monitoring: системные дашборды + multi-server (file_sd), readme

stacks/monitoring/prometheus/prometheus.yml

@@ -9,20 +9,12 @@ scrape_configs:
     static_configs:
       - targets: ['localhost:9090']
 
+  # Хосты: новый сервер = добавить файл в targets/node/<name>.yml + reload
   - job_name: node
-    static_configs:
-      - targets: ['node-exporter:9100']
-        labels:
-          instance: fr1
+    file_sd_configs:
+      - files: ['/etc/prometheus/targets/node/*.yml']
 
+  # Контейнеры
   - job_name: cadvisor
-    static_configs:
-      - targets: ['cadvisor:8080']
-        labels:
-          instance: fr1
-
-  # de1 будет добавлен позже (через туннель AmneziaWG):
-  # - job_name: node-de1
-  #   static_configs:
-  #     - targets: ['10.8.1.X:9100']
-  #       labels: { instance: de1 }
+    file_sd_configs:
+      - files: ['/etc/prometheus/targets/cadvisor/*.yml']

stacks/monitoring/prometheus/targets/cadvisor/fr1.yml

@@ -0,0 +1,3 @@
+- targets: ['cadvisor:8080']
+  labels:
+    instance: fr1

stacks/monitoring/prometheus/targets/node/fr1.yml

@@ -0,0 +1,3 @@
+- targets: ['node-exporter:9100']
+  labels:
+    instance: fr1