centos7-base-chroot.json

{
  "description": "AMI Builder for CentOS 7",
  "variables": {
    "aws_access_key": "",
    "aws_secret_key": "",
    "region": "us-east-1",
    "project_name": "c7build",
    "build_stage": "base",
    "os_name": "centos",
    "os_version": "7",
    "root_device_size": "8",
    "fs_type": "xfs",
    "repo_baseurl": "mirror.centos.org",
    "rpm_release_file": "centos-release-7-3.1611.el7.centos.x86_64.rpm"
  },

  "provisioners": [
    {
      "type": "file",
      "source": "files/common/10-growpart.cfg",
      "destination": "/tmp/10-growpart.cfg"
    },
    {
      "type": "file",
      "source": "files/{{user `os_name`}}{{user `os_version`}}/cloud.cfg",
      "destination": "/tmp/cloud.cfg"
    },
    {
      "type": "shell",
      "environment_vars": [
        "FS_TYPE={{user `fs_type`}}"
      ],
      "scripts": [
        "scripts/{{user `os_name`}}{{user `os_version`}}/10-packages.sh",
        "scripts/{{user `os_name`}}{{user `os_version`}}/20-config.sh",
        "scripts/{{user `os_name`}}{{user `os_version`}}/30-services.sh",
        "scripts/{{user `os_name`}}{{user `os_version`}}/40-network.sh",
        "scripts/{{user `os_name`}}{{user `os_version`}}/50-cloud-init.sh",
        "scripts/{{user `os_name`}}{{user `os_version`}}/60-grub.sh",
        "scripts/{{user `os_name`}}{{user `os_version`}}/70-users.sh",
        "scripts/{{user `os_name`}}{{user `os_version`}}/80-cleanup.sh"
      ]
    }
  ],

  "builders": [
    {
      "type": "amazon-chroot",
      "access_key": "{{user `aws_access_key`}}",
      "secret_key": "{{user `aws_secret_key`}}",
      "ami_name": "{{user `os_name`}}-{{user `os_version`}}-{{user `build_stage`}}-{{isotime \"2006-01-02-030405\" | clean_ami_name}}",
      "ami_description": "{{user `os_name`}} {{user `os_version`}} {{user `build_stage`}} image built on {{isotime \"2006-01-02\"}}",
      "from_scratch": true,
      "ami_virtualization_type": "hvm",
      "pre_mount_commands": [
        "echo 'Make sure gdisk is installed on builder'",
        "yum -y install gdisk",
        "echo 'Partition device'",
        "sgdisk -og {{.Device}}",
        "sgdisk -n 1:4096:0 -c 1:\"Linux\" -t 1:8300 {{.Device}}",
        "sgdisk -n 128:2048:4095 -c 128:\"BIOS Boot Partition\" -t 128:ef02 {{.Device}}",
        "echo 'Create desired filesystem on device'",
        "mkfs.{{user `fs_type`}} -L root {{.Device}}1",
        "sync"
      ],
      "post_mount_commands": [
        "echo 'RPM initial setup'",
        "rpm --root={{.MountPath}} --initdb",
        "echo 'Install base OS release RPM to lay down the basics in chroot'",
        "rpm --root={{.MountPath}} -ivh http://{{user `repo_baseurl`}}/{{user `os_name`}}/{{user `os_version`}}/os/x86_64/Packages/{{user `rpm_release_file`}}",
        "echo 'Make sure yum and deltarpm are installed'",
        "yum --installroot={{.MountPath}} -y install yum deltarpm",
        "echo 'Write out variable for use by provisioning scripts'",
        "echo 'DEVICE={{.Device}}' > {{.MountPath}}/tmp/env_vars"
      ],
      "root_volume_size": "{{user `root_device_size`}}",
      "root_device_name": "/dev/xvda",
      "ami_block_device_mappings": [
        {
          "device_name": "/dev/xvda",
          "delete_on_termination": true,
          "volume_type": "gp2"
        }
      ],
      "copy_files": ["/etc/resolv.conf"],
      "tags": {
        "buildStage": "{{user `build_stage`}}",
        "buildDate": "{{isotime \"2006-01-02\"}}",
        "os": "{{user `os_name`}}",
        "version": "{{user `os_version`}}"
      }
    }
  ]
}