Upgrade ubuntu on Raspberry Pi 3. `terraform apply -target=null_resource.upgrade-packages`

raspi3-ubuntu-upgrade.tf

variable "server_ip" {
  default = "10.0.0.2"
}

# Terraform documentation
#  * Provisioner null_resource: https://www.terraform.io/docs/provisioners/null_resource.html
#  * Provisioner Connections: https://www.terraform.io/docs/provisioners/null_resource.html

# Ubuntu issues:
# https://bugs.launchpad.net/ubuntu/+source/linux-raspi2/+bug/1652270
# https://bugs.launchpad.net/ubuntu/+source/linux-raspi2/+bug/1652270/comments/44
# https://bugs.launchpad.net/ubuntu/+source/linux-firmware-raspi2/+bug/1691729
resource "null_resource" "upgrade-packages" {
  connection {
    type = "ssh"
    user = "ubuntu"
    host = "${var.server_ip}"
  }

  provisioner "remote-exec" {
    inline = [
      "sudo apt-mark hold linux-raspi2 linux-image-raspi2 linux-headers-raspi2",
      "sudo dpkg-divert --divert /lib/firmware/brcm/brcmfmac43430-sdio-2.bin --package linux-firmware-raspi2 --rename --add /lib/firmware/brcm/brcmfmac43430-sdio.bin",
      "sudo apt-get update && sudo apt-get upgrade -y && sudo apt-get dist-upgrade -y",
      "sudo apt-mark unhold linux-raspi2 linux-image-raspi2 linux-headers-raspi2",
      "sudo apt-get update && sudo apt-get upgrade -y && sudo apt-get dist-upgrade -y",
      "sudo sed 's/device_tree_address.*/device_tree_address=0x02008000/g; s/^.*device_tree_end.*//g;' -i /boot/firmware/config.txt",
      "sudo reboot"
    ]
  }
}