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

Hi all, OK, it seems I am confused. Nested KVM is NOT the same as fake KVM.... If so, I installed vdsm-hook-nestedvt on the hypervisor (only). Trying to run ovirt-Node on a VM it complains there 's no virtualization, despite the kvm_amd module is loaded with nested=1 How to enable nested-kvm for oVirt 3.6?

Winny Martin Polednik schreef op 04-01-2016 13:29: >On 04/01/16 09:52 +0100, Simone Tiraboschi wrote: >>On Fri, Jan 1, 2016 at 3:32 PM, Winfried de Heiden <wdh(a)dds.nl&gt; 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. > >Not really true - fake_kvm_support enables QEMU emulation instead of >hardware virtualization (e.g. VT-x) instructions. It is also quite >broken in it's current state and fix is pending in cpuinfo branch at >gerrit. > >I don't really understand the reason why fake_kvm would be used in >this case as AMD-v is enabled according to svm flag present - >following instructions should be correct for getting the flag passed >to the VMs. > >>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 >>> >>>_______________________________________________ >>>Users mailing list &gt;&gt;&gt;Users(a)ovirt.org >>>http://lists.ovirt.org/mailman/listinfo/users >>> > >>_______________________________________________ >>Users mailing list &gt;&gt;Users(a)ovirt.org >>http://lists.ovirt.org/mailman/listinfo/users