feat: allow a portable LiteLLM Python runtime

roles/vhosts/litellm/defaults/main.yml

@@ -12,6 +12,8 @@ litellm_package_spec: >-
     if ansible_facts.distribution == 'Debian' and ansible_facts.distribution_major_version == '11'
     else 'litellm[proxy] @ git+' ~ litellm_source_repo ~ '@' ~ litellm_version
   }}
+litellm_python_executable: "{{ lookup('ansible.builtin.env', 'LITELLM_PYTHON_EXECUTABLE') | default('python3', true) }}"
+litellm_pip_executable: "{{ lookup('ansible.builtin.env', 'LITELLM_PIP_EXECUTABLE') | default('', true) }}"
 litellm_listen_host: 127.0.0.1
 litellm_listen_port: 4000
 litellm_config_dir: /etc/litellm

roles/vhosts/litellm/tasks/main.yml

@@ -90,13 +90,14 @@
       - "prisma"
       - "psycopg2-binary"
     extra_args: --break-system-packages
+    executable: "{{ litellm_pip_executable if litellm_pip_executable | length > 0 else omit }}"
     state: present
   become: true
   become_user: "{{ litellm_service_user }}"
 
 - name: Resolve LiteLLM Python site-packages path
   ansible.builtin.shell: |
-    python3 - <<'PY'
+    {{ litellm_python_executable | quote }} - <<'PY'
     import glob
     import os
     paths = glob.glob(os.path.expanduser("~/.local/lib/python*/site-packages/litellm/proxy"))