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k8s-terraform
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rebase with master

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new-vpc
Curtis Wilson 4 years ago
parent bb80e8f3da 17d70ea351
commit 937fdc812a
8 changed files with 133 additions and 210 deletions
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13
example.tfvars
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@ -1,4 +1,4 @@
vm-name-prefix = "docker-ansible-test"
vm-name-prefix = "ansible-test"
# A CIDR block ending in '/32' equates to a single IP address, '0.0.0.0/0'
# equates to any ip address.
@ -7,12 +7,13 @@ admin-ips = [ "8.8.8.8/32", "0.0.0.0/0" ]
disk-image-dir = "/path/to/disk/pool/"
libvirt-connection-url = "qemu+ssh://<user>@<host>/system"
master-nodes = 1
worker-nodes = 2
node-memory = 2048
node-vcpus = 2
################################################################################
# AWS EC2 instance types
################################################################################
# 1 GiB, 1 vcpu, only one that is free.
# This one won't work with k8s because it requires at least 2 vcpus.
aws-ec2-instance-type = "t2.micro"
@ -53,6 +54,10 @@ base-image = "ami-0dd0ccab7e2801812"
# From https://cloud.centos.org/centos/7/images/ from 2020-11-12 06:52
# base-image = "https://cloud.centos.org/centos/7/images/CentOS-7-x86_64-GenericCloud-2009.qcow2"
################################################################################
# Keys/Passwords
################################################################################
# Password hash created with:
# python3 -c 'import crypt; print(crypt.crypt("linux", crypt.mksalt(crypt.METHOD_SHA512)))'
# where "linux" is the password.

9
get-vm-ips.sh
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@ -22,7 +22,7 @@ IPS_JSON="$(
# An array of all node "types"
NODE_TYPE_ARRAY="$(
echo $IPS_JSON | \
jq '.key' | \
jq '.value.value | to_entries | .[] | .key' | \
sed 's/"//g' | \
sed -z 's/\n/ /g;s/ $/\n/g')"
@ -32,12 +32,12 @@ VM_IP_EXPORTS="$(
# Convert type, converts "master-ips" to "MASTER"
TYPE_UPPER="$(echo ${TYPE^^} | sed s/_.*$//g)"
echo "$OUTPUTS_JSON" | \
jq '.'"$TYPE"'.value[]' | \
echo "$IPS_JSON" | \
jq '.value.value.'"$TYPE"'[]' | \
# Add line numbers starting with 0.
nl -v 0 | \
# Print an export string with a type placeholder "__TYPE__".
awk '{print "export __TYPE__" $1 "=" $2}' | \
awk '{print "export __TYPE___" $1 "=" $2}' | \
sed s/__TYPE__/$TYPE_UPPER/g
done)"
@ -48,6 +48,7 @@ ANSIBLE_INV="$(
sed -z 's/\n/,/g;s/,$/\n/g')"
# Create an inventory file for ansible.
echo "# Wrote an Ansible inventory file at ./inventory"
echo "[k8s_nodes]" > inventory
echo $VM_IP_EXPORTS | \
sed 's/"//g' | \

235
main.tf
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@ -1,5 +1,5 @@
terraform {
required_version = ">= 0.13"
required_version = ">= 1.0.8"
required_providers {
libvirt = {
source = "dmacvicar/libvirt"
@ -8,78 +8,31 @@ terraform {
}
}
################################################################################
# cloud-init
################################################################################
# data "template_file" "master-node-user-datas" {
# template = file("${path.module}/cloud_init.cfg")
# vars = {
# admin-passwd = "${var.root-admin-passwd}"
# admin-pub-key = "${var.root-admin-pub-key}"
# hostname = "${var.vm-name-prefix}-master-${count.index}"
# }
# count = var.master-nodes
# }
#
# data "template_file" "worker-node-user-datas" {
# template = file("${path.module}/cloud_init.cfg")
# vars = {
# admin-passwd = "${var.root-admin-passwd}"
# admin-pub-key = "${var.root-admin-pub-key}"
# hostname = "${var.vm-name-prefix}-worker-${count.index}"
# }
# count = var.worker-nodes
# }
data "template_file" "amzn2-node-user-datas" {
template = file("${path.module}/cloud_init.cfg")
vars = {
admin-passwd = "${var.root-admin-passwd}"
admin-pub-key = "${var.root-admin-pub-key}"
hostname = "${var.vm-name-prefix}-amzn2-${count.index}"
locals {
nodes-config = {
"master" = {
base-image = var.amzn2-ami
num = 1
},
"worker" = {
base-image = var.amzn2-ami
num = 2
}
count = 1
}
data "template_file" "ubuntu-node-user-datas" {
template = file("${path.module}/cloud_init.cfg")
vars = {
admin-passwd = "${var.root-admin-passwd}"
admin-pub-key = "${var.root-admin-pub-key}"
hostname = "${var.vm-name-prefix}-ubuntu-${count.index}"
}
count = 1
}
data "template_file" "arch-node-user-datas" {
template = file("${path.module}/cloud_init.cfg")
vars = {
admin-passwd = "${var.root-admin-passwd}"
admin-pub-key = "${var.root-admin-pub-key}"
hostname = "${var.vm-name-prefix}-arch-${count.index}"
}
count = 1
}
data "template_file" "centos7-node-user-datas" {
template = file("${path.module}/cloud_init.cfg")
vars = {
admin-passwd = "${var.root-admin-passwd}"
admin-pub-key = "${var.root-admin-pub-key}"
hostname = "${var.vm-name-prefix}-centos7-${count.index}"
}
count = 1
}
################################################################################
# cloud-init
################################################################################
data "template_file" "centos8-node-user-datas" {
template = file("${path.module}/cloud_init.cfg")
vars = {
admin-passwd = "${var.root-admin-passwd}"
admin-pub-key = "${var.root-admin-pub-key}"
hostname = "${var.vm-name-prefix}-centos8-${count.index}"
}
count = 1
module "cloud-init-config" {
for_each = local.nodes-config
source = "./modules/cloud-init-config"
cloud-init-template = "${path.module}/cloud_init.cfg"
hostname-prefix = "${var.vm-name-prefix}-${each.key}"
num = each.value.num
root-admin-passwd = var.root-admin-passwd
root-admin-pub-key = var.root-admin-pub-key
}
################################################################################
@ -92,9 +45,14 @@ provider "aws" {
region = "us-east-2"
}
module "aws-amis" {
source = "./modules/aws-amis"
}
# This module will grab the latest ami for a variety of distros. Uncomment to
# get a list of the latest AMIs for our supported distros.
# module "aws-amis" {
# source = "./modules/aws-amis"
# }
# output "amis" {
# value = module.aws-amis.amis
# }
module "aws-network" {
source = "./modules/aws-network"
@ -114,87 +72,18 @@ resource "aws_key_pair" "key" {
}
}
module "amzn2-nodes" {
module "nodes" {
for_each = local.nodes-config
source = "./modules/aws-nodes"
ami = var.base-image
ami = each.value.base-image
ec2-instance-type = var.aws-ec2-instance-type
subnet-id = module.aws-network.subnet.id
security-group-ids = [module.aws-network.default-security-group.id]
user-datas = data.template_file.amzn2-node-user-datas
num-nodes = 1
name-prefix = "${var.vm-name-prefix}-amzn2"
user-datas = lookup(module.cloud-init-config, each.key, null).user-datas
num-nodes = each.value.num
name-prefix = "${var.vm-name-prefix}-${each.key}"
}
module "ubuntu-nodes" {
source = "./modules/aws-nodes"
ami = "ami-0629230e074c580f2"
ec2-instance-type = var.aws-ec2-instance-type
subnet-id = module.aws-network.subnet.id
security-group-ids = [module.aws-network.default-security-group.id]
user-datas = data.template_file.ubuntu-node-user-datas
num-nodes = 1
name-prefix = "${var.vm-name-prefix}-ubuntu"
}
module "arch-nodes" {
source = "./modules/aws-nodes"
ami = "ami-02653f06de985e3ba"
ec2-instance-type = var.aws-ec2-instance-type
subnet-id = module.aws-network.subnet.id
security-group-ids = [module.aws-network.default-security-group.id]
user-datas = data.template_file.ubuntu-node-user-datas
num-nodes = 1
name-prefix = "${var.vm-name-prefix}-arch"
}
module "centos7-nodes" {
source = "./modules/aws-nodes"
ami = "ami-00f8e2c955f7ffa9b"
ec2-instance-type = var.aws-ec2-instance-type
subnet-id = module.aws-network.subnet.id
security-group-ids = [module.aws-network.default-security-group.id]
user-datas = data.template_file.ubuntu-node-user-datas
num-nodes = 1
name-prefix = "${var.vm-name-prefix}-centos7"
}
module "centos8-nodes" {
source = "./modules/aws-nodes"
ami = "ami-057cacbfbbb471bb3"
ec2-instance-type = var.aws-ec2-instance-type
subnet-id = module.aws-network.subnet.id
security-group-ids = [module.aws-network.default-security-group.id]
user-datas = data.template_file.ubuntu-node-user-datas
num-nodes = 1
name-prefix = "${var.vm-name-prefix}-centos8"
}
output "amis" {
value = module.aws-amis.amis
}
# module "master-nodes" {
# source = "./modules/aws-nodes"
# ami = var.base-image
# ec2-instance-type = var.aws-ec2-instance-type
# subnet-id = module.aws-network.subnet.id
# security-group-ids = [module.aws-network.default-security-group.id]
# user-datas = data.template_file.master-node-user-datas
# num-nodes = var.master-nodes
# name-prefix = "${var.vm-name-prefix}-master"
# }
#
# module "worker-nodes" {
# source = "./modules/aws-nodes"
# ami = var.base-image
# ec2-instance-type = var.aws-ec2-instance-type
# subnet-id = module.aws-network.subnet.id
# security-group-ids = [module.aws-network.default-security-group.id]
# user-datas = data.template_file.worker-node-user-datas
# num-nodes = var.worker-nodes
# name-prefix = "${var.vm-name-prefix}-worker"
# }
################################################################################
# end aws
################################################################################
@ -209,32 +98,19 @@ output "amis" {
# uri = var.libvirt-connection-url
# }
#
# module "master-nodes" {
# module "nodes" {
# for_each = local.nodes-config
# source = "./modules/libvirt-nodes"
# pool-name = libvirt_pool.images.name
# name-prefix = "${var.vm-name-prefix}-master"
# num-nodes = var.master-nodes
# name-prefix = "${var.vm-name-prefix}-${each.key}"
# num-nodes = each.value.num
# node-memory = var.node-memory
# node-vcpus = var.node-vcpus
# base-image = var.base-image
# base-image = each.value.base-image
# root-admin-passwd = var.root-admin-passwd
# root-admin-pub-key = var.root-admin-pub-key
# libvirt-connection-url = var.libvirt-connection-url
# user-datas = data.template_file.master-node-user-datas
# }
#
# module "worker-nodes" {
# source = "./modules/libvirt-nodes"
# pool-name = libvirt_pool.images.name
# name-prefix = "${var.vm-name-prefix}-worker"
# num-nodes = var.worker-nodes
# node-memory = var.node-memory
# node-vcpus = var.node-vcpus
# base-image = var.base-image
# root-admin-passwd = var.root-admin-passwd
# root-admin-pub-key = var.root-admin-pub-key
# libvirt-connection-url = var.libvirt-connection-url
# user-datas = data.template_file.worker-node-user-datas
# user-datas = lookup(module.cloud-init-config, each.key, null).user-datas
# }
#
# resource "libvirt_pool" "images" {
@ -247,31 +123,6 @@ output "amis" {
# end libvirt
################################################################################
output "amzn2-ips" {
value = module.amzn2-nodes.ips
}
output "ubuntu-ips" {
value = module.ubuntu-nodes.ips
}
output "arch-ips" {
value = module.arch-nodes.ips
}
output "centos7-ips" {
value = module.centos7-nodes.ips
}
output "centos8-ips" {
value = module.centos8-nodes.ips
output "ips" {
value = { for type, node in module.nodes : type => node.ips }
}
# TODO REM move to other file?
# output "master-ips" {
# value = module.master-nodes.ips
# }
#
# output "worker-ips" {
# value = module.worker-nodes.ips
# }

9
modules/cloud-init-config/main.tf
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@ -0,0 +1,9 @@
data "template_file" "user-datas" {
template = file("${var.cloud-init-template}")
vars = {
admin-passwd = "${var.root-admin-passwd}"
admin-pub-key = "${var.root-admin-pub-key}"
hostname = "${var.hostname-prefix}-${count.index}"
}
count = var.num
}

3
modules/cloud-init-config/outputs.tf
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@ -0,0 +1,3 @@
output "user-datas" {
value = data.template_file.user-datas
}

22
modules/cloud-init-config/variables.tf
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@ -0,0 +1,22 @@
variable "cloud-init-template" {
default = "../../cloud_init.cfg"
description = "The path to the cloud-init config template."
type = string
}
variable "hostname-prefix" {
description = "This prefix wil be applied as a prefix for the hostnames."
}
variable "num" {
description = "The number of user-datas to create with these parameters."
}
variable "root-admin-passwd" {
description = "This value will be substituted for any occurence of 'admin-password' in the cloud-init config template."
}
variable "root-admin-pub-key" {
description = "This value will be substituted for any occurence of 'admin-pub-key' in the cloud-init config template."
}

4
modules/libvirt-nodes/main.tf
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@ -8,10 +8,6 @@ terraform {
}
}
provider "libvirt" {
uri = var.libvirt-connection-url
}
resource "libvirt_volume" "node-images" {
name = "${var.name-prefix}-${count.index}"
pool = var.pool-name

36
variables.tf
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@ -71,3 +71,39 @@ variable "vm-name-prefix" {
default = "k8s-tf"
description = "This prefix will appear before all VM names and hostnames, ie. k8s-tf-master-0."
}
################################################################################
# AWS AMI vars
# These variables are really mor like constants. Using variables improves
# readability. The defaults are manually updated. Use the aws-amis module to get
# the latest for each distro.
################################################################################
variable "amzn2-ami" {
default = "ami-0dd0ccab7e2801812"
description = "The AMI to use for Amazon Linux 2."
}
variable "ubuntu-ami" {
default = "ami-06c7d6c0987eaa46c"
description = "The AMI to use for Ubuntu."
}
variable "centos7-ami" {
default = "ami-00f8e2c955f7ffa9b"
description = "The AMI to use for CentOS 7."
}
variable "centos8-ami" {
default = "ami-057cacbfbbb471bb3"
description = "The AMI to use for CentOS 8."
}
variable "arch-ami" {
default = "ami-02653f06de985e3ba"
description = "The AMI to use for Arch Linux."
}
variable "rhel7-ami" {
default = "ami-0a509b3c2a4d05b3f"
description = "The AMI to use for RHEL 7."
}
variable "rhel8-ami" {
default = "ami-0d871ca8a77af2948"
description = "The AMI to use for RHEL 8."
}

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