Add playbooks/install-node-exporter.yml

playbooks/install-node-exporter.yml

@@ -0,0 +1,79 @@
+- name: Install Node Exporter from binary
+  hosts: all
+  become: true
+
+  vars:
+    node_exporter_version: "1.9.1"
+    node_exporter_user: "node_exporter"
+    node_exporter_listen: "0.0.0.0:9100"
+    node_exporter_bin_dir: "/usr/local/bin"
+    node_exporter_service_path: "/etc/systemd/system/node_exporter.service"
+    node_exporter_arch_map:
+      x86_64: "amd64"
+      aarch64: "arm64"
+      armv7l: "armv7"
+    node_exporter_arch: "{{ node_exporter_arch_map[ansible_architecture] | default('amd64') }}"
+
+  tasks:
+    - name: Debug detected architecture
+      debug:
+        msg: "Detected architecture: {{ ansible_architecture }} -> using {{ node_exporter_arch }} build"
+
+    - name: Ensure node_exporter user exists
+      user:
+        name: "{{ node_exporter_user }}"
+        shell: /usr/sbin/nologin
+        system: true
+        create_home: false
+
+    - name: Download Node Exporter archive
+      get_url:
+        url: "https://github.com/prometheus/node_exporter/releases/download/v{{ node_exporter_version }}/node_exporter-{{ node_exporter_version }}.linux-{{ node_exporter_arch }}.tar.gz"
+        dest: "/tmp/node_exporter.tar.gz"
+        mode: "0644"
+
+    - name: Extract Node Exporter binary
+      unarchive:
+        src: "/tmp/node_exporter.tar.gz"
+        dest: "/tmp/"
+        remote_src: true
+
+    - name: Move Node Exporter binary into place
+      command: mv /tmp/node_exporter-{{ node_exporter_version }}.linux-{{ node_exporter_arch }}/node_exporter {{ node_exporter_bin_dir }}/node_exporter
+
+    - name: Set binary permissions
+      file:
+        path: "{{ node_exporter_bin_dir }}/node_exporter"
+        mode: "0755"
+        owner: root
+        group: root
+
+    - name: Create systemd service
+      copy:
+        dest: "{{ node_exporter_service_path }}"
+        content: |
+          [Unit]
+          Description=Prometheus Node Exporter
+          After=network.target
+
+          [Service]
+          User={{ node_exporter_user }}
+          ExecStart={{ node_exporter_bin_dir }}/node_exporter --web.listen-address={{ node_exporter_listen }}
+          Restart=always
+
+          [Install]
+          WantedBy=multi-user.target
+      notify: Restart node_exporter
+
+    - name: Enable and start node_exporter
+      systemd:
+        name: node_exporter
+        enabled: true
+        state: started
+        daemon_reload: true
+
+  handlers:
+    - name: Restart node_exporter
+      systemd:
+        name: node_exporter
+        state: restarted