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

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 >> Users(a)ovirt.org >> http://lists.ovirt.org/mailman/listinfo/users >> > _______________________________________________ > Users mailing list > Users(a)ovirt.org > http://lists.ovirt.org/mailman/listinfo/users