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bd5d38d Sep 7, 2017
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# Specify the provider and access details
provider "aws" {
region = "${var.aws_region}"
}
# Create a VPC to launch our instances into
resource "aws_vpc" "default" {
cidr_block = "10.0.0.0/16"
}
# Create an internet gateway to give our subnet access to the outside world
resource "aws_internet_gateway" "default" {
vpc_id = "${aws_vpc.default.id}"
}
# Grant the VPC internet access on its main route table
resource "aws_route" "internet_access" {
route_table_id = "${aws_vpc.default.main_route_table_id}"
destination_cidr_block = "0.0.0.0/0"
gateway_id = "${aws_internet_gateway.default.id}"
}
# Create a subnet to launch our instances into
resource "aws_subnet" "default" {
vpc_id = "${aws_vpc.default.id}"
cidr_block = "10.0.1.0/24"
map_public_ip_on_launch = true
}
# A security group for the ELB so it is accessible via the web
resource "aws_security_group" "elb" {
name = "terraform_example_elb"
description = "Used in the terraform"
vpc_id = "${aws_vpc.default.id}"
# HTTP access from anywhere
ingress {
from_port = 80
to_port = 80
protocol = "tcp"
cidr_blocks = ["0.0.0.0/0"]
}
# outbound internet access
egress {
from_port = 0
to_port = 0
protocol = "-1"
cidr_blocks = ["0.0.0.0/0"]
}
}
# Our default security group to access
# the instances over SSH and HTTP
resource "aws_security_group" "default" {
name = "terraform_example"
description = "Used in the terraform"
vpc_id = "${aws_vpc.default.id}"
# SSH access from anywhere
ingress {
from_port = 22
to_port = 22
protocol = "tcp"
cidr_blocks = ["0.0.0.0/0"]
}
# HTTP access from the VPC
ingress {
from_port = 80
to_port = 80
protocol = "tcp"
cidr_blocks = ["10.0.0.0/16"]
}
# outbound internet access
egress {
from_port = 0
to_port = 0
protocol = "-1"
cidr_blocks = ["0.0.0.0/0"]
}
}
resource "aws_elb" "web" {
name = "terraform-example-elb"
subnets = ["${aws_subnet.default.id}"]
security_groups = ["${aws_security_group.elb.id}"]
instances = ["${aws_instance.web.id}"]
listener {
instance_port = 80
instance_protocol = "http"
lb_port = 80
lb_protocol = "http"
}
}
resource "aws_key_pair" "auth" {
key_name = "${var.key_name}"
public_key = "${file(var.public_key_path)}"
}
resource "aws_instance" "web" {
# The connection block tells our provisioner how to
# communicate with the resource (instance)
connection {
# The default username for our AMI
user = "ubuntu"
# The connection will use the local SSH agent for authentication.
}
instance_type = "t2.micro"
# Lookup the correct AMI based on the region
# we specified
ami = "${lookup(var.aws_amis, var.aws_region)}"
# The name of our SSH keypair we created above.
key_name = "${aws_key_pair.auth.id}"
# Our Security group to allow HTTP and SSH access
vpc_security_group_ids = ["${aws_security_group.default.id}"]
# We're going to launch into the same subnet as our ELB. In a production
# environment it's more common to have a separate private subnet for
# backend instances.
subnet_id = "${aws_subnet.default.id}"
# We run a remote provisioner on the instance after creating it.
# In this case, we just install nginx and start it. By default,
# this should be on port 80
provisioner "remote-exec" {
inline = [
"sudo apt-get -y update",
"sudo apt-get -y install nginx",
"sudo service nginx start",
]
}
}