base_image: add missing become privileges for custom image tasks

Fix permission errors when using system libvirt by adding missing
become privileges to tasks that write to system directories:

- Fetch the custom image task
- Fetch the sha512sums file task
- Touch the custom image sentinel task
- Build the custom index task
- Generate the index repository task

These tasks failed with "Destination not writable" errors because
they were running as user but needed to write to root-owned directories
in /var/lib/libvirt/images/ when using system libvirt.

Generated-by: Claude AI
Signed-off-by: Daniel Gomez <[email protected]>

Author: dkruces

playbooks/roles/base_image/tasks/custom-image.yml

@@ -35,6 +35,8 @@
   register: custom_image_stat
 
 - name: Fetch the custom image
+  become: true
+  become_method: ansible.builtin.sudo
   ansible.builtin.get_url:
     url: "{{ guestfs_custom_raw_image_url }}"
     dest: "{{ custom_image_dir }}"
@@ -73,6 +75,8 @@
       register: sha512sums_stat
 
     - name: Fetch the sha512sums file
+      become: true
+      become_method: ansible.builtin.sudo
       ansible.builtin.get_url:
         url: "{{ guestfs_custom_raw_image_sha512sums_url }}"
         dest: "{{ custom_image_dir }}"
@@ -159,6 +163,8 @@
         - not sentinel_stat.stat.exists
 
     - name: Touch the custom image sentinel
+      become: true
+      become_method: ansible.builtin.sudo
       ansible.builtin.file:
         path: "{{ custom_image_ok }}"
         state: touch
@@ -190,6 +196,8 @@
   register: custom_index_stat
 
 - name: Build the custom index
+  become: true
+  become_method: ansible.builtin.sudo
   ansible.builtin.template:
     src: "{{ role_path }}/templates/custom-index.j2"
     dest: "{{ custom_index }}"
@@ -225,6 +233,8 @@
       Custom virt-builder image: {{ custom_image }}
 
 - name: Generating the index for {{ base_image_os_version }}
+  become: true
+  become_method: ansible.builtin.sudo
   ansible.builtin.command:
     argv:
       - "virt-builder-repository"