配置聚合鏈路

4案例4：配置聚合鏈路

4.1問題

本例要求在兩個虛擬機server0、desktop0之間配置一個鏈路，要求如下：

1. 此鏈路使用接口eth1和eth2
2. 此鏈路在其中一個接口失效時仍然能工作
3. 此鏈路在server0上使用下面的地址172.16.3.20/255.255.255.0
4. 此鏈路在desktop0上使用下面的地址172.16.3.25/255.255.255.0
5. 此鏈路在系統重啓之後依然保持正常狀態

4.2方案

聚合鏈路（team）：指的是網絡連接的捆綁/組隊，通過將多個實際網卡（team-slave）整個爲邏輯上的單個連接，實現負載均衡、熱備份的單塊網卡難以完成的功能。
聚合連接的類型：熱備份activebackup、輪詢負載均衡roundrobin
定義聚合連接的類型配置時，採用JSON語法標記，主要特點如下：

• 標記一個對象-----{對象}
• 每一個對象----- 名稱:值
• 每一個字符串----- “字符串”
  熱備份-聚合連接（activebackup）：

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

負載均衡-聚合連接（roundrobin）：

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

4.3步驟

除了所配置的IP地址不一樣之外，在server0、desktop0主機上的其他操作相同。此處僅列在server0上的配置過程。
實現此案例需要按照如下步驟進行。

步驟一：準備練習用網卡環境

新建的聚合鏈路將組合新增的兩塊網卡eth1、eth2。

[root@server0 ~]# 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
.. ..

步驟二：創建聚合連接配置

1）新建聚合連接

[root@server0 ~]# 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

[root@server0 ~]# nmcli  con  modify  team0  ipv4.method  manual  ipv4.addresses  '172.16.3.20/24'  connection.autoconnect  yes

3）新建聚合成員連接

[root@server0 ~]# nmcli  con  add  con-name  team0-p1  type  team-slave  ifname  eth1  master  team0
Connection 'team0-p1' (a62d23a2-9a2a-4855-8fbc-60ce1fd43f0b) successfully added.
[root@server0 ~]# nmcli  con  add  con-name  team0-p2  type  team-slave  ifname  eth2  master  team0
Connection 'team0-p2' (f4d4980e-8123-4840-89ac-1af148cc2eea) successfully added.

步驟三：激活聚合連接

1）激活聚合連接

[root@server0 ~]# nmcli  connection  up  team0
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/6)

2）激活聚合成員連接

[root@server0 ~]# nmcli  connection  up  team0-p1 
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/9)
[root@server0 ~]# nmcli  connection  up  team0-p2
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/10)

步驟三：確認聚合連接狀態

1）查看聚合連接地址

[root@server0 ~]# 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）查看聚合連接運行狀態

[root@server0 ~]# teamdctl  team0  state
setup:
  runner: activebackup                              //運行模式/類型
ports:
  eth1                                              //成員網卡1
    link watches:
      link summary: up
      instance[link_watch_0]:
        name: ethtool
        link: up
  eth2                                             //成員網卡2
    link watches:
      link summary: up
      instance[link_watch_0]:
        name: ethtool
        link: up
runner:
  active port: eth1                                  //當前活動的成員網卡