Add timezone setting support.

inventory/group_vars/all.yml

@@ -1,6 +1,11 @@
 ---
 k3s_version: v1.17.5+k3s1
-ansible_user: debian
+ansible_user: pi
 systemd_dir: /etc/systemd/system
 master_ip: "{{ hostvars[groups['master'][0]]['ansible_host'] | default(groups['master'][0]) }}"
 extra_server_args: ""
+
+# Uncomment (and modify if necessary) the following to set the time zone set for
+# all members of the cluster.
+timezone: US/Pacific
+

roles/prereq/handlers/main.yml

@@ -0,0 +1,4 @@
+- name: restart cron
+  service:
+    name: cron
+    state: restarted

roles/prereq/tasks/main.yml

@@ -50,3 +50,9 @@
     path: /etc/sudoers
     validate: 'visudo -cf %s'
   when: ansible_distribution in ['CentOS', 'Red Hat Enterprise Linux']
+
+- name: "set timezone to {{ timezone }}"
+  timezone:
+    name: "{{ timezone }}"
+  notify: restart cron
+  when: timezone is defined