base functionality to create aws resources

contrib/terraform/aws/.gitignore

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+*.tfstate*
+inventory

contrib/terraform/aws/00-create-infrastructure.tf

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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)}"
+}

contrib/terraform/aws/01-create-inventory.tf

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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"
+  }
+}

contrib/terraform/aws/README.md

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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.

contrib/terraform/aws/terraform.tfvars

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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"