Centos7网络重启失败

输入systemctl restart network.service后报错如下Job for network.service failed because the control process exited with error code.

[root@localhost network-scripts]# 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@localhost network-scripts]# 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 日 2022-05-29 20:39:26 CST; 11s ago
     Docs: man:systemd-sysv-generator(8)
  Process: 11528 ExecStart=/etc/rc.d/init.d/network start (code=exited, status=1/FAILURE)
    Tasks: 1
   CGroup: /system.slice/network.service
           └─1052 /sbin/dhclient -1 -q -lf /var/lib/dhclient/dhclient-fa9aeba6-a0a5-4af8-8be5-9fb0e332d183-ens33.lease -pf /var/run/dhclient-ens33.pid ens33

5月 29 20:39:26 localhost.localdomain network[11528]: RTNETLINK answers: File exists
5月 29 20:39:26 localhost.localdomain network[11528]: RTNETLINK answers: File exists
5月 29 20:39:26 localhost.localdomain network[11528]: RTNETLINK answers: File exists
5月 29 20:39:26 localhost.localdomain network[11528]: RTNETLINK answers: File exists
5月 29 20:39:26 localhost.localdomain network[11528]: RTNETLINK answers: File exists
5月 29 20:39:26 localhost.localdomain network[11528]: RTNETLINK answers: File exists
5月 29 20:39:26 localhost.localdomain systemd[1]: network.service: control process exited, code=exited status=1
5月 29 20:39:26 localhost.localdomain systemd[1]: Failed to start LSB: Bring up/down networking.
5月 29 20:39:26 localhost.localdomain systemd[1]: Unit network.service entered failed state.
5月 29 20:39:26 localhost.localdomain systemd[1]: network.service failed.

查看日志文件cat /var/log/messages | grep network

解决方法：
1、修改网卡名称和配置文件

mv /etc/sysconfig/network-scripts/ifcfg-ens33 /etc/sysconfig/network-scripts/ifcfg-eth0

vim /etc/sysconfig/network-scripts/ifcfg-eth0

按如下提示自行修改：

2、修改/etc/sysconfig/grub 添加net.ifnames=0 boisdevname=0

3、修改/etc/udev/rules.d/70-persistent-ipoib.rules文件
查看接口MAC地址
命令：ip link show或者ip addr

[root@localhost network-scripts]# ip link show
1: lo:  mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: ens33:  mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000
    link/ether 00:0c:29:13:79:ad brd ff:ff:ff:ff:ff:ff
3: virbr0:  mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default qlen 1000
    link/ether 52:54:00:cb:1c:48 brd ff:ff:ff:ff:ff:ff
4: virbr0-nic:  mtu 1500 qdisc pfifo_fast master virbr0 state DOWN mode DEFAULT group default qlen 1000
    link/ether 52:54:00:cb:1c:48 brd ff:ff:ff:ff:ff:ff

vim /etc/udev/rules.d/70-persistent-ipoib.rules

添加下图中标记内容：

reboot重启虚拟机就可以了
再次运行systemctl restart network.service没有报错

如果开启NetworkManager.service后再次报错

[root@localhost lj]# systemctl start NetworkManager.service
[root@localhost lj]# 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.

只需要关掉NetworkManager.service即可

[root@localhost lj]# service NetworkManager stop
Redirecting to /bin/systemctl stop NetworkManager.service
[root@localhost lj]# service network restart
Restarting network (via systemctl):                        [  确定  ]