terraform-aws-ec2

This repository is a set of Terraform modules for building infrastructure with AWS EC2.

Quickstart

The easiest way to get the modules and running is by creating a Terraform definition for it, copy this snippet in a file named main.tf:

module "auto-scaling-group" {
  source = "git::https://github.com/tierratelematics/terraform-aws-ec2.git//modules/auto-scaling-group-alb?ref=0.4.0"

  project                     = "${var.project}"
  environment                 = "${terraform.env}"
  name                        = "backend"
  ami                         = "${data.aws_ami.version.id}"
  
  vpc_id                      = "${var.vpc_id}"
  vpc_availability_zones      = "${var.vpc_availability_zones}"
  vpc_subnets                 = "${var.vpc_subnets}"
  
  instance_type               = "${var.instance_type}"
  desired_capacity            = "${var.desired_capacity}"
  min_size                    = "${var.min_size}"
  max_size                    = "${var.max_size}"

  associate_public_ip_address = "${var.associate_public_ip_address}"

  alb_target_port             = "8080"
  alb_certificate_arn         = "${var.alb_certificate_arn}"
}

IAM Instance Profile

If you instance access AWS service you cou can specify an instance profile using the parameter iam_instance_profile.

module "auto-scaling-group" {
  source = "git::https://github.com/tierratelematics/terraform-aws-ec2.git//modules/auto-scaling-group-alb?ref=0.4.0"

  project                     = "${var.project}"
  environment                 = "${terraform.env}"
  ...

  iam_instance_profile        = "${aws_iam_instance_profile.backend-asg-profile.name}"
}

resource "aws_iam_instance_profile" "backend-asg-profile" {
  name = "${var.project}-${var.environment}-backend-asg-profile"
  role = "${module.asg-server-role.role_name}"
}

module "asg-server-role" {
  source = "git::https://github.com/tierratelematics/terraform-aws-iam.git///modules/iam/role"
  
  ...
}

If you need a Terraform module to build a IAM Role checkout https://github.com/tierratelematics/terraform-aws-iam.

User Data

You can also specify a custom user_data parameter, using the handy template_file data source.

module "auto-scaling-group" {
  source = "git::https://github.com/tierratelematics/terraform-aws-ec2.git//modules/auto-scaling-group-alb?ref=0.4.0"

  project                     = "${var.project}"
  environment                 = "${terraform.env}"
  ...

  user_data = "${data.template_file.user-data.rendered}"
}

data "template_file" "user-data" {
  template = "${file("services/backend/user-data.sh")}"

  vars {
    project     = "${var.project}"
    environment = "${var.environment}"

    ...

    redis_host = "${var.redis["host"]}"
    redis_port = "${var.redis["port"]}"
  }
}

Maintenance Ports

If you need to expose some ports to access maintenance services use the ec2_maintenance_ports parameter.

module "auto-scaling-group" {
  source = "git::https://github.com/tierratelematics/terraform-aws-ec2.git//modules/auto-scaling-group-alb?ref=0.4.0"

  project                     = "${var.project}"
  environment                 = "${terraform.env}"
  ...

  ec2_maintenance_ports       = [22, 2551, 8551]
}

License

Copyright 2017 Tierra SpA

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.