Description of problem:
This is an RFE to check for accepted host keys before going through ~60 minutes of installation and configuration before hanging indefinitely with no feedback to the user.  The cockpit installer simply hangs forever at "TASK [Set Engine public key as authorized key without validating the TLS/SSL certificates]" 

Root-cause is that cockpit wizard asks for FQDN/IP of target RHV hosts (ovirtmgmt interface), but doesn't check if those values are present in /root/.ssh/known_hosts


Version-Release number of selected component (if applicable):
Applicable to RHHI 1.5 and RHV 4.2.7


How reproducible:
Ignore chapter 5 of the Deployment Guide.


Actual results:
Cockpit wizard hangs forever with no feedback at "TASK [Set Engine public key as authorized key without validating the TLS/SSL certificates]"


Expected results:
Cockpit wizard (ansible task) should check for host keys early, and fail if not present in /root/.ssh/known_hosts (e.g. https://docs.ansible.com/ansible/2.5/modules/known_hosts_module.html)

Alternatively, the task could be modified to include "ansible_ssh_extra_args: -o StrictHostKeyChecking=no"


Additional info:
See full thread on rhev-tech at http://post-office.corp.redhat.com/archives/rhev-tech/2018-November/msg00071.html

---------- Forwarded message ---------
From: Gobinda Das
Date: Tue, Nov 13, 2018 at 4:32 AM
Subject: Re: [rhev-tech] RHHI 1.5 / RHV 4.2.7 deployment hung at task "Set Engine public key..."
To: Doron Fediuck

Hi Doron,
Yes you are right it should not hung instead giving some message or time out
I will work on it.

On Tue, Nov 13, 2018 at 4:28 PM Doron Fediuck wrote:
Thanks Gobinda.
Sounds like a bug in the sense that we cannot have installation hung for whatever reason;
Either verify the inputs before running or fail. Am I missing something?

On Tue, 13 Nov 2018 at 09:51, Gobinda Das wrote:
If TASK [Set Engine public key as authorized key without
validating the TLS/SSL certificates] issue came after HE deployment then it's for auto add hosts.
This comes when you have not configured password less ssh for fqdn or ip which needs to be auto added.
In this case rhhi2.home.lab and rhhi3.home.lab needs to be configured from first host.


On Tue, Nov 13, 2018, 07:06 John Call <jcall wrote:
Hi rhev-tech,
I tried to install a fresh RHHI 1.5 / RHV 4.2.7 today, but my deployment is hung indefinitely (at least 3 hours now w/out error or progress) on the TASK [Set Engine public key as authorized key without validating the TLS/SSL certificates]

Could this be caused by not having pre-populated the SSH host keys?  Before going through the hosted-engine wizard I created an ssh key and pushed it to the IP addresses (192.168.255.10x) that run the Gluster service, but not to the FQDN/IP address (192.168.0.10x) of the future ovirtmgmt interfaces.

Thanks in advance, John Call.
******************************************
[root@rhhi1 ~]# ip -4 a s 
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
4: enp12s0f1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    inet 192.168.255.105/24 brd 192.168.255.255 scope global noprefixroute enp12s0f1
       valid_lft forever preferred_lft forever
20: virbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    inet 192.168.124.1/24 brd 192.168.124.255 scope global virbr0
       valid_lft forever preferred_lft forever
26: ovirtmgmt: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    inet 192.168.0.105/24 brd 192.168.0.255 scope global ovirtmgmt
       valid_lft forever preferred_lft forever


[root@rhhi1 ~]# dig +short -x 192.168.0.105
rhhi1.home.lab.


[root@rhhi1 ~]# cat /root/.ssh/known_hosts
192.168.255.105 ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBNGRfEWIQkQB/6H+DMozKvZoh7avvaRgJG4RadXTGcmlnahmtY11yiWfVFyT2pwdVyMRuCxl0Mteo60lEUWltCM=
192.168.255.106 ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBPXBaMsBUAXGlMRN4I8BHKEOT0a2Jevtki6CnYgPGTaVAHmDb4S5D39H01h7tMesUf6U1/PERM80N8/XxyeixOo=
192.168.255.107 ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBPDwIq9MRHRaqWHVjjnX+amDQ02LHJQ57BRSkl802nBXzujugpFWnwhKXxJwiU9WmWAG/o+w/m7UUMBs8CXm3C0=
###
### only Gluster IPs here, no host keys present for future ovirtmgmt FQDN/IP
###