k8s-nodes initial work

2021-11-15 14:01:22 -05:00
parent e613c60711
commit 19f5765a1e
16 changed files with 601 additions and 0 deletions
@@ -0,0 +1,74 @@
+terraform {
+  required_version = ">= 0.13"
+  required_providers {
+    libvirt = {
+      source = "dmacvicar/libvirt"
+      version = "0.6.11"
+    }
+  }
+}
+
+provider "libvirt" {
+  uri = var.libvirt-connection-url
+}
+
+resource "libvirt_volume" "node-images" {
+  name   = "${var.name-prefix}-${count.index}"
+  pool   = var.pool-name
+  source = var.base-image
+  count  = var.num-nodes
+  format = "qcow2"
+}
+
+data "template_file" "network-config" {
+  template = file("${path.module}/network_config.cfg")
+}
+
+resource "libvirt_cloudinit_disk" "node-inits" {
+  name           = "${var.name-prefix}-${count.index}-init"
+  user_data      = element(var.user-datas.*.rendered, count.index)
+  network_config = data.template_file.network-config.rendered
+  pool           = var.pool-name
+  count          = var.num-nodes
+}
+
+resource "libvirt_domain" "nodes" {
+  count  = var.num-nodes
+  name   = "${var.name-prefix}-${count.index}"
+  memory = var.node-memory
+  vcpu   = var.node-vcpus
+
+  cloudinit = element(libvirt_cloudinit_disk.node-inits.*.id, count.index)
+
+  network_interface {
+    network_name   = "default"
+    hostname       = "${var.name-prefix}-${count.index}"
+    wait_for_lease = true
+  }
+
+  # IMPORTANT: this is a known bug on cloud images, since they expect a console
+  # we need to pass it
+  # https://bugs.launchpad.net/cloud-images/+bug/1573095
+  console {
+    type        = "pty"
+    target_port = "0"
+    target_type = "serial"
+  }
+
+  console {
+    type        = "pty"
+    target_type = "virtio"
+    target_port = "1"
+  }
+
+  disk {
+    volume_id = element(libvirt_volume.node-images.*.id, count.index)
+  }
+
+  graphics {
+    type        = "spice"
+    listen_type = "address"
+    autoport    = true
+  }
+}
+
@@ -0,0 +1,4 @@
+version: 2
+ethernets:
+  ens3:
+    dhcp4: true
@@ -0,0 +1,4 @@
+
+output "ips" {
+  value = libvirt_domain.nodes.*.network_interface.0.addresses.0
+}
@@ -0,0 +1,46 @@
+variable "base-image" {
+  default = "https://cloud-images.ubuntu.com/releases/focal/release/ubuntu-20.04-server-cloudimg-amd64-disk-kvm.img"
+  description = "The base image to be used for all nodes."
+}
+
+variable "libvirt-connection-url" {
+  description = "The libvirt connection URI, ie. qemu+ssh://<user>@<host>/system"
+}
+
+variable "name-prefix" {
+  default = "k8s-node"
+  description = "This will be a prefix for all resource names, ie. domains will be created suck as \"k8s-node-2\"."
+}
+
+variable "node-memory" {
+  default     = "2048"
+  description = "The amount of memory to be used for all the nodes."
+  type        = number
+}
+
+variable "node-vcpus" {
+  default     = "2"
+  description = "The amount of vcpus to be used for all the nodes."
+  type        = number
+}
+
+variable "user-datas" {
+  description = "A list of cloud-init configs that get applied to their corresponding node."
+}
+
+variable "num-nodes" {
+  description = "The number of nodes to create with this config."
+}
+
+variable "pool-name" {
+  default = "default"
+  description = "The name of the pool to put all disk images in."
+}
+
+variable "root-admin-passwd" {
+  description = "This will be the password for the root and admin user. The format of this can by any format accepted by cloud-init's chpasswd module."
+}
+
+variable "root-admin-pub-key" {
+  description = "The public key to be added to authorized_keys for the root and admin accounts."
+}