Comment by avladu for What about the existing Keypair I created via OpenStack Horizon and downloaded .pem with Private kay, Is there any solution to export Private Key from .pem and import into my local Windows computer certificates?

Hello, after all I know, there is no such transformation possible between the keys, and if it exists, it is not implemented in OpenStack or cloudbase-init. I suggest to you using either userdata scripts, either the x509 key type feature in Nova. Thank you, Adrian Vladu.