Fist attempt to factor microOS install

modules/host/locals.tf

@@ -0,0 +1,43 @@
+locals {
+  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 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 update",
+    "apt-get install -y aria2",
+    "aria2c --follow-metalink=mem https://download.opensuse.org/tumbleweed/appliances/openSUSE-MicroOS.x86_64-kvm-and-xen.qcow2.meta4",
+    "qemu-img convert -p -f qcow2 -O host_device $(ls -a | grep -ie '^opensuse.*microos.*qcow2$') /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",
+    "mkdir /mnt/combustion",
+    "cp /root/script /mnt/combustion/script",
+    "umount /mnt"
+  ]
+
+  combustion_script = <<EOF
+#!/bin/bash
+# combustion: network
+rpm --import https://rpm.rancher.io/public.key
+zypper refresh
+zypper --gpg-auto-import-keys install -y https://rpm.rancher.io/k3s/stable/common/microos/noarch/k3s-selinux-0.4-1.sle.noarch.rpm
+udevadm settle
+EOF
+
+}