Build vhd images

These are used by rax classic.

Change-Id: Idc038c88db8e365c65cb6591b014942731580faa

playbooks/opendev-build-diskimage-base/pre.yaml

@@ -1,5 +1,48 @@
+# We have some out-of-tree of binary dependencies expressed below:
+#
+#  * vhd-util is required to create .vhd images, mostly used in
+#    Rackspace.  For full details see:
+#      https://docs.openstack.org/diskimage-builder/latest/developer/vhd_creation.html
+
 - hosts: all
   pre_tasks:
+    - name: Add PPA GPG key for custom vhd-util
+      become: true
+      apt_key:
+        data: |
+          -----BEGIN PGP PUBLIC KEY BLOCK-----
+
+          xsFNBFUZtK8BEADGaOXCZ/ypqcNEU5Y3rospyaJDhi9PiLndRXz6KxZEoDljmaLz
+          QBMiJ3/lnNflwcv07sBdQDqBjNClFdDbvP4ttIZsQzWYQya/uHzM3rNxbh2bw24T
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+          /ikMWcszaqYtctBVQvRxGfF2MSAy/VJny0OhiQI6XVc6eK/9Iu9ZeEAC6GoQRIla
+          rwYit+TGhqgYBKYTjWwVlKUZAz7GCIF+wx+NTkUTWVQTnDzTFeBVbzGx3WHQhCqF
+          NayXtKHrdImKfVpQjZZBVo42HzKqfGt/kNDM6IKhIuMlqlCUimVZpc3tawb+d8QT
+          TS0IjLrW7dpFfRaZRk82AjQOp96WJL9LoDvcEIfKg7RKmcGPBJ2qaquj+PA6yAZL
+          5pX70jigBqjtJ0PZGm7jELb8bB70SVSGsvwHmEz0pSs=
+          =d9cr
+          -----END PGP PUBLIC KEY BLOCK-----
+    - name: Add PPA for custom vhd-util
+      become: true
+      apt_repository:
+        repo: ppa:openstack-ci-core/vhd-util
+        codename: focal
     - name: Install custom element requirements
       become: true
       package:
@@ -10,6 +53,7 @@
           - python3-openstacksdk
           - python3-oslo.utils
           - zstd
+          - vhd-util
     - name: Setup dib directories
       become: true
       shell: |

zuul.d/image-build-jobs.yaml

@@ -25,6 +25,7 @@
       build_diskimage_formats:
         - qcow2
         - raw
+        - vhd
       # /opt/dib_tmp is an ephemeral disk if present
       build_diskimage_image_root: "/opt/dib_tmp/dib-images"
       build_diskimage_elements: &base_elements