[ovirt-users] Nested KVM - vdsm-hook-nestedvt

[Simone Tiraboschi]

On Fri, Jan 1, 2016 at 3:32 PM, Winfried de Heiden <wdh at dds.nl> wrote:

> Hi all and happy new year!
>
> I'm running oVirt 3.6 on EL7.
>
> In order to test nested-kvm I installed vdsm-hook-nestedvt on the
> hypervisor and put "fake_kvm_support = true" in /etc/vdsm/vdsm.conf.




fake_kvm_support is just for developing purposes and it's not needed as it
prevent guests to run.

Please check to understand if nested support is enabled on your host:
/sys/module/kvm_intel/parameters/nested

if not
   echo "options kvm-intel nested=1" > /etc/modprobe.d/kvm-intel.conf
and reload the module

Than install vdsm-hook-nestedvt on your hosts.
If you want also to use the network on your L2 guest please install and
configure also macspoof vdsm hook on your physical hosts otherwise all the
traffic to/from your L2 guests will be dropped.
https://github.com/oVirt/vdsm/tree/master/vdsm_hooks/macspoof




> However, afterwards the hypervisor host cannot connect to the ovirt
> Manager, on ovirt Manager the engine.log will tell:
>
> 2016-01-01 15:21:42,105 WARN
> [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector]
> (DefaultQuartzScheduler_Worker-76) [71d1638c] Correlation ID: 29daf92c,
> Call Stack: null, Custom Event ID: -1, Message: Host bigvirt moved to
> Non-Operational state as host does not meet the cluster's minimum CPU
> level. Missing CPU features : model_Opteron_G3
>
> After removing the option all works well again, but I'ḿ lacking the nested
> kvm option :( Is nested kvm only supported on a limited cpu's??
>
> Winny
>
> Information from /proc/cpuinfo:
>
> processor       : 0
> vendor_id       : AuthenticAMD
> cpu family      : 16
> model           : 10
> model name      : AMD Phenom(tm) II X6 1055T Processor
> stepping        : 0
> microcode       : 0x10000bf
> cpu MHz         : 2800.000
> cache size      : 512 KB
> physical id     : 0
> siblings        : 6
> core id         : 0
> cpu cores       : 6
> apicid          : 0
> initial apicid  : 0
> fpu             : yes
> fpu_exception   : yes
> cpuid level     : 6
> wp              : yes
> flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca
> cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt
> pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good nopl nonstop_tsc
> extd_apicid aperfmperf pni monitor cx16 popcnt lahf_lm cmp_legacy svm
> extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt
> cpb hw_pstate npt lbrv svm_lock nrip_save pausefilter
> bogomips        : 5625.54
> TLB size        : 1024 4K pages
> clflush size    : 64
> cache_alignment : 64
> address sizes   : 48 bits physical, 48 bits virtual
> power management: ts ttp tm stc 100mhzsteps hwpstate cpb
>
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