k8s-nodes initial work
Curtis Wilson
4 years ago
parent
710f09b904
commit
c17f4a7bda
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Dependencies
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----------------------------------------
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TODO REM add libvirt provider
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libvirt provider depends on mkisofs
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security_driver = none for ubuntu host, link github issue.
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https://github.com/dmacvicar/terraform-provider-libvirt/issues/546
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Other
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----------------------------------------
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Create a password hash.
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```shell
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python3 -c 'import crypt; print(crypt.crypt("test", crypt.mksalt(crypt.METHOD_SHA512)))'
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```
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#cloud-config
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# vim: syntax=yaml
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users:
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- name: admin
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# If we don't supress the user group then cloud init will fail because there
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# is allready an admin group in the ubuntu base image.
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no_user_group: true
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groups: users, admin, sudo
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shell: /usr/bin/bash
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sudo: ALL=(ALL) NOPASSWD:ALL
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ssh_authorized_keys:
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- ${admin-pub-key}
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- name: root
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ssh_authorized_keys:
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- ${admin-pub-key}
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ssh_pwauth: true
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disable_root: false
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chpasswd:
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list:
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- root:${admin-passwd}
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- admin:${admin-passwd}
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expire: false
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hostname: ${hostname}
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# Use this when it's determined that we need a bigger disk image.
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# This must be used in conjuction with 'size' in 'libvirt_volume'
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# growpart:
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# mode: auto
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# devices: ['/']
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# A CIDR block ending in '/32' equates to a single IP address, '0.0.0.0/0'
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# equates to any ip address.
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admin-ips = [ "8.8.8.8/32", "0.0.0.0/0" ]
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disk-image-dir = "/path/to/disk/pool/"
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libvirt-connection-url = "qemu+ssh://<user>@<host>/system"
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master-nodes = 1
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worker-nodes = 2
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node-memory = 2048
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node-vcpus = 2
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# 1 GiB, 1 vcpu, only one that is free.
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# This one won't work with k8s because it requires at least 2 vcpus.
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aws-ec2-instance-type = "t2.micro"
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# 4 GiB, 2 vcpus
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# aws-ec2-instnce-type = "t2.medium"
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# AWS Amazon Linux 2 AMI (HVM), SSD Volume Type - Oregon - 2021.11.11 - free
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# base-image = "ami-00be885d550dcee43"
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# AWS Amazon Linux 2 AMI (HVM), SSD Volume Type - us-east-2 - 2021.11.12 - free
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base-image = "ami-0dd0ccab7e2801812"
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# base-image = "https://cloud-images.ubuntu.com/releases/focal/release/ubuntu-20.04-server-cloudimg-amd64-disk-kvm.img"
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# From https://cloud.centos.org/centos/7/images/ from 2020-11-12 06:52
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# base-image = "https://cloud.centos.org/centos/7/images/CentOS-7-x86_64-GenericCloud-2009.qcow2"
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# Password hash created with:
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# python3 -c 'import crypt; print(crypt.crypt("linux", crypt.mksalt(crypt.METHOD_SHA512)))'
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# where "linux" is the password.
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root-admin-passwd = "$6$fiLRWvGQkdK.MnZA$Co9NkA5ruuBUA389JzmKJiC8gKRohmyM09AFnVBOD7ErZnxK4RHMUlKvYg1HSgwaCXTl7H/q1svoeQeUfgc6f0"
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root-admin-pub-key = "ssh-rsa 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 admin"
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#!/bin/sh
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# Use eval $(./get-vm-ips.sh) to set env vars for ips.
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terraform refresh > /dev/null
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IPS_JSON="$(terraform show -json | jq '.values.outputs')"
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echo $IPS_JSON | \
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jq '."master-ips".value[]' | \
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nl -v 0 | \
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awk '{print "export MASTER" $1 "=" $2}' | \
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sed 's/"//g'
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echo $IPS_JSON | \
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jq '."worker-ips".value[]' | \
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nl -v 0 | \
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awk '{print "export WORKER" $1 "=" $2}' | \
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sed 's/"//g'
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terraform {
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required_version = ">= 0.13"
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required_providers {
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libvirt = {
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source = "dmacvicar/libvirt"
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version = "0.6.11"
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}
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}
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}
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################################################################################
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# cloud-init
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################################################################################
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data "template_file" "master-node-user-datas" {
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template = file("${path.module}/cloud_init.cfg")
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vars = {
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admin-passwd = "${var.root-admin-passwd}"
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admin-pub-key = "${var.root-admin-pub-key}"
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hostname = "${var.vm-name-prefix}-master-${count.index}"
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}
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count = var.master-nodes
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}
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data "template_file" "worker-node-user-datas" {
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template = file("${path.module}/cloud_init.cfg")
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vars = {
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admin-passwd = "${var.root-admin-passwd}"
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admin-pub-key = "${var.root-admin-pub-key}"
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hostname = "${var.vm-name-prefix}-worker-${count.index}"
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}
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count = var.worker-nodes
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}
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################################################################################
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# aws
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# To use the aws module, uncomment the aws modules/resources and comment out the
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# libvirt modules/resources.
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################################################################################
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provider "aws" {
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region = "us-east-2"
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}
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module "aws-network" {
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source = "./modules/aws-network"
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name-prefix = var.vm-name-prefix
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vpc-cidr-block = var.aws-vpc-cidr-block
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subnet-cidr-block = var.aws-subnet-cidr-block
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admin-ips = var.admin-ips
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}
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# This key pair is not actually used. Keys are added to the nodes via cloud-init
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# instead. We just add this here that this key will show up in the AWS console."
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resource "aws_key_pair" "key" {
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key_name = "${var.vm-name-prefix}-key}"
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public_key = var.root-admin-pub-key
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tags = {
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Name = "${var.vm-name-prefix}-key"
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}
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}
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module "master-nodes" {
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source = "./modules/aws-nodes"
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ami = var.base-image
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ec2-instance-type = var.aws-ec2-instance-type
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subnet-id = module.aws-network.subnet.id
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security-group-ids = [module.aws-network.default-security-group.id]
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user-datas = data.template_file.master-node-user-datas
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num-nodes = var.master-nodes
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name-prefix = "${var.vm-name-prefix}-master"
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}
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module "worker-nodes" {
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source = "./modules/aws-nodes"
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ami = var.base-image
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ec2-instance-type = var.aws-ec2-instance-type
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subnet-id = module.aws-network.subnet.id
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security-group-ids = [module.aws-network.default-security-group.id]
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user-datas = data.template_file.worker-node-user-datas
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num-nodes = var.worker-nodes
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name-prefix = "${var.vm-name-prefix}-worker"
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}
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################################################################################
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# end aws
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################################################################################
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################################################################################
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# libvirt
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# To use the libvirt module, uncomment the libvirt modules/resources and comment
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# out the aws modules/resources.
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################################################################################
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# provider "libvirt" {
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# uri = var.libvirt-connection-url
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# }
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#
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# module "master-nodes" {
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# source = "./modules/libvirt-nodes"
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# pool-name = libvirt_pool.images.name
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# name-prefix = "${var.vm-name-prefix}-master"
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# num-nodes = var.master-nodes
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# node-memory = var.node-memory
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# node-vcpus = var.node-vcpus
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# base-image = var.base-image
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# root-admin-passwd = var.root-admin-passwd
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# root-admin-pub-key = var.root-admin-pub-key
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# libvirt-connection-url = var.libvirt-connection-url
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# user-datas = data.template_file.master-node-user-datas
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# }
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#
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# module "worker-nodes" {
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# source = "./modules/libvirt-nodes"
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# pool-name = libvirt_pool.images.name
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# name-prefix = "${var.vm-name-prefix}-worker"
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# num-nodes = var.worker-nodes
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# node-memory = var.node-memory
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# node-vcpus = var.node-vcpus
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# base-image = var.base-image
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# root-admin-passwd = var.root-admin-passwd
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# root-admin-pub-key = var.root-admin-pub-key
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# libvirt-connection-url = var.libvirt-connection-url
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# user-datas = data.template_file.worker-node-user-datas
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# }
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#
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# resource "libvirt_pool" "images" {
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# name = var.disk-image-pool-name
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# type = "dir"
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# path = var.disk-image-dir
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# }
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################################################################################
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# end libvirt
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################################################################################
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# TODO REM move to other file?
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output "master-ips" {
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value = module.master-nodes.ips
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}
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output "worker-ips" {
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value = module.worker-nodes.ips
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}
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resource "aws_vpc" "vpc" {
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cidr_block = var.vpc-cidr-block
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tags = {
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Name = "${var.name-prefix}-vpc"
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}
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}
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resource "aws_subnet" "subnet" {
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vpc_id = aws_vpc.vpc.id
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cidr_block = var.subnet-cidr-block
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# availability_zone = var.avail_zone
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tags = {
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Name = "${var.name-prefix}-subnet"
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}
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}
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resource "aws_default_security_group" "sg" {
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vpc_id = aws_vpc.vpc.id
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ingress {
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from_port = 22
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to_port = 22
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protocol = "tcp"
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cidr_blocks = var.admin-ips
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}
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egress {
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from_port = 0
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to_port = 0
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protocol = "-1"
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cidr_blocks = ["0.0.0.0/0"]
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prefix_list_ids = []
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}
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tags = {
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Name = "${var.name-prefix}-ssh-from-admins--sg"
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}
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}
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resource "aws_internet_gateway" "igw" {
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vpc_id = aws_vpc.vpc.id
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tags = {
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Name = "${var.name-prefix}-igw"
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}
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}
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resource "aws_default_route_table" "route-table" {
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default_route_table_id = aws_vpc.vpc.main_route_table_id
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route {
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cidr_block = "0.0.0.0/0"
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gateway_id = aws_internet_gateway.igw.id
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}
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# default route, mapping VPC CIDR block to "local", created implicitly and
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# cannot be specified.
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tags = {
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Name = "${var.name-prefix}-route-table"
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}
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}
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# Associate subnet with Route Table
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resource "aws_route_table_association" "a-rtb-subnet" {
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subnet_id = aws_subnet.subnet.id
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route_table_id = aws_default_route_table.route-table.id
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}
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output "vpc" {
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value = aws_vpc.vpc
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}
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output "subnet" {
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value = aws_subnet.subnet
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}
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output "default-security-group" {
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value = aws_default_security_group.sg
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}
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variable "admin-ips" {
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description = "A list of ips or cidr blocks that are allowed to connect to the nodes."
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type = list(string)
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}
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variable "name-prefix" {
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default = "tf"
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description = "This prefix will be used in all the names of the resources creates in our AWS network."
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type = string
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}
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variable "subnet-cidr-block" {
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default = "10.0.1.0/24"
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description = "The address space to be used for this subnet."
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type = string
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}
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variable "vpc-cidr-block" {
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default = "10.0.0.0/16"
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description = "The address space to be used for out networks VPC."
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type = string
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}
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resource "aws_instance" "nodes" {
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ami = var.ami
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instance_type = var.ec2-instance-type
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# key_name = aws_key_pair.debug1.key_name
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associate_public_ip_address = true
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subnet_id = var.subnet-id
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vpc_security_group_ids = var.security-group-ids
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user_data = element(var.user-datas.*.rendered, count.index)
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count = var.num-nodes
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tags = {
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Name = "${var.name-prefix}-${count.index}"
|
||||||
|
}
|
||||||
|
}
|
||||||
@ -0,0 +1,3 @@
|
|||||||
|
output "ips" {
|
||||||
|
value = aws_instance.nodes.*.public_ip
|
||||||
|
}
|
||||||
@ -0,0 +1,36 @@
|
|||||||
|
variable "ami" {
|
||||||
|
description = "The AWS AMI to be used for all the nodes"
|
||||||
|
type = string
|
||||||
|
}
|
||||||
|
|
||||||
|
variable "ec2-instance-type" {
|
||||||
|
default = "t2.micro"
|
||||||
|
description = "The AWS instance type to use for all nodes."
|
||||||
|
type = string
|
||||||
|
}
|
||||||
|
|
||||||
|
variable "name-prefix" {
|
||||||
|
default = "tf-node"
|
||||||
|
description = "This prefix will be applied to all names created by this module."
|
||||||
|
type = string
|
||||||
|
}
|
||||||
|
|
||||||
|
variable "num-nodes" {
|
||||||
|
default = 1
|
||||||
|
description = "The number of nodes to create from the given input parameters."
|
||||||
|
type = number
|
||||||
|
}
|
||||||
|
|
||||||
|
variable "user-datas" {
|
||||||
|
description = "A list of cloud-init configs that get applied to their corresponding node."
|
||||||
|
}
|
||||||
|
|
||||||
|
variable "subnet-id" {
|
||||||
|
description = "The ID of the subnet that all the nodes will be added to."
|
||||||
|
type = string
|
||||||
|
}
|
||||||
|
|
||||||
|
variable "security-group-ids" {
|
||||||
|
description = "A list of security group IDs to be applied to all the nodes."
|
||||||
|
type = list(string)
|
||||||
|
}
|
||||||
@ -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."
|
||||||
|
}
|
||||||
@ -0,0 +1,73 @@
|
|||||||
|
variable "admin-ips" {
|
||||||
|
description = "A list of ips or cidr blocks that are allowed to connect to the nodes."
|
||||||
|
type = list(string)
|
||||||
|
}
|
||||||
|
|
||||||
|
variable "aws-ec2-instance-type" {
|
||||||
|
default = "t2.micro"
|
||||||
|
description = "The AWS instance type to use for all nodes."
|
||||||
|
}
|
||||||
|
|
||||||
|
variable "aws-subnet-cidr-block" {
|
||||||
|
default = "10.0.1.0/24"
|
||||||
|
description = "The address space to be used for this subnet."
|
||||||
|
}
|
||||||
|
|
||||||
|
variable "aws-vpc-cidr-block" {
|
||||||
|
default = "10.0.0.0/16"
|
||||||
|
description = "The address space to be used for the VPC that all the AWS nodes will be in."
|
||||||
|
}
|
||||||
|
|
||||||
|
variable "disk-image-dir" {
|
||||||
|
description = "This is the location on the KVM hypervisor host where all the disk images will be kept."
|
||||||
|
}
|
||||||
|
|
||||||
|
variable "disk-image-pool-name" {
|
||||||
|
default = "k8s-tf-images"
|
||||||
|
description = "The name of the disk pool where all the images will be kept."
|
||||||
|
}
|
||||||
|
|
||||||
|
variable "libvirt-connection-url" {
|
||||||
|
description = "The libvirt connection URI, ie. qemu+ssh://<user>@<host>/system"
|
||||||
|
}
|
||||||
|
|
||||||
|
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 "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."
|
||||||
|
}
|
||||||
|
|
||||||
|
variable "master-nodes" {
|
||||||
|
default = 1
|
||||||
|
description = "The number of master nodes to create."
|
||||||
|
type = number
|
||||||
|
}
|
||||||
|
|
||||||
|
variable "worker-nodes" {
|
||||||
|
default = 2
|
||||||
|
description = "The number of worker nodes to create."
|
||||||
|
type = number
|
||||||
|
}
|
||||||
|
|
||||||
|
variable "base-image" {
|
||||||
|
default = "https://cloud-images.ubuntu.com/releases/focal/release/ubuntu-20.04-server-cloudimg-amd64-disk-kvm.img"
|
||||||
|
}
|
||||||
|
|
||||||
|
variable "vm-name-prefix" {
|
||||||
|
default = "k8s-tf"
|
||||||
|
description = "This prefix will appear before all VM names and hostnames, ie. k8s-tf-master-0."
|
||||||
|
}
|
||||||
Loading…
Reference in New Issue