npalm / terraform-aws-ecs-instances

AWS Terraform module to create ECS cluster instances.

AWS Terraform module to create ECS cluster instances.

This modules creates EC2 instances for a ECS cluster using autoscaling groups. The following features are supported.

• Supports both Amazon linux and CoreOS.
• Instances logging streamed to AWS CloudWatch for Amazon Linux.
• ECS agent enabled for AWS CloudWatch.
• Option to override the provided user data.

Example usages:

locals {
  aws_region  = "eu-west-1"
  environment = "dev"
  key_name    = "dev-key"
}

provider "aws" {
  region  = "${local.aws_region}"
  version = "1.7.1"
}

module "vpc" {
  source  = "npalm/vpc/aws"
  version = "1.1.0"

  environment = "${local.environment}"
  aws_region  = "${local.aws_region}"

  create_private_hosted_zone = "false"

  availability_zones = {
    eu-west-1 = ["eu-west-1a", "eu-west-1b"]
  }
}

### Create a key pair
resource "aws_key_pair" "key" {
  key_name   = "${local.key_name}"
  public_key = "${file("id_rsa.pub")}"
}

resource "aws_ecs_cluster" "cluster" {
  name = "${local.environment}-ecs-cluster"
}

# AWS linux
module "ecs-instances-aws" {
  source  = "npalm/ecs-instances/aws"

  ecs_cluster_name = "${aws_ecs_cluster.cluster.name}"

  aws_region  = "${local.aws_region}"
  environment = "${local.environment}"
  key_name    = "${local.key_name}"

  vpc_id   = "${module.vpc.vpc_id}"
  vpc_cidr = "${module.vpc.vpc_cidr}"
  subnets  = "${module.vpc.private_subnets}"

}

# CoreOS
module "ecs-instances-aws" {
  source  = "npalm/ecs-instances/aws"

  ecs_cluster_name = "${aws_ecs_cluster.cluster.name}"

  aws_region  = "${local.aws_region}"
  environment = "${local.environment}"
  key_name    = "${local.key_name}"

  vpc_id   = "${module.vpc.vpc_id}"
  vpc_cidr = "${module.vpc.vpc_cidr}"
  subnets  = "${module.vpc.private_subnets}"

  os = "coreos"
}

Inputs

Name	Description	Type	Default	Required
asg_desired	Desired numbers of instances in the auto scaling group.	string	1	no
asg_max	Maximum numbers of instances in the auto scaling group.	string	2	no
asg_min	Minimum numbers of instances in the auto scaling group.	string	1	no
aws_region	The AWS region to be used.	string	-	yes
coreos_amis	A map of region to core os AMI. By default the latest available will be chosen.	map	<map>	no
create_ecs_service_role	If true creates a ECS service role.	string	true	no
ecs_cluster_name	Name of the ECS cluster.	string	-	yes
ecs_optimized_amis	A map of region to ecs optimized AMI. By default the latest available will be chosen.	map	<map>	no
environment	Logical name of the environment, will be used as prefix and in tags.	string	-	yes
instance_type	Default AWS instance type.	string	t2.small	no
key_name	Name of AWS key pair	string	-	yes
os	By default Amazon linux is used, other supported OS in CoreOS.	string	``	no
subnets	Subnets where the instances will be deployed to.	list	-	yes
user_data	Override the module embedded user data script.	string	``	no
vpc_cidr	CIDR for the VPC.	string	-	yes
vpc_id	ID of the VPC.	string	-	yes

Outputs

Name	Description
service_role_arn	ARN of IAM role for the ecs agent.