main.tf

resource "aws_vpc" "myvpc" {
  cidr_block           = "192.168.0.0/24"
  instance_tenancy     = "default"
  enable_dns_hostnames = "true"

  tags = {
    Name = "myvpc"
  }
}

resource "aws_security_group" "cluster-ig" {
  name        = "cluster-ig"
  description = "This firewall allows SSH, HTTP and MYSQL"
  vpc_id      = aws_vpc.myvpc.id

  ingress {
    description = "SSH"
    from_port   = 22
    to_port     = 22
    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 = "TCP"
    from_port   = 3306
    to_port     = 3306
    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 = "cluster-ig"
  }
}

resource "aws_subnet" "public" {
  vpc_id                  = aws_vpc.myvpc.id
  cidr_block              = "192.168.0.0/24"
  availability_zone       = "us-east-1a"
  map_public_ip_on_launch = "true"

  tags = {
    Name = "my_public_subnet"
  }
}

resource "aws_internet_gateway" "igw" {
  vpc_id = aws_vpc.myvpc.id

  tags = {
    Name = "igw"
  }
}

resource "aws_route_table" "rt" {
  vpc_id = aws_vpc.myvpc.id

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

  tags = {
    Name = "rt"
  }
}

resource "aws_route_table_association" "a" {
  subnet_id      = aws_subnet.public.id
  route_table_id = aws_route_table.rt.id
}

resource "aws_route_table_association" "b" {
  subnet_id      = aws_subnet.public.id
  route_table_id = aws_route_table.rt.id
}