install_arch: skip UEFI partition on cloud servers

The need for UEFI booting originates from dedicated server and it does
not benefit cloud servers. It therefore makes sense to skip it on them.

roles/install_arch/tasks/main.yml

@@ -35,7 +35,9 @@
       --align-end
       --clear
       --new=0:0:+1M --change-name=0:'BIOS boot partition' --typecode=0:ef02
+      {% if ansible_virtualization_role == 'host' %}
       --new=0:0:+512M --change-name=0:'EFI system partition' --typecode=0:ef00
+      {% endif %}
       --new=0:0:0 --change-name=0:root --typecode=0:8304
       {{ item }}
   with_items:
@@ -43,26 +45,33 @@
   register: sgdisk
   changed_when: "sgdisk.rc == 0"
 
-- name: Format the EFI system partition  # noqa no-changed-when
-  command: mkfs.fat -F 32 -S 4096 -n ESP {{ system_disks[0] }}{{ 'p2' if 'nvme' in system_disks[0] else '2' }}
+- name: Store root partition number for later steps
+  set_fact:
+    root_partno: "{{ '3' if ansible_virtualization_role == 'host' else '2' }}"
 
 - name: Partition and format the disks (btrfs RAID)  # noqa no-changed-when
-  command: mkfs.btrfs -f -L root -d {{ raid_level | default('raid1') }} -m {{ raid_level | default('raid1') }} -O no-holes {{ system_disks | map('regex_replace', '^(.*)$', '\g<1>p3' if 'nvme' in system_disks[0] else '\g<1>3') | join(' ') }}
+  command: mkfs.btrfs -f -L root -d {{ raid_level | default('raid1') }} -m {{ raid_level | default('raid1') }} -O no-holes {{ system_disks | map('regex_replace', '^(.*)$', '\g<1>p' ~ root_partno if 'nvme' in system_disks[0] else '\g<1>' ~ root_partno) | join(' ') }}
   when: filesystem == "btrfs" and system_disks | length >= 2
 
 - name: Partition and format the disks (btrfs single)  # noqa no-changed-when
-  command: mkfs.btrfs -f -L root -d single -m single -O no-holes {{ system_disks[0] }}{{ 'p3' if 'nvme' in system_disks[0] else '3' }}
+  command: mkfs.btrfs -f -L root -d single -m single -O no-holes {{ system_disks[0] }}{{ 'p' if 'nvme' in system_disks[0] }}{{ root_partno }}
   when: filesystem == "btrfs" and system_disks | length == 1
 
 - name: Mount the filesystem (btrfs)
-  mount: src="{{ system_disks[0] }}{{ 'p3' if 'nvme' in system_disks[0] else '3' }}" path=/mnt state=mounted fstype=btrfs opts="compress-force=zstd,space_cache=v2"
+  mount: src="{{ system_disks[0] }}{{ 'p' if 'nvme' in system_disks[0] }}{{ root_partno }}" path=/mnt state=mounted fstype=btrfs opts="compress-force=zstd,space_cache=v2"
   when: filesystem == "btrfs"
 
-- name: Create the efi mountpoint
-  file: path=/mnt/efi state=directory mode='0755'
+- name: Format and mount the EFI system partition
+  when: ansible_virtualization_role == 'host'
+  block:
+    - name: Format the EFI system partition  # noqa no-changed-when
+      command: mkfs.fat -F 32 -S 4096 -n ESP {{ system_disks[0] }}{{ 'p2' if 'nvme' in system_disks[0] else '2' }}
+
+    - name: Create the efi mountpoint
+      file: path=/mnt/efi state=directory mode='0755'
 
-- name: Mount the efi filesystem
-  mount: src="{{ system_disks[0] }}{{ 'p2' if 'nvme' in system_disks[0] else '2' }}" path=/mnt/efi state=mounted fstype=vfat
+    - name: Mount the efi filesystem
+      mount: src="{{ system_disks[0] }}{{ 'p2' if 'nvme' in system_disks[0] else '2' }}" path=/mnt/efi state=mounted fstype=vfat
 
 - name: Touch LOCK file on mountpoint
   file: path=/mnt/LOCK state=touch owner=root group=root mode=0644
@@ -120,7 +129,7 @@
   changed_when: "chroot_pacman_key_populate.rc == 0"
 
 - name: Install ucode update
-  when: ansible_virtualization_role == "host"
+  when: ansible_virtualization_role == 'host'
   block:
     - name: Install ucode update for Intel
       set_fact: ucode="intel-ucode"
@@ -183,6 +192,7 @@
     - "{{ system_disks }}"
   register: chroot_grub_install_uefi
   changed_when: "chroot_grub_install_uefi.rc == 0"
+  when: ansible_virtualization_role == 'host'
 
 - name: Configure grub
   command: chroot /mnt grub-mkconfig -o /boot/grub/grub.cfg