[初心者歓迎] Packer + Ansible + TerraformでWordPressを構築 ref: http://qiita.com/jkkitakita/items/805bc6dcfebcdbd47c00

file2.txt

~/hashicorp/packer

 ~/h/packer ❯❯❯ packer build -var-file=variables.json packer-wordpress.json
amazon-ebs output will be in this color.

==> amazon-ebs: Prevalidating AMI Name...
    amazon-ebs: Found Image ID: ami-504f2037

~~ 中略 ~~

Build 'amazon-ebs' finished.

==> Builds finished. The artifacts of successful builds are:
--> amazon-ebs: AMIs were created:

ap-northeast-1: ami-504f2037
 ~/h/packer ❯❯❯

file6.txt

 ~/h/terraform ❯❯❯ terraform apply
data.aws_ami.wordpress: Refreshing state...
aws_instance.wordpress: Creating...
  ami:                      "" => "ami-504f2037" // Packerで作成したAMIを取得できてる。
  availability_zone:        "" => "<computed>"
  ebs_block_device.#:       "" => "<computed>"
  ephemeral_block_device.#: "" => "<computed>"
  instance_state:           "" => "<computed>"
  instance_type:            "" => "t2.micro"
  key_name:                 "" => "jkkitakita"
  network_interface_id:     "" => "<computed>"
  placement_group:          "" => "<computed>"
  private_dns:              "" => "<computed>"
  private_ip:               "" => "<computed>"
  public_dns:               "" => "<computed>"
  public_ip:                "" => "<computed>"
  root_block_device.#:      "" => "<computed>"
  security_groups.#:        "" => "<computed>"
  source_dest_check:        "" => "true"
  subnet_id:                "" => "<computed>"
  tags.%:                   "" => "1"
  tags.Name:                "" => "wordpress01"
  tenancy:                  "" => "<computed>"
  vpc_security_group_ids.#: "" => "<computed>"
aws_instance.wordpress: Still creating... (10s elapsed)
aws_instance.wordpress: Still creating... (20s elapsed)
aws_instance.wordpress: Creation complete

Apply complete! Resources: 1 added, 0 changed, 0 destroyed.

The state of your infrastructure has been saved to the path
below. This state is required to modify and destroy your
infrastructure, so keep it safe. To inspect the complete state
use the `terraform show` command.

State path: terraform.tfstate
 ~/h/terraform ❯❯❯

main.tf

provider "aws" {
  region = "${var.region}"
}

packer-wordpress.json

{
  "builders": [{
    "type": "amazon-ebs",
    "region": "{{user `aws_region`}}",
    "source_ami": "{{user `aws_source_ami_id`}}",
    "instance_type": "{{user `aws_instance_type`}}",
    "ssh_username": "{{user `ssh_username`}}",
    "ssh_timeout": "5m",
    "ami_name": "Packer-ansible-{{timestamp}}",
    "tags": {
      "Name": "aws-{{user `aws_region`}}",
      "Environment": "{{user `aws_environment`}}",
      "Release": "Latest"
    }
  }],
  "provisioners": [
    {
      "type": "shell",
      "execute_command": "echo {{user `ssh_username`}} | {{ .Vars }} sudo -E -S sh '{{ .Path }}'",
      "inline": [
        "mkdir -p /ops/{{user `scripts_dir`}}",
        "chmod a+w /ops/{{user `scripts_dir`}}"
      ]
    },
    {
      "type": "file",
      "source": "{{user `scripts_dir`}}/.",
      "destination": "/ops/{{user `scripts_dir`}}"
    },
    {
      "type": "shell",
      "execute_command": "echo {{user `ssh_username`}} | {{ .Vars }} sudo -E -S sh '{{ .Path }}'",
      "inline": [
        "bash /ops/{{user `scripts_dir`}}/bootstrap.sh",
        "bash /ops/{{user `scripts_dir`}}/ansible.sh"
      ]
    },
    {
      "type": "ansible-local",
      "group_vars": "./ansible/group_vars",
      "playbook_file": "./ansible/site.yml",
      "role_paths": ["./ansible/roles/common", "./ansible/roles/mysql", "./ansible/roles/nginx", "./ansible/roles/php-fpm", "./ansible/roles/wordpress"],
      "staging_directory": "/tmp/packer-provisioner-ansible-local"
    }
  ]
}

variable.tf

provider "aws" {
  region = "${var.region}"
}
 ~/h/terraform ❯❯❯ more variables.tf
variable "region" {
  default = "ap-northeast-1"
}

variable "ec2_config" {
  default = {
    key_name            = "jkkitakita"
    instance_type       = "t2.micro"
  }
}

variables.json

{
  "scripts_dir": "scripts",
  "ssh_username": "ec2-user",
  "aws_region": "ap-northeast-1",
  "aws_instance_type": "t2.micro",
  "aws_environment": "production",
  "aws_source_ami_id": "ami-########"
}

wordpress.tf

data "aws_ami" "wordpress" {
  filter {
    name = "state"
    values = ["available"]
  }
  filter {
    name = "tag:Release"
    values = ["Latest"] // PackerでAMI作成時につけたタグ
  }
  most_recent = true // 一番新しいものを取得
}

resource "aws_instance" "wordpress" {
  ami           = "${data.aws_ami.wordpress.id}"
  key_name      = "${lookup(var.ec2_config, "key_name")}"
  instance_type = "${lookup(var.ec2_config, "instance_type")}"
  tags {
      "Name" = "${format("wordpress%02d", count.index + 1)}"
  }
}