add nightly_update role

tasks/main.yml

@@ -6,6 +6,10 @@
   import_tasks: update.yml
   tags: update
 
+- name: schedule package update and restart for the night
+  import_tasks: nightly_update.yml
+  tags: nightly_update
+
 - name: restart server if required
   import_tasks: restart.yml
   tags: restart

tasks/nightly_update.yml

@@ -0,0 +1,36 @@
+- name: Create update Script
+  copy:
+    dest: /usr/local/bin/nightly-update.sh
+    content: |
+      #!/bin/bash
+      {
+      echo "Starting update at $(date)"
+      apt-get update -q
+      apt-get -y -o Dpkg::Options::=--force-confdef -o Dpkg::Options::=--force-confold dist-upgrade --auto-remove
+      echo "Update completed at $(date)"
+      } >> "/var/log/nightly-update.log" 2>&1
+      shutdown -r now
+    mode: '0755'
+
+- name: Ensure at is installed
+  apt:
+    name: at
+    state: present
+
+- name: Ensure atd (at daemon) is running and enabled
+  service:
+    name: atd
+    state: started
+    enabled: true
+
+- name: Schedule nightly-update.sh to run between 5:00-6:59 AM once
+  shell: |
+    hour=$(shuf -i 5-6 -n 1)
+    minute=$(shuf -i 0-59 -n 1)
+    echo "/usr/local/bin/nightly-update.sh" | at "$hour:$minute"
+    echo "update and restart scheduled for $hour:$minute"
+  register: restard_scheduled
+
+- name: output "restart schedule"
+  debug:
+    var: restard_scheduled.stdout_lines

tasks/restart.yml

@@ -1,4 +1,4 @@
-- name: schedule restart randomly between 2-5 AM if necessary
+- name: schedule restart randomly between 5-7 AM if necessary
   shell: |
     hour=$(shuf -i 5-6 -n 1)
     minute=$(shuf -i 0-59 -n 1)