Raspi Zero W Support

raspi0w.yaml

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+# See https://wiki.debian.org/RaspberryPi3 for known issues and more details.
+
+steps:
+  - mkimg: "{{ output }}"
+    size: 1500M
+
+  - mklabel: msdos
+    device: "{{ output }}"
+
+  - mkpart: primary
+    fs-type: 'fat32'
+    device: "{{ output }}"
+    start: 0%
+    end: 20%
+    tag: /boot
+
+  - mkpart: primary
+    device: "{{ output }}"
+    start: 20%
+    end: 100%
+    tag: /
+
+  - kpartx: "{{ output }}"
+
+  - mkfs: vfat
+    partition: /boot
+    label: RASPIFIRM
+
+  - mkfs: ext4
+    partition: /
+    label: RASPIROOT
+
+  - mount: /
+
+  - mount: /boot
+    mount-on: /
+    dirname: '/boot/firmware'
+
+  - unpack-rootfs: /
+
+  # We need to use Debian buster (currently testing) instead of Debian stretch
+  # (currently stable) for:
+  #
+  # linux ≥ 4.14
+  #   Which includes the sdhost driver for faster SD card access and making the
+  #   WiFi chip available, and has the WiFi driver enabled.
+  #
+  # raspi3-firmware ≥ 1.20171201-1
+  #   Which includes a recent enough firmware version to correctly pass the MAC
+  #   address to the kernel. This is a regression with Linux ≥ 4.12, see
+  #   https://github.com/raspberrypi/firmware/issues/846
+  #   Also, this package contains a Raspberry Pi 3-specific firmware file
+  #   required by the WiFi driver.
+  - qemu-debootstrap: sid
+    mirror: http://deb.debian.org/debian
+    target: /
+    arch: armel
+    components:
+    - main
+    - contrib
+    - non-free
+    unless: rootfs_unpacked
+
+  # TODO(https://bugs.debian.org/877855): remove this workaround once
+  # debootstrap is fixed
+  - chroot: /
+    shell: |
+      echo 'deb http://deb.debian.org/debian sid main contrib non-free' > /etc/apt/sources.list
+      apt-get update
+    unless: rootfs_unpacked
+
+  - apt: install
+    packages:
+    - ssh
+    - parted
+    - dosfstools
+    # Contains /lib/firmware/brcm/brcmfmac43430-sdio.bin (required for WiFi).
+    - firmware-brcm80211
+    - wireless-tools
+    - wpasupplicant
+    - raspi3-firmware
+    - linux-image-rpi
+    tag: /
+    unless: rootfs_unpacked
+
+  - cache-rootfs: /
+    unless: rootfs_unpacked
+
+  - shell: |
+      echo "rpi-z" > "${ROOT?}/etc/hostname"
+
+      # '..VyaTFxP8kT6' is crypt.crypt('raspberry', '..')
+      sed -i 's,root:[^:]*,root:..VyaTFxP8kT6,' "${ROOT?}/etc/shadow"
+
+      sed -i 's,#PermitRootLogin prohibit-password,PermitRootLogin yes,g' "${ROOT?}/etc/ssh/sshd_config"
+
+      install -m 644 -o root -g root fstab "${ROOT?}/etc/fstab"
+
+      install -m 644 -o root -g root eth0 "${ROOT?}/etc/network/interfaces.d/eth0"
+
+      mkdir -p "${ROOT?}/etc/iptables"
+      install -m 644 -o root -g root rules.v4 "${ROOT?}/etc/iptables/rules.v4"
+      install -m 644 -o root -g root rules.v6 "${ROOT?}/etc/iptables/rules.v6"
+
+      install -m 755 -o root -g root rpi3-resizerootfs "${ROOT?}/usr/sbin/rpi3-resizerootfs"
+      install -m 644 -o root -g root rpi3-resizerootfs.service "${ROOT?}/etc/systemd/system"
+      mkdir -p "${ROOT?}/etc/systemd/system/systemd-remount-fs.service.requires/"
+      ln -s /etc/systemd/system/rpi3-resizerootfs.service "${ROOT?}/etc/systemd/system/systemd-remount-fs.service.requires/rpi3-resizerootfs.service"
+
+      install -m 644 -o root -g root rpi3-generate-ssh-host-keys.service "${ROOT?}/etc/systemd/system"
+      mkdir -p "${ROOT?}/etc/systemd/system/multi-user.target.requires/"
+      ln -s /etc/systemd/system/rpi3-generate-ssh-host-keys.service "${ROOT?}/etc/systemd/system/multi-user.target.requires/rpi3-generate-ssh-host-keys.service"
+      rm -f ${ROOT?}/etc/ssh/ssh_host_*_key*
+
+      cp "${ROOT?}/usr/lib/linux-image-4.19.0.5-rpi/bcm2835-rpi-zero-w.dtb" "${ROOT?}/boot/"
+
+      cat >> "${ROOT?}/etc/motd" <<'EOT'
+
+      Please change the root password by running passwd
+      EOT
+    root-fs: /
+
+  # Clean up archive cache (likely not useful) and lists (likely outdated) to
+  # reduce image size by several hundred megabytes.
+  - chroot: /
+    shell: |
+      apt-get clean
+      rm -rf /var/lib/apt/lists
+
+  # Modify the kernel commandline we take from the firmware to boot from
+  # the partition labeled raspiroot instead of forcing it to mmcblk0p2
+  #
+  # Enable UART in the boot loader to debug
+  # 
+  # Tell start.elf that the kernel is upstream, so the BCM2835 dtb gets loaded
+  # From:
+  # https://www.raspberrypi.org/forums/viewtopic.php?p=1456353&sid=4fb9bf969c9ef5594f38e028b36e39c6#p1456353
+  #
+  - chroot: /
+    shell: |
+      ls -aR /boot
+      sed -i 's/.dev.mmcblk0p2/LABEL=RASPIROOT/' /boot/firmware/cmdline.txt
+      sed -i 's/BOOT_UART=0/BOOT_UART=1/' /boot/firmware/bootcode.bin
+      sed -i '/enable_uart=1/a upstream_kernel=1' /boot/firmware/config.txt
+
+  # TODO(https://github.com/larswirzenius/vmdb2/issues/24): remove once vmdb
+  # clears /etc/resolv.conf on its own.
+  - shell: |
+      rm "${ROOT?}/etc/resolv.conf"
+    root-fs: /