Добавлена установка Grafana: роли, плейбуки и конфигурация

playbooks/monitoring/install_grafana_final.yml

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+---
+- name: Install and configure Grafana (with health checks)
+  hosts: grafana
+  become: yes
+  vars:
+    grafana_version: "12.3.2"
+    grafana_admin_password: "admin"
+  
+  tasks:
+    - name: Include Grafana role
+      include_role:
+        name: grafana
+    
+    - name: Final verification from control node
+      delegate_to: localhost
+      run_once: yes
+      block:
+        - name: Wait for Grafana to be fully ready
+          pause:
+            seconds: 30
+            prompt: "Waiting for Grafana to complete initialization..."
+        
+        - name: Test Grafana access from control node
+          uri:
+            url: "http://{{ hostvars[groups['grafana'][0]]['ansible_default_ipv4']['address'] | default(groups['grafana'][0]) }}:3000/api/health"
+            method: GET
+            status_code: 200
+            timeout: 30
+          register: final_check
+          until: final_check.status == 200
+          retries: 12  # 12 попыток * 5 секунд = 60 секунд
+          delay: 5
+        
+        - name: Display final success message
+          debug:
+            msg: |
+              🎉 Grafana успешно установлена и готова к работе!
+              
+              Доступ по адресу: http://{{ hostvars[groups['grafana'][0]]['ansible_default_ipv4']['address'] | default(groups['grafana'][0]) }}:3000
+              Логин: admin
+              Пароль: {{ grafana_admin_password }}
+              
+              Для проверки выполните команду:
+              curl http://{{ hostvars[groups['grafana'][0]]['ansible_default_ipv4']['address'] | default(groups['grafana'][0]) }}:3000/api/health
+              
+              Или откройте в браузере:
+              http://{{ hostvars[groups['grafana'][0]]['ansible_default_ipv4']['address'] | default(groups['grafana'][0]) }}:3000