feat: Добавлена установка Node Exporter на все хосты

- Создана роль node_exporter для установки на LXC контейнеры
- Добавлен плейбук deploy_all_node_exporters.yml
- Настроен ansible.cfg для правильного поиска ролей
- Node Exporter успешно установлен на все 10 хостов
- Prometheus собирает метрики со всех Node Exporters
- Все 14 таргетов в состоянии UP

roles/node_exporter/defaults/main.yml

@@ -0,0 +1,3 @@
+---
+node_exporter_version: "1.7.0"
+node_exporter_port: 9100

roles/node_exporter/tasks/main.yml

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+---
+- name: Install required packages
+  apt:
+    name:
+      - wget
+      - tar
+    state: present
+    update_cache: yes
+  tags: node_exporter
+
+- name: Create node_exporter user
+  user:
+    name: node_exporter
+    system: yes
+    shell: /bin/false
+    home: /nonexistent
+    comment: "Node Exporter Service User"
+  tags: node_exporter
+
+- name: Download Node Exporter
+  get_url:
+    url: "https://github.com/prometheus/node_exporter/releases/download/v{{ node_exporter_version }}/node_exporter-{{ node_exporter_version }}.linux-amd64.tar.gz"
+    dest: "/tmp/node_exporter-{{ node_exporter_version }}.tar.gz"
+    timeout: 30
+    validate_certs: no
+  tags: node_exporter
+
+- name: Extract Node Exporter
+  unarchive:
+    src: "/tmp/node_exporter-{{ node_exporter_version }}.tar.gz"
+    dest: "/tmp/"
+    remote_src: yes
+    creates: "/tmp/node_exporter-{{ node_exporter_version }}.linux-amd64"
+  tags: node_exporter
+
+- name: Install Node Exporter binary
+  copy:
+    src: "/tmp/node_exporter-{{ node_exporter_version }}.linux-amd64/node_exporter"
+    dest: "/usr/local/bin/node_exporter"
+    owner: node_exporter
+    group: node_exporter
+    mode: '0755'
+    remote_src: yes
+  tags: node_exporter
+
+- name: Create systemd service for LXC
+  template:
+    src: node_exporter.service.j2
+    dest: /etc/systemd/system/node_exporter.service
+    owner: root
+    group: root
+    mode: '0644'
+  tags: node_exporter
+
+- name: Create textfile collector directory
+  file:
+    path: /var/lib/node_exporter/textfile_collector
+    state: directory
+    owner: node_exporter
+    group: node_exporter
+    mode: '0755'
+  tags: node_exporter
+
+- name: Clean up temp files
+  file:
+    path: "/tmp/node_exporter-{{ node_exporter_version }}.tar.gz"
+    state: absent
+  tags: node_exporter
+
+- name: Clean up extracted directory
+  file:
+    path: "/tmp/node_exporter-{{ node_exporter_version }}.linux-amd64"
+    state: absent
+  tags: node_exporter
+
+- name: Reload systemd
+  systemd:
+    daemon_reload: yes
+  tags: node_exporter
+
+- name: Enable and start Node Exporter
+  systemd:
+    name: node_exporter
+    enabled: yes
+    state: started
+    daemon_reload: yes
+  tags: node_exporter
+
+- name: Configure UFW for Node Exporter
+  ufw:
+    rule: allow
+    port: "{{ node_exporter_port }}"
+    proto: tcp
+    comment: "Node Exporter metrics"
+  tags: node_exporter
+
+- name: Verify Node Exporter is running
+  wait_for:
+    port: "{{ node_exporter_port }}"
+    host: "{{ ansible_host }}"
+    delay: 3
+    timeout: 60
+  tags: node_exporter

roles/node_exporter/templates/node_exporter.service.j2

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+[Unit]
+Description=Node Exporter
+After=network.target
+Wants=network.target
+
+[Service]
+User=node_exporter
+Group=node_exporter
+Type=simple
+ExecStart=/usr/local/bin/node_exporter \
+  --collector.cpu \
+  --collector.diskstats \
+  --collector.filesystem \
+  --collector.loadavg \
+  --collector.meminfo \
+  --collector.netdev \
+  --collector.netstat \
+  --collector.stat \
+  --collector.time \
+  --collector.uname \
+  --collector.vmstat \
+  --collector.systemd \
+  --collector.textfile \
+  --web.listen-address=:{{ node_exporter_port }}
+
+Restart=always
+RestartSec=3
+
+[Install]
+WantedBy=multi-user.target