ara_api: Add conjobs

Create cron tasks to clean up old stuff from ARA, disabled by default but can be enabled if desired

Change-Id: I8d54a2649bb7b82298d73b5d9b89a857807f6d1e

roles/ara_api/defaults/main.yaml

@@ -204,3 +204,16 @@ ara_api_database_conn_max_age: 0
 # timezone but Ansible doesn't provide, for example, an ansible_timezone fact
 # that we could use here. With that in mind, UTC is the best default for now.
 ara_api_time_zone: UTC
+
+# ARA cleanup settings
+# The following settings configure daily maintenance cronjobs
+ara_api_configure_cron: false
+
+# When configuring cronjobs, only provide the arguments for the ara CLI utility
+ara_api_cleanup_crons:
+  - name: ara_api expire running playbooks
+    arguments: 'expire --server http://localhost:8000 --client http --confirm --hours 24'
+    special_time: 'daily' # you can also use other time arguments from the cron module
+  - name: ara_api prune old reports
+    arguments: 'playbook prune --server http://localhost:8000 --client http --confirm --days 30'
+    special_time: 'daily'

roles/ara_api/tasks/config.yaml

@@ -110,3 +110,18 @@
   notify:
     - restart ara-api
   no_log: "{{ ara_api_secure_logging }}"
+
+- name: Set up ARA API cronjobs
+  cron:
+    name: "{{ job['name'] }}"
+    special_time: "{{ job['special_time'] | default(omit) }}"
+    minute: "{{ job['minute'] | default(omit) }}"
+    hour: "{{ job['hour'] | default(omit) }}"
+    day: "{{ job['day'] | default(omit) }}"
+    weekday: "{{ job['weekday'] | default(omit) }}"
+    month: "{{ job['month'] | default(omit) }}"
+    job: "{{ ara_api_venv_path }}/bin/ara {{ job['arguments'] }} >/dev/null 2>&1"
+  loop: "{{ ara_api_cleanup_crons }}"
+  loop_control:
+    loop_var: 'job'
+  when: ara_api_configure_cron