Arvados

The incompatibility is with the ec2 driver specifically. This func in source:lib/cloud/ec2/ec2.go only supports rsa keys:

func awsKeyFingerprint(pk ssh.PublicKey) (md5fp string, sha1fp string, err error) {
        // AWS key fingerprints don't use the usual key fingerprint
        // you get from ssh-keygen or ssh.FingerprintLegacyMD5()
        // (you can get that from md5.Sum(pk.Marshal())
        //
        // AWS uses the md5 or sha1 of the PKIX DER encoding of the
        // public key, so calculate those fingerprints here.

22935-ssh-key-type @ c3582ad1988afa6aaf122b5caea9345269fec6ac -- developer-run-tests: #4792

• All agreed upon points are implemented / addressed. Describe changes from pre-implementation design.
  • ✅ Confirm other key types can be loaded from config file
  • ✅ Add support for ED25519 keys in EC2 driver for dispatchcloud
• Anything not implemented (discovered or discussed during work) has a follow-up story.
  • n/a
• Code is tested and passing, both automated and manual, what manual testing was done is described.
  • ✅ Test case compares fingerprints to openssl tools as described in AWS docs
• New or changed UX/UX and has gotten feedback from stakeholders.
  • n/a
• Documentation has been updated.
  • ✅ Noted in documentation that EC2 itself only supports RSA and ED25519 keys
• Behaves appropriately at the intended scale (describe intended scale).
  • ✅
• Considered backwards and forwards compatibility issues between client and server.
  • ✅
• Follows our coding standards and GUI style guidelines.
  • ✅

Applied in changeset arvados|b6bcc0b604e5afdc29afbeeab9696276b473cf62.