmanager:
 
 grafana:
   adminPassword: "{{ grafana_admin_password | default('admin') }}"
+  service:
+    type: LoadBalancer
+    loadBalancerIP: "{{ grafana_lb_ip | default('10.10.88.86') }}"
   persistence:
     enabled: true
     storageClassName: longhorn
@@ -45,22 +62,11 @@ grafana:
     dashboards:
       enabled: true
       searchNamespace: ALL
-  dashboardProviders:
-    dashboardproviders.yaml:
-      apiVersion: 1
-      providers:
-        - name: 'default'
-          orgId: 1
-          folder: ''
-          type: file
-          disableDeletion: false
-          editable: true
-          options:
-            path: /var/lib/grafana/dashboards/default
 
-# Node exporter for host metrics
+# Node exporter disabled — npu-device-monitor DaemonSet already provides
+# node_exporter metrics on hostPort 9100 on all worker nodes
 nodeExporter:
-  enabled: true
+  enabled: false
 
 # Kube-state-metrics
 kubeStateMetrics: