Xen 配置仅主机适配器

Question

正如我在虚拟管理器中看到的那样，Xen 管理程序有 2 种网络配置模式。 1 NAT 2 路由。两者都要求 IP 子网。但是我想配置一个可以分配任何 IP 而不是由 Xen 的 DHCP 分配的网络。

我使用过 oracle Virtual Box，有一个选项可以使用 Host-only 适配器。我想以这种方式使用 Xen。

换句话说，我想将物理网络接口共享给来宾机器（VM）

我在 CentOS 6.2 x86_64 上使用 Xen Hypervisor 3.x

我执行以下操作来解决这对我有用的问题。

Disabling Xen's network scripts
If using Xen it is recommended to disable its network munging by editing /etc/xen/xend-config.sxp and changing the line
(network-script network-bridge)

To be

(network-script /bin/true)

Disabling NetworkManager

As of the time of writing (Fedora 12), NetworkManager still does not support bridging, so it is necessary to use "classic" network initscripts for the bridge, and to explicitly mark them as independent from NetworkManager (the "NM_CONTROLLED=no" lines in the scripts below).

If desired, you can also completely disable the NetworkManager:

# chkconfig NetworkManager off
# chkconfig network on
# service NetworkManager stop
# service network start

Creating network initscripts

In the /etc/sysconfig/network-scripts directory it is neccessary to create 2 config files. The first (ifcfg-eth0) defines your physical network interface, and says that it will be part of a bridge:

# cat > ifcfg-eth0 <<EOF
DEVICE=eth0
HWADDR=00:16:76:D6:C9:45
ONBOOT=yes
BRIDGE=br0
NM_CONTROLLED=no
EOF

Obviously change the HWADDR to match your actual NIC's address. You may also wish to configure the device's MTU here using e.g. MTU=9000.

The second config file (ifcfg-br0) defines the bridge device:

# cat > ifcfg-br0 <<EOF
DEVICE=br0
TYPE=Bridge
BOOTPROTO=dhcp
ONBOOT=yes
DELAY=0
NM_CONTROLLED=no
EOF

WARNING: The line TYPE=Bridge is case-sensitive - it must have uppercase 'B' and lower case 'ridge'

After changing this restart networking (or simply reboot)

# service network restart

Visit for more details

Answer 1

对于 Xen，这只是桥接网络的一个特例。

您在 CentOS Dom0 上创建一个虚拟桥接器，然后将您的 VM 连接到该桥接器。

来自 CentOS 文档 (http://www.centos.org/docs/5/html/5.2/Virtualization/sect-Virtualization-Virtualized_network_devices-Laptop_network_configuration.html)

创建一个 dummy0 网络接口并为其分配一个静态 IP 地址。

在我们的示例中，我选择了 10.1.1.1 以避免在我们的环境中出现路由问题。要启用虚拟设备支持，请将以下行添加到 /etc/modprobe.conf

alias dummy0 dummy
options dummy numdummies=1

为 dummy0 配置网络编辑/创建 /etc/sysconfig/network-scripts/ifcfg-dummy0：

DEVICE=dummy0
BOOTPROTO=none
ONBOOT=yes
USERCTL=no
IPV6INIT=no
PEERDNS=yes
TYPE=Ethernet
NETMASK=255.255.255.0
IPADDR=10.1.1.1
ARP=yes

然后您可以将您的虚拟机连接到 dummy0 桥接设备

其他参考 http://wiki.xen.org/wiki/HostConfiguration/Networking