Redfish virtual media boot in UEFI

Change-Id: I2ed443bc4b74fa34b169f87f08b7f0a0b68144c0
Depends-On: https://review.opendev.org/760586

playbooks/roles/bifrost-ironic-install/tasks/create_esp.yml

@@ -0,0 +1,55 @@
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+---
+- name: "Create a temporary directory for mounting ESP"
+  tempfile:
+    state: directory
+  register: esp_temp_dir
+
+- name: "Create an empty ESP image"
+  command: dd if=/dev/zero of={{ esp_image }} bs=4096 count=1024
+
+- name: "Initialize ESP filesystem"
+  command: mkfs.fat -s 4 -r 512 -S 4096 {{ esp_image }}
+
+- name: "Mount ESP filesystem"
+  command: mount {{ esp_image }} {{ esp_temp_dir.path }}  # noqa 303
+
+- block:
+    - name: "Create ESP boot directory"
+      file:
+        path: "{{ esp_temp_dir.path }}/EFI/BOOT"
+        state: directory
+
+    - name: "Copy the shim image to ESP"
+      copy:
+        src: "{{ shim_efi_binary }}"
+        remote_src: true
+        dest: "{{ esp_temp_dir.path }}/EFI/BOOT/BOOTX64.efi"
+
+    - name: "Copy the grub2 image to ESP"
+      copy:
+        src: "{{ grub_efi_binary }}"
+        remote_src: true
+        dest: "{{ esp_temp_dir.path }}/EFI/BOOT/GRUBX64.efi"
+
+  always:
+    - name: "Unmount ESP filesystem"
+      command: umount {{ esp_temp_dir.path }}
+
+- name: "Ensure ESP image is readable"
+  file:
+    path: "{{ esp_image }}"
+    owner: ironic
+    group: ironic
+    mode: 0644