How to use CoreOS Image for OpenNebula

opennebula5.4.6
Centos7.4(kvm)
packer1.2.3

I downloaded it from apps and tried to use coreos an error occurred.

Then an error occurred when trying to create an image manually using packer.
Please let me know if you know how to solve it.

I made an image with reference to this.

2018/05/07 15:45:35 packer: 2018/05/07 15:45:35 [DEBUG] handshaking with SSH
2018/05/07 15:45:35 packer: 2018/05/07 15:45:35 [ERROR] handshake error: ssh: handshake failed: ssh: unable to authenticate, attempted methods [none password keyboard-interactive], no supported methods remain
2018/05/07 15:45:35 packer: 2018/05/07 15:45:35 [DEBUG] SSH handshake err: ssh: handshake failed: ssh: unable to authenticate, attempted methods [none password keyboard-interactive], no supported methods remain
2018/05/07 15:45:35 packer: 2018/05/07 15:45:35 [DEBUG] Detected authentication error. Increasing handshake attempts.
2018/05/07 15:45:42 packer: 2018/05/07 15:45:42 [INFO] Attempting SSH connection…
2018/05/07 15:45:42 packer: 2018/05/07 15:45:42 [DEBUG] reconnecting to TCP connection for SSH
2018/05/07 15:45:42 packer: 2018/05/07 15:45:42 [DEBUG] handshaking with SSH
2018/05/07 15:45:42 packer: 2018/05/07 15:45:42 [ERROR] handshake error: ssh: handshake failed: ssh: unable to authenticate, attempted methods [none password keyboard-interactive], no supported methods remain
2018/05/07 15:45:42 packer: 2018/05/07 15:45:42 [DEBUG] SSH handshake err: ssh: handshake failed: ssh: unable to authenticate, attempted methods [none password keyboard-interactive], no supported methods remain
2018/05/07 15:45:42 packer: 2018/05/07 15:45:42 [DEBUG] Detected authentication error. Increasing handshake attempts.
2018/05/07 15:45:42 ui error: ==> qemu: Error waiting for SSH: ssh: handshake failed: ssh: unable to authenticate, attempted methods [none password keyboard-interactive], no supported methods remain
==> qemu: Error waiting for SSH: ssh: handshake failed: ssh: unable to authenticate, attempted methods [none password keyboard-interactive], no supported methods remain
2018/05/07 15:45:42 ui: ==> qemu: Deleting output directory…
==> qemu: Deleting output directory…
2018/05/07 15:45:42 [INFO] (telemetry) ending qemu
2018/05/07 15:45:42 ui error: Build ‘qemu’ errored: ssh: handshake failed: ssh: unable to authenticate, attempted methods [none password keyboard-interactive], no supported methods remain
2018/05/07 15:45:42 Builds completed. Waiting on interrupt barrier…
2018/05/07 15:45:42 machine readable: error-count []string{“1”}
2018/05/07 15:45:42 ui error:
==> Some builds didn’t complete successfully and had errors:
2018/05/07 15:45:42 machine readable: qemu,error []string{“ssh: handshake failed: ssh: unable to authenticate, attempted methods [none password keyboard-interactive], no supported methods remain”}
2018/05/07 15:45:42 ui error: --> qemu: ssh: handshake failed: ssh: unable to authenticate, attempted methods [none password keyboard-interactive], no supported methods remain
2018/05/07 15:45:42 ui:
==> Builds finished but no artifacts were created.
2018/05/07 15:45:42 [INFO] (telemetry) Finalizing.
Build ‘qemu’ errored: ssh: handshake failed: ssh: unable to authenticate, attempted methods [none password keyboard-interactive], no supported methods remain
==> Some builds didn’t complete successfully and had errors:
–> qemu: ssh: handshake failed: ssh: unable to authenticate, attempted methods [none password keyboard-interactive], no supported methods remain
==> Builds finished but no artifacts were created.
2018/05/07 15:45:43 waiting for all plugin processes to complete…
2018/05/07 15:45:43 /opt/packer/packer: plugin process exited