Fist attempt to factor microOS install

modules/host/main.tf

@@ -0,0 +1,71 @@
+resource "hcloud_server" "server" {
+  name = var.name
+
+  image              = "ubuntu-20.04"
+  rescue             = "linux64"
+  server_type        = var.server_type
+  location           = var.location
+  ssh_keys           = var.ssh_keys
+  firewall_ids       = var.firewall_ids
+  placement_group_id = var.placement_group_id
+
+
+  labels = var.labels
+
+  network {
+    network_id = var.network_id
+    ip         = var.ip
+  }
+
+  connection {
+    user           = "root"
+    private_key    = local.ssh_private_key
+    agent_identity = local.ssh_identity
+    host           = self.ipv4_address
+  }
+
+  provisioner "file" {
+    content = templatefile("${path.module}/templates/config.ign.tpl", {
+      name           = self.name
+      ssh_public_key = local.ssh_public_key
+    })
+    destination = "/root/config.ign"
+  }
+
+  # Combustion script file to install k3s-selinux
+  provisioner "file" {
+    content     = local.combustion_script
+    destination = "/root/script"
+  }
+
+  # Install MicroOS
+  provisioner "remote-exec" {
+    inline = local.microOS_install_commands
+  }
+
+  # Issue a reboot command
+  provisioner "local-exec" {
+    command = "ssh ${local.ssh_args} root@${self.ipv4_address} '(sleep 2; reboot)&'; sleep 3"
+  }
+
+  # Wait for MicroOS to reboot and be ready
+  provisioner "local-exec" {
+    command = <<-EOT
+      until ssh ${local.ssh_args} -o ConnectTimeout=2 root@${self.ipv4_address} true 2> /dev/null
+      do
+        echo "Waiting for MicroOS to reboot and become available..."
+        sleep 2
+      done
+    EOT
+  }
+
+  # Run the agent
+  provisioner "remote-exec" {
+    inline = [
+      # set the hostname in a persistent fashion
+      "hostnamectl set-hostname ${self.name}",
+      # Disable automatic reboot (after transactional updates), and configure the reboot method as kured
+      "rebootmgrctl set-strategy off && echo 'REBOOT_METHOD=kured' > /etc/transactional-update.conf"
+    ]
+  }
+}