infrastructure/roles/install_arch/tasks/main.yml

- name: Read /etc/motd
  command: cat /etc/motd
  register: motd_contents
  changed_when: motd_contents.stdout | length > 0

- name: Check whether we're running in Hetzner or Equinix Metal rescue environment
  fail: msg="Not running in rescue system!"
  when:
    - "'Hetzner Rescue' not in motd_contents.stdout"
    - "'Rescue environment based on Alpine Linux' not in motd_contents.stdout"
    - "'OS Rescue Environment' not in motd_contents.stdout"

# It sources some files which sets TMPDIR=/tmp/hwc which breaks mkinitcpio
- name: Remove problematic ~/.bashrc
  file: path=/root/.bashrc state=absent
  when: "'Hetzner Rescue' in motd_contents.stdout"

- name: Prepare Equinix Metal rescue system
  when: ansible_facts['os_family'] == "Alpine"
  block:
    - name: Make sure all required packages are installed in the rescue system
      apk: name=sgdisk,btrfs-progs,tar,gnupg update_cache=yes

    - name: Create the GnuPG home directory for the root user
      file: path=/root/.gnupg state=directory owner=root group=root mode=0700

    # Need to set no-use-tor otherwise dirmngr hangs at startup checking if
    # 127.0.0.1:9050 works and remains in SYN-SENT state for about a minute
    - name: Set the no-use-tor option in dirmngr.conf
      lineinfile: name=/root/.gnupg/dirmngr.conf create=yes line=no-use-tor owner=root group=root mode=0644

- name: Create partitions
  command: >
    sgdisk
      --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:
    - "{{ system_disks }}"
  register: sgdisk
  changed_when: "sgdisk.rc == 0"

- 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>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] }}{{ '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] }}{{ '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: 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: Touch LOCK file on mountpoint
  file: path=/mnt/LOCK state=touch owner=root group=root mode=0644

- name: Download bootstrap image
  get_url:
    url: "{{ item }}"
    dest: /tmp/
    mode: '0644'
  loop:
    - https://geo.mirror.pkgbuild.com/iso/{{ bootstrap_version }}/archlinux-bootstrap-x86_64.tar.zst
    - https://archlinux.org/iso/{{ bootstrap_version }}/archlinux-bootstrap-x86_64.tar.zst.sig

- name: Get pierre's key
  command: gpg --locate-keys pierre@archlinux.org
  changed_when: false

- name: Verify bootstrap image signature
  command: gpg --verify /tmp/archlinux-bootstrap-x86_64.tar.zst.sig
  changed_when: false

- name: Extract boostrap image  # noqa risky-file-permissions
  unarchive:
    src: /tmp/archlinux-bootstrap-x86_64.tar.zst
    dest: /tmp
    remote_src: true
    creates: /tmp/root.x86_64

- name: Copy resolv.conf to bootstrap chroot
  copy: remote_src=true src=/etc/resolv.conf dest=/tmp/root.x86_64/etc/resolv.conf owner=root group=root mode=0644

- name: Mount /proc to bootstrap chroot  # noqa command-instead-of-module
  command: mount --rbind /proc /tmp/root.x86_64/proc creates=/tmp/root.x86_64/proc/uptime

- name: Mount /sys to bootstrap chroot  # noqa command-instead-of-module
  command: mount --rbind /sys /tmp/root.x86_64/sys creates=/tmp/root.x86_64/sys/dev

- name: Mount /dev to bootstrap chroot  # noqa command-instead-of-module
  command: mount --rbind /dev /tmp/root.x86_64/dev creates=/tmp/root.x86_64/dev/zero

- name: Mount /mnt to bootstrap chroot  # noqa command-instead-of-module
  command: mount --rbind /mnt /tmp/root.x86_64/mnt creates=/tmp/root.x86_64/mnt/LOCK

- name: Configure pacman mirror
  template: src=mirrorlist.j2 dest=/tmp/root.x86_64/etc/pacman.d/mirrorlist owner=root group=root mode=0644

- name: Initialize pacman keyring inside bootstrap chroot
  command: chroot /tmp/root.x86_64 pacman-key --init
  register: chroot_pacman_key_init
  changed_when: "chroot_pacman_key_init.rc == 0"

- name: Populate pacman keyring inside bootstrap chroot
  command: chroot /tmp/root.x86_64 pacman-key --populate archlinux
  register: chroot_pacman_key_populate
  changed_when: "chroot_pacman_key_populate.rc == 0"

- name: Install ucode update
  when: ansible_virtualization_role == 'host'
  block:
    - name: Install ucode update for Intel
      set_fact: ucode="intel-ucode"
      when: "'GenuineIntel' in ansible_facts['processor']"

    - name: Install ucode update for AMD
      set_fact: ucode="amd-ucode"
      when: "'AuthenticAMD' in ansible_facts['processor']"

- name: Install arch base from bootstrap chroot
  command: chroot /tmp/root.x86_64 pacstrap /mnt base linux btrfs-progs grub openssh python-requests python-yaml inetutils {{ ucode | default('') }}
  args:
    creates: /tmp/root.x86_64/mnt/bin

- name: Mount /proc to new chroot  # noqa command-instead-of-module
  command: mount --rbind /proc /mnt/proc creates=/mnt/proc/uptime

- name: Mount /sys to new chroot  # noqa command-instead-of-module
  command: mount --rbind /sys /mnt/sys creates=/mnt/sys/dev

- name: Mount /dev to new chroot  # noqa command-instead-of-module
  command: mount --rbind /dev /mnt/dev creates=/mnt/dev/zero

- name: Run systemd-firstboot
  command: chroot /mnt systemd-firstboot --locale=C.UTF-8 --timezone=UTC --hostname={{ hostname }}
  register: chroot_systemd_firstboot
  changed_when: "chroot_systemd_firstboot.rc == 0"

- name: Run mkinitcpio
  command: chroot /mnt mkinitcpio -p linux
  register: chroot_mkinitcpio
  changed_when: "chroot_mkinitcpio.rc == 0"

- name: Configure networking
  include_role:
    name: networking
  vars:
    chroot_path: "/mnt"

- name: Provide default mount options (btrfs)
  lineinfile:
    path: /mnt/etc/default/grub
    owner: root
    group: root
    mode: '0644'
    regexp: "^GRUB_CMDLINE_LINUX_DEFAULT="
    line: "GRUB_CMDLINE_LINUX_DEFAULT=\"rootflags=compress-force=zstd\""
  when: filesystem == "btrfs"

- name: Install grub (legacy mode)
  command: chroot /mnt grub-install --target=i386-pc --recheck {{ item }}
  with_items:
    - "{{ system_disks }}"
  register: chroot_grub_install_legacy
  changed_when: "chroot_grub_install_legacy.rc == 0"

- name: Install grub (uefi mode)
  command: chroot /mnt grub-install --target=x86_64-efi --efi-directory=/efi --removable --recheck {{ item }}
  with_items:
    - "{{ 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
  register: chroot_grub_mkconfig
  changed_when: "chroot_grub_mkconfig.rc == 0"

- name: Setup pacman-init.service on first boot
  copy: src=pacman-init.service dest=/mnt/etc/systemd/system/ owner=root group=root mode=0644

- name: Setup ec2-public-keys on first boot
  copy: src={{ item.src }} dest=/mnt/{{ item.dest }} owner=root group=root mode={{ item.mode }}
  loop:
    - {src: ec2-public-keys, dest: /usr/local/bin/, mode: 755}
    - {src: ec2-public-keys.service, dest: /etc/systemd/system/, mode: 644}
  when: install_ec2_public_keys_service | default(false)

- name: Remove generated keyring in the installation process
  file: path=/mnt/etc/pacman.d/gnupg state=absent

- name: Make sure /etc/machine-id is absent
  file: path=/mnt/etc/machine-id state=absent

- name: Enable services inside chroot
  command: chroot /mnt systemctl enable sshd systemd-networkd systemd-resolved pacman-init {{ 'ec2-public-keys' if install_ec2_public_keys_service | default(false) }}
  register: chroot_systemd_services
  changed_when: "chroot_systemd_services.rc == 0"

- name: Add authorized key for root
  include_role:
    name: root_ssh
  vars:
    root_ssh_directory: /tmp/root.x86_64/mnt/root/.ssh
  when: not install_ec2_public_keys_service | default(false)

- name: Configure sshd via drop-in
  template: src=sshd_config.j2 dest=/mnt/etc/ssh/sshd_config.d/override.conf owner=root group=root mode=0644

- name: Clean pacman cache  # noqa risky-shell-pipe ("Illegal option -o pipefail" in Hetzner's recovery environment (dash?))
  shell: yes | chroot /mnt pacman -Scc
  register: chroot_pacman_clean_cache
  changed_when: "chroot_pacman_clean_cache.rc == 0"

- name: Remove LOCK file on mountpoint
  file: path=/mnt/LOCK state=absent