启动网卡报错(Failed to start LSB: Bring up/down networking )解决办法总结

原文:http://blog.51cto.com/11863547/1905929
           http://blog.csdn.net/debimeng/article/details/74296152?utm_source=itdadao&utm_medium=referral 

Failed to start LSB: Bring up/down networking

遇到这个错误好几次,所以总结了一下排解的几种方法。

错误记录及排查方法过程:

当我克隆出一台新的centos7的虚拟机的时候,修改了网卡配置文件启动时,报错

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[root@centos7 ~]# systemctl restart network
Job for network.service failed because the control process exited with error code. See "systemctl status network.service" and "journalctl -xe" for details.
[root@centos7 ~]#

按照提示输入systemctl status network.service查看

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[root@centos7 ~]# systemctl status network.service
● network.service - LSB: Bring up/down networking
   Loaded: loaded (/etc/rc.d/init.d/network; bad; vendor preset: disabled)
   Active: failed (Result: exit-code) since Mon 2017-03-13 23:24:37 CST; 16s ago
     Docs: man:systemd-sysv-generator(8)
  Process: 2878 ExecStart=/etc/rc.d/init.d/network start (code=exited, status=1/FAILURE)
 
Mar 13 23:24:37 centos7 network[2878]: RTNETLINK answers: File exists
Mar 13 23:24:37 centos7 network[2878]: RTNETLINK answers: File exists
Mar 13 23:24:37 centos7 network[2878]: RTNETLINK answers: File exists
Mar 13 23:24:37 centos7 network[2878]: RTNETLINK answers: File exists
Mar 13 23:24:37 centos7 network[2878]: RTNETLINK answers: File exists
Mar 13 23:24:37 centos7 network[2878]: RTNETLINK answers: File exists
Mar 13 23:24:37 centos7 systemd[1]: network.service: control process exited, code=exited status=1
Mar 13 23:24:37 centos7 systemd[1]: Failed to start LSB: Bring up/down networking.
Mar 13 23:24:37 centos7 systemd[1]: Unit network.service entered failed state.
Mar 13 23:24:37 centos7 systemd[1]: network.service failed.

无奈去百度了一下,找到解决方法,说是centos7没有70-persistent-net.rules这个文件,所以新克隆的机器需要配置mac地址。

通过ip a命令查看mac地址是00:0c:29:0c:15:49

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2: eno16777736: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:0c:15:49 brd ff:ff:ff:ff:ff:ff

然后在配置文件中加入这一行(如果存在的话只修改就可以)

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HWADDR=00:0c:29:0c:15:49

重启生效

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[root@centos7 ~]# systemctl restart network.service
Job for network.service failed because the control process exited with error code. See "systemctl status network.service" and "journalctl -xe" for details.
[root@centos7 ~]#

发现依然有这个错误

查看启动日志

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Mar 13 23:51:35 centos7 systemd: Starting LSB: Bring up/down networking...
Mar 13 23:51:35 centos7 network: Bringing up loopback interface:  Could not load file '/etc/sysconfig/network-scripts/ifcfg-lo'
Mar 13 23:51:35 centos7 network: Could not load file '/etc/sysconfig/network-scripts/ifcfg-lo'
Mar 13 23:51:35 centos7 network: Could not load file '/etc/sysconfig/network-scripts/ifcfg-lo'
Mar 13 23:51:35 centos7 network: Could not load file '/etc/sysconfig/network-scripts/ifcfg-lo'
Mar 13 23:51:35 centos7 network: [  OK  ]
Mar 13 23:51:36 centos7 network: Bringing up interface eth0:  Error: Connection activation failed: No suitable device found for this connection.
Mar 13 23:51:36 centos7 network: [FAILED]
Mar 13 23:51:36 centos7 network: RTNETLINK answers: File exists
Mar 13 23:51:36 centos7 network: RTNETLINK answers: File exists
Mar 13 23:51:36 centos7 network: RTNETLINK answers: File exists
Mar 13 23:51:36 centos7 network: RTNETLINK answers: File exists
Mar 13 23:51:36 centos7 network: RTNETLINK answers: File exists
Mar 13 23:51:36 centos7 network: RTNETLINK answers: File exists
Mar 13 23:51:36 centos7 network: RTNETLINK answers: File exists
Mar 13 23:51:36 centos7 network: RTNETLINK answers: File exists
Mar 13 23:51:36 centos7 network: RTNETLINK answers: File exists
Mar 13 23:51:36 centos7 systemd: network.service: control process exited, code=exited status=1
Mar 13 23:51:36 centos7 systemd: Failed to start LSB: Bring up/down networking.
Mar 13 23:51:36 centos7 systemd: Unit network.service entered failed state.
Mar 13 23:51:36 centos7 systemd: network.service failed.

发现无法加载/etc/sysconfig/network-scripts/ifcfg-lo文件

给NetworkManager-wait-online服务设置开机自启动

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systemctl enable NetworkManager-wait-online.service

然后重启网卡

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[root@centos7 ~]# systemctl restart network
Job for network.service failed because the control process exited with error code. See "systemctl status network.service" and "journalctl -xe" for details.
[root@centos7 ~]#

查看日志

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Could not load file '/etc/sysconfig/network-scripts/ifcfg-lo'

这个错误依然存在

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systemctl stop NetworkManager
systemctl disable NetworkManager

将 NetworkManager关闭,然后重启网卡,查看日志

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Mar 14 00:31:27 centos7 systemd: Starting LSB: Bring up/down networking...
Mar 14 00:31:27 centos7 network: Bringing up loopback interface:  [  OK  ]
Mar 14 00:31:28 centos7 network: Bringing up interface eth0:  ERROR    : [/etc/sysconfig/network-scripts/ifup-eth] Device eth0 does not seem to be present, delaying initialization.
Mar 14 00:31:28 centos7 /etc/sysconfig/network-scripts/ifup-eth: Device eth0 does not seem to be present, delaying initialization.
Mar 14 00:31:28 centos7 network: [FAILED]
Mar 14 00:31:28 centos7 network: RTNETLINK answers: File exists
Mar 14 00:31:28 centos7 network: RTNETLINK answers: File exists
Mar 14 00:31:28 centos7 network: RTNETLINK answers: File exists
Mar 14 00:31:28 centos7 network: RTNETLINK answers: File exists
Mar 14 00:31:28 centos7 network: RTNETLINK answers: File exists
Mar 14 00:31:28 centos7 network: RTNETLINK answers: File exists
Mar 14 00:31:28 centos7 network: RTNETLINK answers: File exists
Mar 14 00:31:28 centos7 network: RTNETLINK answers: File exists
Mar 14 00:31:28 centos7 network: RTNETLINK answers: File exists
Mar 14 00:31:28 centos7 systemd: network.service: control process exited, code=exited status=1
Mar 14 00:31:28 centos7 systemd: Failed to start LSB: Bring up/down networking.
Mar 14 00:31:28 centos7 systemd: Unit network.service entered failed state.
Mar 14 00:31:28 centos7 systemd: network.service failed.
Mar 14 00:33:42 centos7 dhclient[3813]: DHCPREQUEST on eno16777736 to 10.0.0.254 port 67 (xid=0x4d17f187)
Mar 14 00:33:42 centos7 dhclient[3813]: DHCPACK from 10.0.0.254 (xid=0x4d17f187)

那个错误已经不见了,但是重启网卡

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[root@centos7 ~]# systemctl restart network
Job for network.service failed because the control process exited with error code. See "systemctl status network.service" and "journalctl -xe" for details.
[root@centos7 ~]#

依然是这个错误,然后我又重新百度,说虚拟机设置中的两个连接选项(已连接和启动时连接)没有选择也会报同样的错,但是我的已经连接,问题依然存在,到底是因为什么呢?再次查找方法。

结果这次认真看了日志报错后发现是说eth0这个文件找不到

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Mar 14 00:36:39 centos7 network: Bringing up interface eth0:  ERROR    : [/etc/sysconfig/network-scripts/ifup-eth] Device eth0 does not seem to be present, delaying initialization.
Mar 14 00:36:39 centos7 /etc/sysconfig/network-scripts/ifup-eth: Device eth0 does not seem to be present, delaying initialization.

原来是之前做优化的时候将7的网卡名改成了eth0(众所周知7的网卡名是eno后面随机 一串数字),生成菜单时没有生效,那么在此生效一下

注意网卡配置名是已经修改成eth0以后执行下面操作,一共修改的地方有三处,第一处网卡名:/etc/sysconfig/network-scripts/ifcfg-eth0 ,第二处配置文件里面:NAME=eth0 ,第三处也是配置文件里面:DEVICE=eth0

修改/etc/sysconfig/grub,添加net.ifnames=0 biosdevname=0

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[root@centos7 ~]# cat  /etc/sysconfig/grub 
GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"
GRUB_DEFAULT=saved
GRUB_DISABLE_SUBMENU=true
GRUB_TERMINAL_OUTPUT="console"
GRUB_CMDLINE_LINUX="crashkernel=128M rd.lvm.lv=centos/root rhgb quiet net.ifnames=0 biosdevname=0"
GRUB_DISABLE_RECOVERY="true"
[root@centos7 ~]#

生成菜单

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[root@centos7 ~]# grub2-mkconfig -o /boot/grub2/grub.cfg 
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-3.10.0-327.el7.x86_64
Found initrd image: /boot/initramfs-3.10.0-327.el7.x86_64.img
Found linux image: /boot/vmlinuz-0-rescue-8058723e5e754d3aabc51842d9108e3b
Found initrd image: /boot/initramfs-0-rescue-8058723e5e754d3aabc51842d9108e3b.img
done
[root@centos7 ~]#

最后reboot重启

最后登录后正常

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