roles/single: skip cron-related tasks if cron is not installed

This is required to address: #52

Signed-off-by: Zakhar Bessarab <[email protected]>

roles/single/tasks/configure.yml

@@ -42,8 +42,14 @@
  name: victoriametrics
  enabled: true
 
+- name: Gather package facts
+ ansible.builtin.package_facts:
+ manager: auto
+
 - name: Configure credentials
- when: victoriametrics_backup_enabled | bool
+ when:
+ - victoriametrics_backup_enabled | bool
+ - "'cron' in ansible_facts.packages"
  block:
  - name: Create aws credentials dir
  become: true
@@ -97,4 +103,6 @@
  weekday: "{{ victoriametrics_backup_cron_weekday }}"
  month: "{{ victoriametrics_backup_cron_month }}"
  state: absent
- when: not victoriametrics_backup_enabled | bool
+ when:
+ - not victoriametrics_backup_enabled | bool
+ - "'cron' in ansible_facts.packages"