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t8s: True Kubernetes Simple Terraform Module

This repo contains Terraform modules to provision Kubernetes clusters on AWS using Container Linux by CoreOS (any channel).

Consider this project as beta quality. Configuration in this repository initially was based on awesome Tack Project, but eventually turned something different.

Target of the project

  • Supporting multiple clusters on a single VPC
  • Removing makefiles which are available on most projects
  • Easy configuration
  • Eliminate cfssl, ssl, bash scripts and other native binaries
  • Provide immutable architecture: Instead of upgrading cluster, create a new one.

Included Modules and Modules Layout

Project is including some other modules along with cluster.

  1. An optional ssh-key generating module. You can use your keys as well.
  2. An optional VPC creating module. It is called platform in our codes. This is not required but we are recommending to use it since it is ready.
  3. A cluster module which is responsible to create cluster.

Usage

Creating platform and cluster together.

provider "aws" {
  region = "${ var.aws["region"] }"
}


module "platform" {
  source = "github.com/startupheroes/t8s//platform?ref=v0.4.0"

  # variables
  aws             = "${var.aws}"
  cidr-vpc        = "${var.cidr["vpc"]}"
  name            = "${var.cluster["name"]}"
  ssh-public-file = "${file(var.keypair["public-file"])}"
}

module "cluster-v2" {
  source = "github.com/startupheroes/t8s//cluster?ref=v0.4.0"

  # variables
  aws                       = "${var.aws}"
  cidr                      = "${var.cidr}"
  capacity                  = "${var.capacity}"
  cluster                   = "${var.cluster}"
  instance-type             = "${var.instance-type}"
  root-cluster-tld         = "${var.tld["cluster-tld"]}"

  # modules
  depends-id         = "${module.platform.depends-id}"
  subnet-ids-private = "${module.platform.subnet-ids-private}"
  subnet-ids-public  = "${module.platform.subnet-ids-public}"
  vpc-id             = "${module.platform.vpc-id}"
}


# variables


variable "name" {
  default = "startupheroes"
}

variable "aws" {
  type = "map"

  default = {
    account-id = "9999999999999"
    azs        = "eu-west-1a,eu-west-1b"
    key-name   = "hero8s-test"
    region     = "eu-west-1"
  }
}

variable "capacity" {
  type = "map"

  default = {
    desired = 2
    max     = 5
    min     = 1
  }
}

variable "cidr" {
  type = "map"

  default = {
    vpc             = "192.168.0.0/16"
    allow-ssh       = "0.0.0.0/0"
    pods            = "10.2.0.0/16"
    service-cluster = "10.3.0.0/24"
  }
}

variable "instance-type" {
  type = "map"

  default = {
    bastion = "t2.nano"
    master  = "m3.large"
    node    = "c4.4xlarge"
  }
}

variable "keypair" {
  type = "map"

  default = {
    private-file = ".keypair/heroes"
    public-file  = ".keypair/heroes.pub"
  }
}

variable "tld" {
  type = "map"

  default = {
    external-tld = "cemokoc.com"
    cluster-tld = "internal.cemokoc.com"
  }
}

variable "cluster" {
  type = "map"

  default = {
    name    = "cemokoc"
    version = "2.0"
  }
}

output "platform" {
  value = "${ module.platform.platform }"
}

output "cluster-v2" {
  value = "${ module.cluster-v2.cluster}"
}