red hat部署原理（redhat7网卡bond配置主备模式及LACP模式）
red hat部署原理（redhat7网卡bond配置主备模式及LACP模式）# cat /proc/net/bonding/bond0 Ethernet Channel Bonding Driver: v3.7.1 (April 27 2011) Bonding Mode: fault-tolerance (active-backup) #主备模式 Primary Slave: None Currently Active Slave: eno50332208 MII Status: up MII Polling Interval (ms): 100 Up Delay (ms): 0 Down Delay (ms): 0 Slave Interface: eno50332208 MII Status: up Speed: 1000 Mbps Duplex: full Link Failure Count: 0 Permanent HW addr: 00
项目中经常碰到网卡绑定的场景，下面记录一下linux7上通过bond实现网卡的高可用，常见的bond模式如下，我们在项目实施过程总常用到的是mode1（主备）不需要交换机端配置及mode4 （lacp）需要交换机端做响应配置。
bonding的七种工作模式:
bonding技术提供了七种工作模式，在使用的时候需要指定一种，每种有各自的优缺点.
balance-rr (mode=0) 默认 有高可用 (容错) 和负载均衡的功能 需要交换机的配置，每块网卡轮询发包 (流量分发比较均衡).
active-backup (mode=1) 只有高可用 (容错) 功能 不需要交换机配置 这种模式只有一块网卡工作 对外只有一个mac地址。缺点是端口利用率比较低
balance-xor (mode=2) 不常用
broadcast (mode=3) 不常用
802.3ad (mode=4) IEEE 802.3ad 动态链路聚合，需要交换机配置
balance-tlb (mode=5) 不常用
balance-alb (mode=6) 有高可用 ( 容错 )和负载均衡的功能，不需要交换机配置 (流量分发到每个接口不是特别均衡)
主备方式的绑定步骤：
- 1、删除原有网卡的profile
### on RHEL7.0 use this:
# for connection in $(nmcli -t --fields name device connection | awk -F ":" '($2 ~ "ens{22 33}") {print $1}') ; do \
nmcli connection delete $connection ; done
# nmcli connection reload
### on RHEL7.2 use this instead accounting to a different output syntax of "nmcli":
# for connection in $(nmcli -t --fields name device connection | awk -F ":" '($1 ~ "ens[22 33]") {print $1}') ; do \
nmcli connection delete $connection ; done
# nmcli connection reload
或者手动删除 查看当前的连接，本次实验的两块网卡是eno50332208及eno33554984
[root@sourcedb network-scripts]# nmcli connection show
NAME UUID TYPE DEVICE
virbr0 fc80e2e4-63fa-43ee-9937-016b24bd14c4 bridge virbr0
eno16777736 01698412-b602-401c-bcfc-d7d2d3d83107 802-3-ethernet eno16777736
eno50332208 5b70dc08-5b99-430b-856b-d9706ce17993 802-3-ethernet --
eno33554984 0b978ce7-510a-46ab-8a70-e4567e064683 802-3-ethernet --
如果profile不存在可以不执行删除操作。
此处执行删除操作
# nmcli connection delete eno50332208
# nmcli connection delete eno33554984
创建bond（主备模式）
### With a static IP of 192.168.1.10/24 and gateway of 192.168.1.1:
# nmcli connection add type bond ifname bond0 con-name bond0 mode active-backup MIImon 100 ip4 192.168.1.10/24 gw4 192.168.1.1
添加slave profile，ifname是真实设备名称 con-name可以自己定义
# nmcli connection add type bond-slave ifname eno50332208 con-name eno50332208 master bond0
# nmcli connection add type bond-slave ifname eno33554984 con-name eno33554984 master bond0
查看当前连接
# nmcli connection show
NAME UUID TYPE DEVICE
bond0 f00f0026-49d3-4eee-9b66-9331a007e828 bond bond0
eno50332208 5b70dc08-5b99-430b-856b-d9706ce17993 802-3-ethernet eno50332208
eno33554984 0b978ce7-510a-46ab-8a70-e4567e064683 802-3-ethernet eno33554984
查看绑定状态
# cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v3.7.1 (April 27 2011)
Bonding Mode: fault-tolerance (active-backup) #主备模式
Primary Slave: None
Currently Active Slave: eno50332208
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0
Slave Interface: eno50332208
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:25:08:1c
Slave queue ID: 0
Slave Interface: eno33554984
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:25:08:12
Slave queue ID: 0
[root@sourcedb network-scripts]#
ip a查看当前的网卡mac地址已变为一致。
以上完成了主备模式的网卡绑定。如果我们想修改网卡的绑定模式为mode4即lacp模式呢?执行如下命令进行修改;
# nmcli connection modify bond0 bond.options mode=4
# service network restart
Restarting network (via systemctl): [ OK ]
# cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v3.7.1 (April 27 2011)
Bonding Mode: IEEE 802.3ad Dynamic link aggregation #已经修改为lacp了
Transmit Hash Policy: layer2 (0)
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0
802.3ad info
LACP rate: slow
Min links: 0
Aggregator selection policy (ad_select): stable
Active Aggregator Info:
Aggregator ID: 1
Number of ports: 1
Actor Key: 9
Partner Key: 1
Partner Mac Address: 00:00:00:00:00:00
Slave Interface: eno33554984
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:25:08:12
Slave queue ID: 0
Aggregator ID: 1
Actor Churn State: monitoring
Partner Churn State: monitoring
Actor Churned Count: 0
Partner Churned Count: 0
details actor lacp pdu:
system priority: 65535
port key: 9
port priority: 255
port number: 1
port state: 205
details partner lacp pdu:
system priority: 65535
oper key: 1
port priority: 255
port number: 1
port state: 3
Slave Interface: eno50332208
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:25:08:1c
Slave queue ID: 0
Aggregator ID: 2
Actor Churn State: monitoring
Partner Churn State: monitoring
Actor Churned Count: 0
Partner Churned Count: 0
details actor lacp pdu:
system priority: 65535
port key: 9
port priority: 255
port number: 2
port state: 197
details partner lacp pdu:
system priority: 65535
oper key: 1
port priority: 255
port number: 1
port state: 3
配置lacp模式命令如下，指定关键字mode为802.3ad
# nmcli connection delete bond0 #删除原有配置
#nmcli connection delete eno50332208
# nmcli connection delete eno33554984
# nmcli connection add type bond ifname bond0 con-name bond0 mode 802.3ad miimon 100 ip4 192.168.1.10/24 gw4 192.168.1.1
# nmcli connection add type bond-slave ifname eno50332208 con-name eno50332208 master bond0
# nmcli connection add type bond-slave ifname eno33554984 con-name eno33554984 master bond0
# nmcli connection up bond0
# cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v3.7.1 (April 27 2011)
Bonding Mode: IEEE 802.3ad Dynamic link aggregation
Transmit Hash Policy: layer2 (0)
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0
802.3ad info
LACP rate: slow
Min links: 0
Aggregator selection policy (ad_select): stable
Active Aggregator Info:
Aggregator ID: 3
Number of ports: 1
Actor Key: 9
Partner Key: 1
Partner Mac Address: 00:00:00:00:00:00
Slave Interface: eno33554984
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:25:08:12
Slave queue ID: 0
Aggregator ID: 3
Actor Churn State: monitoring
Partner Churn State: monitoring
Actor Churned Count: 0
Partner Churned Count: 0
details actor lacp pdu:
system priority: 65535
port key: 9
port priority: 255
port number: 1
port state: 205
details partner lacp pdu:
system priority: 65535
oper key: 1
port priority: 255
port number: 1
port state: 3
Slave Interface: eno50332208
MII Status: up
Speed: 1000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:0c:29:25:08:1c
Slave queue ID: 0
Aggregator ID: 4
Actor Churn State: monitoring
Partner Churn State: monitoring
Actor Churned Count: 0
Partner Churned Count: 0
details actor lacp pdu:
system priority: 65535
port key: 9
port priority: 255
port number: 2
port state: 197
details partner lacp pdu:
system priority: 65535
oper key: 1
port priority: 255
port number: 1
port state: 3
