locals {
  first_control_plane_network_ip = cidrhost(hcloud_network_subnet.k3s.ip_range, 2)
  hcloud_image_name              = "ubuntu-20.04"
  ssh_public_key                 = trimspace(file(var.public_key))
  # ssh_private_key is either the contents of var.private_key or null to use a ssh agent.
  ssh_private_key = var.private_key == null ? null : trimspace(file(var.private_key))
  # ssh_identity is not set if the private key is passed directly, but if ssh agent is used, the public key tells ssh agent which private key to use.
  # For terraforms provisioner.connection.agent_identity, we need the public key as a string.
  ssh_identity = var.private_key == null ? local.ssh_public_key : null
  # ssh_identity_file is used for ssh "-i" flag, its the private key if that is set, or a public key file
  # if an ssh agent is used.
  ssh_identity_file = var.private_key == null ? var.public_key : var.private_key

  # shared flags for ssh to ignore host keys, to use root and our ssh identity file for all connections during provisioning.
  ssh_args = "-o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -i ${local.ssh_identity_file}"

  MicroOS_install_commands = [
    "set -ex",
    "apt-get install -y aria2",
    "aria2c --follow-metalink=mem https://raw.githubusercontent.com/kube-hetzner/kube-hetzner/master/.files/openSUSE-MicroOS.x86_64-k3s-kvm-and-xen.qcow2.meta4",
    "qemu-img convert -p -f qcow2 -O host_device $(ls -a | grep -ie '^opensuse.*microos.*k3s.*qcow2$') /dev/sda",
    "sgdisk -e /dev/sda",
    "parted -s /dev/sda resizepart 4 99%",
    "parted -s /dev/sda mkpart primary ext2 99% 100%",
    "partprobe /dev/sda && udevadm settle && fdisk -l /dev/sda",
    "mount /dev/sda4 /mnt/ && btrfs filesystem resize max /mnt && umount /mnt",
    "mke2fs -L ignition /dev/sda5",
    "mount /dev/sda5 /mnt",
    "mkdir /mnt/ignition",
    "cp /root/config.ign /mnt/ignition/config.ign",
    "umount /mnt"
  ]

  post_install_kustomization = templatefile(
    "${path.module}/templates/kustomization.yaml.tpl",
    {
      ccm_version   = var.hetzner_ccm_version != null ? var.hetzner_ccm_version : data.github_release.hetzner_ccm.release_tag
      ccm_latest    = var.hetzner_ccm_containers_latest
      csi_version   = var.hetzner_csi_version != null ? var.hetzner_csi_version : data.github_release.hetzner_csi.release_tag
      csi_latest    = var.hetzner_csi_containers_latest
      kured_version = data.github_release.kured.release_tag
  })

  traefik_config = templatefile(
    "${path.module}/templates/traefik_config.yaml.tpl",
    {
      lb_disable_ipv6    = var.lb_disable_ipv6
      lb_server_type     = var.lb_server_type
      location           = var.location
      traefik_acme_tls   = var.traefik_acme_tls
      traefik_acme_email = var.traefik_acme_email
  })
}