How to upload OpenStack Ubuntu Cloud images to AWS EC2?

Question

Context: Within my OpenStack environment, I'm operating virtual machines instantiated from a Ubuntu Cloud Image (QCOW2 format). Now, I want to create snapshots of these virtual machine and operate them within an AWS EC2 environment.

Question: Which steps do I have to execute for that? Please also be precise where to execute any commands (e.g., within a virtual instance, at the OpenStack controller node, etc.).

Notes about related posts:

• Is it possible to create an ami from an openstack image? seems to lack information about how to come to an AMI as requested by Amazon.
• How do I set up cloud-init on custom AMIs in AWS? (CentOS) May be obsolete as I use an Ubuntu Cloud Image?!
• http://lucasdipaola.blogspot.de/2014/04/importing-openstack-image-into-amazon.html seems to be out-dated and partly also unnecessary for Ubuntu Cloud Images.

Answer 1

Images have to be converted to an EC2-compliant format. QCOW2 is such a format and converting existing images to QCOW2 is possible. However, such a conversion does not work for large image files (> 10 GB). Therefore, uploading OpenStack images to EC2 is only possible with high limitations. See my comments above for details.