linux虚拟机修改网卡名

安装好的虚拟机修改网卡

查看网卡信息，记录MAC地址

[root@ha2 ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> 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: ens32: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:55:4e:95 brd ff:ff:ff:ff:ff:ff
    inet 192.168.200.102/24 brd 192.168.200.255 scope global ens32
       valid_lft forever preferred_lft forever
    inet6 fe80::49ad:e9b0:94ed:a48d/64 scope link
       valid_lft forever preferred_lft forever

重命名虚拟机网络配置文件名，修改网卡配置文件

cd /etc/sysconfig/network-scripts/
mv ifcfg-ens32 ifcfg-eth0
[root@ha2 network-scripts]# cat ifcfg-eth0
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=static
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=eth0
DEVICE=eth0
ONBOOT=yes
IPADDR=192.168.200.102
NETMASK=255.255.255.0
DNS1=202.106.0.20
DNS2=8.8.8.8
GATEWAY=192.168.200.1

禁用网卡一致性命名规则，修改/etc/sysconfig/grub，添加net.ifnames=0 biosdevname=0

[root@ha2 ~]# cat /etc/default/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 net.ifnames=0 biosdevname=0 rd.lvm.lv=centos/root rd.lvm.lv=centos/swap rhgb quiet"
GRUB_DISABLE_RECOVERY="true"

运行命令grub2-mkconfig -o /boot/grub2/grub.cfg 来重新生成GRUB配置并更新内核参数

[root@ha2 ~]# 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-adb589c959ac485fafade229a7d535cc
Found initrd image: /boot/initramfs-0-rescue-adb589c959ac485fafade229a7d535cc.img
done

创建/etc/udev/rules.d/XXX-net.rules规则

根据Centos 官方WIKI的FAQ中得知，如果你有多个接口，并且想要控制其设备名，而不是让内核以它自己的方式命名，创建/etc/udev/rules.d/XXX-net.rules规则是必要的！

注意：以前系统的net规则名称是70-persistent-net.rules，尽量也不变，MAC地址改成上面记录的地址

[root@ha2 usr]# cat /etc/udev/rules.d/70-persistent-net.rules
ACTION=="add", SUBSYSTEM=="net", DRIVERS=="?*", ATTR{type}=="1", ATTR{address}=="00:0C:29:55:4E:95", NAME="eth0",KERNEL=="eth*"

重启系统，验证

[root@ha2 ~]# reboot

[root@ha2 ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> 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: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:55:4e:95 brd ff:ff:ff:ff:ff:ff
    inet 192.168.200.102/24 brd 192.168.200.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::a7c9:da1a:1ed0:86b4/64 scope link
       valid_lft forever preferred_lft forever