Add GPU monitoring services and configurations

- Create systemd service templates for llama_exporter, nvidia_exporter, and podman.
- Add Prometheus configuration template for GPU metrics scraping.
- Introduce variables for GPU monitoring role in main.yml.
- Implement tasks for syncing llama models, including user setup and package installation.
- Update podman tasks to ensure proper sudo access and lingering for the podman user.
- Modify inventory to include gpu_monitoring group.
- Add Terraform modules for deploying Vaultwarden, including ingress and service configurations.
- Create Grafana dashboard for real-time GPU monitoring metrics.
- Update secrets and environment files to include Vaultwarden admin token.

ansible/roles/gpu_monitoring/tasks/nvidia_exporter.yml

@@ -0,0 +1,84 @@
+---
+# NVIDIA GPU Exporter using NVML (pynvml)
+# Works with consumer GPUs (RTX/GTX) and datacenter GPUs
+# No DCGM required - uses pynvml Python library
+
+- name: Create NVIDIA exporter group
+  ansible.builtin.group:
+    name: "{{ nvidia_exporter_user }}"
+    state: present
+    system: true
+  become: true
+
+- name: Create NVIDIA exporter user
+  ansible.builtin.user:
+    name: "{{ nvidia_exporter_user }}"
+    group: "{{ nvidia_exporter_user }}"
+    home: "{{ nvidia_exporter_user_home }}"
+    system: true
+    create_home: true
+    shell: /usr/sbin/nologin
+  become: true
+
+- name: Create NVIDIA exporter install directory
+  ansible.builtin.file:
+    path: "{{ item }}"
+    state: directory
+    owner: "{{ nvidia_exporter_user }}"
+    group: "{{ nvidia_exporter_user }}"
+    mode: "0755"
+  loop:
+    - "{{ nvidia_exporter_install_dir }}"
+    - "{{ nvidia_exporter_install_dir }}/logs"
+  become: true
+
+- name: Copy NVIDIA exporter script
+  ansible.builtin.copy:
+    src: nvidia_gpu_exporter.py
+    dest: "{{ nvidia_exporter_script_path }}"
+    owner: "{{ nvidia_exporter_user }}"
+    group: "{{ nvidia_exporter_user }}"
+    mode: "0755"
+  become: true
+  notify:
+    - Restart nvidia_exporter
+
+- name: Create Python virtual environment for NVIDIA exporter
+  ansible.builtin.command:
+    cmd: "{{ ansible_facts['python']['executable'] }} -m venv {{ nvidia_exporter_venv_path }}"
+    creates: "{{ nvidia_exporter_venv_path }}/bin/activate"
+  become: true
+
+- name: Install nvidia-ml-py in NVIDIA exporter venv
+  ansible.builtin.pip:
+    name: "nvidia-ml-py"
+    virtualenv: "{{ nvidia_exporter_venv_path }}"
+    state: present
+  become: true
+
+- name: Fix ownership of NVIDIA exporter directory
+  ansible.builtin.file:
+    path: "{{ nvidia_exporter_install_dir }}"
+    owner: "{{ nvidia_exporter_user }}"
+    group: "{{ nvidia_exporter_user }}"
+    recurse: true
+  become: true
+
+- name: Copy NVIDIA exporter systemd service
+  ansible.builtin.template:
+    src: nvidia_exporter.service.j2
+    dest: "/etc/systemd/system/{{ nvidia_exporter_service_name }}.service"
+    owner: root
+    group: root
+    mode: "0644"
+  become: true
+  notify:
+    - Reload systemd daemon
+    - Restart nvidia_exporter
+
+- name: Ensure NVIDIA exporter is enabled and started
+  ansible.builtin.systemd:
+    name: "{{ nvidia_exporter_service_name }}"
+    enabled: true
+    state: started
+  become: true