alpine: enable automatic upgrades only for virtual machines

And factor out VM stuff into a separate file.

roles/alpine/tasks/vm.yml

@@ -0,0 +1,25 @@
+- name: Install QEMU guest agent package
+  package:
+    name: qemu-guest-agent
+
+- name: Enable QEMU guest agent service
+  service:
+    name: qemu-guest-agent
+    enabled: yes
+    state: started
+
+- name: Install logrotate
+  package:
+    name: logrotate
+
+- name: Install automatic upgrade script
+  copy:
+    dest: /etc/periodic/weekly/
+    src: unattended-upgrade
+    mode: "0755"
+
+- name: Configure log rotation for automatic upgrades
+  copy:
+    dest: /etc/logrotate.d/unattended-upgrade
+    src: unattended-upgrade.logrotate
+    mode: "0644"