The problem here is that REST API POST request creating ssh-keypair to
access nova servers doesn’t write to disk rsa private key and only upload
public one to nova. Closing Chrome Client results loosing rsa private key.
To prevent failure to write to disk private key , save response-export.json as shown bellow. Working via CLI ( invoking curl ) doesn’t write private rsa key to disk as well.
Complete text may be seen here http://bderzhavets.blogspot.com/2016/05/creating-functional-ssh-keypair-on-rdo.html