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
[root@MiWiFi-R3-srv Desktop]# nmcli device status
DEVICE TYPE STATE CONNECTION
eno16777736 ethernet disconnected --
eno33554992 ethernet disconnected --
lo loopback unmanaged --
[root@MiWiFi-R3-srv Desktop]# nmcli connection show
NAME UUID TYPE DEVICE
[root@MiWiFi-R3-srv 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：
[root@MiWiFi-R3-srv 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
[root@MiWiFi-R3-srv 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
[root@MiWiFi-R3-srv 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
[root@MiWiFi-R3-srv network-scripts]#
再次查看当前connection状态。
[root@MiWiFi-R3-srv 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。
[root@MiWiFi-R3-srv 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。
[root@MiWiFi-R3-srv 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
[root@MiWiFi-R3-srv 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
[root@MiWiFi-R3-srv ~]# teamnl team0 ports
3: eno33554992: up 1000Mbit FD
2: eno16777736: up 1000Mbit FD
[root@MiWiFi-R3-srv ~]#
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。
[root@MiWiFi-R3-srv Desktop]# nmcli device disconnect eno16777736
Device 'eno16777736' successfully disconnected.
[root@MiWiFi-R3-srv Desktop]#
[root@MiWiFi-R3-srv 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
[root@MiWiFi-R3-srv Desktop]# nmcli device status
DEVICE TYPE STATE CONNECTION
eno33554992 ethernet connected myteam0-port2
team0 team connected myteam0
eno16777736 ethernet disconnected --
lo loopback unmanaged --
[root@MiWiFi-R3-srv Desktop]#
[root@MiWiFi-R3-srv 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
[root@MiWiFi-R3-srv 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。
[root@MiWiFi-R3-srv Desktop]# nmcli connection down myteam0
Connection 'myteam0' successfully deactivated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/9)
[root@MiWiFi-R3-srv 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 --
[root@MiWiFi-R3-srv Desktop]# nmcli device status
DEVICE TYPE STATE CONNECTION
eno16777736 ethernet disconnected --
eno33554992 ethernet disconnected --
lo loopback unmanaged --
[root@MiWiFi-R3-srv Desktop]# nmcli connection up myteam0-port1
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/12)
[root@MiWiFi-R3-srv Desktop]# nmcli connection up myteam0-port2
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/14)
[root@MiWiFi-R3-srv Desktop]# nmcli connection up myteam0
Connection successfully activated (master waiting for slaves) (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/15)
[root@MiWiFi-R3-srv 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 --
[root@MiWiFi-R3-srv 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
[root@MiWiFi-R3-srv 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
[root@MiWiFi-R3-srv 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
[root@MiWiFi-R3-srv ~]# cd /usr/share/doc/teamd-1.25/
[root@MiWiFi-R3-srv teamd-1.25]# ls
COPYING example_configs example_ifcfgs
[root@MiWiFi-R3-srv teamd-1.25]# cd example_configs/
[root@MiWiFi-R3-srv 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
[root@MiWiFi-R3-srv 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)
转载于:https://blog.51cto.com/369day/1885538
