add the ansible playbooks for the monitoring stack

ansible/playbook.yml

@@ -0,0 +1,37 @@
+---
+- name: Deploy monitoring stack on RPi
+  hosts: monitoring
+  become: true
+  
+  vars:
+    # Architecture detection for ARM
+    arch_map:
+      armv7l: "armv7"
+      aarch64: "arm64"
+      x86_64: "amd64"
+    
+  pre_tasks:
+    - name: Gather architecture
+      ansible.builtin.set_fact:
+        go_arch: "{{ arch_map[ansible_architecture] | default('arm64') }}"
+    
+    - name: Update apt cache
+      ansible.builtin.apt:
+        update_cache: true
+        cache_valid_time: 3600
+      when: ansible_os_family == "Debian"
+  
+  roles:
+    - common
+    - prometheus
+    - snmp_exporter
+    - promtail
+    - grafana
+  
+  post_tasks:
+    - name: Display access information
+      ansible.builtin.debug:
+        msg:
+          - "Grafana: http://{{ ansible_host }}:3000 (admin/admin)"
+          - "Prometheus: http://{{ ansible_host }}:9090"
+          - "Syslog listener: {{ ansible_host }}:514 (UDP)"