Initial commit: arr-stack homelab + local AI

Docker Compose media stack (gluetun, *arr, Jellyfin), Ternary-Bonsai AI
(Open WebUI, Forgejo, optional OpenHands), and Ansible bootstrap for the
SER5 Ubuntu host.

ansible/roles/amd_vulkan/tasks/main.yml

@@ -0,0 +1,102 @@
+---
+# Radeon 680M (RDNA2 iGPU) on SER5 PRO — Mesa Vulkan for llama.cpp / Jellyfin VAAPI
+
+- name: Install software-properties-common (for add-apt-repository)
+  ansible.builtin.apt:
+    name: software-properties-common
+    state: present
+  tags: [amd, vulkan, gpu]
+
+- name: Enable Ubuntu universe and multiverse components
+  ansible.builtin.command: add-apt-repository -y {{ item }}
+  loop:
+    - universe
+    - multiverse
+  register: apt_components
+  # With loop, changed_when runs per item — use item stdout, not .results
+  changed_when: "'Adding component' in (apt_components.stdout | default(''))"
+  failed_when: apt_components.rc is defined and apt_components.rc != 0
+  tags: [amd, vulkan, gpu]
+
+- name: Update apt cache after enabling universe/multiverse
+  ansible.builtin.apt:
+    update_cache: true
+  tags: [amd, vulkan, gpu]
+
+- name: Install AMD / Mesa / Vulkan packages
+  ansible.builtin.apt:
+    name: "{{ amd_vulkan_packages }}"
+    state: present
+    update_cache: false
+  tags: [amd, vulkan, gpu]
+
+- name: Ensure video and render groups exist
+  ansible.builtin.group:
+    name: "{{ item }}"
+    state: present
+  loop:
+    - video
+    - render
+  tags: [amd, vulkan, gpu]
+
+- name: Add stack user to video and render (GPU device access)
+  ansible.builtin.user:
+    name: "{{ stack_owner }}"
+    groups:
+      - video
+      - render
+    append: true
+  tags: [amd, vulkan, gpu]
+
+- name: Check for DRM render nodes
+  ansible.builtin.find:
+    paths: /dev/dri
+    patterns: "renderD*,card*"
+    file_type: any
+  register: dri_nodes
+  tags: [amd, vulkan, gpu]
+  failed_when: false
+
+- name: Report /dev/dri devices
+  ansible.builtin.debug:
+    msg: >-
+      DRM nodes:
+      {{ dri_nodes.files | map(attribute='path') | list | default(['(none found — check kernel / firmware)'], true) }}
+  tags: [amd, vulkan, gpu]
+
+- name: Probe Vulkan (as stack user when possible)
+  become: true
+  become_user: "{{ stack_owner }}"
+  ansible.builtin.command: vulkaninfo --summary
+  register: vulkan_summary
+  changed_when: false
+  failed_when: false
+  tags: [amd, vulkan, gpu]
+
+- name: Show Vulkan summary (first lines)
+  ansible.builtin.debug:
+    msg: "{{ (vulkan_summary.stdout_lines | default(['vulkaninfo failed or not usable yet']))[:40] }}"
+  tags: [amd, vulkan, gpu]
+
+- name: Probe VA-API
+  ansible.builtin.command: vainfo
+  register: vainfo_out
+  changed_when: false
+  failed_when: false
+  tags: [amd, vulkan, gpu]
+
+- name: Show vainfo snippet
+  ansible.builtin.debug:
+    msg: "{{ (vainfo_out.stdout_lines | default(vainfo_out.stderr_lines | default(['vainfo unavailable'])))[:25] }}"
+  tags: [amd, vulkan, gpu]
+
+- name: udev rule — ensure render nodes are accessible by render group
+  ansible.builtin.copy:
+    dest: /etc/udev/rules.d/99-amd-render.rules
+    mode: "0644"
+    content: |
+      # Homelab: AMD GPU / APU render nodes for Docker + Vulkan
+      KERNEL=="renderD*", GROUP="render", MODE="0660"
+      KERNEL=="card*",    GROUP="video",  MODE="0660"
+  notify: Reload udev
+  tags: [amd, vulkan, gpu]