Building a Basic Ubuntu Image w/ Packer using Device Login

packer_ubuntu.json

{
  "variables": {
    "tenant_id": "{{env `TF_VAR_tenant_id`}}",
    "subscription_id": "{{env `TF_VAR_subscription_id`}}",
    "storage_account": "adronsimagestorage",
    "resource_group_name": "adrons-images"
  },

  "builders": [{
    "type": "azure-arm",

    "tenant_id": "{{user `tenant_id`}}",
    "subscription_id": "{{user `subscription_id`}}",

    "managed_image_resource_group_name": "{{user `resource_group_name`}}",
    "managed_image_name": "base_ubuntu_image",

    "os_type": "Linux",
    "image_publisher": "Canonical",
    "image_offer": "UbuntuServer",
    "image_sku": "16.04-LTS",

    "azure_tags": {
        "dept": "Engineering",
        "task": "Image deployment"
    },

    "location": "westus2",
    "vm_size": "Standard_DS2_v2"
  }],
  "provisioners": [{
    "execute_command": "chmod +x {{ .Path }}; {{ .Vars }} sudo -E sh '{{ .Path }}'",
    "inline": [
      "echo 'does this even work?'"
    ],
    "inline_shebang": "/bin/sh -x",
    "type": "shell"
  }]

}