Merge pull request #289 from rsmitty/issue-279

base functionality to create aws resources
This commit is contained in:
Smaine Kahlouch 2016-06-09 13:57:04 +02:00
commit c1ebd84bf0
5 changed files with 232 additions and 0 deletions

2
contrib/terraform/aws/.gitignore vendored Normal file
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*.tfstate*
inventory

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variable "deploymentName" {
type = "string"
description = "The desired name of your deployment."
}
variable "numControllers"{
type = "string"
description = "Desired # of controllers."
}
variable "numEtcd" {
type = "string"
description = "Desired # of etcd nodes. Should be an odd number."
}
variable "numNodes" {
type = "string"
description = "Desired # of nodes."
}
variable "volSizeController" {
type = "string"
description = "Volume size for the controllers (GB)."
}
variable "volSizeEtcd" {
type = "string"
description = "Volume size for etcd (GB)."
}
variable "volSizeNodes" {
type = "string"
description = "Volume size for nodes (GB)."
}
variable "subnet" {
type = "string"
description = "The subnet in which to put your cluster."
}
variable "securityGroups" {
type = "string"
description = "The sec. groups in which to put your cluster."
}
variable "ami"{
type = "string"
description = "AMI to use for all VMs in cluster."
}
variable "SSHKey" {
type = "string"
description = "SSH key to use for VMs."
}
variable "master_instance_type" {
type = "string"
description = "Size of VM to use for masters."
}
variable "etcd_instance_type" {
type = "string"
description = "Size of VM to use for etcd."
}
variable "node_instance_type" {
type = "string"
description = "Size of VM to use for nodes."
}
variable "terminate_protect" {
type = "string"
default = "false"
}
variable "awsRegion" {
type = "string"
}
provider "aws" {
region = "${var.awsRegion}"
}
resource "aws_instance" "master" {
count = "${var.numControllers}"
ami = "${var.ami}"
instance_type = "${var.master_instance_type}"
subnet_id = "${var.subnet}"
vpc_security_group_ids = ["${var.securityGroups}"]
key_name = "${var.SSHKey}"
disable_api_termination = "${var.terminate_protect}"
root_block_device {
volume_size = "${var.volSizeController}"
}
tags {
Name = "${var.deploymentName}-master-${count.index + 1}"
}
}
resource "aws_instance" "etcd" {
count = "${var.numEtcd}"
ami = "${var.ami}"
instance_type = "${var.etcd_instance_type}"
subnet_id = "${var.subnet}"
vpc_security_group_ids = ["${var.securityGroups}"]
key_name = "${var.SSHKey}"
disable_api_termination = "${var.terminate_protect}"
root_block_device {
volume_size = "${var.volSizeEtcd}"
}
tags {
Name = "${var.deploymentName}-etcd-${count.index + 1}"
}
}
resource "aws_instance" "minion" {
count = "${var.numNodes}"
ami = "${var.ami}"
instance_type = "${var.node_instance_type}"
subnet_id = "${var.subnet}"
vpc_security_group_ids = ["${var.securityGroups}"]
key_name = "${var.SSHKey}"
disable_api_termination = "${var.terminate_protect}"
root_block_device {
volume_size = "${var.volSizeNodes}"
}
tags {
Name = "${var.deploymentName}-minion-${count.index + 1}"
}
}
output "master-ip" {
value = "${join(", ", aws_instance.master.*.private_ip)}"
}
output "etcd-ip" {
value = "${join(", ", aws_instance.etcd.*.private_ip)}"
}
output "minion-ip" {
value = "${join(", ", aws_instance.minion.*.private_ip)}"
}

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variable "SSHUser" {
type = "string"
description = "SSH User for VMs."
}
resource "null_resource" "ansible-provision" {
depends_on = ["aws_instance.master","aws_instance.etcd","aws_instance.minion"]
##Create Master Inventory
provisioner "local-exec" {
command = "echo \"[kube-master]\" > inventory"
}
provisioner "local-exec" {
command = "echo \"${join("\n",formatlist("%s ansible_ssh_user=%s", aws_instance.master.*.private_ip, var.SSHUser))}\" >> inventory"
}
##Create ETCD Inventory
provisioner "local-exec" {
command = "echo \"\n[etcd]\" >> inventory"
}
provisioner "local-exec" {
command = "echo \"${join("\n",formatlist("%s ansible_ssh_user=%s", aws_instance.etcd.*.private_ip, var.SSHUser))}\" >> inventory"
}
##Create Nodes Inventory
provisioner "local-exec" {
command = "echo \"\n[kube-node]\" >> inventory"
}
provisioner "local-exec" {
command = "echo \"${join("\n",formatlist("%s ansible_ssh_user=%s", aws_instance.minion.*.private_ip, var.SSHUser))}\" >> inventory"
}
provisioner "local-exec" {
command = "echo \"\n[k8s-cluster:children]\nkube-node\nkube-master\netcd\" >> inventory"
}
}

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## Kubernetes on AWS with Terraform
**Overview:**
- This will create nodes in a VPC inside of AWS
- A dynamic number of masters, etcd, and nodes can be created
- These scripts currently expect Private IP connectivity with the nodes that are created. This means that you may need a tunnel to your VPC or to run these scripts from a VM inside the VPC. Will be looking into how to work around this later.
**How to Use:**
- Export the variables for your Amazon credentials:
```
export AWS_ACCESS_KEY_ID="xxx"
export AWS_SECRET_ACCESS_KEY="yyy"
```
- Update contrib/terraform/aws/terraform.tfvars with your data
- Run with `terraform apply`
- Once the infrastructure is created, you can run the kubespray playbooks and supply contrib/terraform/aws/inventory with the `-i` flag.
**Future Work:**
- Update the inventory creation file to be something a little more reasonable. It's just a local-exec from Terraform now, using terraform.py or something may make sense in the future.

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deploymentName="test-kube-deploy"
numControllers="2"
numEtcd="3"
numNodes="2"
volSizeController="20"
volSizeEtcd="20"
volSizeNodes="20"
awsRegion="us-west-2"
subnet="subnet-xxxxx"
ami="ami-32a85152"
securityGroups="sg-xxxxx"
SSHUser="core"
SSHKey="my-key"
master_instance_type="m3.xlarge"
etcd_instance_type="m3.xlarge"
node_instance_type="m3.xlarge"
terminate_protect="false"