Hello,
<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>
[root@overcloud-novacompute-0 ~]# lsmod | grep kvm
kvm_intel 162153 70
kvm 525409 1 kvm_intel
[root@overcloud-novacompute-0 ~]# cat /etc/nova/nova.conf | grep virt_type|grep -v '^#'
virt_type=kvm
[root@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@xxxxxxxxxxx> a scris:
From: centos-virt-bounces@xxxxxxxxxx <centos-virt-bounces@xxxxxxxxxx> on behalf of Laurentiu Soica <laurentiu@xxxxxxxx>
Sent: Sunday, August 14, 2016 10:17 AM
To: Discussion about the virtualization on CentOS
Subject: Re: Nested KVM issueMore 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_64qemu-kvm:1.5.3-105.el7_2.4libvirt: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@xxxxxxxx> 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_______________________________________________
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