(转)启动网卡报错(Failed to start LSB: Bring up/down networking )解决办法总结
启动网卡报错(Failed to start LSB: Bring up/down networking )解决办法总结
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 networkJob 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 existsMar 13 23:24:37 centos7 network[2878]: RTNETLINK answers: File existsMar 13 23:24:37 centos7 network[2878]: RTNETLINK answers: File existsMar 13 23:24:37 centos7 network[2878]: RTNETLINK answers: File existsMar 13 23:24:37 centos7 network[2878]: RTNETLINK answers: File existsMar 13 23:24:37 centos7 network[2878]: RTNETLINK answers: File existsMar 13 23:24:37 centos7 systemd[1]: network.service: control process exited, code=exited status=1Mar 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.serviceJob 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 existsMar 13 23:51:36 centos7 network: RTNETLINK answers: File existsMar 13 23:51:36 centos7 network: RTNETLINK answers: File existsMar 13 23:51:36 centos7 network: RTNETLINK answers: File existsMar 13 23:51:36 centos7 network: RTNETLINK answers: File existsMar 13 23:51:36 centos7 network: RTNETLINK answers: File existsMar 13 23:51:36 centos7 network: RTNETLINK answers: File existsMar 13 23:51:36 centos7 network: RTNETLINK answers: File existsMar 13 23:51:36 centos7 network: RTNETLINK answers: File existsMar 13 23:51:36 centos7 systemd: network.service: control process exited, code=exited status=1Mar 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 networkJob 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 NetworkManagersystemctl 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 existsMar 14 00:31:28 centos7 network: RTNETLINK answers: File existsMar 14 00:31:28 centos7 network: RTNETLINK answers: File existsMar 14 00:31:28 centos7 network: RTNETLINK answers: File existsMar 14 00:31:28 centos7 network: RTNETLINK answers: File existsMar 14 00:31:28 centos7 network: RTNETLINK answers: File existsMar 14 00:31:28 centos7 network: RTNETLINK answers: File existsMar 14 00:31:28 centos7 network: RTNETLINK answers: File existsMar 14 00:31:28 centos7 network: RTNETLINK answers: File existsMar 14 00:31:28 centos7 systemd: network.service: control process exited, code=exited status=1Mar 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 networkJob 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=5GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"GRUB_DEFAULT=savedGRUB_DISABLE_SUBMENU=trueGRUB_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_64Found initrd image: /boot/initramfs-3.10.0-327.el7.x86_64.imgFound linux image: /boot/vmlinuz-0-rescue-8058723e5e754d3aabc51842d9108e3bFound initrd image: /boot/initramfs-0-rescue-8058723e5e754d3aabc51842d9108e3b.imgdone[root@centos7 ~]# |
最后reboot重启
最后登录后正常
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