Permission denied when ed25519 keys are used for Red Hat CoreOS nodes

Issue

• We are using ed25519 keys during an OpenShift installation and generating keys using:

  $ ssh-keygen -t ed25519 -N '' -f <path> 
  

• The bootstrap.ign includes the public key but once the node finishes booting up, there is a permission denied message while accessing the node:

  ssh core@x.x.x.x
  core@x.x.x.x: Permission denied (publickey,gssapi-keyex,gssapi-with-mic).