centos7更改网卡名称

1、系统版本

root@SIMS_INIT[/root]#cat /etc/redhat-release 
CentOS Linux release 7.4.1708 (Core) 

2、改网卡配置文件名

root@SIMS_INIT[/etc/sysconfig/network-scripts]#mv ifcfg-ens33 ifcfg-eth0
root@SIMS_INIT[/etc/sysconfig/network-scripts]#mv ifcfg-ens34 ifcfg-eth1

root@SIMS_INIT[/etc/sysconfig/network-scripts]#ll
total 248
-rw-r--r--  1 root root   113 Mar 13 10:52 ifcfg-eth0
-rw-r--r--  1 root root    50 Mar 20 15:29 ifcfg-eth1

3、改配置文件内容name和device

root@SIMS_INIT[/etc/sysconfig/network-scripts]#vi ifcfg-eth0
DEVICE=eth0
ONBOOT=yes
BOOTPROTO=none
IPADDR=192.168.8.112
NETMASK=255.255.255.0
GATEWAY=192.168.8.1
USERCTL=no

root@SIMS_INIT[/etc/sysconfig/network-scripts]#vi ifcfg-eth1
DEVICE=eth1
ONBOOT=yes
BOOTPROTO=dhcp
USERCTL=no

我这边没有name，有name的话记得name也要改。

4、关闭centos7一致性网络设备命名法

root@SIMS_INIT[/root]#vi /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=auto rd.lvm.lv=vg00/lvroot rhgb quiet net.ifnames=0 biosdevname=0"
GRUB_DISABLE_RECOVERY="true"

在GRUB_CMDLINE_LINUX选项后加上net.ifnames=0 biosdevname=0配置信息。

重新生成grub内核文件：

root@SIMS_INIT[/root]#grub2-mkconfig -o /boot/grub2/grub.cfg
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-3.10.0-693.el7.x86_64
Found initrd image: /boot/initramfs-3.10.0-693.el7.x86_64.img
Found linux image: /boot/vmlinuz-0-rescue-0755899e8a05490093731f3fe8730d26
Found initrd image: /boot/initramfs-0-rescue-0755899e8a05490093731f3fe8730d26.img
done

5、添加设备规则配置文件

root@SIMS_INIT[/root]#vi /etc/udev/rules.d/70-persistent-net.rules
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:3b:fb:79", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:3b:fb:83", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"

注意：

1、没有该文件新增即可。

2、注意mac地址和网卡名称的对应，可以通过ip addr命令获取。

6、重启主机生效

root@SIMS_INIT[/root]#reboot

7、确认生效配置

root@SIMS_INIT[/root]#ip addr
1: lo: mtu 65536 qdisc noqueue state UNKNOWN qlen 1
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0: mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:3b:fb:79 brd ff:ff:ff:ff:ff:ff
    inet 192.168.8.112/24 brd 192.168.8.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fe3b:fb79/64 scope link 
       valid_lft forever preferred_lft forever
3: eth1: mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:3b:fb:83 brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.46/24 brd 192.168.0.255 scope global dynamic eth1
       valid_lft 86350sec preferred_lft 86350sec
    inet6 fe80::20c:29ff:fe3b:fb83/64 scope link 
       valid_lft forever preferred_lft forever
4: virbr0: mtu 1500 qdisc noqueue state DOWN qlen 1000
    link/ether 52:54:00:2a:e5:f0 brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
       valid_lft forever preferred_lft forever
5: virbr0-nic: mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 1000
    link/ether 52:54:00:2a:e5:f0 brd ff:ff:ff:ff:ff:ff