VMware克隆虚拟机后网络不能正常使用的解决方法

1、问题情况

       在vmware中克隆一个虚拟机后,新的虚拟机网络无法使用,并用原操作系统中的网卡eth0在克隆出来的新系统中,网卡号变成了eth1,并且IP地址也丢失了,网络不可正常使用。

2、环境情况

原机器名称

克隆后目标主机

机器名称

别名

机器名称

别名

ol6-single

A机器

ol6_weblogic_1

B机器

3、克隆过程

      将A机器关闭,在Vmware控制台上,右击虚拟机A机器(ol6-single),点击“clone”—“下一步“,按提示一步步完成克隆过程,克降后机器名称命名为:ol6_weblogic_1

4、原系统与克隆后系统网络配置差异对比

4.1、ifconfig网络接口输出情况对比

(1)原机器(ol6-single)网络接口配置情况:

[root@ol6-single ~]# ifconfig -a

eth0      Link encap:Ethernet  HWaddr 00:0C:29:5E:35:00 

          inet addr:192.168.1.150  Bcast:192.168.1.255  Mask:255.255.255.0

          inet6 addr: fe80::20c:29ff:fe5e:3500/64 Scope:Link

          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

          RX packets:114 errors:0 dropped:0 overruns:0 frame:0

          TX packets:81 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:1000

          RX bytes:12918 (12.6 KiB)  TX bytes:15700 (15.3 KiB)

 

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:0 errors:0 dropped:0 overruns:0 frame:0

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

          collisions:0 txqueuelen:0

          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

 (2)克隆后主机(ol6_weblogic_1)网络接口配置情况

 

[root@ol6_weblogic_1 ~]# ifconfig -a

eth1      Link encap:Ethernet  HWaddr 00:0C:29:3A:F2:8E 

          inet addr:192.168.91.133  Bcast:192.168.91.255  Mask:255.255.255.0

          inet6 addr: fe80::20c:29ff:fe3a:f28e/64 Scope:Link

          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

          RX packets:114 errors:0 dropped:0 overruns:0 frame:0

          TX packets:22 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:1000

          RX bytes:1784 (1.7 KiB)  TX bytes:4139 (4.0 KiB)

 

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:0 errors:0 dropped:0 overruns:0 frame:0

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

          collisions:0 txqueuelen:0

       克隆过来后,原本的eth0变成了eth1,IP地址也丢失了,并用HWaddr的值发生改变了。

4.2、网络接口配置文件存在情况对比

A机器(原机器)

B机器(克隆后机器)

cd /etc/sysconfig/network-scripts

cd /etc/sysconfig/network-scripts

[root@ol6-single network-scripts]# ls ifcfg-eth*

ifcfg-eth0

[root@ol6-weblogic_1 network-scripts]# ls ifcfg-eth*

ifcfg-eth0

       从上面对比结果看来,虽然克隆后的B机器从ifconfig –a上看到原来的eth0不见了,变成了eth1,但是,在/etc/sysconfig/network-scripts看到,B机器的网卡配置文件名称仍然叫eth0

4.3、网络设备绑定文件70-persistent-net.rules内容对比

A机器

(原机器)

# 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.

 

# PCI device 0x8086:0x100f (e1000)

SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:5e:35:00", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

B机器

(克隆后机器)

# 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.

 

# PCI device 0x8086:0x100f (e1000)

SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:5e:35:00", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:3a:f2:8e", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"

       从上面比较来看,克隆后的机器,/etc/udev/rules.d/70-persistent-net.rules多出了一行配置,见上面标红色内 容,其NAME=“eth1”,MAC发生了变化,原有的NAME="eth0"一行内容仍在,且MAC地址也相同。

5、解决办法

5.1、修改克隆后机器(B机器)70-persistent-net.rules文件内容

     对克隆后机器(B机器)/etc/udev/rules.d/70-persistent-net.rules文件进行两步修改:

(1)   将原NAME="eth0"行内容注释

(2)   将NAME="eth1"行内容中的"eth1"修改成"eth0"

修改完成后内容如下:

# 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.

 

# PCI device 0x8086:0x100f (e1000)

#SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:5e:35:00", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:3a:f2:8e", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

5.2、修改克隆后机器(B机器)的Mac地址与IP地址

[root@ol6_weblogic_1 network-scripts]# vi/etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE="eth0"

HWADDR="00:0C:29:3a:f2:8e"

NM_CONTROLLED="yes"

ONBOOT="yes"

IPADDR=192.168.1.230

NETWORK=192.168.1.0

NETMAST=255.255.255.0

TYPE="Ethernet"

UUID="b1b9ac33-19ad-4bb3-ac6c-06d5a3fa7c5b"

特别注意:

       修改的MAC地址,只能是与70-persistent-net.rules文件中ATTR{address}相同的地址

 

5.3、重启操作系统生效

     经验证,重启网络服务(service network restart)方式,IP地址可以变化过来,但是网络接口名称修改不生效。

6、验证

[root@ol6_weblogic_1 ~]# ifconfig –a

eth0      Link encap:Ethernet  HWaddr 00:0C:29:3A:F2:8E 

          inet addr:192.168.1.230  Bcast:192.168.1.255  Mask:255.255.255.0

          inet6 addr: fe80::20c:29ff:fe3a:f28e/64 Scope:Link

          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

          RX packets:380 errors:0 dropped:0 overruns:0 frame:0

          TX packets:402 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:1000

          RX bytes:35506 (34.6 KiB)  TX bytes:54463 (53.1 KiB)

 

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:0 errors:0 dropped:0 overruns:0 frame:0

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

          collisions:0 txqueuelen:0

          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

 

    结果:eth1变回了eth0,并且IP地址为所设置的IP地址,网络已可正常使用



 

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