[ovirt-users] EVENT_ID not generated for VM Reboot

[Sigbjorn Lie-Soland]

Hi list,

When a user powers down a VM from within the VM operating system (poweroff), a 
"moved from 'Up' --> 'Down'" message is written to engine.log, and a EVENT_ID: 
VM_DOWN is created

--
2019-05-08 20:53:03,495+02 INFO  
[org.ovirt.engine.core.vdsbroker.monitoring.VmAnalyzer] 
(ForkJoinPool-1-worker-3) [] VM '-3966-4da2-a505-'(vmname1) 
moved from 'Up' --> 'Down'
2019-05-08 20:53:03,550+02 INFO  
[org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] 
(ForkJoinPool-1-worker-3) [] EVENT_ID: VM_DOWN(61), VM vmname1 is down. Exit 
message: User shut down from within the guest
--

When a user starts a VM from the webadmin, a "moved from 'WaitForLaunch' --> 
'PoweringUp'" and "'PoweringUp' --> 'Up'" is written to engine.log, and the 
events EVENT_ID: USER_STARTED_VM and EVENT_ID: USER_RUN_VM is created.

--
2019-05-08 20:53:20,976+02 INFO  
[org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] 
(EE-ManagedThreadFactory-engine-Thread-1388598) 
[-da2d-452d-a604-] EVENT_ID: USER_STARTED_VM(153), VM 
vmname1 was started by adminuser@ipadomain (Host: hypervisor1).
2019-05-08 20:53:24,091+02 INFO  
[org.ovirt.engine.core.vdsbroker.monitoring.VmAnalyzer] 
(ForkJoinPool-1-worker-3) [] VM '-3966-4da2-a505-'(vmname1) 
moved from 'WaitForLaunch' --> 'PoweringUp'
2019-05-08 20:53:45,140+02 INFO  
[org.ovirt.engine.core.vdsbroker.monitoring.VmAnalyzer] 
(ForkJoinPool-1-worker-3) [] VM '-3966-4da2-a505-'(vmname1) 
moved from 'PoweringUp' --> 'Up'
2019-05-08 20:53:45,238+02 INFO  
[org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] 
(ForkJoinPool-1-worker-3) [] EVENT_ID: USER_RUN_VM(32), VM vmname1 started on 
Host hypervisor1
--


However when a user reboots a VM from within the VM operating system, the 
messages "moved from 'Up' --> 'RebootInProgress'" and "moved from 
'RebootInProgress' --> 'Up'" is written to the engine.log, but no EVENT_ID is 
generated. --
--
2019-05-08 20:52:27,367+02 INFO  
[org.ovirt.engine.core.vdsbroker.monitoring.VmAnalyzer] 
(ForkJoinPool-1-worker-1) [] VM '-3966-4da2-a505-'(vmname1) 
moved from 'Up' --> 'RebootInProgress'
2019-05-08 20:52:49,926+02 INFO  
[org.ovirt.engine.core.vdsbroker.monitoring.VmAnalyzer] 
(ForkJoinPool-1-worker-1) [] VM '-3966-4da2-a505-'(vmname1) 
moved from 'RebootInProgress' --> 'Up'
--

So systems like CloudForms/ManageIQ which reads the manager event log via the 
manager REST API is not notified when a VM is rebooted, and is therefore unable 
to perform any EmsEvent when the VM reboots. 

Why is there no EVENT_ID generated when a VM reboots? Is it possible to enable 
EVENT_ID's to be created for VM reboot events?



Regards,
Siggi
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[ovirt-users] Hypervisor host CPU utilization metrics

[Sigbjorn Lie-Soland]

Hi,

Linux see twice the amount of CPUs for a host with SMT/hyperthreading enabled. 
Inspecting the individual cores presented to the operating system using mpstat 
shows that the guests are running primarily on the “physical cores”, which is 
expected as the system is SMT aware. The “hyperthreaded cores” are showing 
guest activity when the host cpu is heavily loaded. Using the traditional tools 
such as top and vmstat does not take hyperthreading into consideration when 
calculating the total cpu% usage, again, as expected.

How is the hypervisor host CPU utilization metrics in Ovirt calculated when a 
hypervisor host has SMT/hyperthreading enabled? Does Ovirt calculate in the 
same manner as the traditional vmstat/top/etc Linux tools, or does it only 
count CPU usage on the “physical cores” on the hypervisor? Does it read CPU 
metrics from the Intel PCM (https://github.com/opcm/pcm 
) ?

Does the “Count Threads as Cores” setting affect how the host hypervisor CPU 
utilization metrics are calculated?

The reason for asking is when using tools for capacity and utilization 
reporting to attempt to establish cluster growth and to anticipate when and how 
much hypervisor capacity to add, we need the input utilization data to be a 
correct representation of what is happening at the hypervisor host.

Thanks.



Regards,
Siggi

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