feat(pretix): add ansible role and playbook

roles/pretix/defaults/main/systemd.yml

@@ -0,0 +1,22 @@
+---
+pretix_systemd_unit_description: "pretix web service"
+pretix_systemd_unit_after: "network.target"
+pretix_systemd_unit_file_path: >-2
+  /etc/systemd/system/{{ pretix_systemd_service_name }}
+
+pretix_systemd_service_name: "pretix.service"
+pretix_systemd_service_user: "{{ pretix_user }}"
+pretix_systemd_service_group: "{{ pretix_user }}"
+pretix_systemd_service_environment:
+  VIRTUAL_ENV: "{{ pretix_virtualenv_dir }}"
+pretix_systemd_service_working_directory: "{{ pretix_install_dir }}"
+pretix_systemd_service_exec_start: >-2
+  {{ pretix_virtualenv_dir }}/bin/gunicorn pretix.wsgi
+  --name {{ pretix_config_wsgi_name }}
+  --workers {{ pretix_config_wsgi_workers }}
+  --max-requests {{ pretix_config_wsgi_max_requests }}
+  --log-level={{ pretix_config_wsgi_log_level }}
+  --bind={{ pretix_config_wsgi_bind_addr }}
+pretix_systemd_service_restart: "on-failure"
+
+pretix_systemd_install_wanted_by: "multi-user.target"