NIC Bonding on CentOS 7 with nmcli

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NIC Bonding on CentOS 7 with nmcli

当系统管理员希望增加可用带宽，并提供冗余和负载平衡的数据传输，内核支持bonding允许以聚合的方式实现。简单地说，绑定意味着将两个或多个物理网络接口（称为奴隶）聚合成一个单独的逻辑节点（称为主网络）。如果一个特定的NIC（网络接口卡）的经验问题，通信不受影响只要其他保持活跃。

1.先决条件

默认情况下，bonding内核模块没有启用。因此，我们将需要加载它并确保它持久。使用modprobe--first-time加载bonding模块，如果加载模块失败，会发出警告。

# modprobe --first-time bonding

以上的命令仅加载bondiing模块为当前会话，服务器重启后模块不会自动加载。为了确保持续加载，创建/etc/modules-load.d/bonding.conf文件放置于文件夹/etc/modules-load.d目录中，确保每次服务器重启时加载bonding模块。

# echo "# Load thebonding kernel module at boot" > /etc/modules-load.d/bonding.conf

# echo "bonding">> /etc/modules-load.d/bonding.conf

服务器重启之后确保bonding模块自动加载

# lsmod|grep bonding

bonding              136705  0

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2、nucli创建bond

查看现有连接及可用的网络设备

# nmcli connection show
NAME  UUID  TYPE  DEVICE
# nmcli device status
DEVICE       TYPE      STATE         CONNECTION
eno16777736  ethernet  disconnected  --         
eno33554992  ethernet  disconnected  --         
bond0        bond      unmanaged     --         
lo           loopback  unmanaged     --         
#   
创建bond  
# nmcli con add type bond con-name bond0 ifname bond0 ip4 192.168.31.108/24 mode balance-rr
Connection 'bond0' (599582b0-346b-48d3-8f1d-f3bcee5deca7) successfully added.
# nmcli connection add type bond-slave con-name slave1 ifname eno16777736 master bond0
Connection 'slave1' (6a1dd331-bb90-4e92-9af6-654ed8b2d2ca) successfully added.
# nmcli connection add type bond-slave con-name slave2 ifname eno33554992 master bond0
Connection 'slave2' (e31f40c9-4a1c-45d5-9832-8a1705f0b1f7) successfully added.
#nmcli con mod bond0 ipv4.method manual
#nmcli con mod bond0 ipv4.gateway 192.168.31.1
#nmcli connection modify bond0 ipv4.dns 192.168.31.1
#nmcli connection modify bond0 bond.options mode=balance-rr,miimon=100,downdelay=0,updelay=0
创建后重启网络服务
#systemctl restart network
# nmcli device status
DEVICE       TYPE      STATE      CONNECTION
bond0        bond      connected  bond0      
eno16777736  ethernet  connected  slave1     
eno33554992  ethernet  connected  slave2     
lo           loopback  unmanaged  --     
再次查看网络链接与网络设备   
# nmcli connection show
NAME    UUID                                  TYPE            DEVICE      
bond0   599582b0-346b-48d3-8f1d-f3bcee5deca7  bond            bond0      
slave1  6a1dd331-bb90-4e92-9af6-654ed8b2d2ca  802-3-ethernet  eno16777736
slave2  e31f40c9-4a1c-45d5-9832-8a1705f0b1f7  802-3-ethernet  eno33554992
# ip addr list
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,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UP qlen 1000
    link/ether 00:0c:29:51:e8:75 brd ff:ff:ff:ff:ff:ff
3: eno33554992: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master bond0 state UP qlen 1000
    link/ether 00:0c:29:51:e8:75 brd ff:ff:ff:ff:ff:ff
4: bond0: <BROADCAST,MULTICAST,MASTER,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 bond0
       valid_lft forever preferred_lft forever
    inet6 fe80::233b:2da9:bddd:c8dc/64 scope link tentative dadfailed
       valid_lft forever preferred_lft forever
    inet6 fe80::875c:5f79:646d:8446/64 scope link tentative dadfailed
       valid_lft forever preferred_lft forever
    inet6 fe80::bf1c:1978:9c5:6ed7/64 scope link tentative dadfailed
       valid_lft forever preferred_lft forever
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