キラキラ系エンジニアへの第１歩 4日目（AWS基礎の基礎。Webアプリ基本構成 Part4）

2022年12月19日

キラキラ系エンジニアとは

こちらを参照ください。

今日のアップデート

前回は、こちらのページを元にVPCまで作成しました。

投稿内容にはありませんが、サブネットも引き続き実行したところ問題無く作成できました。

コードは以下です。このページのやつをそのまま貼り付けてterraform planとterraform applyを実行したら問題なくサブネットが作成できました。

# Subnet
# https://www.terraform.io/docs/providers/aws/r/subnet.html
resource "aws_subnet" "public_1a" {
  # 先程作成したVPCを参照し、そのVPC内にSubnetを立てる
  vpc_id = "${aws_vpc.main.id}"

  # Subnetを作成するAZ
  availability_zone = "ap-northeast-1a"

  cidr_block        = "10.0.1.0/24"

  tags = {
    Name = "handson-public-1a"
  }
}

resource "aws_subnet" "public_1c" {
  vpc_id = "${aws_vpc.main.id}"

  availability_zone = "ap-northeast-1c"

  cidr_block        = "10.0.2.0/24"

  tags = {
    Name = "handson-public-1c"
  }
}

resource "aws_subnet" "public_1d" {
  vpc_id = "${aws_vpc.main.id}"

  availability_zone = "ap-northeast-1d"

  cidr_block        = "10.0.3.0/24"

  tags = {
    Name = "handson-public-1d"
  }
}

# Private Subnets
resource "aws_subnet" "private_1a" {
  vpc_id = "${aws_vpc.main.id}"

  availability_zone = "ap-northeast-1a"
  cidr_block        = "10.0.10.0/24"

  tags = {
    Name = "handson-private-1a"
  }
}

resource "aws_subnet" "private_1c" {
  vpc_id = "${aws_vpc.main.id}"

  availability_zone = "ap-northeast-1c"
  cidr_block        = "10.0.20.0/24"

  tags = {
    Name = "handson-private-1c"
  }
}

resource "aws_subnet" "private_1d" {
  vpc_id = "${aws_vpc.main.id}"

  availability_zone = "ap-northeast-1d"
  cidr_block        = "10.0.30.0/24"

  tags = {
    Name = "handson-private-1d"
  }
}

今回は、Internet Getwayのところから進めます。

んで、やってみたらネットワークリソースは全てできたのだが、

肝心のEC2をどうやってやるんだってとこがよくわかんなくなり、

方向転換しこちらをやってみました。

terraformコードは以下

# AWSプロバイダの定義
provider "aws" {
  region = "ap-northeast-1"
  access_key = "xxxxxxxxxxxxxxxxxxxx"
  secret_key = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
}

# VPC
resource "aws_vpc" "tfweb_vpc" {
  cidr_block           = "10.100.0.0/16"
  instance_tenancy     = "default"
  enable_dns_hostnames = true
  enable_dns_support   = true
}

# サブネット
resource "aws_subnet" "tfweb_subnet" {
  vpc_id                  = "${aws_vpc.tfweb_vpc.id}"
  cidr_block              = "10.100.0.0/24"
  availability_zone       = "ap-northeast-1a"
  map_public_ip_on_launch = true
}

# Internet Gateway
resource "aws_internet_gateway" "tfweb_igw" {
  vpc_id = "${aws_vpc.tfweb_vpc.id}"
}

# Route Table
resource "aws_route_table" "tfweb_rt" {
  vpc_id = "${aws_vpc.tfweb_vpc.id}"

  route {
    cidr_block = "0.0.0.0/0"
    gateway_id = aws_internet_gateway.tfweb_igw.id
  }
}

# Associate route table with subnet
resource "aws_route_table_association" "tfweb_rt_association" {
  subnet_id      = aws_subnet.tfweb_subnet.id
  route_table_id = aws_route_table.tfweb_rt.id
}

# EC2 instance
resource "aws_instance" "tfweb_ec2" {
  ami                         = "ami-06098fd00463352b6" # AmazonLinux 2 (x86)
  instance_type               = "t2.micro"
  subnet_id                   = aws_subnet.tfweb_subnet.id
  key_name                    = "xxx" # こちらを見ながら作成

  vpc_security_group_ids = [
    aws_security_group.tfweb_sg_web.id,
    aws_security_group.tfweb_sg_ssh.id
  ]

  user_data = <<EOF
  #!/bin/bash
  yum install -y httpd
  systemctl start httpd.service
  EOF
}

# Security Group
resource "aws_security_group" "tfweb_sg_web" {
  name   = "tfweb_sg_web"
  vpc_id = aws_vpc.tfweb_vpc.id

  ingress {
    description = "allow http"
    from_port   = "80"
    to_port     = "80"
    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"]
  }
}

resource "aws_security_group" "tfweb_sg_ssh" {
  name   = "tfweb_sg_ssh"
  vpc_id = aws_vpc.tfweb_vpc.id

  ingress {
    description = "allow ssh"
    from_port   = "22"
    to_port     = "22"
    protocol    = "tcp"
    cidr_blocks = ["0.0.0.0/0"] # 必要に応じIP制限を設定してください
  }

  egress {
    from_port   = "0"
    to_port     = "0"
    protocol    = "-1"
    cidr_blocks = ["0.0.0.0/0"]
  }
}

上記をterraform planしterraform applyしました。

次に以前作成したReactの計算アプリがGithubに上がっているので

こちらを見ながらAmplifyでデプロイしたら簡単にできました！

今日は、中身の解説が無いですが、