Hello,
1. <domain type='kvm' id='6'>
<name>baremetalbrbm_1</name>
<uuid>534e9b54-5e4c-4acb-adcf-793f841551a7</uuid>
<memory unit='KiB'>104857600</memory>
<currentMemory unit='KiB'>104857600</currentMemory>
<vcpu placement='static'>36</vcpu>
<resource>
<partition>/machine</partition>
</resource>
<os>
<type arch='x86_64' machine='pc-i440fx-rhel7.0.0'>hvm</type>
<boot dev='hd'/>
<bootmenu enable='no'/>
</os>
<features>
<acpi/>
<apic/>
<pae/>
</features>
<cpu mode='host-passthrough'/>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>restart</on_crash>
<devices>
<emulator>/usr/libexec/qemu-kvm</emulator>
<disk type='file' device='disk'>
<driver name='qemu' type='qcow2' cache='unsafe'/>
<source file='/var/lib/libvirt/images/baremetalbrbm_1.qcow2'/>
<backingStore/>
<target dev='sda' bus='sata'/>
<alias name='sata0-0-0'/>
<address type='drive' controller='0' bus='0' target='0' unit='0'/>
</disk>
<controller type='scsi' index='0' model='virtio-scsi'>
<alias name='scsi0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x04'
function='0x0'/>
</controller>
<controller type='usb' index='0'>
<alias name='usb'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01'
function='0x2'/>
</controller>
<controller type='pci' index='0' model='pci-root'>
<alias name='pci.0'/>
</controller>
<controller type='sata' index='0'>
<alias name='sata0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x05'
function='0x0'/>
</controller>
<interface type='bridge'>
<mac address='00:f1:15:20:c5:46'/>
<source network='brbm' bridge='brbm'/>
<virtualport type='openvswitch'>
<parameters interfaceid='654ad04f-fa0a-41dd-9d30-b84e702462fe'/>
</virtualport>
<target dev='vnet5'/>
<model type='virtio'/>
<alias name='net0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03'
function='0x0'/>
</interface>
<interface type='bridge'>
<mac address='52:54:00:d3:c9:24'/>
<source bridge='br57'/>
<target dev='vnet6'/>
<model type='rtl8139'/>
<alias name='net1'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x07'
function='0x0'/>
</interface>
<serial type='pty'>
<source path='/dev/pts/3'/>
<target port='0'/>
<alias name='serial0'/>
</serial>
<console type='pty' tty='/dev/pts/3'>
<source path='/dev/pts/3'/>
<target type='serial' port='0'/>
<alias name='serial0'/>
</console>
<input type='mouse' bus='ps2'/>
<input type='keyboard' bus='ps2'/>
<graphics type='vnc' port='5903' autoport='yes' listen='127.0.0.1'>
<listen type='address' address='127.0.0.1'/>
</graphics>
<video>
<model type='cirrus' vram='16384' heads='1'/>
<alias name='video0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02'
function='0x0'/>
</video>
<memballoon model='virtio'>
<alias name='balloon0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x06'
function='0x0'/>
</memballoon>
</devices>
</domain>
2.
[root at overcloud-novacompute-0 ~]# lsmod | grep kvm
kvm_intel 162153 70
kvm 525409 1 kvm_intel
[root at overcloud-novacompute-0 ~]# cat /etc/nova/nova.conf | grep
virt_type|grep -v '^#'
virt_type=kvm
[root at overcloud-novacompute-0 ~]# cat /etc/nova/nova.conf | grep
cpu_mode|grep -v '^#'
cpu_mode=host-passthrough
Thanks,
Laurentiu
În dum., 14 aug. 2016 la 21:44, Boris Derzhavets <bderzhavets at hotmail.com>
a scris:
>
>
>
> ------------------------------
> *From:* centos-virt-bounces at centos.org <centos-virt-bounces at centos.org>
> on behalf of Laurentiu Soica <laurentiu at soica.ro>
> *Sent:* Sunday, August 14, 2016 10:17 AM
> *To:* Discussion about the virtualization on CentOS
> *Subject:* Re: [CentOS-virt] Nested KVM issue
>
> More details on the subject:
>
> I suppose it is a nested KVM issue because it raised after I enabled the
> nested KVM feature. Without it, anyway, the second level VMs are unusable
> in terms of performance.
>
> I am using CentOS 7 with:
>
> kernel: 3.10.0-327.22.2.el7.x86_64
> qemu-kvm:1.5.3-105.el7_2.4
> libvirt:1.2.17-13.el7_2.5
>
> on both the baremetal and the compute VM.
>
> *Please, post*
>
> 1) # virsh dumpxml VM-L1 ( where on L1 level you expect nested KVM to
> appear)
> 2) Login into VM-L1 and run :-
> # lsmod | grep kvm
> 3) I need outputs from VM-L1 ( in case it is Compute Node )
>
> # cat /etc/nova/nova.conf | grep virt_type
> # cat /etc/nova/nova.conf | grep cpu_mode
>
> Boris.
>
>
>
>
>
> The only workaround now is to shutdown the compute VM and start it back
> from baremetal with virsh start.
> A simple restart of the compute node doesn't help. It looks like the
> qemu-kvm process corresponding to the compute VM is the problem.
>
> Laurentiu
>
> În dum., 14 aug. 2016 la 00:19, Laurentiu Soica <laurentiu at soica.ro> a
> scris:
>
>> Hello,
>>
>> I have an OpenStack setup in virtual environment on CentOS 7.
>>
>> The baremetal has *nested KVM* enabled and 1 compute node as a VM.
>>
>> Inside the compute node I have multiple VMs running.
>>
>> After about every 3 days the VMs get inaccessible and the compute node
>> reports high CPU usage. The qemu-kvm process for each VM inside the compute
>> node reports full CPU usage.
>>
>> Please help me with some hints to debug this issue.
>>
>> Thanks,
>> Laurentiu
>>
> _______________________________________________
> CentOS-virt mailing list
> CentOS-virt at centos.org
> https://lists.centos.org/mailman/listinfo/centos-virt
>
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