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Terraform Practice

  • EC2에 SSH 접속을 위한 키페어 생성

    1. 비밀키를 생성합니다
    ssh-keygen -t rsa -b 2048 -f ~/dotoryeee.pem -q -N ""
    1. pem을 사용하려면 권한을 수정해야 합니다
    chmod 400 ~/dotoryeee.pem
    1. AWS에 넘겨줄 공개키를 생성합니다
    ssh-keygen -y -f ~/dotoryeee.pem > ~/dotoryeee.pub

  • Terraform Docs

  • 에러가 자주 났던 부분

    1. EC2 t2.micro는 서울기준 2a, 2c에서만 지원됩니다
    2. VPC 사이더 범위가 서브넷보다 넓은지 확인
    3. MySQL RDS생성시 allocated_storage값에 0은 불가능
    4. DB인스턴스는 별도로 서브넷 그룹을 생성해야 함
    Error: Error creating DB Instance: InvalidParameterCombination: The DB instance and EC2 security group are in different VPCs. The DB instance is in vpc-7ae25b11 and the EC2 security group is in vpc-07d48e73dba07404a
status code: 400, request id: 25f97e75-89d9-4323-9cd3-b09e83675d4e on [rds.tf](http://rds.tf/) line 16, in resource "aws_db_instance" "rds":
16: resource "aws_db_instance" "rds" {
    1. RDS는 반드시 서브넷 2개 이상을 묶어서 구성
    2. 베스천 호스트 사용하는 RDS는 당연시 퍼블릭 엑세스 제한
    Error: Error creating DB Instance: InvalidVPCNetworkStateFault: Cannot create a publicly accessible DBInstance.  The specified VPC does not support DNS resolution, DNS hostnames, or both. Update the VPC and then try again
status code: 400, request id: d26672f9-7f0a-40ac-9e17-6fd0b9fa2558
    1. ssh 접속을 위한 map_public_ip_on_launch (서브넷) 당연히 true

    2. RDS는 생성에 오랜 시간이 걸리는 점 유의

      Terraform Practice/Untitled.png

    3. 보안그룸 이름은 소문자 sg로 시작할 수 없음

    4. RDS 보안그룹은 security_group_names 대신 vpc_security_group_ids 사용
    Error: Error creating DB Instance: InvalidParameterCombination: DB Security Groups can only be associated with VPC DB Instances using API versions 2012-01-15 through 2012-09-17.

연습1 (VPC, Subnets, EC2, IGW)

  • 구성

    Terraform Practice/Untitled%201.png

  • 코드

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    #---------------VPC-----------------
resource "aws_vpc" "main" {
    cidr_block = "10.0.0.0/16"
    instance_tenancy = "default" #전용인스턴스 사용, default는 사용 하지 않음을 의미
    enable_dns_hostnames = true

    tags = {
        Name = "vpc_practice_01"
    }
}
#---------------IGW-----------------
resource "aws_internet_gateway" "default" {
    vpc_id = aws_vpc.main.id

    tags = {
        Name = "igw_practice_01"
    }
}
#---------------Subnet-----------------
resource "aws_subnet" "public_01" {
    vpc_id = aws_vpc.main.id

    cidr_block = "10.0.0.0/24"
    availability_zone = "ap-northeast-2a"

    map_public_ip_on_launch = true

    tags = {
        Name = "public_subnet_01"
    }
}
resource "aws_subnet" "public_02" {
    vpc_id = aws_vpc.main.id

    cidr_block = "10.0.1.0/24"
    availability_zone = "ap-northeast-2c"

    map_public_ip_on_launch = true

    tags = {
        Name = "public_subnet_02"
    }
}
#--------------Association--------------
resource "aws_route_table_association" "public_01_association" {
    subnet_id = aws_subnet.public_01.id
    route_table_id = aws_route_table.public.id
}

resource "aws_route_table_association" "public_02_association" {
    subnet_id = aws_subnet.public_02.id
    route_table_id = aws_route_table.public.id
}
#-------------Route table---------------
resource "aws_route_table" "public" {
    vpc_id = aws_vpc.main.id

    tags = {
        Name = "public_route_table"
    }
}
#-----------Route table Routes------------
resource "aws_route" "public_sub_IGW" {
    route_table_id = aws_route_table.public.id
    destination_cidr_block = "0.0.0.0/0"
    gateway_id = aws_internet_gateway.default.id
}
#----------Security Group for EC2----------
resource "aws_security_group" "practice_01" {
    vpc_id = aws_vpc.main.id
    name = "practice_01_SG"
    description = "SG_for_EC2"

    #-----------인바운드-----------
    ingress {
        from_port = 22
        to_port = 22
        protocol = "tcp"
        cidr_blocks = ["0.0.0.0/0"]
        description = "open SSH from Anywhere"
    }

    #----------아웃바운드-----------
    egress {
        from_port = 0 #모든 포트
        to_port = 0 
        protocol = "-1" #모든 프로토콜
        cidr_blocks = ["0.0.0.0/0"] #리스트 형태도 가능
        description = "open all port from anywhere"
    }
}
#----------ready Public Key--------------
resource "aws_key_pair" "practice_01" {
    key_name = "practice_01"
    public_key = "ssh-rsa...... 키 삭제"
}
#---------public_01  EC2 Instance---------
resource "aws_instance" "dotoryeee-EC2-01" {
    ami = "ami-006e2f9fa7597680a"
    instance_type = "t2.micro"

    subnet_id = aws_subnet.public_01.id

    key_name = aws_key_pair.practice_01.key_name

    vpc_security_group_ids = [aws_security_group.practice_01.id]

    tags = {
        Name = "doto_EC2_01"
    }
}
#---------public_02  EC2 Instance---------
resource "aws_instance" "dotoryeee-EC2-02" {
    ami = "ami-006e2f9fa7597680a"
    instance_type = "t2.micro"

    subnet_id = aws_subnet.public_02.id

    key_name = aws_key_pair.practice_01.key_name

    vpc_security_group_ids = [aws_security_group.practice_01.id]

    tags = {
        Name = "doto_EC2_02"
    }
}

  • terraform apply

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    An execution plan has been generated and is shown below.
Resource actions are indicated with the following symbols:
  + create

Terraform will perform the following actions:

  # aws_instance.dotoryeee-EC2-01 will be created
  + resource "aws_instance" "dotoryeee-EC2-01" {
      + ami                          = "ami-006e2f9fa7597680a"
      + arn                          = (known after apply)
      + associate_public_ip_address  = (known after apply)
      + availability_zone            = (known after apply)
      + cpu_core_count               = (known after apply)
      + cpu_threads_per_core         = (known after apply)
      + get_password_data            = false
      + host_id                      = (known after apply)
      + id                           = (known after apply)
      + instance_state               = (known after apply)
      + instance_type                = "t2.micro"
      + ipv6_address_count           = (known after apply)
      + ipv6_addresses               = (known after apply)
      + key_name                     = "practice_01"
      + outpost_arn                  = (known after apply)
      + password_data                = (known after apply)
      + placement_group              = (known after apply)
      + primary_network_interface_id = (known after apply)
      + private_dns                  = (known after apply)
      + private_ip                   = (known after apply)
      + public_dns                   = (known after apply)
      + public_ip                    = (known after apply)
      + secondary_private_ips        = (known after apply)
      + security_groups              = (known after apply)
      + subnet_id                    = (known after apply)
      + tags                         = {
          + "Name" = "doto_EC2_01"
        }
      + tenancy                      = (known after apply)
      + vpc_security_group_ids       = (known after apply)

      + ebs_block_device {
          + delete_on_termination = (known after apply)
          + device_name           = (known after apply)
          + encrypted             = (known after apply)
          + iops                  = (known after apply)
          + kms_key_id            = (known after apply)
          + snapshot_id           = (known after apply)
          + tags                  = (known after apply)
          + throughput            = (known after apply)
          + volume_id             = (known after apply)
          + volume_size           = (known after apply)
          + volume_type           = (known after apply)
        }

      + enclave_options {
          + enabled = (known after apply)
        }

      + ephemeral_block_device {
          + device_name  = (known after apply)
          + no_device    = (known after apply)
          + virtual_name = (known after apply)
        }

      + metadata_options {
          + http_endpoint               = (known after apply)
          + http_put_response_hop_limit = (known after apply)
          + http_tokens                 = (known after apply)
        }

      + network_interface {
          + delete_on_termination = false
          + device_index          = 0
          + network_interface_id  = (known after apply)
        }

      + root_block_device {
          + delete_on_termination = (known after apply)
          + device_name           = (known after apply)
          + encrypted             = (known after apply)
          + iops                  = (known after apply)
          + kms_key_id            = (known after apply)
          + tags                  = (known after apply)
          + throughput            = (known after apply)
          + volume_id             = (known after apply)
          + volume_size           = (known after apply)
          + volume_type           = (known after apply)
        }
    }

  # aws_instance.dotoryeee-EC2-02 will be created
  + resource "aws_instance" "dotoryeee-EC2-02" {
      + ami                          = "ami-006e2f9fa7597680a"
      + arn                          = (known after apply)
      + associate_public_ip_address  = (known after apply)
      + availability_zone            = (known after apply)
      + cpu_core_count               = (known after apply)
      + cpu_threads_per_core         = (known after apply)
      + get_password_data            = false
      + host_id                      = (known after apply)
      + id                           = (known after apply)
      + instance_state               = (known after apply)
      + instance_type                = "t2.micro"
      + ipv6_address_count           = (known after apply)
      + ipv6_addresses               = (known after apply)
      + key_name                     = "practice_01"
      + outpost_arn                  = (known after apply)
      + password_data                = (known after apply)
      + placement_group              = (known after apply)
      + primary_network_interface_id = (known after apply)
      + private_dns                  = (known after apply)
      + private_ip                   = (known after apply)
      + public_dns                   = (known after apply)
      + public_ip                    = (known after apply)
      + secondary_private_ips        = (known after apply)
      + security_groups              = (known after apply)
      + subnet_id                    = (known after apply)
      + tags                         = {
          + "Name" = "doto_EC2_02"
        }
      + tenancy                      = (known after apply)
      + vpc_security_group_ids       = (known after apply)

      + ebs_block_device {
          + delete_on_termination = (known after apply)
          + device_name           = (known after apply)
          + encrypted             = (known after apply)
          + iops                  = (known after apply)
          + kms_key_id            = (known after apply)
          + snapshot_id           = (known after apply)
          + tags                  = (known after apply)
          + throughput            = (known after apply)
          + volume_id             = (known after apply)
          + volume_size           = (known after apply)
          + volume_type           = (known after apply)
        }

      + enclave_options {
          + enabled = (known after apply)
        }

      + ephemeral_block_device {
          + device_name  = (known after apply)
          + no_device    = (known after apply)
          + virtual_name = (known after apply)
        }

      + metadata_options {
          + http_endpoint               = (known after apply)
          + http_put_response_hop_limit = (known after apply)
          + http_tokens                 = (known after apply)
        }

      + network_interface {
          + delete_on_termination = false
          + device_index          = 0
          + network_interface_id  = (known after apply)
        }

      + root_block_device {
          + delete_on_termination = (known after apply)
          + device_name           = (known after apply)
          + encrypted             = (known after apply)
          + iops                  = (known after apply)
          + kms_key_id            = (known after apply)
          + tags                  = (known after apply)
          + throughput            = (known after apply)
          + volume_id             = (known after apply)
          + volume_size           = (known after apply)
          + volume_type           = (known after apply)
        }
    }

  # aws_internet_gateway.default will be created
  + resource "aws_internet_gateway" "default" {
      + arn      = (known after apply)
      + id       = (known after apply)
      + owner_id = (known after apply)
      + tags     = {
          + "Name" = "igw_practice_01"
        }
      + vpc_id   = (known after apply)
    }

  # aws_key_pair.practice_01 will be created
  + resource "aws_key_pair" "practice_01" {
      + arn         = (known after apply)
      + fingerprint = (known after apply)
      + id          = (known after apply)
      + key_name    = "practice_01"
      + key_pair_id = (known after apply)
      + public_key  = "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDD5D5mHSD/vdgcGmh6Kd57DqLxebcvbrUsHj8DYDW0+9MSvvK874Bm4hpqHliYze/ht7VnzL5+A5qZkCevKGBDeJNmR/QDHccCsCfRuyEmzMlvj3SxzYSH2N4lBG6eZZbQ+0yRl7ny3aeyol5boDkztLZ/PZwVR5IH6BgsNiGClSDtuf2CYoKN7hQufjeuCDcLlQa+ItFa4abMe/mWtMeEh7+ZpC+0KAFFvqY80OCtuUdqq7tcP8uHzQy9mPKvKBieJYitUoStjFEMAro1v34u6193Qgk6DAhyMom4GmLc2+tTyKMsvBlRKUOb87F+2zsATX3Ahz9cMpEkfPTkY15V dotoryeee@i5-6500"
    }

  # aws_network_interface.public_01 will be created
  + resource "aws_network_interface" "public_01" {
      + id                 = (known after apply)
      + ipv6_address_count = (known after apply)
      + ipv6_addresses     = (known after apply)
      + mac_address        = (known after apply)
      + outpost_arn        = (known after apply)
      + private_dns_name   = (known after apply)
      + private_ip         = (known after apply)
      + private_ips        = (known after apply)
      + private_ips_count  = (known after apply)
      + security_groups    = (known after apply)
      + source_dest_check  = true
      + subnet_id          = (known after apply)
      + tags               = {
          + "Name" = "interface_public_01"
        }

      + attachment {
          + attachment_id = (known after apply)
          + device_index  = (known after apply)
          + instance      = (known after apply)
        }
    }

  # aws_network_interface.public_02 will be created
  + resource "aws_network_interface" "public_02" {
      + id                 = (known after apply)
      + ipv6_address_count = (known after apply)
      + ipv6_addresses     = (known after apply)
      + mac_address        = (known after apply)
      + outpost_arn        = (known after apply)
      + private_dns_name   = (known after apply)
      + private_ip         = (known after apply)
      + private_ips        = (known after apply)
      + private_ips_count  = (known after apply)
      + security_groups    = (known after apply)
      + source_dest_check  = true
      + subnet_id          = (known after apply)
      + tags               = {
          + "Name" = "interface_public_02"
        }

      + attachment {
          + attachment_id = (known after apply)
          + device_index  = (known after apply)
          + instance      = (known after apply)
        }
    }

  # aws_route.public_sub_IGW will be created
  + resource "aws_route" "public_sub_IGW" {
      + destination_cidr_block     = "0.0.0.0/0"
      + destination_prefix_list_id = (known after apply)
      + egress_only_gateway_id     = (known after apply)
      + gateway_id                 = (known after apply)
      + id                         = (known after apply)
      + instance_id                = (known after apply)
      + instance_owner_id          = (known after apply)
      + local_gateway_id           = (known after apply)
      + nat_gateway_id             = (known after apply)
      + network_interface_id       = (known after apply)
      + origin                     = (known after apply)
      + route_table_id             = (known after apply)
      + state                      = (known after apply)
    }

  # aws_route_table.public will be created
  + resource "aws_route_table" "public" {
      + id               = (known after apply)
      + owner_id         = (known after apply)
      + propagating_vgws = (known after apply)
      + route            = (known after apply)
      + tags             = {
          + "Name" = "public_route_table"
        }
      + vpc_id           = (known after apply)
    }

  # aws_route_table_association.public_01_association will be created
  + resource "aws_route_table_association" "public_01_association" {
      + id             = (known after apply)
      + route_table_id = (known after apply)
      + subnet_id      = (known after apply)
    }

  # aws_route_table_association.public_02_association will be created
  + resource "aws_route_table_association" "public_02_association" {
      + id             = (known after apply)
      + route_table_id = (known after apply)
      + subnet_id      = (known after apply)
    }

  # aws_security_group.practice_01 will be created
  + resource "aws_security_group" "practice_01" {
      + arn                    = (known after apply)
      + description            = "SG_for_EC2"
      + egress                 = [
          + {
              + cidr_blocks      = [
                  + "0.0.0.0/0",
                ]
              + description      = "open all port from anywhere"
              + from_port        = 0
              + ipv6_cidr_blocks = []
              + prefix_list_ids  = []
              + protocol         = "-1"
              + security_groups  = []
              + self             = false
              + to_port          = 0
            },
        ]
      + id                     = (known after apply)
      + ingress                = [
          + {
              + cidr_blocks      = [
                  + "0.0.0.0/0",
                ]
              + description      = "open SSH from Anywhere"
              + from_port        = 22
              + ipv6_cidr_blocks = []
              + prefix_list_ids  = []
              + protocol         = "tcp"
              + security_groups  = []
              + self             = false
              + to_port          = 22
            },
        ]
      + name                   = "practice_01_SG"
      + name_prefix            = (known after apply)
      + owner_id               = (known after apply)
      + revoke_rules_on_delete = false
      + vpc_id                 = (known after apply)
    }

  # aws_subnet.public_01 will be created
  + resource "aws_subnet" "public_01" {
      + arn                             = (known after apply)
      + assign_ipv6_address_on_creation = false
      + availability_zone               = "ap-northeast-2a"
      + availability_zone_id            = (known after apply)
      + cidr_block                      = "10.0.0.0/24"
      + id                              = (known after apply)
      + ipv6_cidr_block_association_id  = (known after apply)
      + map_public_ip_on_launch         = true
      + owner_id                        = (known after apply)
      + tags                            = {
          + "Name" = "public_subnet_01"
        }
      + vpc_id                          = (known after apply)
    }

  # aws_subnet.public_02 will be created
  + resource "aws_subnet" "public_02" {
      + arn                             = (known after apply)
      + assign_ipv6_address_on_creation = false
      + availability_zone               = "ap-northeast-2c"
      + availability_zone_id            = (known after apply)
      + cidr_block                      = "10.0.1.0/24"
      + id                              = (known after apply)
      + ipv6_cidr_block_association_id  = (known after apply)
      + map_public_ip_on_launch         = true
      + owner_id                        = (known after apply)
      + tags                            = {
          + "Name" = "public_subnet_02"
        }
      + vpc_id                          = (known after apply)
    }

  # aws_vpc.main will be created
  + resource "aws_vpc" "main" {
      + arn                              = (known after apply)
      + assign_generated_ipv6_cidr_block = false
      + cidr_block                       = "10.0.0.0/16"
      + default_network_acl_id           = (known after apply)
      + default_route_table_id           = (known after apply)
      + default_security_group_id        = (known after apply)
      + dhcp_options_id                  = (known after apply)
      + enable_classiclink               = (known after apply)
      + enable_classiclink_dns_support   = (known after apply)
      + enable_dns_hostnames             = true
      + enable_dns_support               = true
      + id                               = (known after apply)
      + instance_tenancy                 = "default"
      + ipv6_association_id              = (known after apply)
      + ipv6_cidr_block                  = (known after apply)
      + main_route_table_id              = (known after apply)
      + owner_id                         = (known after apply)
      + tags                             = {
          + "Name" = "vpc_practice_01"
        }
    }

Plan: 14 to add, 0 to change, 0 to destroy.

  • 결과

    Terraform Practice/Untitled%202.png

    Terraform Practice/Untitled%203.png

    EC2 SSH 접속까지 성공

    EC2 SSH 접속까지 성공

연습2 (RDS, Bastion)

  • 구성

    Terraform Practice/Untitled%205.png

  • 코드

    • variables.tf
    variables.tf
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    variable "aws_region" {
  description = "region for AWS"
}

variable "vpc_name" {
  description = "name for practice_02 VPC"
}

variable "subnet_name" {
}

variable "instance_names" {
  type = list(string)
}

variable "az" {
  type    = list(string)
  default = ["ap-northeast-2a"]
}

variable "ami_id_maps" {
  type    = map(any)
  default = {}
}

variable "instance_type" {
}

    - terraform.tfvars

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    aws_region = "ap-northeast-2"

vpc_name = "vpc_practice_02"

subnet_name = "subnet_practice_02"

az = [
    "ap-northeast-2a", 
    "ap-northeast-2c"
]

instance_names = [
    "public-01", 
    "public-02"
]

ami_id_maps = {
    amazon_linux_2 = "ami-006e2f9fa7597680a"
    ubuntu_20_04 = "ami-00f1068284b9eca92"
}

instance_type = "t2.micro"
    • provider.tf
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    provider "aws" {
  region = var.aws_region
}
    • vpc.tf
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    #------------VPC-------------
resource "aws_vpc" "main" {
  cidr_block       = "10.0.0.0/16"
  instance_tenancy = "default"

  enable_dns_support = "true"

  tags = {
    Name = var.vpc_name
  }
}
################PUBLIC SUBNET#################
#-------------IGW---------------
resource "aws_internet_gateway" "default" {
  vpc_id = aws_vpc.main.id

  tags = {
    Name = "practice_02"
  }
}
#------------subnet-------------
resource "aws_subnet" "public" {
  vpc_id     = aws_vpc.main.id
  cidr_block = "10.0.0.0/24"

  availability_zone = var.az[0]

  map_public_ip_on_launch = true

  tags = {
    "Name" = "public_subnet"
  }
}
#------------association-------------
resource "aws_route_table_association" "association1" {
  subnet_id      = aws_subnet.public.id
  route_table_id = aws_route_table.public.id
}
#------------router table------------
resource "aws_route_table" "public" {
  vpc_id = aws_vpc.main.id

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

  tags = {
    "Name" = "public_table"
  }
}
################PRIVATE SUBNET#################
#-------------subnet-------------
resource "aws_subnet" "private" {
  vpc_id = aws_vpc.main.id

  availability_zone = var.az[0]

  cidr_block = "10.0.1.0/24"
}

resource "aws_subnet" "private2" {
  vpc_id = aws_vpc.main.id

  availability_zone = var.az[1]

  cidr_block = "10.0.2.0/24"
}
    • ec2.tf
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    #----------------SG---------------------
resource "aws_security_group" "public_ec2" {
  vpc_id = aws_vpc.main.id

  name        = "allow SSH"
  description = "allow SSH from anywhere"

  ingress {
    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" = "SG-for-publicEC2"
  }
}
#-------------Key pair--------------
resource "aws_key_pair" "dotoryeee" {
  key_name   = "dotoryeee"
  public_key = "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDD5D5mHSD/vdgcGmh6Kd57DqLxebcvbrUsHj8DYDW0+9MSvvK874Bm4hpqHliYze/ht7VnzL5+A5qZkCevKGBDeJNmR/QDHccCsCfRuyEmzMlvj3SxzYSH2N4lBG6eZZbQ+0yRl7ny3aeyol5boDkztLZ/PZwVR5IH6BgsNiGClSDtuf2CYoKN7hQufjeuCDcLlQa+ItFa4abMe/mWtMeEh7+ZpC+0KAFFvqY80OCtuUdqq7tcP8uHzQy9mPKvKBieJYitUoStjFEMAro1v34u6193Qgk6DAhyMom4GmLc2+tTyKMsvBlRKUOb87F+2zsATX3Ahz9cMpEkfPTkY15V dotoryeee@i5-6500"
}
#----------------EC2---------------------
resource "aws_instance" "public_01" {
  ami           = var.ami_id_maps["amazon_linux_2"]
  instance_type = var.instance_type

  subnet_id = aws_subnet.public.id

  vpc_security_group_ids = [aws_security_group.public_ec2.id]

  key_name = aws_key_pair.dotoryeee.key_name

  tags = {
    Name = var.instance_names[0]
  }
}

resource "aws_instance" "public_02" {
  ami           = var.ami_id_maps["ubuntu_20_04"]
  instance_type = var.instance_type

  subnet_id = aws_subnet.public.id

  vpc_security_group_ids = [aws_security_group.public_ec2.id]

  key_name = aws_key_pair.dotoryeee.key_name

  tags = {
    Name = var.instance_names[1]
  }
}

  • rds.tf

    Warning

    💡 지금은 aws_db_instance에서 name 대신 db_name으로 작성합니다

    rds.tf
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    #--------------Security Group----------------
resource "aws_security_group" "rds" {
  vpc_id = aws_vpc.main.id
  name   = "SG-for-RDS"

  ingress {
    from_port       = 3306
    to_port         = 3306
    protocol        = "tcp"
    security_groups = [aws_security_group.public_ec2.id]
  }
}
#---------------RDS Subnet Group--------
resource "aws_db_subnet_group" "_" {
  name = "subnet_for_rds"
  subnet_ids = [
    aws_subnet.private.id,
    aws_subnet.private2.id
  ]
}
#----------------RDS instance-------------
resource "aws_db_instance" "_" {
  #settings for Free tier
  instance_class      = "db.t2.micro"
  skip_final_snapshot = true
  allocated_storage   = 10
  engine              = "mysql"
  engine_version      = "5.7"
  #settings for Free tier

  identifier = "demodb"
  username   = "root"
  password   = "password"
  name       = "mydb"

  db_subnet_group_name = aws_db_subnet_group._.name

  vpc_security_group_ids = [aws_security_group.rds.id]
}
    • terraform apply
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    An execution plan has been generated and is shown below.
Resource actions are indicated with the following symbols:
  + create

Terraform will perform the following actions:

  # aws_db_instance._ will be created
  + resource "aws_db_instance" "_" {
      + address                               = (known after apply)
      + allocated_storage                     = 10
      + apply_immediately                     = (known after apply)
      + arn                                   = (known after apply)
      + auto_minor_version_upgrade            = true
      + availability_zone                     = (known after apply)
      + backup_retention_period               = (known after apply)
      + backup_window                         = (known after apply)
      + ca_cert_identifier                    = (known after apply)
      + character_set_name                    = (known after apply)
      + copy_tags_to_snapshot                 = false
      + db_subnet_group_name                  = "subnet_for_rds"
      + delete_automated_backups              = true
      + endpoint                              = (known after apply)
      + engine                                = "mysql"
      + engine_version                        = "5.7"
      + hosted_zone_id                        = (known after apply)
      + id                                    = (known after apply)
      + identifier                            = "demodb"
      + identifier_prefix                     = (known after apply)
      + instance_class                        = "db.t2.micro"
      + kms_key_id                            = (known after apply)
      + latest_restorable_time                = (known after apply)
      + license_model                         = (known after apply)
      + maintenance_window                    = (known after apply)
      + monitoring_interval                   = 0
      + monitoring_role_arn                   = (known after apply)
      + multi_az                              = (known after apply)
      + name                                  = "mydb"
      + option_group_name                     = (known after apply)
      + parameter_group_name                  = (known after apply)
      + password                              = (sensitive value)
      + performance_insights_enabled          = false
      + performance_insights_kms_key_id       = (known after apply)
      + performance_insights_retention_period = (known after apply)
      + port                                  = (known after apply)
      + publicly_accessible                   = false
      + replicas                              = (known after apply)
      + resource_id                           = (known after apply)
      + skip_final_snapshot                   = true
      + status                                = (known after apply)
      + storage_type                          = (known after apply)
      + timezone                              = (known after apply)
      + username                              = "root"
      + vpc_security_group_ids                = (known after apply)
    }

  # aws_db_subnet_group._ will be created
  + resource "aws_db_subnet_group" "_" {
      + arn         = (known after apply)
      + description = "Managed by Terraform"
      + id          = (known after apply)
      + name        = "subnet_for_rds"
      + name_prefix = (known after apply)
      + subnet_ids  = (known after apply)
    }

  # aws_instance.public_01 will be created
  + resource "aws_instance" "public_01" {
      + ami                          = "ami-006e2f9fa7597680a"
      + arn                          = (known after apply)
      + associate_public_ip_address  = (known after apply)
      + availability_zone            = (known after apply)
      + cpu_core_count               = (known after apply)
      + cpu_threads_per_core         = (known after apply)
      + get_password_data            = false
      + host_id                      = (known after apply)
      + id                           = (known after apply)
      + instance_state               = (known after apply)
      + instance_type                = "t2.micro"
      + ipv6_address_count           = (known after apply)
      + ipv6_addresses               = (known after apply)
      + key_name                     = "dotoryeee"
      + outpost_arn                  = (known after apply)
      + password_data                = (known after apply)
      + placement_group              = (known after apply)
      + primary_network_interface_id = (known after apply)
      + private_dns                  = (known after apply)
      + private_ip                   = (known after apply)
      + public_dns                   = (known after apply)
      + public_ip                    = (known after apply)
      + secondary_private_ips        = (known after apply)
      + security_groups              = (known after apply)
      + source_dest_check            = true
      + subnet_id                    = (known after apply)
      + tags                         = {
          + "Name" = "public-01"
        }
      + tenancy                      = (known after apply)
      + vpc_security_group_ids       = (known after apply)

      + ebs_block_device {
          + delete_on_termination = (known after apply)
          + device_name           = (known after apply)
          + encrypted             = (known after apply)
          + iops                  = (known after apply)
          + kms_key_id            = (known after apply)
          + snapshot_id           = (known after apply)
          + tags                  = (known after apply)
          + throughput            = (known after apply)
          + volume_id             = (known after apply)
          + volume_size           = (known after apply)
          + volume_type           = (known after apply)
        }

      + enclave_options {
          + enabled = (known after apply)
        }

      + ephemeral_block_device {
          + device_name  = (known after apply)
          + no_device    = (known after apply)
          + virtual_name = (known after apply)
        }

      + metadata_options {
          + http_endpoint               = (known after apply)
          + http_put_response_hop_limit = (known after apply)
          + http_tokens                 = (known after apply)
        }

      + network_interface {
          + delete_on_termination = (known after apply)
          + device_index          = (known after apply)
          + network_interface_id  = (known after apply)
        }

      + root_block_device {
          + delete_on_termination = (known after apply)
          + device_name           = (known after apply)
          + encrypted             = (known after apply)
          + iops                  = (known after apply)
          + kms_key_id            = (known after apply)
          + tags                  = (known after apply)
          + throughput            = (known after apply)
          + volume_id             = (known after apply)
          + volume_size           = (known after apply)
          + volume_type           = (known after apply)
        }
    }

  # aws_instance.public_02 will be created
  + resource "aws_instance" "public_02" {
      + ami                          = "ami-00f1068284b9eca92"
      + arn                          = (known after apply)
      + associate_public_ip_address  = (known after apply)
      + availability_zone            = (known after apply)
      + cpu_core_count               = (known after apply)
      + cpu_threads_per_core         = (known after apply)
      + get_password_data            = false
      + host_id                      = (known after apply)
      + id                           = (known after apply)
      + instance_state               = (known after apply)
      + instance_type                = "t2.micro"
      + ipv6_address_count           = (known after apply)
      + ipv6_addresses               = (known after apply)
      + key_name                     = "dotoryeee"
      + outpost_arn                  = (known after apply)
      + password_data                = (known after apply)
      + placement_group              = (known after apply)
      + primary_network_interface_id = (known after apply)
      + private_dns                  = (known after apply)
      + private_ip                   = (known after apply)
      + public_dns                   = (known after apply)
      + public_ip                    = (known after apply)
      + secondary_private_ips        = (known after apply)
      + security_groups              = (known after apply)
      + source_dest_check            = true
      + subnet_id                    = (known after apply)
      + tags                         = {
          + "Name" = "public-02"
        }
      + tenancy                      = (known after apply)
      + vpc_security_group_ids       = (known after apply)

      + ebs_block_device {
          + delete_on_termination = (known after apply)
          + device_name           = (known after apply)
          + encrypted             = (known after apply)
          + iops                  = (known after apply)
          + kms_key_id            = (known after apply)
          + snapshot_id           = (known after apply)
          + tags                  = (known after apply)
          + throughput            = (known after apply)
          + volume_id             = (known after apply)
          + volume_size           = (known after apply)
          + volume_type           = (known after apply)
        }

      + enclave_options {
          + enabled = (known after apply)
        }

      + ephemeral_block_device {
          + device_name  = (known after apply)
          + no_device    = (known after apply)
          + virtual_name = (known after apply)
        }

      + metadata_options {
          + http_endpoint               = (known after apply)
          + http_put_response_hop_limit = (known after apply)
          + http_tokens                 = (known after apply)
        }

      + network_interface {
          + delete_on_termination = (known after apply)
          + device_index          = (known after apply)
          + network_interface_id  = (known after apply)
        }

      + root_block_device {
          + delete_on_termination = (known after apply)
          + device_name           = (known after apply)
          + encrypted             = (known after apply)
          + iops                  = (known after apply)
          + kms_key_id            = (known after apply)
          + tags                  = (known after apply)
          + throughput            = (known after apply)
          + volume_id             = (known after apply)
          + volume_size           = (known after apply)
          + volume_type           = (known after apply)
        }
    }

  # aws_internet_gateway.default will be created
  + resource "aws_internet_gateway" "default" {
      + arn      = (known after apply)
      + id       = (known after apply)
      + owner_id = (known after apply)
      + tags     = {
          + "Name" = "practice_02"
        }
      + vpc_id   = (known after apply)
    }

  # aws_key_pair.dotoryeee will be created
  + resource "aws_key_pair" "dotoryeee" {
      + arn         = (known after apply)
      + fingerprint = (known after apply)
      + id          = (known after apply)
      + key_name    = "dotoryeee"
      + key_pair_id = (known after apply)
      + public_key  = "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDD5D5mHSD/vdgcGmh6Kd57DqLxebcvbrUsHj8DYDW0+9MSvvK874Bm4hpqHliYze/ht7VnzL5+A5qZkCevKGBDeJNmR/QDHccCsCfRuyEmzMlvj3SxzYSH2N4lBG6eZZbQ+0yRl7ny3aeyol5boDkztLZ/PZwVR5IH6BgsNiGClSDtuf2CYoKN7hQufjeuCDcLlQa+ItFa4abMe/mWtMeEh7+ZpC+0KAFFvqY80OCtuUdqq7tcP8uHzQy9mPKvKBieJYitUoStjFEMAro1v34u6193Qgk6DAhyMom4GmLc2+tTyKMsvBlRKUOb87F+2zsATX3Ahz9cMpEkfPTkY15V dotoryeee@i5-6500"
    }

  # aws_route_table.public will be created
  + resource "aws_route_table" "public" {
      + id               = (known after apply)
      + owner_id         = (known after apply)
      + propagating_vgws = (known after apply)
      + route            = [
          + {
              + cidr_block                = "0.0.0.0/0"
              + egress_only_gateway_id    = ""
              + gateway_id                = (known after apply)
              + instance_id               = ""
              + ipv6_cidr_block           = ""
              + local_gateway_id          = ""
              + nat_gateway_id            = ""
              + network_interface_id      = ""
              + transit_gateway_id        = ""
              + vpc_endpoint_id           = ""
              + vpc_peering_connection_id = ""
            },
        ]
      + tags             = {
          + "Name" = "public_table"
        }
      + vpc_id           = (known after apply)
    }

  # aws_route_table_association.association1 will be created
  + resource "aws_route_table_association" "association1" {
      + id             = (known after apply)
      + route_table_id = (known after apply)
      + subnet_id      = (known after apply)
    }

  # aws_security_group.public_ec2 will be created
  + resource "aws_security_group" "public_ec2" {
      + arn                    = (known after apply)
      + description            = "allow SSH from anywhere"
      + egress                 = [
          + {
              + cidr_blocks      = [
                  + "0.0.0.0/0",
                ]
              + description      = ""
              + from_port        = 0
              + ipv6_cidr_blocks = []
              + prefix_list_ids  = []
              + protocol         = "-1"
              + security_groups  = []
              + self             = false
              + to_port          = 0
            },
        ]
      + id                     = (known after apply)
      + ingress                = [
          + {
              + cidr_blocks      = [
                  + "0.0.0.0/0",
                ]
              + description      = ""
              + from_port        = 22
              + ipv6_cidr_blocks = []
              + prefix_list_ids  = []
              + protocol         = "tcp"
              + security_groups  = []
              + self             = false
              + to_port          = 22
            },
        ]
      + name                   = "allow SSH"
      + name_prefix            = (known after apply)
      + owner_id               = (known after apply)
      + revoke_rules_on_delete = false
      + tags                   = {
          + "Name" = "SG-for-publicEC2"
        }
      + vpc_id                 = (known after apply)
    }

  # aws_security_group.rds will be created
  + resource "aws_security_group" "rds" {
      + arn                    = (known after apply)
      + description            = "Managed by Terraform"
      + egress                 = (known after apply)
      + id                     = (known after apply)
      + ingress                = [
          + {
              + cidr_blocks      = []
              + description      = ""
              + from_port        = 3306
              + ipv6_cidr_blocks = []
              + prefix_list_ids  = []
              + protocol         = "tcp"
              + security_groups  = (known after apply)
              + self             = false
              + to_port          = 3306
            },
        ]
      + name                   = "SG-for-RDS"
      + name_prefix            = (known after apply)
      + owner_id               = (known after apply)
      + revoke_rules_on_delete = false
      + vpc_id                 = (known after apply)
    }

  # aws_subnet.private will be created
  + resource "aws_subnet" "private" {
      + arn                             = (known after apply)
      + assign_ipv6_address_on_creation = false
      + availability_zone               = "ap-northeast-2a"
      + availability_zone_id            = (known after apply)
      + cidr_block                      = "10.0.1.0/24"
      + id                              = (known after apply)
      + ipv6_cidr_block_association_id  = (known after apply)
      + map_public_ip_on_launch         = false
      + owner_id                        = (known after apply)
      + vpc_id                          = (known after apply)
    }

  # aws_subnet.private2 will be created
  + resource "aws_subnet" "private2" {
      + arn                             = (known after apply)
      + assign_ipv6_address_on_creation = false
      + availability_zone               = "ap-northeast-2c"
      + availability_zone_id            = (known after apply)
      + cidr_block                      = "10.0.2.0/24"
      + id                              = (known after apply)
      + ipv6_cidr_block_association_id  = (known after apply)
      + map_public_ip_on_launch         = false
      + owner_id                        = (known after apply)
      + vpc_id                          = (known after apply)
    }

  # aws_subnet.public will be created
  + resource "aws_subnet" "public" {
      + arn                             = (known after apply)
      + assign_ipv6_address_on_creation = false
      + availability_zone               = "ap-northeast-2a"
      + availability_zone_id            = (known after apply)
      + cidr_block                      = "10.0.0.0/24"
      + id                              = (known after apply)
      + ipv6_cidr_block_association_id  = (known after apply)
      + map_public_ip_on_launch         = true
      + owner_id                        = (known after apply)
      + tags                            = {
          + "Name" = "public_subnet"
        }
      + vpc_id                          = (known after apply)
    }

  # aws_vpc.main will be created
  + resource "aws_vpc" "main" {
      + arn                              = (known after apply)
      + assign_generated_ipv6_cidr_block = false
      + cidr_block                       = "10.0.0.0/16"
      + default_network_acl_id           = (known after apply)
      + default_route_table_id           = (known after apply)
      + default_security_group_id        = (known after apply)
      + dhcp_options_id                  = (known after apply)
      + enable_classiclink               = (known after apply)
      + enable_classiclink_dns_support   = (known after apply)
      + enable_dns_hostnames             = (known after apply)
      + enable_dns_support               = true
      + id                               = (known after apply)
      + instance_tenancy                 = "default"
      + ipv6_association_id              = (known after apply)
      + ipv6_cidr_block                  = (known after apply)
      + main_route_table_id              = (known after apply)
      + owner_id                         = (known after apply)
      + tags                             = {
          + "Name" = "vpc_practice_02"
        }
    }

Plan: 14 to add, 0 to change, 0 to destroy.

  • 결과

    • 콘솔에서 EC2 확인

      Terraform Practice/Untitled%206.png

    • 배스천 인스턴스에 SSH 접속

      Terraform Practice/Untitled%207.png

    • 자동으로 세팅 완료된 RDS 서버

      Terraform Practice/Untitled%208.png

    • Datagrip 터널링 세팅

      Terraform Practice/Untitled%209.png

    • Datagrip DB접속 세팅

      Terraform Practice/Untitled%2010.png

    • Bastion을 이용한 RDS DB 접속 성공

      Terraform Practice/Untitled%2011.png

연습3 (Application Load Balancer)

  • 구성

    Terraform Practice/Untitled%2012.png

  • 코드

  • 구성

  • 코드