让Proxmox VE支持嵌套虚拟化
目前公司的测试环境使用Proxmox VE(PVE),PVE虚拟出来的主机CPU默认不支持vmx,即不支持嵌套虚拟化,在虚拟机中使用egrep "vmx|svm" /proc/cpuinfo验证,无输出,那么如何让他支持呢?其实PVE的内核还是采用了KVM+Qemu的方式模拟,那么参照如何让KVM支持嵌套虚拟化的方法操作,开启nested即可nes...
目前公司的测试环境使用Proxmox VE(PVE),PVE虚拟出来的主机CPU默认不支持vmx,即不支持嵌套虚拟化,在虚拟机中使用egrep "vmx|svm" /proc/cpuinfo验证,无输出,那么如何让他支持呢?其实PVE的内核还是采用了KVM+Qemu的方式模拟,那么参照如何让KVM支持嵌套虚拟化的方法操作,开启nested即可
nested是一个可通过内核参数来启用的功能。它能够使一台虚拟机具有物理机CPU特性,支持vmx或者svm(AMD)硬件虚拟化。Proxmox VE是运行于Debian操作系统上的,也是支持嵌套式虚拟nested的,但默认情况下并未开启。开启nested很容易,我们可以通过命令检验嵌套虚拟化功能是否已被开启(实验环境,PVE4.4):
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cat
/sys/module/kvm_intel/parameters/nested
N
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可见默认状态下是未开启的,下面让我们来打开嵌套虚拟化,首先需要关闭所有虚拟机
列出所有虚拟机:
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qm list
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关闭虚拟机:
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qm stop <vmid>
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以上操作也可以在PVE网页控制台操作
开启内核支持:
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modprobe -r kvm_intel
modprobe kvm_intel nested=1
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执行modprobe -r kvm_intel时如果报错Module kvm_intel is in use,请检查你的虚拟机是否全部关闭
现在再看看nested是否已开启:
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cat
/sys/module/kvm_intel/parameters/nested
Y
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编辑配置文件:
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echo
"options kvm_intel nested=1"
>>
/etc/modprobe
.d
/modprobe
.conf
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这样系统重启也会自动加载netsted
查看虚拟机启动命令行,下面以我的环境中vmid为100的虚拟机为列:
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# qm showcmd 100
/usr/bin/kvm
-
id
100 -chardev socket,
id
=qmp,path=
/var/run/qemu-server/100
.qmp,server,nowait -mon chardev=qmp,mode=control -pidfile
/var/run/qemu-server/100
.pid -daemonize -smbios
type
=1,uuid=a1f4fefc-3d14-41c7-aeb1-bf9b79ef03df -name ops-
test
-172.16.30.20 -smp 2,sockets=1,cores=2,maxcpus=2 -nodefaults -boot menu=on,strict=on,reboot-timeout=1000,splash=
/usr/share/qemu-server/bootsplash
.jpg -vga cirrus -vnc unix:
/var/run/qemu-server/100
.vnc,x509,password -cpu kvm64,+lahf_lm,+sep,+kvm_pv_unhalt,+kvm_pv_eoi,enforce -m 4096 -k en-us -device pci-bridge,
id
=pci.1,chassis_nr=1,bus=pci.0,addr=0x1e -device pci-bridge,
id
=pci.2,chassis_nr=2,bus=pci.0,addr=0x1f -device piix3-usb-uhci,
id
=uhci,bus=pci.0,addr=0x1.0x2 -device usb-tablet,
id
=tablet,bus=uhci.0,port=1 -device virtio-balloon-pci,
id
=balloon0,bus=pci.0,addr=0x3 -iscsi initiator-name=iqn.1993-08.org.debian:01:6775cf970ba -drive
file
=
/var/lib/vz/template/iso/CentOS-7-x86_64-DVD-1611
.iso,
if
=none,
id
=drive-ide2,media=cdrom,aio=threads -device ide-
cd
,bus=ide.1,unit=0,drive=drive-ide2,
id
=ide2,bootindex=200 -device virtio-scsi-pci,
id
=scsihw0,bus=pci.0,addr=0x5 -drive
file
=
/dev/pve/vm-100-disk-1
,
if
=none,
id
=drive-scsi0,
format
=raw,cache=none,aio=native,detect-zeroes=on -device scsi-hd,bus=scsihw0.0,channel=0,scsi-
id
=0,lun=0,drive=drive-scsi0,
id
=scsi0,bootindex=100 -netdev
type
=tap,
id
=net0,ifname=tap100i0,script=
/var/lib/qemu-server/pve-bridge
,downscript=
/var/lib/qemu-server/pve-bridgedown
,vhost=on -device virtio-net-pci,mac=D2:15:25:81:73:BD,netdev=net0,bus=pci.0,addr=0x12,
id
=net0,bootindex=300
|
找到-cpu kvm64,+lahf_lm,+sep,+kvm_pv_unhalt,+kvm_pv_eoi,enforce
在后面加上+vmx,表示开启vmx
-cpu kvm64,+lahf_lm,+sep,+kvm_pv_unhalt,+kvm_pv_eoi,+vmx,enforce
关闭虚拟机:
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qm stop 100
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重新启动虚拟机:
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/usr/bin/kvm
-
id
100 -chardev socket,
id
=qmp,path=
/var/run/qemu-server/100
.qmp,server,nowait -mon chardev=qmp,mode=control -pidfile
/var/run/qemu-server/100
.pid -daemonize -smbios
type
=1,uuid=a1f4fefc-3d14-41c7-aeb1-bf9b79ef03df -name ops-
test
-172.16.30.20 -smp 2,sockets=1,cores=2,maxcpus=2 -nodefaults -boot menu=on,strict=on,reboot-timeout=1000,splash=
/usr/share/qemu-server/bootsplash
.jpg -vga cirrus -vnc unix:
/var/run/qemu-server/100
.vnc,x509,password -cpu kvm64,+lahf_lm,+sep,+kvm_pv_unhalt,+kvm_pv_eoi,+vmx,enforce -m 4096 -k en-us -device pci-bridge,
id
=pci.1,chassis_nr=1,bus=pci.0,addr=0x1e -device pci-bridge,
id
=pci.2,chassis_nr=2,bus=pci.0,addr=0x1f -device piix3-usb-uhci,
id
=uhci,bus=pci.0,addr=0x1.0x2 -device usb-tablet,
id
=tablet,bus=uhci.0,port=1 -device virtio-balloon-pci,
id
=balloon0,bus=pci.0,addr=0x3 -iscsi initiator-name=iqn.1993-08.org.debian:01:6775cf970ba -drive
file
=
/var/lib/vz/template/iso/CentOS-7-x86_64-DVD-1611
.iso,
if
=none,
id
=drive-ide2,media=cdrom,aio=threads -device ide-
cd
,bus=ide.1,unit=0,drive=drive-ide2,
id
=ide2,bootindex=200 -device virtio-scsi-pci,
id
=scsihw0,bus=pci.0,addr=0x5 -drive
file
=
/dev/pve/vm-100-disk-1
,
if
=none,
id
=drive-scsi0,
format
=raw,cache=none,aio=native,detect-zeroes=on -device scsi-hd,bus=scsihw0.0,channel=0,scsi-
id
=0,lun=0,drive=drive-scsi0,
id
=scsi0,bootindex=100 -netdev
type
=tap,
id
=net0,ifname=tap100i0,script=
/var/lib/qemu-server/pve-bridge
,downscript=
/var/lib/qemu-server/pve-bridgedown
,vhost=on -device virtio-net-pci,mac=D2:15:25:81:73:BD,netdev=net0,bus=pci.0,addr=0x12,
id
=net0,bootindex=300
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列出虚拟机:
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qm list
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发现vmid为100的虚拟机状态已变更为running
进入该虚拟机,使用命令验证是否已开启vmx:
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#egrep "vmx|svm" /proc/cpuinfo
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 lm constant_tsc nopl pni vmx cx16 x2apic hypervisor lahf_lm tpr_shadow vnmi flexpriority ept vpid
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 lm constant_tsc nopl pni vmx cx16 x2apic hypervisor lahf_lm tpr_shadow vnmi flexpriority ept vpid
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至此,成功在PVE中开启了嵌套虚拟化
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