kvm: add support for booting uefi instances

In order to boot UEFI instances successfully, the OVMF image
must be installed and located at the path that is hardcoded
inside Nova.

This patch takes care of installing the OVMF images and sets
up links to point towards the hardcoded path for operating
systems that don't install at the expected path.

Change-Id: I62f4aa26ffd0d2f3ba4aa19fbdb72578ef0223e4
Closes-Bug: #1825386
Closes-Bug: #1831279

tasks/drivers/kvm/nova_compute_kvm.yml

@@ -158,3 +158,28 @@
     - nova-kvm
     - nova-libvirt
     - nova-kvm-virsh-net
+
+# NOTE(mnaser): These 2 tasks should disappear once the following bug is fixed
+#               https://bugs.launchpad.net/nova/+bug/1825386
+- name: Create UEFI firmware folder
+  file:
+    path: /usr/share/OVMF
+    state: directory
+  when:
+    - ansible_os_family == 'Suse'
+  tags:
+    - nova-config
+    - nova-kvm
+    - nova-libvirt
+
+- name: Symlink UEFI firmware files
+  file:
+    src: "{{ (ansible_os_family == 'RedHat') | ternary('/usr/share/OVMF/OVMF_CODE.secboot.fd', '/usr/share/qemu/ovmf-x86_64-ms-code.bin') }}"
+    dest: /usr/share/OVMF/OVMF_CODE.fd
+    state: link
+  when:
+    - ansible_os_family in ['RedHat', 'Suse']
+  tags:
+    - nova-config
+    - nova-kvm
+    - nova-libvirt

vars/debian.yml

@@ -93,6 +93,7 @@ nova_compute_kvm_distro_packages:
   - qemu-utils
   - qemu-user
   - qemu-kvm
+  - ovmf
 
 nova_compute_kvm_packages_to_symlink:
   - python-libvirt

vars/redhat-7.yml

@@ -73,6 +73,7 @@ nova_compute_kvm_distro_packages:
   - python-libguestfs
   - qemu-img-ev
   - sysfsutils
+  - "{{ (ansible_architecture == 'aarch64') | ternary('AAVMF', 'OVMF') }}"
 
 nova_compute_kvm_packages_to_symlink:
   - libvirt-python

vars/suse.yml

@@ -79,6 +79,7 @@ nova_compute_kvm_distro_packages:
   - qemu-block-iscsi
   - qemu-block-rbd
   - qemu-block-ssh
+  - qemu-ovmf-x86_64
   - libvirt-python
   - nfs-utils
   - python-libguestfs