# Terraform 示例
# 创建自定义vpc、gw、subnet、networkr、eip和instance
terraform {
required_providers {
aws = {
source = "hashicorp/aws"
version = "~> 2.70"
}
}
}
provider "aws" {
profile = "default"
region = "us-east-2"
}
# 1. Create vpc
resource "aws_vpc" "prod-vpc" {
cidr_block = "10.0.0.0/16"
tags = {
Name = "production"
}
}
# 2. Create Internet Gateway
resource "aws_internet_gateway" "gw" {
vpc_id = aws_vpc.prod-vpc.id
}
# 3. Create Custom Route Table
resource "aws_route_table" "prod-route-table" {
vpc_id = aws_vpc.prod-vpc.id
route {
cidr_block = "0.0.0.0/0"
gateway_id = aws_internet_gateway.gw.id
}
route {
ipv6_cidr_block = "::/0"
gateway_id = aws_internet_gateway.gw.id
}
tags = {
Name = "Prod"
}
}
# 4. Create a Subnet
resource "aws_subnet" "subnet-1" {
vpc_id = aws_vpc.prod-vpc.id
cidr_block = "10.0.1.0/24"
availability_zone = "us-east-2a"
tags = {
Name = "prod-subnet"
}
}
# 5. Associate subnet with Route Table
resource "aws_route_table_association" "a" {
subnet_id = aws_subnet.subnet-1.id
route_table_id = aws_route_table.prod-route-table.id
}
# 6. Create Security Group to allow port 22,80,443
resource "aws_security_group" "allow_web" {
name = "allow_web_traffic"
description = "Allow Web inbound traffic"
vpc_id = aws_vpc.prod-vpc.id
ingress {
description = "HTTPS"
from_port = 443
to_port = 443
protocol = "tcp"
cidr_blocks = ["0.0.0.0/0"]
}
ingress {
description = "HTTP"
from_port = 80
to_port = 80
protocol = "tcp"
cidr_blocks = ["0.0.0.0/0"]
}
ingress {
description = "SSH"
from_port = 22
to_port = 22
protocol = "tcp"
cidr_blocks = ["0.0.0.0/0"]
}
egress {
from_port = 0
to_port = 0
protocol = "-1"
cidr_blocks = ["0.0.0.0/0"]
}
tags = {
Name = "allow_web"
}
}
# 7. Create a network interface with an ip in the subnet that was created in step 4
resource "aws_network_interface" "web-server-nic" {
subnet_id = aws_subnet.subnet-1.id
private_ips = ["10.0.1.11"]
security_groups = [aws_security_group.allow_web.id]
}
# 8. Assign an elastic IP to the network interface created in step 7
resource "aws_eip" "one" {
vpc = true
network_interface = aws_network_interface.web-server-nic.id
associate_with_private_ip = "10.0.1.11"
depends_on = [aws_internet_gateway.gw]
}
output "server_public_ip" {
value = aws_eip.one.public_ip
}
# 9. Create Ubuntu server and install/enable apache2
resource "aws_instance" "web-server-instance" {
ami = "ami-07efac79022b86107"
instance_type = "t2.micro"
availability_zone = "us-east-2a"
key_name = "test-key"
network_interface {
device_index = 0
network_interface_id = aws_network_interface.web-server-nic.id
}
user_data = <<-EOF
#!/bin/bash
sudo apt update -y
sudo apt install apache2 -y
sudo systemctl start apache2
sudo bash -c 'echo "<h1>my first server created by Terraform.</h1>" > /var/www/html/index.html'
EOF
tags = {
Name = "web-server"
}
}
output "server_private_ip" {
value = aws_instance.web-server-instance.private_ip
}
output "server_id" {
value = aws_instance.web-server-instance.id
}
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# 创建自定义role并附加规则、绑定到instance
resource "aws_iam_role" "example" {
name = "example"
# assume_role_policy is omitted for brevity in this example. See the
# documentation for aws_iam_role for a complete example.
assume_role_policy = "..."
}
resource "aws_iam_instance_profile" "example" {
# Because this expression refers to the role, Terraform can infer
# automatically that the role must be created first.
role = aws_iam_role.example.name
}
resource "aws_iam_role_policy" "example" {
name = "example"
role = aws_iam_role.example.name
policy = jsonencode({
"Statement" = [{
# This policy allows software running on the EC2 instance to
# access the S3 API.
"Action" = "s3:*",
"Effect" = "Allow",
}],
})
}
resource "aws_instance" "example" {
ami = "ami-a1b2c3d4"
instance_type = "t2.micro"
# Terraform can infer from this that the instance profile must
# be created before the EC2 instance.
iam_instance_profile = aws_iam_instance_profile.example
# However, if software running in this EC2 instance needs access
# to the S3 API in order to boot properly, there is also a "hidden"
# dependency on the aws_iam_role_policy that Terraform cannot
# automatically infer, so it must be declared explicitly:
depends_on = [
aws_iam_role_policy.example,
]
}
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# 参考资料
- https://github.com/terraform-aws-modules
v1.3.6