kvm Bridge 问题 - 没有网络到访客

kvm Bridge 问题 - 没有网络到访客

我目前有一个 Proxmox(debian)KVM 主机,运行多个 OpenVZ 容器以供一般使用,我正在考虑创建一个 KVM VM,但是我无法让网络为 CentOS KVM Guest 工作。

请从主机查找网络配置:

# ifconfig
eth0      Link encap:Ethernet  HWaddr xx:xx:xx:xx:xx:xx
          inet6 addr: fe80::22cf:30ff:fe19:7b67/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:41861518 errors:0 dropped:0 overruns:0 frame:0
          TX packets:23326041 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:16692957938 (xx.x GiB)  TX bytes:16624094064 (xx.x GiB)
          Interrupt:47 Memory:fbfe0000-fc000000

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:1805386 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1805386 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:532155476 (507.5 MiB)  TX bytes:532155476 (507.5 MiB)

vmbr0     Link encap:Ethernet  HWaddr xx:xx:xx:xx:xx:xx
          inet addr:88.xxx.xxx.229  Bcast:88.xxx.xxx.xxx  Mask:255.255.252.0
          inet6 addr: fe80::22cf:30ff:fe19:7b67/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:38116128 errors:0 dropped:0 overruns:0 frame:0
          TX packets:21500108 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:15771625496 (xx.x GiB)  TX bytes:16504698806 (xx.x GiB)

以及来自主机的路由:

# route -n
Kernel IP routing table
Destination     Gateway         Genmask           Flags Metric Ref    Use Iface
88.xxx.xxx.109  0.0.0.0         255.xxx.xxx.xxx   UH    0      0        0 venet0
88.xxx.xxx.0    0.0.0.0         255.xxx.xxx.xxx   U     0      0        0 vmbr0
0.0.0.0         88.xxx.xxx.1    0.0.0.0           UG    0      0        0 vmbr0

从来宾 CentOS KVM VM:

#ifconfig
    eth0      Link encap:Ethernet  HWaddr xx:xx:xx:xx:xx:xx
              inet addr:88.xxx.xxx.252  Bcast:88.xxx.xxx.255  Mask:255.255.252.0
              inet6 addr: fe80::22cf:30ff:fe19:7b67/64 Scope:Link
              UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
              RX packets:38116128 errors:0 dropped:0 overruns:0 frame:0
              TX packets:21500108 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:0
              RX bytes:15771625496 (xx.x GiB)  TX bytes:16504698806 (xx.x GiB)

    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:1805386 errors:0 dropped:0 overruns:0 frame:0
              TX packets:1805386 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:0
              RX bytes:532155476 (507.5 MiB)  TX bytes:532155476 (507.5 MiB)

客人的路线:

#route -n
Kernel IP routing table
Destination     Gateway       Genmask        Flags Matric  Ref   Use  Iface
88.xxx.xxx.0    0.0.0.0       255.255.252.0  U     0       0     0    eth0
169.254.0.0     0.0.0.0       255.255.0.0    U     0       0     0    eth0
0.0.0.0         88.xxx.xxx.1  0.0.0.0        UG    0       0     0    eth0

主机向客户机执行 ping 操作后返回以下信息:

# ping 88.xxx.xxx.252
PING 88.xxx.xxx.xxx (88.xxx.xxx.252) 56(84) bytes of data.
From 88.xxx.xxx.229 icmp_seq=1 Destination Host Unreachable
From 88.xxx.xxx.229 icmp_seq=2 Destination Host Unreachable
From 88.xxx.xxx.229 icmp_seq=3 Destination Host Unreachable
--- 88.208.236.252 ping statistics ---
4 packets transmitted, 0 received, +3 errors, 100% packet loss, time 3016ms

如能得到任何帮助我将非常感激!

编辑 抱歉,忘记包含 brctl 输出

# brctl show
bridge name     bridge id               STP enabled     interfaces
vmbr0           8000.20cf30197b67       no              eth0

答案1

我对 KVM 不是很了解,但根据我对 Xen 的了解,您的桥接器上似乎缺少一个接口 - 您那里只有物理主机接口,但它还应该列出您的客户机在主机上使用的任何网络设备。我看到主机的路由表上提到了 venet0 接口,您能否将 ifconfig 替换为 ifconfig -a?

如果 venet0 原来是客户机的接口,您可能应该使用 将其添加到网桥brctl addif vmbr0 venet0。但请记住,路由表显示主机认为链接“另一侧”的 IP 是 .109,因此如果原来是正确的接口,则您可能存在配置问题。但如果路由属于网桥,则删除通过 venet0 的路由应该就足够了。

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