Refactor llama_server role for Windows support and EL-specific setup

- Added Windows-specific tasks for llama_server role, including installation of dependencies, setup of services using NSSM, and configuration of firewall rules.
- Introduced a new task file for Windows Exporter setup.
- Consolidated EL-specific setup tasks into a separate include file.
- Updated inventory to include additional host for llama server.
- Adjusted error handling in Prometheus service removal task to prevent failures.

ansible/roles/llama_server/tasks/windows/llama_exporter.yml

@@ -0,0 +1,163 @@
+---
+# Windows Exporter tasks for llama_server role
+
+- name: Define Windows Exporter paths
+  ansible.builtin.set_fact:
+    __exporter_install_dir: "{{ llama_server_windows_install_dir }}\\exporter"
+    __exporter_script: "{{ llama_server_windows_install_dir }}\\exporter\\llama_exporter.py"
+    __exporter_venv_path: "{{ llama_server_windows_install_dir }}\\exporter\\.venv"
+    __exporter_venv_python: "{{ llama_server_windows_install_dir }}\\exporter\\.venv\\Scripts\\python.exe"
+    __exporter_env: "LLAMA_EXPORTER_PORT={{ llama_server_windows_exporter_port | default(9550) }}"
+    __exporter_interval: "{{ llama_server_windows_exporter_interval | default(15) }}"
+    __exporter_timeout: "{{ llama_server_windows_exporter_timeout | default(5) }}"
+
+- name: Create exporter directories
+  ansible.windows.win_file:
+    path: "{{ item }}"
+    state: directory
+  loop:
+    - "{{ llama_server_windows_install_dir }}\\exporter"
+
+- name: Copy Windows Exporter script
+  ansible.windows.win_copy:
+    src: scripts/llama_exporter.py
+    dest: "{{ __exporter_script }}"
+
+- name: Install Python packages for Windows Exporter
+  ansible.windows.win_stat:
+    path: "{{ __exporter_venv_python }}"
+  register: __exporter_venv_python_check
+
+- name: Create exporter virtualenv
+  ansible.windows.win_command:
+    argv:
+      - "{{ llama_server_windows_python_path }}"
+      - -m
+      - venv
+      - "{{ __exporter_venv_path }}"
+  changed_when: false
+  when: not __exporter_venv_python_check.stat.exists
+
+- name: Install Python packages for Windows Exporter
+  ansible.windows.win_command:
+    argv:
+      - "{{ __exporter_venv_python }}"
+      - -m
+      - pip
+      - install
+      - --upgrade
+      - pip
+      - setuptools
+  changed_when: false
+
+- name: Remove existing exporter service if present
+  ansible.windows.win_service:
+    name: llama-exporter
+    state: absent
+  register: __exporter_remove_service
+  failed_when: false
+
+- name: Set exporter targets environment variable if provided
+  ansible.builtin.set_fact:
+    __exporter_targets_env: "LLAMA_TARGETS={{ llama_server_windows_exporter_targets | to_json }}"
+  when: llama_server_windows_exporter_targets | default([]) | length > 0
+
+- name: Install Windows Exporter service via NSSM
+  ansible.windows.win_command:
+    argv:
+      - "{{ __nssm_exe }}"
+      - install
+      - llama-exporter
+      - "{{ __exporter_venv_python }}"
+      - "{{ __exporter_script }}"
+  args:
+    chdir: "{{ __exporter_install_dir }}"
+  register: __exporter_nssm_install
+  changed_when: __exporter_nssm_install.rc == 0
+
+- name: Set exporter AppDirectory via NSSM
+  ansible.windows.win_command:
+    argv:
+      - "{{ __nssm_exe }}"
+      - set
+      - llama-exporter
+      - AppDirectory
+      - "{{ __exporter_install_dir }}"
+
+- name: Configure exporter stdout log via NSSM
+  ansible.windows.win_command:
+    argv:
+      - "{{ __nssm_exe }}"
+      - set
+      - llama-exporter
+      - AppStdout
+      - "{{ llama_server_windows_install_dir }}\\exporter-service.out.log"
+
+- name: Configure exporter stderr log via NSSM
+  ansible.windows.win_command:
+    argv:
+      - "{{ __nssm_exe }}"
+      - set
+      - llama-exporter
+      - AppStderr
+      - "{{ llama_server_windows_install_dir }}\\exporter-service.err.log"
+
+- name: Set exporter environment variables
+  ansible.windows.win_command:
+    argv:
+      - "{{ __nssm_exe }}"
+      - set
+      - llama-exporter
+      - AppEnvironmentExtra
+      - "{{ (__exporter_env ~ (('\n' ~ __exporter_targets_env) if (__exporter_targets_env is defined) else '')) }}"
+  when:
+    - __exporter_env | default('') != ''
+
+- name: Set exporter Start mode to AUTO via NSSM
+  ansible.windows.win_command:
+    argv:
+      - "{{ __nssm_exe }}"
+      - set
+      - llama-exporter
+      - Start
+      - SERVICE_AUTO_START
+
+- name: Ensure Windows Exporter service is running
+  ansible.windows.win_service:
+    name: llama-exporter
+    start_mode: auto
+    state: restarted
+  when: not ansible_check_mode | default(false)
+
+- name: Wait for exporter to listen on port
+  ansible.windows.win_wait_for:
+    port: "{{ llama_server_windows_exporter_port | default(9550) }}"
+    delay: 5
+    timeout: 30
+  when: not ansible_check_mode | default(false)
+
+- name: Set firewall remote IPs when string provided
+  ansible.builtin.set_fact:
+    llama_server_windows_remoteip: "{{ llama_server_windows_sources }}"
+  when:
+    - llama_server_windows_sources is defined
+    - llama_server_windows_sources is string
+
+- name: Set firewall remote IPs when list provided
+  ansible.builtin.set_fact:
+    llama_server_windows_remoteip: "{{ llama_server_windows_sources | join(',') }}"
+  when:
+    - llama_server_windows_sources is defined
+    - not (llama_server_windows_sources is string)
+
+- name: Allow exporter port through Windows Firewall
+  community.windows.win_firewall_rule:
+    name: Llama Exporter "{{ llama_server_windows_exporter_port | default(9550) }}"
+    localport: "{{ llama_server_windows_exporter_port | default(9550) }}"
+    protocol: tcp
+    direction: in
+    action: allow
+    enabled: true
+    # Provide one or more IPs/CIDRs in llama_server_windows_sources (e.g. ['203.0.113.10'])
+    remoteip: "{{ llama_server_windows_remoteip | default(omit) }}"
+    state: present