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RHEL6 虚拟机克隆网络问题解决方法

2011-11-03 11:30 519 查看
环境:Virtualbox+RHEL 6 x64

用VirtualBox的vboxmanager克隆的虚拟机,操作系统RHEL6,启动后发现网卡不能用了。重启网络服务,报以下错误:

Bringing up interface eth0: Device eth0 does not seem to be present, delaying initialization. [FAILED]

在RHEL5里也发生类似事情,因为复制虚拟机MAC会重新生成,但是操作系统的MAC却写在ifcfg-ethx里,造成了不一致,所以不能启动网络接 口,在RHEL5里可以使用kudzu或者注释网卡配置文件的MAC字段来解决这个问题。但是在RHEL6里,kudzu已经被hal服务取代了。虽然 lspci能够正常认到网卡,但是却无法使用/etc/init.d/network restart来启动服务。尝试注释ifcfg-eth0的MAC字段,还是报错。查看了下udev的规则,发现了问题的所在。

[root@Oracle ~]# cat /etc/udev/rules.d/70-persistent-net.rules

# This file was automatically generated by the /lib/udev/write_net_rules

# program, run by the persistent-net-generator.rules rules file.

#

# You can modify it, as long as you keep each rule on a single

# line, and change only the value of the NAME= key.

# net device () (custom name provided by external tool)

SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="08:00:27:16:31:11", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

# net device ()

SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="08:00:27:32:66:63", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"

[root@Oracle ~]#

原来UDEV这里把克隆前的MAC当成了当前虚拟机的eth0 MAC,而重新生成的08:00:27:32:66:63是eth1的MAC。

解决这个问题,只要删除旧的UDEV配置,修改为:

[root@Oracle ~]# cat /etc/udev/rules.d/70-persistent-net.rules

# This file was automatically generated by the /lib/udev/write_net_rules

# program, run by the persistent-net-generator.rules rules file.

#

# You can modify it, as long as you keep each rule on a single

# line, and change only the value of the NAME= key.

# net device () (custom name provided by external tool)

SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="08:00:27:32:66:63", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

重启network服务,一切OK

[root@Oracle ~]# /etc/init.d/network restart

Shutting down interface eth0: [ OK ]

Shutting down loopback interface: [ OK ]

Bringing up loopback interface: [ OK ]

Bringing up interface eth0: [ OK ]

[root@Oracle ~]# ifconfig eth0

eth0 Link encap:Ethernet HWaddr 08:00:27:32:66:63

inet addr:172.16.100.3 Bcast:172.16.100.255 Mask:255.255.255.0

inet6 addr: fe80::a00:27ff:fe32:6663/64 Scope:Link

UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

RX packets:206 errors:0 dropped:0 overruns:0 frame:0

TX packets:203 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:21157 (20.6 KiB) TX bytes:24515 (23.9 KiB)

Virtualbox有这个问题,VMWARE克隆虚拟机应该也是有这个问题的。

最简单的解决办法是直接删除 ,就当我上面废话

rm -fr /etc/udev/rules.d/70-persistent-net.rules 重启系统就ok了。会自动生成一个新的。
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