library/roles/piwik/tasks/main.yml: The archive cron job is installed conditionally.

infrastructure-services/roles/analytics: Run the log import job as piwik user.

piwik/defaults/main.yml

@@ -2,6 +2,8 @@
 piwik_repo_key: 'https://debian.piwik.org/repository.gpg'
 piwik_repo: 'deb https://debian.piwik.org/ piwik main'
 
+piwik_install_archive_cron: True
+
 piwik_under_nginx: True
 piwik_under_phpfpm: True
 piwik_user: piwik

piwik/tasks/main.yml

@@ -20,6 +20,7 @@
 
 - name: Install a cron job to archive the old logs data
   cron: minute="5" user={{ piwik_user }} name="Archive Piwik Log Data" job='[ -e /usr/share/piwik/console ] && [ -x /usr/bin/php ] && nice /usr/bin/php /usr/share/piwik/console core:archive --url="{{ piwik_url }}" >> /var/log/piwik/piwik-archive.log 2>&1' cron_file=piwik-archive
+  when: piwik_install_archive_cron
   tags: [ 'piwik', 'analytics' ]
   
 - name: Create a directory for the fcgi cache