Comment 9 for bug 1661328

There seems to be a check in ironic that does the validation that the memory is larger than the image_size + reserved space. For our ironic installation, we used the patch [2] and additionally, we needed a patch to disable the image size check.

I will try to write a spec to propose the improvement properly.

[1] https://github.com/openstack/ironic/blob/master/ironic/drivers/modules/agent.py#L98
[2] https://review.openstack.org/#/c/430442/