If you're getting an error or having difficulty creating and using the SSH keypairs with OpenStack - you can follow these instructions:
Create a Keypair
1. Go to 'Access & Security'
2. Open the 'Keypairs' tab
3. Click on the Create Keypair button
4. Choose a Keypair name
5. You will only be able to download it once, therefore, make sure you save it as .pem file and remember where it was saved.