配置聚合链路

4案例4：配置聚合链路

4.1问题

本例要求在两个虚拟机server0、desktop0之间配置一个链路，要求如下：

1. 此链路使用接口eth1和eth2
2. 此链路在其中一个接口失效时仍然能工作
3. 此链路在server0上使用下面的地址172.16.3.20/255.255.255.0
4. 此链路在desktop0上使用下面的地址172.16.3.25/255.255.255.0
5. 此链路在系统重启之后依然保持正常状态

4.2方案

聚合链路（team）：指的是网络连接的捆绑/组队，通过将多个实际网卡（team-slave）整个为逻辑上的单个连接，实现负载均衡、热备份的单块网卡难以完成的功能。

聚合连接的类型：热备份activebackup、轮询负载均衡roundrobin

定义聚合连接的类型配置时，采用JSON语法标记，主要特点如下：

• 标记一个对象-----{对象}
• 每一个对象----- 名称:值

• 每一个字符串----- “字符串”

  热备份-聚合连接（activebackup）：

{ "runner":{ "name":"activebackup" }  }
           

负载均衡-聚合连接（roundrobin）：

{ "runner":{ "name":"roundrobin" }  }
           

4.3步骤

除了所配置的IP地址不一样之外，在server0、desktop0主机上的其他操作相同。此处仅列在server0上的配置过程。

实现此案例需要按照如下步骤进行。

步骤一：准备练习用网卡环境

新建的聚合链路将组合新增的两块网卡eth1、eth2。

[[email protected] ~]# ifconfig 
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 172.25.0.11  netmask 255.255.255.0  broadcast 172.25.0.255
        inet6 2003:ac18::305  prefixlen 64  scopeid 0x0<global>
        inet6 fe80::5054:ff:fe00:b  prefixlen 64  scopeid 0x20<link>
        ether 52:54:00:00:00:0b  txqueuelen 1000  (Ethernet)
        RX packets 172995  bytes 23870389 (22.7 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 54053  bytes 34274222 (32.6 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
eth1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether 52:54:00:f8:86:c1  txqueuelen 1000  (Ethernet)
        RX packets 104217  bytes 5437855 (5.1 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 171  bytes 17171 (16.7 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
eth2: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether 52:54:00:38:79:d9  txqueuelen 1000  (Ethernet)
        RX packets 104118  bytes 5428927 (5.1 MiB)
        RX errors 0  dropped 2060  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
.. ..
           

步骤二：创建聚合连接配置

1）新建聚合连接

[[email protected] ~]# nmcli  con  add  con-name  team0  type  team  ifname team0  config  '{ "runner":{ "name":"activebackup" }  }'
Connection 'team0' (8e61d730-50ff-4a7b-8ca0-fcf5955f6ea7) successfully added.
           

2）配置IPv4地址

[[email protected] ~]# nmcli  con  modify  team0  ipv4.method  manual  ipv4.addresses  '172.16.3.20/24'  connection.autoconnect  yes
           

3）新建聚合成员连接

[[email protected] ~]# nmcli  con  add  con-name  team0-p1  type  team-slave  ifname  eth1  master  team0
Connection 'team0-p1' (a62d23a2-9a2a-4855-8fbc-60ce1fd43f0b) successfully added.
[[email protected] ~]# nmcli  con  add  con-name  team0-p2  type  team-slave  ifname  eth2  master  team0
Connection 'team0-p2' (f4d4980e-8123-4840-89ac-1af148cc2eea) successfully added.
           

步骤三：激活聚合连接

1）激活聚合连接

[[email protected] ~]# nmcli  connection  up  team0
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/6)
           

2）激活聚合成员连接

[[email protected] ~]# nmcli  connection  up  team0-p1 
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/9)
[[email protected] ~]# nmcli  connection  up  team0-p2
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/10)
           

步骤三：确认聚合连接状态

1）查看聚合连接地址

[[email protected] ~]# ifconfig  team0
team0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 172.16.3.20  netmask 255.255.255.0  broadcast 172.16.3.255
        inet6 fe80::c80d:efff:fe08:ca57  prefixlen 64  scopeid 0x20<link>
        ether ca:0d:ef:08:ca:57  txqueuelen 0  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 36  overruns 0  frame 0
        TX packets 68  bytes 8695 (8.4 KiB)
        TX errors 0  dropped 1 overruns 0  carrier 0  collisions 0
           

2）查看聚合连接运行状态

[[email protected] ~]# teamdctl  team0  state
setup:
  runner: activebackup                              //运行模式/类型
ports:
  eth1                                              //成员网卡1
    link watches:
      link summary: up
      instance[link_watch_0]:
        name: ethtool
        link: up
  eth2                                             //成员网卡2
    link watches:
      link summary: up
      instance[link_watch_0]:
        name: ethtool
        link: up
runner:
  active port: eth1                                  //当前活动的成员网卡