Using the command line on the engine machine (as root) works fine. I don't use ssh key from the agent GUI but the authentication section (with root user and password),
I think that it's a bug, I manage to migrate with TCP but I just want to let you know.

is it possible to use ssh-key from the agent GUI? how can I get the key?

On Thu, Feb 8, 2018 at 2:51 PM, Petr Kotas <pkotas@redhat.com> wrote:
Hi Maoz,

it looks like cannot connect due to wrong setup of ssh keys. Which linux are you using?
The guide for setting the ssh connection to  libvirt is here: https://wiki.libvirt.org/page/SSHSetup

May it helps?

Petr

On Wed, Feb 7, 2018 at 10:53 PM, maoz zadok <maozza@gmail.com> wrote:
Hello there,

I'm following https://www.ovirt.org/develop/release-management/features/virt/KvmToOvirt/ guide in order to import VMS from Libvirt to oVirt using ssh.
 URL:  "qemu+ssh://host1.example.org/system"

and get the following error:
Failed to communicate with the external provider, see log for additional details.


oVirt agent log:
- Failed to retrieve VMs information from external server qemu+ssh://XXX.XXX.XXX.XXX/system
- VDSM XXX command GetVmsNamesFromExternalProviderVDS failed: Cannot recv data: Host key verification failed.: Connection reset by peer



remote host sshd DEBUG log:
Feb  7 16:38:29 XXX sshd[110005]: Connection from XXX.XXX.XXX.147 port 48148 on XXX.XXX.XXX.123 port 22
Feb  7 16:38:29 XXX sshd[110005]: debug1: Client protocol version 2.0; client software version OpenSSH_7.4
Feb  7 16:38:29 XXX sshd[110005]: debug1: match: OpenSSH_7.4 pat OpenSSH* compat 0x04000000
Feb  7 16:38:29 XXX sshd[110005]: debug1: Local version string SSH-2.0-OpenSSH_7.4
Feb  7 16:38:29 XXX sshd[110005]: debug1: Enabling compatibility mode for protocol 2.0
Feb  7 16:38:29 XXX sshd[110005]: debug1: SELinux support disabled [preauth]
Feb  7 16:38:29 XXX sshd[110005]: debug1: permanently_set_uid: 74/74 [preauth]
Feb  7 16:38:29 XXX sshd[110005]: debug1: list_hostkey_types: ssh-rsa,rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256,ssh-ed25519 [preauth]
Feb  7 16:38:29 XXX sshd[110005]: debug1: SSH2_MSG_KEXINIT sent [preauth]
Feb  7 16:38:29 XXX sshd[110005]: debug1: SSH2_MSG_KEXINIT received [preauth]
Feb  7 16:38:29 XXX sshd[110005]: debug1: kex: algorithm: curve25519-sha256 [preauth]
Feb  7 16:38:29 XXX sshd[110005]: debug1: kex: host key algorithm: ecdsa-sha2-nistp256 [preauth]
Feb  7 16:38:29 XXX sshd[110005]: debug1: kex: client->server cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none [preauth]
Feb  7 16:38:29 XXX sshd[110005]: debug1: kex: server->client cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none [preauth]
Feb  7 16:38:29 XXX sshd[110005]: debug1: kex: curve25519-sha256 need=64 dh_need=64 [preauth]
Feb  7 16:38:29 XXX sshd[110005]: debug1: kex: curve25519-sha256 need=64 dh_need=64 [preauth]
Feb  7 16:38:29 XXX sshd[110005]: debug1: expecting SSH2_MSG_KEX_ECDH_INIT [preauth]
Feb  7 16:38:29 XXX sshd[110005]: debug1: rekey after 134217728 blocks [preauth]
Feb  7 16:38:29 XXX sshd[110005]: debug1: SSH2_MSG_NEWKEYS sent [preauth]
Feb  7 16:38:29 XXX sshd[110005]: debug1: expecting SSH2_MSG_NEWKEYS [preauth]
Feb  7 16:38:29 XXX sshd[110005]: Connection closed by XXX.XXX.XXX.147 port 48148 [preauth]
Feb  7 16:38:29 XXX sshd[110005]: debug1: do_cleanup [preauth]
Feb  7 16:38:29 XXX sshd[110005]: debug1: do_cleanup
Feb  7 16:38:29 XXX sshd[110005]: debug1: Killing privsep child 110006
Feb  7 16:38:29 XXX sshd[109922]: debug1: Forked child 110007.
Feb  7 16:38:29 XXX sshd[110007]: debug1: Set /proc/self/oom_score_adj to 0
Feb  7 16:38:29 XXX sshd[110007]: debug1: rexec start in 5 out 5 newsock 5 pipe 7 sock 8
Feb  7 16:38:29 XXX sshd[110007]: debug1: inetd sockets after dupping: 3, 3
Feb  7 16:38:29 XXX sshd[110007]: Connection from XXX.XXX.XXX.147 port 48150 on XXX.XXX.XXX.123 port 22
Feb  7 16:38:29 XXX sshd[110007]: debug1: Client protocol version 2.0; client software version OpenSSH_7.4
Feb  7 16:38:29 XXX sshd[110007]: debug1: match: OpenSSH_7.4 pat OpenSSH* compat 0x04000000
Feb  7 16:38:29 XXX sshd[110007]: debug1: Local version string SSH-2.0-OpenSSH_7.4
Feb  7 16:38:29 XXX sshd[110007]: debug1: Enabling compatibility mode for protocol 2.0
Feb  7 16:38:29 XXX sshd[110007]: debug1: SELinux support disabled [preauth]
Feb  7 16:38:29 XXX sshd[110007]: debug1: permanently_set_uid: 74/74 [preauth]
Feb  7 16:38:29 XXX sshd[110007]: debug1: list_hostkey_types: ssh-rsa,rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256,ssh-ed25519 [preauth]
Feb  7 16:38:29 XXX sshd[110007]: debug1: SSH2_MSG_KEXINIT sent [preauth]
Feb  7 16:38:29 XXX sshd[110007]: debug1: SSH2_MSG_KEXINIT received [preauth]
Feb  7 16:38:29 XXX sshd[110007]: debug1: kex: algorithm: curve25519-sha256 [preauth]
Feb  7 16:38:29 XXX sshd[110007]: debug1: kex: host key algorithm: ecdsa-sha2-nistp256 [preauth]
Feb  7 16:38:29 XXX sshd[110007]: debug1: kex: client->server cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none [preauth]
Feb  7 16:38:29 XXX sshd[110007]: debug1: kex: server->client cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none [preauth]
Feb  7 16:38:29 XXX sshd[110007]: debug1: kex: curve25519-sha256 need=64 dh_need=64 [preauth]
Feb  7 16:38:29 XXX sshd[110007]: debug1: kex: curve25519-sha256 need=64 dh_need=64 [preauth]
Feb  7 16:38:29 XXX sshd[110007]: debug1: expecting SSH2_MSG_KEX_ECDH_INIT [preauth]
Feb  7 16:38:29 XXX sshd[110007]: debug1: rekey after 134217728 blocks [preauth]
Feb  7 16:38:29 XXX sshd[110007]: debug1: SSH2_MSG_NEWKEYS sent [preauth]
Feb  7 16:38:29 XXX sshd[110007]: debug1: expecting SSH2_MSG_NEWKEYS [preauth]
Feb  7 16:38:29 XXX sshd[110007]: Connection closed by XXX.XXX.XXX.147 port 48150 [preauth]
Feb  7 16:38:29 XXX sshd[110007]: debug1: do_cleanup [preauth]
Feb  7 16:38:29 XXX sshd[110007]: debug1: do_cleanup
Feb  7 16:38:29 XXX sshd[110007]: debug1: Killing privsep child 110008
Feb  7 16:38:30 XXX sshd[109922]: debug1: Forked child 110009.
Feb  7 16:38:30 XXX sshd[110009]: debug1: Set /proc/self/oom_score_adj to 0
Feb  7 16:38:30 XXX sshd[110009]: debug1: rexec start in 5 out 5 newsock 5 pipe 7 sock 8
Feb  7 16:38:30 XXX sshd[110009]: debug1: inetd sockets after dupping: 3, 3
Feb  7 16:38:30 XXX sshd[110009]: Connection from XXX.XXX.XXX.147 port 48152 on XXX.XXX.XXX.123 port 22
Feb  7 16:38:30 XXX sshd[110009]: debug1: Client protocol version 2.0; client software version OpenSSH_7.4
Feb  7 16:38:30 XXX sshd[110009]: debug1: match: OpenSSH_7.4 pat OpenSSH* compat 0x04000000
Feb  7 16:38:30 XXX sshd[110009]: debug1: Local version string SSH-2.0-OpenSSH_7.4
Feb  7 16:38:30 XXX sshd[110009]: debug1: Enabling compatibility mode for protocol 2.0
Feb  7 16:38:30 XXX sshd[110009]: debug1: SELinux support disabled [preauth]
Feb  7 16:38:30 XXX sshd[110009]: debug1: permanently_set_uid: 74/74 [preauth]
Feb  7 16:38:30 XXX sshd[110009]: debug1: list_hostkey_types: ssh-rsa,rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256,ssh-ed25519 [preauth]
Feb  7 16:38:30 XXX sshd[110009]: debug1: SSH2_MSG_KEXINIT sent [preauth]
Feb  7 16:38:30 XXX sshd[110009]: debug1: SSH2_MSG_KEXINIT received [preauth]
Feb  7 16:38:30 XXX sshd[110009]: debug1: kex: algorithm: curve25519-sha256 [preauth]
Feb  7 16:38:30 XXX sshd[110009]: debug1: kex: host key algorithm: ecdsa-sha2-nistp256 [preauth]
Feb  7 16:38:30 XXX sshd[110009]: debug1: kex: client->server cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none [preauth]
Feb  7 16:38:30 XXX sshd[110009]: debug1: kex: server->client cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none [preauth]
Feb  7 16:38:30 XXX sshd[110009]: debug1: kex: curve25519-sha256 need=64 dh_need=64 [preauth]
Feb  7 16:38:30 XXX sshd[110009]: debug1: kex: curve25519-sha256 need=64 dh_need=64 [preauth]
Feb  7 16:38:30 XXX sshd[110009]: debug1: expecting SSH2_MSG_KEX_ECDH_INIT [preauth]
Feb  7 16:38:30 XXX sshd[110009]: debug1: rekey after 134217728 blocks [preauth]
Feb  7 16:38:30 XXX sshd[110009]: debug1: SSH2_MSG_NEWKEYS sent [preauth]
Feb  7 16:38:30 XXX sshd[110009]: debug1: expecting SSH2_MSG_NEWKEYS [preauth]
Feb  7 16:38:30 XXX sshd[110009]: Connection closed by XXX.XXX.XXX.147 port 48152 [preauth]
Feb  7 16:38:30 XXX sshd[110009]: debug1: do_cleanup [preauth]
Feb  7 16:38:30 XXX sshd[110009]: debug1: do_cleanup
Feb  7 16:38:30 XXX sshd[110009]: debug1: Killing privsep child 110010
Feb  7 16:38:30 XXX sshd[109922]: debug1: Forked child 110011.
Feb  7 16:38:30 XXX sshd[110011]: debug1: Set /proc/self/oom_score_adj to 0
Feb  7 16:38:30 XXX sshd[110011]: debug1: rexec start in 5 out 5 newsock 5 pipe 7 sock 8
Feb  7 16:38:30 XXX sshd[110011]: debug1: inetd sockets after dupping: 3, 3
Feb  7 16:38:30 XXX sshd[110011]: Connection from XXX.XXX.XXX.147 port 48154 on XXX.XXX.XXX.123 port 22
Feb  7 16:38:30 XXX sshd[110011]: debug1: Client protocol version 2.0; client software version OpenSSH_7.4
Feb  7 16:38:30 XXX sshd[110011]: debug1: match: OpenSSH_7.4 pat OpenSSH* compat 0x04000000
Feb  7 16:38:30 XXX sshd[110011]: debug1: Local version string SSH-2.0-OpenSSH_7.4
Feb  7 16:38:30 XXX sshd[110011]: debug1: Enabling compatibility mode for protocol 2.0
Feb  7 16:38:30 XXX sshd[110011]: debug1: SELinux support disabled [preauth]
Feb  7 16:38:30 XXX sshd[110011]: debug1: permanently_set_uid: 74/74 [preauth]
Feb  7 16:38:30 XXX sshd[110011]: debug1: list_hostkey_types: ssh-rsa,rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256,ssh-ed25519 [preauth]
Feb  7 16:38:30 XXX sshd[110011]: debug1: SSH2_MSG_KEXINIT sent [preauth]
Feb  7 16:38:30 XXX sshd[110011]: debug1: SSH2_MSG_KEXINIT received [preauth]
Feb  7 16:38:30 XXX sshd[110011]: debug1: kex: algorithm: curve25519-sha256 [preauth]
Feb  7 16:38:30 XXX sshd[110011]: debug1: kex: host key algorithm: ecdsa-sha2-nistp256 [preauth]
Feb  7 16:38:30 XXX sshd[110011]: debug1: kex: client->server cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none [preauth]
Feb  7 16:38:30 XXX sshd[110011]: debug1: kex: server->client cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none [preauth]
Feb  7 16:38:30 XXX sshd[110011]: debug1: kex: curve25519-sha256 need=64 dh_need=64 [preauth]
Feb  7 16:38:30 XXX sshd[110011]: debug1: kex: curve25519-sha256 need=64 dh_need=64 [preauth]
Feb  7 16:38:30 XXX sshd[110011]: debug1: expecting SSH2_MSG_KEX_ECDH_INIT [preauth]
Feb  7 16:38:30 XXX sshd[110011]: debug1: rekey after 134217728 blocks [preauth]
Feb  7 16:38:30 XXX sshd[110011]: debug1: SSH2_MSG_NEWKEYS sent [preauth]
Feb  7 16:38:30 XXX sshd[110011]: debug1: expecting SSH2_MSG_NEWKEYS [preauth]
Feb  7 16:38:30 XXX sshd[110011]: Connection closed by XXX.XXX.XXX.147 port 48154 [preauth]


Thank you!

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