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So I'm having issues nesting RDO on my T440s laptop (Intel(R)
Core(TM) i7-4600U CPU @ 2.10GHz), and I'm hoping someone on the list
can help<br>
<br>
My Physical Host (L0) is Fedora 19 running 3.14.4-100.fc19.x86_64
with nesting turned on<br>
My OpenStack Host is RHEL 6.5 or RHEL 7 (L1)<br>
My Guest is Cirros (L2)<br>
<br>
<br>
I'm installing RDO Icehouse under RHEL via<br>
<pre class="wiki"> packstack --allinone --os-neutron-install=n</pre>
I then try to startup a Cirros guest (L2) and the guest never spawns<br>
<br>
Taking a look at the qemu command line it looks as follows<br>
<br>
<pre class="wiki">/usr/libexec/qemu-kvm \
-global virtio-blk-pci.scsi=off \
-nodefconfig \
-nodefaults \
-nographic \
-machine accel=kvm:tcg \
-cpu host,+kvmclock \
-m 500 \
-no-reboot \
-kernel /var/tmp/.guestfs-497/kernel.2647 \
-initrd /var/tmp/.guestfs-497/initrd.2647 \
-device virtio-scsi-pci,id=scsi \
-drive file=/var/lib/nova/instances/3ae072b4-f4bf-42cf-b3ea-27d9768bc4df/disk,cache=none,format=qcow2,id=hd0,if=none \
-device scsi-hd,drive=hd0 \
-drive file=/var/tmp/.guestfs-497/root.2647,snapshot=on,id=appliance,if=none,cache=unsafe \
-device scsi-hd,drive=appliance \
-device virtio-serial \
-serial stdio \
-device sga \
-chardev socket,path=/tmp/libguestfsKGbB3D/guestfsd.sock,id=channel0 \
-device virtserialport,chardev=channel0,name=org.libguestfs.channel.0 \
-append panic=1 console=ttyS0 udevtimeout=600 no_timer_check acpi=off printk.time=1 cgroup_disable=memory root=/dev/sdb selinux=0 TERM=linux
</pre>
<br>
The issue appears to be running with "-cpu host" with this nesting
combination.<br>
<br>
Now if I run the qemu command directly on RHEL7 (L1) I get this
error<br>
KVM: entry failed, hardware error 0x7<br>
<br>
Under RHEL 6.5 (L1) it is similar but not identical<br>
kvm: unhandled exit 7<br>
<br>
<br>
In both cases on my Fedora physical host (L0) I see<br>
nested_vmx_run: VMCS MSR_{LOAD,STORE} unsupported<br>
<br>
<br>
There does appear to be a Red Hat bugzilla for RHEL7 relating to
this but not for RHEL6<br>
- <a class="moz-txt-link-freetext" href="https://bugzilla.redhat.com/show_bug.cgi?id=1038427">https://bugzilla.redhat.com/show_bug.cgi?id=1038427</a><br>
<br>
I can reproduce this issue using both RHEL 6.5 and RHEL 7 as my
OpenStack Host (L1). Has anyone else hit this issue?<br>
<br>
<br>
Next I tried a work around of editing the /etc/nova/nova.conf file
and forcing the CPU type for my guests under OpenStack<br>
<br>
#cpu_mode=none<br>
cpu_mode=custom<br>
<br>
# Set to a named libvirt CPU model (see names listed in<br>
# /usr/share/libvirt/cpu_map.xml). Only has effect if<br>
# cpu_mode="custom" and virt_type="kvm|qemu" (string value)<br>
# Deprecated group;name - DEFAULT;libvirt_cpu_model<br>
#cpu_model=<None><br>
cpu_model=Conroe<br>
<br>
<br>
Problem is qemu is still run with "-cpu host,+kvmclock"<br>
<br>
<br>
So am I hitting a secondary bug with nova-compute or is there
another way to force OpenStack to select a particular CPU subset for
Nova?<br>
<br>
Steve<br>
<br>
<div class="moz-signature">-- <br>
<span style="font-size: 12pt; font-weight: bold; color: gray;">Steven
Ellis
</span><br>
<span style="font-size: 10pt; font-weight: bold; color: gray;">
Solution Architect - <a href="http://www.redhat.co.nz/">Red Hat
New Zealand</a></span><span style="font-size: 9pt; color:
gray; font-family: monospace"><br>
<b>E:</b> <a href="mailto:sellis@redhat.com">sellis@redhat.com</a><a><br>
</a></span><a>
</a></div>
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