Kvm-Virtualization

將單個 NIC 分配給 KVM 來賓

  • June 15, 2020

我有一台安裝了 6 個 NIC 的伺服器，並且正在執行 Ubuntu 12.04LTS。我想使用 kvm 設置 4 個來賓虛擬機。現在我想為主機分配 2 個 NIC（1 個公共 IP 和 1 個私有 IP），每個 1 個 NIC 分配給 4 個來賓 VM（所有私有 IP）。我該怎麼做呢？

/etc/network/interfaces

我的配置文件有問題，如下所示：

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet static
   address 192.168.1.109
   netmask 255.255.255.0
   gateway 192.168.1.5

auto eth1
iface eth1 inet static
       address 192.168.1.117
       netmask 255.255.255.0

auto eth2
iface eth2 inet manual

auto br0
iface br0 inet static
       address 192.168.1.118
       netmask 255.255.255.0
       bridge_ports eth2
       bridge_fd 9
       bridge_hello 2
       bridge_maxage 12
       bridge_stp off

auto eth3
iface eth3 inet manual

auto br1
iface br1 inet static
       address 192.168.1.119
       netmask 255.255.255.0
       bridge_ports eth3
       bridge_fd 9
       bridge_hello 2
       bridge_maxage 12
       bridge_stp off

auto eth4
iface eth4 inet manual

auto br2
iface br2 inet static
       address 192.168.1.123
       netmask 255.255.255.0
       bridge_ports eth4
       bridge_fd 9
       bridge_hello 2
       bridge_maxage 12
       bridge_stp off

auto eth5
iface eth5 inet manual

auto br3
iface br3 inet static
       address 192.168.1.124
       netmask 255.255.255.0
       bridge_ports eth5
       bridge_fd 9
       bridge_hello 2
       bridge_maxage 12
       bridge_stp off

**更新：**我現在可以工作了。唯一的問題是分配給來賓使用的 NIC 仍然在主機上獲得 IP，輸出如下：

eth0      Link encap:Ethernet  HWaddr 78:2b:cb:2b:61:ed  
         inet addr:192.168.1.109  Bcast:192.168.1.255  Mask:255.255.255.0
         inet6 addr: fe80::7a2b:cbff:fe2b:61ed/64 Scope:Link
         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
         RX packets:117 errors:0 dropped:0 overruns:0 frame:0
         TX packets:108 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 txqueuelen:1000 
         RX bytes:26221 (26.2 KB)  TX bytes:17217 (17.2 KB)
         Interrupt:36 Memory:d2000000-d2012800 

eth1      Link encap:Ethernet  HWaddr 78:2b:cb:2b:61:ee  
         inet addr:192.168.1.10  Bcast:192.168.1.255  Mask:255.255.255.0
         inet6 addr: fe80::7a2b:cbff:fe2b:61ee/64 Scope:Link
         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
         RX packets:40 errors:0 dropped:0 overruns:0 frame:0
         TX packets:14 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 txqueuelen:1000 
         RX bytes:9898 (9.8 KB)  TX bytes:3409 (3.4 KB)
         Interrupt:48 Memory:d4000000-d4012800 

eth2      Link encap:Ethernet  HWaddr 00:10:18:a8:84:80  
         inet6 addr: fe80::210:18ff:fea8:8480/64 Scope:Link
         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
         RX packets:46 errors:0 dropped:0 overruns:0 frame:0
         TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 txqueuelen:1000 
         RX bytes:11309 (11.3 KB)  TX bytes:2523 (2.5 KB)
         Interrupt:47 Memory:da000000-da012800 

eth3      Link encap:Ethernet  HWaddr 00:10:18:a8:84:82  
         inet6 addr: fe80::210:18ff:fea8:8482/64 Scope:Link
         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
         RX packets:51 errors:0 dropped:0 overruns:0 frame:0
         TX packets:17 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 txqueuelen:1000 
         RX bytes:12541 (12.5 KB)  TX bytes:4154 (4.1 KB)
         Interrupt:46 Memory:dc000000-dc012800 

eth4      Link encap:Ethernet  HWaddr 00:10:18:a8:84:84  
         inet6 addr: fe80::210:18ff:fea8:8484/64 Scope:Link
         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
         RX packets:55 errors:0 dropped:0 overruns:0 frame:0
         TX packets:13 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 txqueuelen:1000 
         RX bytes:15136 (15.1 KB)  TX bytes:3053 (3.0 KB)
         Interrupt:38 Memory:d6000000-d6012800 

eth5      Link encap:Ethernet  HWaddr 00:10:18:a8:84:86  
         inet6 addr: fe80::210:18ff:fea8:8486/64 Scope:Link
         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
         RX packets:58 errors:0 dropped:0 overruns:0 frame:0
         TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 txqueuelen:1000 
         RX bytes:14742 (14.7 KB)  TX bytes:2523 (2.5 KB)
         Interrupt:45 Memory:d8000000-d8012800 

lo        Link encap:Local Loopback  
         inet addr:127.0.0.1  Mask:255.0.0.0
         inet6 addr: ::1/128 Scope:Host
         UP LOOPBACK RUNNING  MTU:16436  Metric:1
         RX packets:639 errors:0 dropped:0 overruns:0 frame:0
         TX packets:639 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 txqueuelen:0 
         RX bytes:46422 (46.4 KB)  TX bytes:46422 (46.4 KB)

macvtap0  Link encap:Ethernet  HWaddr 52:54:00:8d:e7:e6  
         inet6 addr: fe80::5054:ff:fe8d:e7e6/64 Scope:Link
         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
         RX packets:57 errors:0 dropped:0 overruns:0 frame:0
         TX packets:7 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 txqueuelen:500 
         RX bytes:14074 (14.0 KB)  TX bytes:1553 (1.5 KB)

將 NIC 分配給來賓的最簡單方法是在主機中不配置它們，並為來賓 NIC 使用 macvtap 直通模式。請注意，如果沒有其他更複雜的設置，這將阻止 VM 實時遷移。

設置：

 <devices>
   ...
   <interface type='direct'>
     <source dev='eth0' mode='private'/>
   </interface>
 </devices>

或者您可以採用完整的 PCI 直通模式（前提是您有 IOMMU/VT-d）：

 <devices>
   <interface type='hostdev'>
     <source>
       <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/>
     </source>
     <mac address='52:54:00:6d:90:02'>
   </interface>
 </devices>

引用自：https://serverfault.com/questions/446658

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