I am trying to setup self-hosted-engine (4.2) on a single machine running 
centos 7.4.

I ran hosted-engine deploy script and it ran all the way through but failed on 
last task (at "Wait for the local bootstrap VM to be down at engine eyes") 
while creating the local engine VM. However, the --vm-status shows the engine 
status as up and is in good health, but I cannot interact with host installed 
on engine VM. 

The host within engine VM shows it is in non-responsive state, not clear why 
and what caused it. I can ssh into the local engine VM and the engine.log has 
below entries - 

2018-05-17 11:03:57,739+01 ERROR 
[org.ovirt.engine.core.vdsbroker.monitoring.VmDevicesMonitoring] 
(EE-ManagedThreadFactory-engineScheduled-Thread-78) [6768004b] Exception:: 
org.springframework.dao.DataIntegrityViolationException: 
CallableStatementCallback; SQL [{call insertvmdevice(?, ?, ?, ?, ?, ?, ?, ?, ?, 
?, ?, ?, ?, ?)}]; ERROR: insert or update on table "vm_device" violates foreign 
key constraint "fk_vm_device_vm_static"
  Detail: Key (vm_id)=(114581bb-7fef-4b08-8e3c-85dd5a9e680b) is not present in 
table "vm_static".
...
...
...
2018-05-17 11:03:59,957+01 ERROR 
[org.ovirt.engine.core.bll.pm.FenceProxyLocator] 
(EE-ManagedThreadFactory-engineScheduled-Thread-44) [2bf8b18f] Can not run 
fence action on host 'ovirt', no suitable proxy host was found.
...
...
...
2018-05-17 11:20:00,093+01 ERROR 
[org.ovirt.vdsm.jsonrpc.client.reactors.ReactorClient] 
(EE-ManagedThreadFactory-engine-Thread-2) [1a833057] Exception during connection
...
...
...
2018-05-17 11:20:00,386+01 ERROR 
[org.ovirt.engine.core.vdsbroker.HostDevListByCapsVDSCommand] 
(EE-ManagedThreadFactory-engine-Thread-2) [1a833057] Command 
'HostDevListByCapsVDSCommand(HostName = ovirt, 
VdsIdAndVdsVDSCommandParametersBase:{hostId='1a6a47e6-934e-43f7-ad5b-ba8f8ff8df99',
 vds='Host[ovirt,1a6a47e6-934e-43f7-ad5b-ba8f8ff8df99]'})' execution failed: 
java.net.UnknownHostException: ovirt: Name or service not known
...
...
...
2018-05-17 11:20:03,287+01 ERROR 
[org.ovirt.vdsm.jsonrpc.client.reactors.ReactorClient] 
(EE-ManagedThreadFactory-engineScheduled-Thread-14) [] Exception during 
connection
2018-05-17 11:20:03,292+01 ERROR 
[org.ovirt.engine.core.vdsbroker.monitoring.HostMonitoring] 
(EE-ManagedThreadFactory-engineScheduled-Thread-14) [] Unable to 
RefreshCapabilities: UnknownHostException: ovirt
2018-05-17 11:20:03,294+01 INFO  
[org.ovirt.engine.core.vdsbroker.vdsbroker.GetCapabilitiesAsyncVDSCommand] 
(EE-ManagedThreadFactory-engineScheduled-Thread-14) [] Command 
'org.ovirt.engine.core.vdsbroker.vdsbroker.GetCapabilitiesAsyncVDSCommand' 
return value 'org.ovirt.engine.core.vdsbroker.vdsbroker.VDSInfoReturn@46e3da89'
2018-05-17 11:20:03,294+01 INFO  
[org.ovirt.engine.core.vdsbroker.vdsbroker.GetCapabilitiesAsyncVDSCommand] 
(EE-ManagedThreadFactory-engineScheduled-Thread-14) [] HostName = ovirt
2018-05-17 11:20:03,297+01 ERROR 
[org.ovirt.engine.core.vdsbroker.vdsbroker.GetCapabilitiesAsyncVDSCommand] 
(EE-ManagedThreadFactory-engineScheduled-Thread-14) [] Command 
'GetCapabilitiesAsyncVDSCommand(HostName = ovirt, 
VdsIdAndVdsVDSCommandParametersBase:{hostId='1a6a47e6-934e-43f7-ad5b-ba8f8ff8df99',
 vds='Host[ovirt,1a6a47e6-934e-43f7-ad5b-ba8f8ff8df99]'})' execution failed: 
java.net.UnknownHostException: ovirt
2018-05-17 11:20:03,316+01 ERROR 
[org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] 
(EE-ManagedThreadFactory-engineScheduled-Thread-15) [] EVENT_ID: 
VDS_BROKER_COMMAND_FAILURE(10,802), VDSM ovirt command GetCapabilitiesAsyncVDS 
failed: Connection issue ovirt
2018-05-17 11:20:03,317+01 ERROR 
[org.ovirt.engine.core.vdsbroker.monitoring.HostMonitoring] 
(EE-ManagedThreadFactory-engineScheduled-Thread-15) [] Unable to 
RefreshCapabilities: VDSNetworkException: VDSGenericException: 
VDSNetworkException: Connection issue ovirt
...
...
...


and then above 5 ERROR messages are keep getting repeated. 

Why the connection fails when I can still ssh into the engine? where is the 
issue here?
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