Device eth0 does not seem to be present,delaying initialization.

場景：在進行linux 主機克隆的時候，網卡初始化通常都會有問題，最多見的「Device eth0 does not seem to be present,delaying initialization.」，從字面意思 說eth0沒有固化，延遲啓動。因爲網卡有MAC地址信息，這個是物理網卡決定的，虛擬機的網卡MAC地址是在網卡初始化的時候就肯定下來，固然也能夠修改：

這個MAC地址在兩個地方有，因此在克隆虛擬機的時候必定記得要把這個MAC改掉。一個是 /etc/sysconfig/network-scripts/ifcfg-eth0，

DEVICE=eth0
HWADDR=00:0c:29:7e:aa:f3
TYPE=Ethernet
UUID=7e686749-c1d9-422d-9275-c8174d8ad7a5
ONBOOT=yes
NM_CONTROLLED=yes
BOOTPROTO=none
IPADDR=192.168.83.11
IPV6INIT=no
USERCTL=n

另一個是 /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.

# PCI device 0x8086:0x100f (e1000)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:7e:aa:f3", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

如上 要保證 HWADDR和ATTR{address}一致，NAME也要保持一致，而後重啓網卡生效。