centos7修改网卡名称、网卡双网卡绑定

Linux系统在大多数企业运用中都占据着及其重要的作用，但是从centos7开始我们发现安装完操作系统后，网卡名称发生了变化，不在是以前的eth0这样命名了。这对于我们使用起来有很多的不便。
本文将介绍如何修改网卡名称，及双网卡绑定。

[root@dwh ~]# ip a
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: ens33:  mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:84:ec:d4 brd ff:ff:ff:ff:ff:ff
    inet 192.168.12.143/24 brd 192.168.12.255 scope global dynamic ens33
       valid_lft 1460sec preferred_lft 1460sec
    inet6 fe80::43b6:8da1:941c:76a8/64 scope link 
       valid_lft forever preferred_lft forever

先修改网卡配置文件

[root@dwh ~]# cd /etc/sysconfig/network-scripts/

[root@dwh network-scripts]# ls
ifcfg-ens33  ifdown-isdn      ifup          ifup-plip      ifup-tunnel
ifcfg-lo     ifdown-post      ifup-aliases  ifup-plusb     ifup-wireless
ifdown       ifdown-ppp       ifup-bnep     ifup-post      init.ipv6-global
ifdown-bnep  ifdown-routes    ifup-eth      ifup-ppp       network-functions
ifdown-eth   ifdown-sit       ifup-ib       ifup-routes    network-functions-ipv6
ifdown-ib    ifdown-Team      ifup-ippp     ifup-sit
ifdown-ippp  ifdown-TeamPort  ifup-ipv6     ifup-Team
ifdown-ipv6  ifdown-tunnel    ifup-isdn     ifup-TeamPort

[root@dwh network-scripts]# mv ifcfg-ens33 ifcfg-eth0

[root@dwh network-scripts]# vim ifcfg-eth0 
TYPE="Ethernet"
BOOTPROTO="dhcp"
DEFROUTE="yes"
PEERDNS="yes"
PEERROUTES="yes"
IPV4_FAILURE_FATAL="no"
NAME="eth0"
UUID="18a685ec-ff6b-4a8f-be99-cfe597ada858"
DEVICE="eth0"
ONBOOT="yes"

禁用命名规则

[root@dwh network-scripts]# vim /etc/default/grub

GRUB_CMDLINE_LINUX="rd.lvm.lv=cl/root rd.lvm.lv=cl/swap rhgb net.ifnames=0 biosdevname=0 quiet"

[root@dwh network-scripts]# grub2-mkconfig -o /boot/grub2/grub.cfg 
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-3.10.0-514.el7.x86_64
Found initrd image: /boot/initramfs-3.10.0-514.el7.x86_64.img
Found linux image: /boot/vmlinuz-0-rescue-cd5074a9e6784fceb326c45e4293f6a2
Found initrd image: /boot/initramfs-0-rescue-cd5074a9e6784fceb326c45e4293f6a2.img
done

重启

[root@dwh network-scripts]# reboot

[root@dwh network-scripts]# ip a
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:29:84:ec:d4 brd ff:ff:ff:ff:ff:ff
    inet 192.168.12.143/24 brd 192.168.12.255 scope global dynamic eth0
       valid_lft 1118sec preferred_lft 1118sec
    inet6 fe80::20c:29ff:fe84:ecd4/64 scope link 
       valid_lft forever preferred_lft forever

二、配置双网卡链路聚合

[root@dwh ~]# nmcli connection add type team con-name team0 ifname team0 config '{"runner":{"name":"activebackup"}}'
Connection 'team0' (711bde84-1a1d-4aa2-a155-273d0110c031) successfully added.

添加IP

[root@dwh ~]# nmcli connection modify team0 ipv4.addresses "192.168.122.4/24" ipv4.method manual

添加网关、DNS

[root@dwh ~]# nmcli connection modify team0 ipv4.gateway "192.168.12.2" ipv4.dns "114.114.114.114"

[root@dwh ~]# nmcli connection add type team-slave con-name team0-p1 ifname eth0 master team0
Connection 'team0-p1' (2f281758-344a-4dc1-8204-67ff9c66f4b6) successfully added

[root@dwh ~]# nmcli connection add type team-slave con-name team0-p2 ifname eth1 master team0
Connection 'team0-p2' (2a5e5242-32b9-49ec-ae6a-a4e4c2366e7e) successfully added.

[root@dwh ~]# nmcli connection up team0
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/5)

[root@dwh ~]# nmcli connection up team0-p1
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/7)

[root@dwh ~]# nmcli connection up team0-p2
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/8)
[root@dwh ~]# ip a
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:29:84:ec:d4 brd ff:ff:ff:ff:ff:ff
    inet 192.168.12.143/24 brd 192.168.12.255 scope global dynamic eth0
       valid_lft 1745sec preferred_lft 1745sec
3: virbr0:  mtu 1500 qdisc noqueue state DOWN qlen 1000
    link/ether 52:54:00:54:55:bb 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
4: virbr0-nic:  mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 1000
    link/ether 52:54:00:54:55:bb brd ff:ff:ff:ff:ff:ff
5: eth1:  mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:84:ec:de brd ff:ff:ff:ff:ff:ff
    inet 192.168.12.144/24 brd 192.168.12.255 scope global dynamic eth1
       valid_lft 1749sec preferred_lft 1749sec
8: team0:  mtu 1500 qdisc noqueue state DOWN qlen 1000
    link/ether 9e:11:f7:2a:58:35 brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.4/24 brd 192.168.122.255 scope global team0
       valid_lft forever preferred_lft forever