公司测试环境安装的都是RHEL6.3，在进行虚拟机克隆后，发现clone的虚拟机网卡起不来，具体报如下错误：[root@localhost Desktop]# service network restartShutting down loopback interface: [ OK ]Bringing up loopback interface: [ OK ]Bringing up interface eth0: Error: No suitable device found: no device found for connection ‘System eth0’. [FAILED]当你执行ifconfig命令的时候，会发现显示eth1网卡的配置文件却为/etc/sysconfig/network-scripts/ifcfg-eth0。[root@localhost network-scripts]# ifconfig|grep addreth1 Link encap:Ethernet HWaddr 00:0c:29:f4:95:e3 inet6 addr: fe80::20c:29ff:fe5c:65b7/64 Scope:Link Interrupt:19 Base address:0x2024 inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host[root@localhost network-scripts]# lsifcfg-eth0 ifdown-isdn ifup-aliases ifup-plusb init.ipv6-globalifcfg-lo ifdown-post ifup-bnep ifup-post net.hotplugifdown ifdown-ppp ifup-eth ifup-ppp network-functionsifdown-bnep ifdown-routes ifup-ippp ifup-routes network-functions-ipv6ifdown-eth ifdown-sit ifup-ipv6 ifup-sitifdown-ippp ifdown-tunnel ifup-isdn ifup-tunnelifdown-ipv6 ifup ifup-plip ifup-wireless[root@localhost network-scripts]#
产生这个问题的原因是虚拟机分配给操作系统的虚拟网卡MAC地址是不一样的。第一个系统的网卡MAC地址记录在了/etc/udev/rules.d/70-persistent-net.rules，命名为eth0。新克隆分配的系统的网卡MAC地址也记录在了该文件当中，，与之前的系统一样，因此有了冲突。可以查看一下两个机子的这个70-persistent-net.rules文件的内容第一个系统：[root@localhost rules.d]# cat 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.# PCI device 0x1022:0x2000 (pcnet32)SUBSYSTEM==”net”, ACTION==”add”, DRIVERS==”?*”, ATTR{address}==”00:0c:29:f4:95:e3″, ATTR{type}==”1″, KERNEL==”eth*”, 克隆后的系统：[root@localhost rules.d]# cat 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.# PCI device 0x1022:0x2000 (pcnet32)SUBSYSTEM==”net”, ACTION==”add”, DRIVERS==”?*”, ATTR{address}==”00:0c:29:f4:95:e3″, ATTR{type}==”1″, KERNEL==”eth*”,
最糟糕的行为是抱怨，最易见效 的努力是从自己做起。
