[ovirt-users] Error during hosted-engine-setup for 3.5.1 on F20 (Cannot add the host to cluster ... SSH has failed)

[Bob Doolittle]

On 03/09/2015 07:12 AM, Simone Tiraboschi wrote:
>
> ----- Original Message -----
>> From: "Bob Doolittle" <bob at doolittle.us.com>
>> To: "Simone Tiraboschi" <stirabos at redhat.com>
>> Sent: Monday, March 9, 2015 12:02:49 PM
>> Subject: Re: [ovirt-users] Error during hosted-engine-setup for 3.5.1 on F20 (Cannot add the host to cluster ... SSH
>> has failed)
>>
>> On Mar 9, 2015 5:23 AM, "Simone Tiraboschi" <stirabos at redhat.com> wrote:
>>>
>>>
>>> ----- Original Message -----
>>>> From: "Bob Doolittle" <bob at doolittle.us.com>
>>>> To: "users-ovirt" <users at ovirt.org>
>>>> Sent: Friday, March 6, 2015 9:21:20 PM
>>>> Subject: [ovirt-users] Error during hosted-engine-setup for 3.5.1 on
>> F20 (Cannot add the host to cluster ... SSH has
>>>> failed)
>>>>
>>>> Hi,
>>>>
>>>> I'm following the instructions here:
>> http://www.ovirt.org/Hosted_Engine_Howto
>>>> My self-hosted install failed near the end:
>>>>
>>>> To continue make a selection from the options below:
>>>>           (1) Continue setup - engine installation is complete
>>>>           (2) Power off and restart the VM
>>>>           (3) Abort setup
>>>>           (4) Destroy VM and abort setup
>>>>
>>>>           (1, 2, 3, 4)[1]: 1
>>>> [ INFO  ] Engine replied: DB Up!Welcome to Health Status!
>>>>           Enter the name of the cluster to which you want to add the
>> host
>>>>           (Default) [Default]:
>>>> [ ERROR ] Cannot automatically add the host to cluster Default: Cannot
>> add
>>>> Host. Connecting to host via SSH has failed, verify that the host is
>>>> reachable (IP address, routable address etc.) You may refer to the
>>>> engine.log file for further details.
>>>> [ ERROR ] Failed to execute stage 'Closing up': Cannot add the host to
>>>> cluster Default
>>>> [ INFO  ] Stage: Clean up
>>>> [ INFO  ] Generating answer file
>>>> '/var/lib/ovirt-hosted-engine-setup/answers/answers-20150306135624.conf'
>>>> [ INFO  ] Stage: Pre-termination
>>>> [ INFO  ] Stage: Termination
>>>>
>>>> I can ssh into the engine VM both locally and remotely. There is no
>>>> /root/.ssh directory, however. Did I need to set that up somehow?
>>> It's the engine that needs to open an SSH connection to the host calling
>> it by its hostname.
>>> So please be sure that you can SSH to the host from the engine using its
>> hostname and not its IP address.
>>
>> I'm assuming this should be a password-less login (key-based
>> authentication?). 
> Yes, it is.
>
>> As what user?
> root

OK, I see a couple of problems.
First off, I didn't have my deploying-host hostname in the hosts map for my engine.
After adding it to /etc/hosts (both hostname and FQDN), when I try to ssh from root at engine to root at host it is prompting me for a password.

On my engine, ~root/.ssh does not contain any keys.
On my host, ~root/.ssh has authorized_keys, and in it there is a key with the comment "ovirt-engine".

It's possible that I inadvertently removed ~root/.ssh on engine while I was preparing the engine (I started to set up my own no-password logins and then thought better and cleaned up, not realizing that some prior setup affecting that directory had occurred). That would explain the second issue.

How/when does the key for root at engine get populated to the host's ~root/.ssh/authenticated_keys during setup?

-Bob

>
>> -Bob
>>
>>> Till hosted-engine hosts were simply identified by their IP address but
>> than we had some bug report on side effects of that.
>>> So now we generate and sign certs using host hostnames and so the engine
>> should be able to correctly resolve them.
>>>> When I log into the Administration portal, the engine VM does not appear
>>>> under the Virtual machine view (it's empty).
>>> It's cause the setup didn't complete.
>>>
>>>> I've attached what I think are the relevant logs.
>>>>
>>>> Also, when my host reboots, the ovirt-ha-broker and ovirt-ha-agent
>> services
>>>> do not come up automatically. I have to use systemctl to start them
>>>> manually.
>>> It's cause the setup didn't complete.
>>>
>>>> This is a fresh Fedora 20 machine installing a fresh copy of Ovirt
>> 3.5.1.
>>>> What's the cleanest approach to restore/complete sanity of my setup
>> please?
>>> First step is to clarify what went wrong in order to avoid it in the
>> future.
>>> Than, if you want a really sanity environment for production use I'd
>> suggest to redeploy.
>>> So
>>>  hosted-engine --vm-poweroff
>>> empty the storage domain share and deploy again
>>>
>>>> Thanks,
>>>> Bob
>>>>
>>>>
>>>> I've linked 3 files to this email:
>>>> server.log (12.4 MB) Dropbox https://db.tt/g5p09AaD
>>>> vdsm.log (3.2 MB) Dropbox https://db.tt/P4572SUm
>>>> ovirt-hosted-engine-setup-20150306123622-tad1fy.log (413 KB) Dropbox
>>>> https://db.tt/XAM9ffhi
>>>> Mozilla Thunderbird makes it easy to share large files over email.
>>>>
>>>>
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>>>>