centos 6.4 複製無法載入網卡的問題解決方案

標籤：web

一.故障現象：

[[email protected] ~]#service network restart

Shutting downloopback insterface:                                                      [   OK  ]

Bringing uploopback insterface:                                                           [   OK  ]

Bringing upinterface eth0:  Device eth0 does notseem to be present,delaying initialization.                    [FAILED]

二、解決辦法

法一：

解決辦法：

[[email protected] ~]#rm -rf /etc/udev/rules.d/70-persistent-net.rules

[[email protected] ~]#reboot ………………

[[email protected] ~]#service network restart

Shutting downloopback insterface:                                                        [   OK   ]

Bringing uploopback insterface:                                                             [   OK   ]

Bringing up interfaceeth0:                                                                    [   OK   ]

法二：

安裝完一個centos虛擬機器，又拷貝一份，開機後網卡無法正常啟動，報錯：Device eth0 does not seem to be present,

delayinginitialization

解決：# mv/etc/sysconfig/network-scripts/ifcfg-eth0 /etc/sysconfig/network-scripts/ifcfg-eth1

vim /etc/sysconfig/network-scripts/ifcfg-eth1

修改DEVICE="eth0"

為DEVICE="eth1"

然後重啟啟動網卡嘗試下

法三：

在RHEL5裡也發生類似事情，因為複製虛擬機器MAC會重建，但是作業系統的MAC卻寫在ifcfg-ethx裡，造成了不一致，所以不能啟動網路介面，在RHEL5裡可以使用kudzu或者注釋網卡設定檔的MAC欄位來解決這個問題。但是在RHEL6裡，kudzu已經被hal服務取代了。雖然lspci能夠正常認到網卡，但是卻無法使用/etc/init.d/networkrestart來啟動服務。嘗試注釋ifcfg-eth0的MAC欄位，還是報錯。查看了下udev的規則，發現了問題的所在。

[[email protected]~]# 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″
[[email protected] ~]#

原來UDEV這裡把複製前的MAC當成了當前虛擬機器的eth0MAC，而重建的08:00:27:32:66:63是eth1的MAC。

解決這個問題，只要刪除舊的UDEV配置，修改為：
[[email protected] ~]# 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″

重啟network服務有時可以有時不行，重啟系統就一切OK！試過多次！
[[email protected] ~]# /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 ]

實在不行就reboot重啟，我就是這樣解決問題的。

本文出自 “Try to be brave” 部落格，謝絕轉載！

centos 6.4 複製無法載入網卡的問題解決方案