NIC Teaming on CentOS 7 with nmtui

Posted 2020-08-24

    NIC  Teaming on CentOS 7 with nmtui

    在Linux，可以将多个网络链路聚合成一个逻辑链路，可以增加网络吞吐量或冗余。例如，我们可以将IP地址分配给由两个网络接口组成的组，使我们的吞吐量加倍，或者为备份预留一个接口，如果第一个失败，第二个网卡继续工作。链路聚合在过去做了bond，但在RHEL7中，team将是首选方法。因为team可以聚合更高效，比bonding更具优势。下图为team与bond差异列表。

这里我们将介绍如何创建和配置具有两个不同网络接口的team。

1、Teaming Daemon安装

为了使用teaming功能，首先必须安装teamd包，系统通常不会安装。使用如下命令进行安装。

#yum install teamd -y

2、nmtui配置teaming

首先查看系统当前connection及device配置

[[email protected] Desktop]# nmcli device status

DEVICE       TYPE      STATE         CONNECTION 

eno16777736  ethernet  disconnected  --         

eno33554992  ethernet  disconnected  --         

lo           loopback  unmanaged     --         

[[email protected] Desktop]# nmcli connection show

NAME  UUID  TYPE  DEVICE 

[[email protected] Desktop]# 

两块网卡上均没有connection.执行nmtui配置teaming。

选择"edit a connection"移动光标至ok，回车进入下一步。

选择add,回车。

选择设备类型team,crate.

profile name根据需求设置，此处设置为myteam0,device也可以根据需求设定，此处设定为team0。设置完成后移动光标add处，添加slave设备。

选择Ethernet类型创建

profile name根据需求设置，此处设置为myteam0-port1,device设置为服务器网卡设备名称。

同上添加第二块网卡并设置profile name与device.设置完成后如下图结果。

json配置，移动光标至Edit处，回车将临时打开一个vim窗口，在vim窗口中输入{ "runner": {"name": "loadbalance"}}，

保存退出后，显示如下。

配置ipv4,设置为manual，设置ip，网关，dns如下

完成后保存退出，teaming配置完成自动创建相关配置文件，如下：

[[email protected] network-scripts]# cat ifcfg-myteam0

DEVICE=team0

TEAM_CONFIG="{\"runner\": {\"name\": \"loadbalance\"}}"

DEVICETYPE=Team

BOOTPROTO=none

DNS1=192.168.31.1

DEFROUTE=yes

IPV4_FAILURE_FATAL=no

IPV6INIT=yes

IPV6_AUTOCONF=yes

IPV6_DEFROUTE=yes

IPV6_FAILURE_FATAL=no

NAME=myteam0

UUID=1f4ed5e2-46a1-4dbf-a870-5b088957a434

ONBOOT=yes

IPADDR=192.168.31.108

PREFIX=24

GATEWAY=192.168.31.1

IPV6_PEERDNS=yes

IPV6_PEERROUTES=yes

[[email protected] network-scripts]# cat ifcfg-myteam0-port1 

NAME=myteam0-port1

UUID=2b975876-780f-4181-971e-a79cf6a07a40

DEVICE=eno16777736

ONBOOT=yes

TEAM_MASTER=1f4ed5e2-46a1-4dbf-a870-5b088957a434

DEVICETYPE=TeamPort

[[email protected] network-scripts]# cat ifcfg-myteam0-port2

NAME=myteam0-port2

UUID=24e3ef82-fb93-4d11-9a6e-4c27227f7f66

DEVICE=eno33554992

ONBOOT=yes

TEAM_MASTER=1f4ed5e2-46a1-4dbf-a870-5b088957a434

DEVICETYPE=TeamPort

[[email protected] network-scripts]# 

再次查看当前connection状态。

[[email protected] Desktop]# nmcli connection show

NAME           UUID                                  TYPE            DEVICE      

myteam0        1f4ed5e2-46a1-4dbf-a870-5b088957a434  team            team0       

myteam0-port2  24e3ef82-fb93-4d11-9a6e-4c27227f7f66  802-3-ethernet  eno33554992 

myteam0-port1  2b975876-780f-4181-971e-a79cf6a07a40  802-3-ethernet  eno16777736 

查看服务器当前设备的状态。

[[email protected] Desktop]# nmcli device status

DEVICE       TYPE      STATE      CONNECTION    

eno16777736  ethernet  connected  myteam0-port1 

eno33554992  ethernet  connected  myteam0-port2 

team0        team      connected  myteam0       

lo           loopback  unmanaged  --       

查看ip地址信息。     

[[email protected] Desktop]# ip a s

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 master team0 state UP qlen 1000

    link/ether 00:0c:29:51:e8:75 brd ff:ff:ff:ff:ff:ff

3: eno33554992: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master team0 state UP qlen 1000

    link/ether 00:0c:29:51:e8:75 brd ff:ff:ff:ff:ff:ff

5: team0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP 

    link/ether 00:0c:29:51:e8:75 brd ff:ff:ff:ff:ff:ff

    inet 192.168.31.108/24 brd 192.168.31.255 scope global team0

       valid_lft forever preferred_lft forever

    inet6 fe80::20c:29ff:fe51:e875/64 scope link tentative dadfailed 

       valid_lft forever preferred_lft forever

查看myteam0的详细信息及状态如下

[[email protected] Desktop]# teamdctl team0 state

setup:

  runner: loadbalance

ports:

  eno16777736

    link watches:

      link summary: up

      instance[link_watch_0]:

        name: ethtool

        link: up

        down count: 0

  eno33554992

    link watches:

      link summary: up

      instance[link_watch_0]:

        name: ethtool

        link: up

        down count: 0

通过teamnl查看slave网卡状态

[[email protected] ~]# teamnl team0 ports

 3: eno33554992: up 1000Mbit FD 

 2: eno16777736: up 1000Mbit FD 

[[email protected] ~]# 

3、测试

在客户及ping 192.168.31.108，然后在服务器端断开某块网卡链接，ping命令不终端。

[[email protected] Desktop]# nmcli device disconnect eno16777736 

Device ‘eno16777736‘ successfully disconnected.

[[email protected] Desktop]# 

[[email protected] Desktop]# nmcli connection show

NAME           UUID                                  TYPE            DEVICE      

myteam0-port2  1a0f2bfd-cea1-4c7b-b2de-d34199b8561e  802-3-ethernet  eno33554992 

myteam0-port1  8e0c325c-d069-4014-bb75-1fa1f4674618  802-3-ethernet  --          

myteam0        e2976c8e-da7d-4901-88c6-db8a9913947c  team            team0       

[[email protected] Desktop]# nmcli device status

DEVICE       TYPE      STATE         CONNECTION    

eno33554992  ethernet  connected     myteam0-port2 

team0        team      connected     myteam0       

eno16777736  ethernet  disconnected  --            

lo           loopback  unmanaged     --            

[[email protected] Desktop]#

[[email protected] Desktop]# teamdctl team0 state

setup:

  runner: loadbalance

ports:

  eno33554992

    link watches:

      link summary: up

      instance[link_watch_0]:

        name: ethtool

        link: up

        down count: 0

[[email protected] Desktop]# 

断开链接后，查看客户端ping未终端。

4、修改team配置

对于team的配置可以通过nmtui或者nmcli进行修改，nmtui打开图形，在json配置界面，选择edit修改vim窗口的内容保存退出即可。

[[email protected] Desktop]# nmcli connection down myteam0

Connection ‘myteam0‘ successfully deactivated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/9)

[[email protected] Desktop]# nmcli connection show

NAME           UUID                                  TYPE            DEVICE 

myteam0-port1  2b975876-780f-4181-971e-a79cf6a07a40  802-3-ethernet  --     

myteam0-port2  24e3ef82-fb93-4d11-9a6e-4c27227f7f66  802-3-ethernet  --     

myteam0        1f4ed5e2-46a1-4dbf-a870-5b088957a434  team            --     

[[email protected] Desktop]# nmcli device status

DEVICE       TYPE      STATE         CONNECTION 

eno16777736  ethernet  disconnected  --         

eno33554992  ethernet  disconnected  --                

lo           loopback  unmanaged     --         

[[email protected] Desktop]# nmcli connection up myteam0-port1

Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/12)

[[email protected] Desktop]# nmcli connection up myteam0-port2

Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/14)

[[email protected] Desktop]# nmcli connection up myteam0

Connection successfully activated (master waiting for slaves) (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/15)

[[email protected] Desktop]# nmcli device status

DEVICE       TYPE      STATE      CONNECTION    

eno16777736  ethernet  connected  myteam0-port1 

eno33554992  ethernet  connected  myteam0-port2 

team0        team      connected  myteam0       

bond0        bond      unmanaged  --            

lo           loopback  unmanaged  --            

[[email protected] Desktop]# nmcli connection show

NAME           UUID                                  TYPE            DEVICE      

myteam0-port1  2b975876-780f-4181-971e-a79cf6a07a40  802-3-ethernet  eno16777736 

myteam0-port2  24e3ef82-fb93-4d11-9a6e-4c27227f7f66  802-3-ethernet  eno33554992 

myteam0        1f4ed5e2-46a1-4dbf-a870-5b088957a434  team            team0       

[[email protected] Desktop]# teamdctl team0 state

setup:

  runner: roundrobin

ports:

  eno16777736

    link watches:

      link summary: up

      instance[link_watch_0]:

        name: ethtool

        link: up

        down count: 0

  eno33554992

    link watches:

      link summary: up

      instance[link_watch_0]:

        name: ethtool

        link: up

        down count: 0

[[email protected] Desktop]# 

备注：

（1）、team配置文件的可以看考/usr/share/doc/teamd-1.25/目录中文档的写法，也可以参考

man teamd.conf帮助内容

[[email protected] ~]# cd /usr/share/doc/teamd-1.25/

[[email protected] teamd-1.25]# ls

COPYING  example_configs  example_ifcfgs

[[email protected] teamd-1.25]# cd example_configs/

[[email protected] example_configs]# ls

activebackup_arp_ping_1.conf  activebackup_ethtool_3.conf    broadcast.conf      loadbalance_3.conf

activebackup_arp_ping_2.conf  activebackup_multi_lw_1.conf   lacp_1.conf         random.conf

activebackup_ethtool_1.conf   activebackup_nsna_ping_1.conf  loadbalance_1.conf  roundrobin_2.conf

activebackup_ethtool_2.conf   activebackup_tipc.conf         loadbalance_2.conf  roundrobin.conf

[[email protected] example_configs]#

（2）、runners available are listed below（配置时‘-‘去除输入）

broadcast (data is transmitted over all ports)

round-robin (data is transmitted over all ports in turn)

active-backup (one port or link is used while others are kept as a backup)

loadbalance (with active Tx load balancing and BPF-based Tx port selectors)

lacp (implements the 802.3ad Link Aggregation Control Protocol)

本文出自 “技术成就梦想！” 博客，请务必保留此出处http://dreamsanqin.blog.51cto.com/845412/1885538