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OpenStack SDK - How to create image with Kernel id and Ramdisk parameters?

I've been trying to create an OpenStack image informing the Kernel Id and Ramdisk Id, using the OpenStack Unified SDK (, but without success. I know this is possible, because the OpenStack CLI have this parameters, as shown on this page (, where the CLI have the "--kernel-id" and "--ramdisk-id" parameters. I've used this parameter in the terminal and confirmed they work, but I need to use them in python.

I'm trying to use the upload_method, as described here but I can't get the attrs parameter right. Documentation only say it is suposed to be a dictionary. Here is the code I'm using

    atrib = {
        'properties': {
            'kernel_id': 'd84e1f2b-8d8c-4a4a-8858-77a8d5a93cb1',
            'ramdisk_id': 'cfef18e0-006e-477a-a098-593d43435a1e'
    with open(file) as fimage:
    image = image_service.upload_image(

And here is the error I'm getting:

  File "", line 121, in main
  File "/usr/lib/python2.7/site-packages/openstack/image/v2/", line 51, in upload_image
  File "/usr/lib/python2.7/site-packages/openstack/", line 193, in _create
    return res.create(self.session)
  File "/usr/lib/python2.7/site-packages/openstack/", line 570, in create
    json=request.body, headers=request.headers)
  File "/usr/lib/python2.7/site-packages/keystoneauth1/", line 675, in post
    return self.request(url, 'POST', **kwargs)
  File "/usr/lib/python2.7/site-packages/openstack/", line 52, in map_exceptions_wrapper
    http_status=e.http_status, cause=e)
openstack.exceptions.HttpException: HttpException: Bad Request, 400 Bad Request

Provided object does not match schema 'image': {u'kernel_id': u'd84e1f2b-8d8c-4a4a-8858-77a8d5a93cb1', u'ramdisk_id': u'cfef18e0-006e-477a-a098-593d43435a1e'} is not of type 'string'  Failed validating 'type' in schema['additionalProperties']:     {'type': 'string'}  On instance[u'properties']:     {u'kernel_id': u'd84e1f2b-8d8c-4a4a-8858-77a8d5a93cb1',      u'ramdisk_id': u'cfef18e0-006e-477a-a098-593d43435a1e'}

Already tried to use the update_image method, but without success, passing kernel id and ramdisk id as a strings creates the instance, but it does not boot. Does anyone knows how to solve this?