Specify changed_when for shell commands

roles/virtualization/tasks/libvirt.yml

@@ -9,6 +9,8 @@
   when: not vm_disk_stat.stat.exists
   delegate_to: localhost
   ansible.builtin.command: qemu-img create -f qcow2 {{ vm_path | default('/var/lib/libvirt/images/') }}{{ hostname }}.qcow2 {{ vm_size }}G
+  changed_when: result.rc == 0
+  register: result
 
 - name: Generate Random MAC Address
   delegate_to: localhost
@@ -32,6 +34,8 @@
     {{ vm_path | default('/var/lib/libvirt/images/') }}
     {{ hostname }}-cloudinit.iso /tmp/cloud-user-data-{{ hostname }}.yml
     -N /tmp/cloud-network-config-{{ hostname }}.yml
+  changed_when: result.rc == 0
+  register: result
 
 - name: Create VM using libvirt
   delegate_to: localhost