{
  "variables": {
    "access_key": "{{env `ALICLOUD_ACCESS_KEY`}}",
    "secret_key": "{{env `ALICLOUD_SECRET_KEY`}}"
  },
  "builders": [{
    "type":"alicloud-ecs",
    "access_key":"{{user `access_key`}}",
    "secret_key":"{{user `secret_key`}}",
    "region":"cn-beijing",
    "image_name":"packer_with_data_disk",
    "source_image":"centos_7_2_64_40G_base_20170222.vhd",
    "ssh_username":"root",
    "instance_type":"ecs.n1.tiny",
    "io_optimized":"true",
    "image_disk_mappings":[{"disk_name":"data1","disk_size":20},{"disk_name":"data1","disk_size":20,"disk_device":"/dev/xvdz"}]
  }],
  "provisioners": [{
    "type": "shell",
    "inline": [
      "sleep 30",
      "yum install redis.x86_64 -y"
    ]
  }]
}