CentOS8提高篇7：Centos8配置网卡链路聚合

一、系统环境

1、在VMware Workstation部署Centos8系统

2、添加网卡

 

3、查看网卡，看到新加的两张网卡（eno33554984,eno50332208）是没有IP地址的

[root@localhost ~]# ip add

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN 

    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: eno16777736: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000

    link/ether 00:0c:29:10:c4:16 brd ff:ff:ff:ff:ff:ff

    inet 192.168.253.131/24 brd 192.168.253.255 scope global dynamic eno16777736

       valid_lft 1601sec preferred_lft 1601sec

    inet6 fe80::20c:29ff:fe10:c416/64 scope link 

       valid_lft forever preferred_lft forever

3: eno33554984: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000

    link/ether 00:0c:29:10:c4:20 brd ff:ff:ff:ff:ff:ff

4: eno50332208: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000

    link/ether 00:0c:29:10:c4:2a brd ff:ff:ff:ff:ff:ff

二、配置过程

1、nmcli查看设备状态，新增的网卡CONNECTION为Wired connection 2和1状态

[root@localhost ~]# nmcli device status

DEVICE       TYPE      STATE      CONNECTION         

eno16777736  ethernet  connected  eno16777736        

eno33554984  ethernet  connected  Wired connection 2 

eno50332208  ethernet  connected  Wired connection 1 

lo           loopback  unmanaged  --  

如果CONNECTION显示：Wired connection，删除即可

[root@localhost ~]# nmcli connection delete Wired\ connection\ 2

Connection 'Wired connection 2' (53ae8d3b-0774-42bb-949c-ae01a7fb22b8) successfully deleted.

[root@localhost ~]# nmcli connection delete Wired\ connection\ 1

Connection 'Wired connection 1' (25511265-8a01-4a1c-a370-14091516243b) successfully deleted.

2、创建链接聚合team1并查看网卡状态

[root@localhost ~]# nmcli connection add type team con-name team1 ifname team1 config '{"runner":{"name":"activebackup"}}'

Connection 'team1' (11162383-33d9-4b86-9cee-1349c9c273f7) successfully added.

[root@localhost ~]# nmcli device status

DEVICE       TYPE      STATE                                  CONNECTION 

eno16777736  ethernet  connected                              eno16777736

team1        team      connecting (getting IP configuration)  team1      

eno33554984  ethernet  disconnected                           --         

eno50332208  ethernet  disconnected                           --         

lo           loopback  unmanaged                              --         

[root@localhost ~]# nmcli connection show

NAME         UUID                                  TYPE            DEVICE     

eno16777736  2a18182f-7e85-40bf-93bc-c28fe4564ba3  802-3-ethernet  eno16777736

team1        11162383-33d9-4b86-9cee-1349c9c273f7  team            team1

3、将两张新网卡添加到这个team1中并查看网卡状态

[root@localhost ~]# nmcli connection add type team-slave con-name eno33554984 ifname eno33554984 master team1

Connection 'eno33554984' (722991e8-a542-4761-b347-334d13cae25a) successfully added.

[root@localhost ~]#

[root@localhost ~]# nmcli connection add type team-slave con-name eno50332208 ifname eno50332208 master team1

Connection 'eno50332208' (154fdde2-f162-47d5-b2d4-11dd89ae3a0f) successfully added.

[root@localhost ~]# nmcli device status

DEVICE       TYPE      STATE      CONNECTION 

eno16777736  ethernet  connected  eno16777736

eno33554984  ethernet  connected  eno33554984

eno50332208  ethernet  connected  eno50332208

team1        team      connected  team1      

lo           loopback  unmanaged  --         

[root@localhost ~]# nmcli connection show

NAME         UUID                                  TYPE            DEVICE     

eno16777736  2a18182f-7e85-40bf-93bc-c28fe4564ba3  802-3-ethernet  eno16777736

eno50332208  154fdde2-f162-47d5-b2d4-11dd89ae3a0f  802-3-ethernet  eno50332208

eno33554984  722991e8-a542-4761-b347-334d13cae25a  802-3-ethernet  eno33554984

team1        11162383-33d9-4b86-9cee-1349c9c273f7  team            team1

4、配置team1的IP地址,红色框是需要修改和添加的内容

[root@localhost ~]# vim /etc/sysconfig/network-scripts/ifcfg-team1

 

5、重启网卡服务

[root@localhost ~]# systemctl restart network

查看到网卡状态都是OK

[root@localhost ~]# systemctl status  network

network.service - LSB: Bring up/down networking

   Loaded: loaded (/etc/rc.d/init.d/network)

   Active: active (exited) since Mon 2018-07-09 18:29:13 CST; 21s ago

     Docs: man:systemd-sysv-generator(8)

  Process: 3353 ExecStop=/etc/rc.d/init.d/network stop (code=exited, status=0/SUCCESS)

  Process: 3657 ExecStart=/etc/rc.d/init.d/network start (code=exited, status=0/SUCCESS)

Jul 09 18:29:13 localhost.localdomain network[3657]: Could not load file '/etc/sysconfig/network-scripts/ifcfg-lo'

Jul 09 18:29:13 localhost.localdomain network[3657]: [  OK  ]

Jul 09 18:29:13 localhost.localdomain network[3657]: Bringing up interface eno16777736:  Connection successfully activated (D-Bus active pat...tion/6)

Jul 09 18:29:13 localhost.localdomain network[3657]: [  OK  ]

Jul 09 18:29:13 localhost.localdomain network[3657]: Bringing up interface eno33554984:  Connection successfully activated (D-Bus active pat...tion/7)

Jul 09 18:29:13 localhost.localdomain network[3657]: [  OK  ]

Jul 09 18:29:13 localhost.localdomain network[3657]: Bringing up interface eno50332208:  Connection successfully activated (D-Bus active pat...tion/9)

Jul 09 18:29:13 localhost.localdomain network[3657]: [  OK  ]

Jul 09 18:29:13 localhost.localdomain network[3657]: Bringing up interface team1:  [  OK  ]

Jul 09 18:29:13 localhost.localdomain systemd[1]: Started LSB: Bring up/down networking.

Hint: Some lines were ellipsized, use -l to show in full.

6、查看team1的IP地址和聚合配置，可以看到eno33554984是当前主接口

[root@localhost ~]# ip add

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN

    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: eno16777736: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000

    link/ether 00:0c:29:10:c4:16 brd ff:ff:ff:ff:ff:ff

    inet 192.168.253.131/24 brd 192.168.253.255 scope global dynamic eno16777736

       valid_lft 1727sec preferred_lft 1727sec

    inet6 fe80::20c:29ff:fe10:c416/64 scope link

       valid_lft forever preferred_lft forever

3: eno33554984: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master team1 state UP qlen 1000

    link/ether 00:0c:29:10:c4:20 brd ff:ff:ff:ff:ff:ff

4: eno50332208: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master team1 state UP qlen 1000

    link/ether 00:0c:29:10:c4:20 brd ff:ff:ff:ff:ff:ff

6: team1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP

    link/ether 00:0c:29:10:c4:20 brd ff:ff:ff:ff:ff:ff

    inet 192.168.253.140/24 brd 192.168.253.255 scope global team1

       valid_lft forever preferred_lft forever

    inet6 fe80::20c:29ff:fe10:c420/64 scope link

       valid_lft forever preferred_lft forever

[root@localhost ~]# teamdctl team1 state

setup:

  runner: activebackup

ports:

  eno33554984

    link watches:

      link summary: up

      instance[link_watch_0]:

        name: ethtool

        link: up

        down count: 0

  eno50332208

    link watches:

      link summary: up

      instance[link_watch_0]:

        name: ethtool

        link: up

        down count: 0

runner:

  active port: eno33554984

7、模拟接口故障，关掉一个接口测试，主接口变为eno50332208

[root@localhost ~]# ifdown eno33554984

Device 'eno33554984' successfully disconnected.

[root@localhost ~]# teamdctl team1 state

setup:

  runner: activebackup

ports:

  eno50332208

    link watches:

      link summary: up

      instance[link_watch_0]:

        name: ethtool

        link: up

        down count: 0

runner:

  active port: eno50332208

8、当故障接口恢复也不会抢占主接口，从而避免网络抖动

[root@localhost ~]# ifup eno33554984

Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/10)

[root@localhost ~]# teamdctl team1 state

setup:

  runner: activebackup

ports:

  eno33554984

    link watches:

      link summary: up

      instance[link_watch_0]:

        name: ethtool

        link: up

        down count: 0

  eno50332208

    link watches:

      link summary: up

      instance[link_watch_0]:

        name: ethtool

        link: up

        down count: 0

runner:

  active port: eno50332208