feat: add configuration for GPU node setup and update Ollama role for cross-platform support

ansible/host_vars/debian.yaml

@@ -0,0 +1,7 @@
+# Host vars for: debian (k3s storage agent)
+ansible_python_interpreter: /usr/bin/python3.11
+
+k3s_node_labels:
+  node-role: storage
+
+k3s_node_taints: []

ansible/host_vars/minisforum.yaml

@@ -0,0 +1,2 @@
+# Host vars for: minisforum (k3s server)
+ansible_python_interpreter: /usr/bin/python3.13

ansible/inventory.yaml

@@ -23,3 +23,10 @@ all:
         mac-mini:
           ansible_host: 192.168.7.96
           ansible_python_interpreter: /usr/bin/python3
+
+    gpu_workstation:
+      hosts:
+        gpu-node:
+          ansible_host: 192.168.7.98
+          ansible_port: 430
+          ansible_python_interpreter: /usr/bin/python3.12

ansible/playbooks/setup-gpu-node.yaml

@@ -0,0 +1,12 @@
+# Config for: gpu-node workstation full setup
+# Applied by: ansible-playbook -i ansible/inventory.yaml ansible/playbooks/setup-gpu-node.yaml
+- name: gpu-node setup
+  hosts: gpu_workstation
+  become: true
+
+  roles:
+    - role: common
+    - role: nvidia
+    - role: k3s-agent
+    - role: ollama
+    - role: glances

ansible/roles/k3s-agent/tasks/main.yaml

@@ -1,7 +1,8 @@
 ---
 # Part of role: k3s-agent
 # Called by: ansible/playbooks/join-debian-agent.yaml
-# Description: Installs K3s in agent mode, joins the cluster, and labels the node as storage.
+#            ansible/playbooks/setup-gpu-node.yaml
+# Description: Installs K3s in agent mode, joins the cluster, labels and taints the node.
 
 - name: Download and install K3s agent
   ansible.builtin.shell:
@@ -20,11 +21,24 @@
     enabled: true
   become: true
 
-- name: Label node as storage
+- name: Apply node labels
   ansible.builtin.shell:
     cmd: >
-      k3s kubectl label node nik-debian
-      node-role=storage --overwrite
+      k3s kubectl label node {{ ansible_hostname }}
+      {{ item.key }}={{ item.value }} --overwrite
+  loop: "{{ k3s_node_labels | dict2items }}"
   delegate_to: minisforum
   become: true
   changed_when: false
+  when: k3s_node_labels is defined and k3s_node_labels | length > 0
+
+- name: Apply node taints
+  ansible.builtin.shell:
+    cmd: >
+      k3s kubectl taint node {{ ansible_hostname }}
+      {{ item }} --overwrite
+  loop: "{{ k3s_node_taints }}"
+  delegate_to: minisforum
+  become: true
+  changed_when: false
+  when: k3s_node_taints is defined and k3s_node_taints | length > 0

ansible/roles/ollama/handlers/main.yaml

@@ -1,8 +1,17 @@
 ---
 # Part of role: ollama
 # Called by: ansible/playbooks/setup-ollama.yaml
-# Description: Handlers for the ollama role. Restarts the ollama launchd daemon when the plist changes.
-
+#            ansible/playbooks/setup-gpu-node.yaml
+# Description: Handlers for the ollama role. Restarts ollama on config changes.
 - name: restart ollama
   become: true
   command: launchctl kickstart -k system/com.ollama.ollama
+  when: ansible_system == 'Darwin'
+
+- name: restart ollama linux
+  ansible.builtin.systemd:
+    name: ollama
+    state: restarted
+    daemon_reload: true
+  become: true
+  when: ansible_system == 'Linux'

ansible/roles/ollama/tasks/main.yaml

@@ -1,12 +1,16 @@
 ---
 # Part of role: ollama
 # Called by: ansible/playbooks/setup-ollama.yaml
-# Description: Installs Ollama via Homebrew, deploys the launchd plist so it starts on boot bound to all interfaces, and pulls configured models.
+#            ansible/playbooks/setup-gpu-node.yaml
+# Description: Installs Ollama, configures it to bind to all interfaces, and pulls models.
+#              Supports macOS (Homebrew + launchd) and Linux (install script + systemd).
 
+# ── macOS ──────────────────────────────────────────────────────────────────────
 - name: Install ollama via Homebrew
   community.general.homebrew:
     name: ollama
     state: present
+  when: ansible_system == 'Darwin'
 
 - name: Deploy ollama launchd plist
   template:
@@ -17,6 +21,7 @@
     mode: "0644"
   become: true
   notify: restart ollama
+  when: ansible_system == 'Darwin'
 
 - name: Load ollama launchd service
   become: true
@@ -24,7 +29,36 @@
   args:
     creates: /var/run/ollama.pid
   ignore_errors: true
+  when: ansible_system == 'Darwin'
 
+# ── Linux ──────────────────────────────────────────────────────────────────────
+- name: Install ollama via install script
+  ansible.builtin.shell:
+    cmd: curl -fsSL https://ollama.com/install.sh | sh
+    creates: /usr/local/bin/ollama
+  when: ansible_system == 'Linux'
+
+- name: Deploy ollama systemd override
+  ansible.builtin.template:
+    src: ollama-override.conf.j2
+    dest: /etc/systemd/system/ollama.service.d/override.conf
+    owner: root
+    group: root
+    mode: "0644"
+  become: true
+  notify: restart ollama linux
+  when: ansible_system == 'Linux'
+
+- name: Enable and start ollama service
+  ansible.builtin.systemd:
+    name: ollama
+    state: started
+    enabled: true
+    daemon_reload: true
+  become: true
+  when: ansible_system == 'Linux'
+
+# ── shared ─────────────────────────────────────────────────────────────────────
 - name: Wait for ollama to be ready
   uri:
     url: "http://localhost:{{ ollama_port }}"
@@ -41,7 +75,9 @@
   register: ollama_tags
 
 - name: Pull ollama models
-  command: /opt/homebrew/bin/ollama pull {{ item }}
+  command: >
+    {{ '/opt/homebrew/bin/ollama' if ansible_system == 'Darwin' else '/usr/local/bin/ollama' }}
+    pull {{ item }}
   loop: "{{ ollama_models }}"
   when: item not in (ollama_tags.json.models | map(attribute='name') | list)
   environment:

ansible/roles/ollama/templates/ollama-override.conf.j2

@@ -0,0 +1,5 @@
+# Managed by Ansible — do not edit manually
+[Service]
+Environment="OLLAMA_HOST=0.0.0.0"
+Environment="OLLAMA_PORT={{ ollama_port }}"
+Environment="OLLAMA_MODELS={{ ollama_models_dir | default('/usr/share/ollama/.ollama/models') }}"