After belatedly realising that no engine for EL7 is planned for 3.5 I tried using FC20:

I used a database called engine with user engine on the VM to restore to. 
The engine-backup restore appeared to complete with no errors save the canonical complaint about less that 16GB of memory being available.  However on completion the host the hosted-engine-deploy threw this error:

Failed to execute stage 'Closing up': The host name "ovirt-admin-hosted.xxxxx.xxx.edu" contained in the URL doesn't match any of the names in the server certificate.

from the setup log 
2014-10-27 12:55:49 DEBUG otopi.ovirt_hosted_engine_setup.check_liveliness check_liveliness.isEngineUp:46 Checking for Engine health status
2014-10-27 12:55:50 INFO otopi.ovirt_hosted_engine_setup.check_liveliness check_liveliness.isEngineUp:64 Engine replied: DB Up!Welcome to Health Status!
2014-10-27 12:55:50 DEBUG otopi.context context._executeMethod:138 Stage closeup METHOD otopi.plugins.ovirt_hosted_engine_setup.engine.add_host.Plugin._closeup
2014-10-27 12:55:50 DEBUG otopi.plugins.ovirt_hosted_engine_setup.engine.add_host add_host._getPKICert:89 Acquiring ca.crt from the engine
2014-10-27 12:55:50 DEBUG otopi.plugins.ovirt_hosted_engine_setup.engine.add_host add_host._getPKICert:101 -----BEGIN CERTIFICATE-----
MIID3DCCAsSgAwIBAgICEAAwDQYJKoZIhvcNAQEFBQAwTzELMAkGA1UEBhMCVVMxFjAUBgNVBAoT
DXZzbmV0LmdtdS5lZHUxKDAmBgNVBAMTH292aXJ0LWFkbWluLnZzbmV0LmdtdS5lZHUuNzIyNDcw
IhcRMTMxMTExMTk1NTQ1KzAwMDAXDTIzMTExMDE5NTU0NVowTzELMAkGA1UEBhMCVVMxFjAUBgNV
BAoTDXZzbmV0LmdtdS5lZHUxKDAmBgNVBAMTH292aXJ0LWFkbWluLnZzbmV0LmdtdS5lZHUuNzIy
NDcwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQDAzjsdTOPIhruA/TvupQ+syMdVu8GT
VJ9IlFdqc/RhiV9YB6snYAF6MIeWKnW0eOL9jY/5TmfIqY/+rvYvLhPui1/612KoW9kEcZXUw0k-2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-----END CERTIFICATE-----
2014-10-27 12:55:50 DEBUG otopi.plugins.ovirt_hosted_engine_setup.engine.add_host add_host._getSSHkey:111 Acquiring SSH key from the engine
2014-10-27 12:55:50 DEBUG otopi.plugins.ovirt_hosted_engine_setup.engine.add_host add_host._getSSHkey:123 ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCpmyaDlP8Kt/yDb/kB4OaIdPx2sgH8T5Ra6hBRGHMxnTtykajnDj9WMannNc0F3d0htvVQXPKZYxxsXxNeHq00Ga/agnCjsYM9EjzujdsBqvyOTjlVX3BVWhWGZu5yNxYwpvdQBRCzhHibgqaafWNRvaixUeO1VAlU+q5W4bZDxJwKui+Bf1dLuZw94zHKs3jiGFcQOegJUVYmWuLVh5GH6SNLMLdbJdr4B5MwlK8ItiOC9XgUdH0RxN56Y1PEUkLserNOW/FxsXuf+cbWRsMtVa5xj82AlDWQUjyQleC91Nl7FT3OHGU1nJf289EjzujdsBqvyOTjlVX3BV5 ovirt-engine
2014-10-27 12:55:50 DEBUG otopi.transaction transaction._prepare:77 preparing 'File transaction for '/root/.ssh/authorized_keys''
2014-10-27 12:55:50 DEBUG otopi.filetransaction filetransaction.prepare:194 file '/root/.ssh/authorized_keys' missing
2014-10-27 12:55:50 DEBUG otopi.transaction transaction.commit:159 committing 'File transaction for '/root/.ssh/authorized_keys''
2014-10-27 12:55:50 DEBUG otopi.filetransaction filetransaction.commit:327 Executing restorecon for /root/.ssh
2014-10-27 12:55:50 DEBUG otopi.filetransaction filetransaction.commit:341 restorecon result rc=0, stdout=, stderr=
2014-10-27 12:55:50 DEBUG otopi.plugins.ovirt_hosted_engine_setup.engine.add_host plugin.executeRaw:785 execute: ('/sbin/restorecon', '-r', '/root/.ssh'), executable='None', cwd='None', env=None
2014-10-27 12:55:50 DEBUG otopi.plugins.ovirt_hosted_engine_setup.engine.add_host plugin.executeRaw:803 execute-result: ('/sbin/restorecon', '-r', '/root/.ssh'), rc=0
2014-10-27 12:55:50 DEBUG otopi.plugins.ovirt_hosted_engine_setup.engine.add_host plugin.execute:861 execute-output: ('/sbin/restorecon', '-r', '/root/.ssh') stdout:

2014-10-27 12:55:50 DEBUG otopi.plugins.ovirt_hosted_engine_setup.engine.add_host plugin.execute:866 execute-output: ('/sbin/restorecon', '-r', '/root/.ssh') stderr:

2014-10-27 12:55:50 DEBUG otopi.plugins.ovirt_hosted_engine_setup.engine.add_host add_host._closeup:415 Connecting to the Engine
2014-10-27 12:55:50 DEBUG otopi.context context._executeMethod:152 method exception
Traceback (most recent call last):
  File "/usr/lib/python2.6/site-packages/otopi/context.py", line 142, in _executeMethod
    method['method']()
  File "/usr/share/ovirt-hosted-engine-setup/scripts/../plugins/ovirt-hosted-engine-setup/engine/add_host.py", line 426, in _closeup
    ca_file=self.cert,
  File "/usr/lib/python2.6/site-packages/ovirtsdk/api.py", line 154, in __init__
    url=''
  File "/usr/lib/python2.6/site-packages/ovirtsdk/infrastructure/proxy.py", line 118, in request
    persistent_auth=self._persistent_auth)
  File "/usr/lib/python2.6/site-packages/ovirtsdk/infrastructure/proxy.py", line 146, in __doRequest
    persistent_auth=persistent_auth
  File "/usr/lib/python2.6/site-packages/ovirtsdk/web/connection.py", line 118, in doRequest
    self.__manager.getCookiesJar()
  File "/usr/lib64/python2.6/httplib.py", line 914, in request
    self._send_request(method, url, body, headers)
  File "/usr/lib64/python2.6/httplib.py", line 951, in _send_request
    self.endheaders()
  File "/usr/lib64/python2.6/httplib.py", line 908, in endheaders
    self._send_output()
  File "/usr/lib64/python2.6/httplib.py", line 780, in _send_output
    self.send(msg)
  File "/usr/lib64/python2.6/httplib.py", line 739, in send
    self.connect()
  File "/usr/lib/python2.6/site-packages/ovirtsdk/web/httpsconnection.py", line 72, in connect
    "any of the names in the server certificate." % self.host)
HTTPException: The host name "ovirt-admin-hosted.xxxxx.xxx.edu" contained in the URL doesn't match any of the names in the server certificate.
2014-10-27 12:55:50 ERROR otopi.context context._executeMethod:161 Failed to execute stage 'Closing up': The host name "ovirt-admin-hosted.xxxxx.xxx.edu" contained in the URL doesn't match any of the names in the server certificate.

 I have a functional copy of my original engine in the VM but it is not hosted. 

Any ideas/Pointers?


-Alastair