{
  "builders": [
    {
      "type": "jdcloud",
      "image_id": "<your-base-image-id>",
      "access_key": "<your-access-key>",
      "secret_key": "<your-secret-key>",
      "region_id": "cn-north-1",
      "az": "cn-north-1c",
      "instance_name": "created_by_packer",
      "instance_type": "g.n2.medium",

      "ssh_private_key_file":"/Path/to/your/.ssh/id_rsa",
      "ssh_keypair_name":"packer_keys",

      "image_name": "created_by_packer",
      "subnet_id": "<your-subnet>",
      "communicator":"ssh",
      "ssh_username": "root",
      "ssh_timeout" : "60s"
    }
  ],

  "provisioners": [
    {
      "type": "shell",
      "inline": [
        "sleep 3",
        "echo 123",
        "pwd"
      ]
    }
  ]
}