feat: initial installation role for prometheus

README.md

@@ -0,0 +1,39 @@
+# ansible-role-prometheus
+
+Installs Prometheus from GitHub releases on Linux. Architecture is auto-detected.
+The role is idempotent: it only downloads and extracts when the version changes.
+
+The service user and group must be created beforehand.
+Prometheus configuration (`prometheus.yml`) is out of scope for this role.
+
+## Requirements
+
+- Ansible >= 2.14
+
+## Role Variables
+
+| Variable | Default | Description |
+|---|---|---|
+| `prometheus_version` | `""` | Version to install (empty = latest) |
+| `prometheus_user` | `prometheus` | User to run Prometheus |
+| `prometheus_group` | `prometheus` | Group to run Prometheus |
+| `prometheus_install_dir` | `/opt/prometheus` | Binary and assets directory |
+| `prometheus_data_dir` | `/var/lib/prometheus` | TSDB storage directory |
+| `prometheus_config_dir` | `/etc/prometheus` | Configuration directory |
+| `prometheus_service_enabled` | `true` | Enable service at boot |
+| `prometheus_service_state` | `started` | Service state after installation |
+
+## Example Playbook
+
+```yaml
+- hosts: monitoring_servers
+  roles:
+    - role: ansible-role-prometheus
+      vars:
+        prometheus_user: prometheus
+        prometheus_group: prometheus
+```
+
+## License
+
+MIT