玩转Openvwitch第六站：Port和Bond
有关Interface，就不得不提Bond
Bond将设备用多个连接在一起，形成一个虚拟的连接，从而实现高可用性以及高吞吐量
很多别名：LACP Trunk, Bond, Etherchannel
LACP (Link Aggregation Control Protocol)
bond_mode
active-backup: 一个连接是active，其他的backup，当active失效的时候，backup顶上
balance-slb: 流量安装源MAC和output VLAN进行负载均衡
balance-tcp:必须在支持LACP协议的情况下才可以，可根据L2, L3, L4进行负载均衡
我们做个实验测试Bond
ovs-vsctl add-bond ubuntu_br bond0 first_br second_br
ovs-vsctl add-bond helloworld bond1 first_if second_if
ovs-vsctl set Port bond0 lacp=active
ovs-vsctl set Port bond1 lacp=active
查看Bond
查看LACP
root@popsuper1982:/home/openstack# ovs-appctl lacp/show
---- bond0 ----
status: active negotiated
sys_id: 2a:96:0e:c7:85:49
sys_priority: 65534
aggregation key: 7
lacp_time: slow
slave: first_br: current attached
port_id: 7
port_priority: 65535
may_enable: true
actor sys_id: 2a:96:0e:c7:85:49
actor sys_priority: 65534
actor port_id: 7
actor port_priority: 65535
actor key: 7
actor state: activity aggregation synchronized collecting distributing
partner sys_id: 72:d2:d3:59:8c:41
partner sys_priority: 65534
partner port_id: 3
partner port_priority: 65535
partner key: 3
partner state: activity aggregation synchronized collecting distributing
slave: second_br: current attached
port_id: 8
port_priority: 65535
may_enable: true
actor sys_id: 2a:96:0e:c7:85:49
actor sys_priority: 65534
actor port_id: 8
actor port_priority: 65535
actor key: 7
actor state: activity aggregation synchronized collecting distributing
partner sys_id: 72:d2:d3:59:8c:41
partner sys_priority: 65534
partner port_id: 4
partner port_priority: 65535
partner key: 3
partner state: activity aggregation synchronized collecting distributing
---- bond1 ----
status: active negotiated
sys_id: 72:d2:d3:59:8c:41
sys_priority: 65534
aggregation key: 3
lacp_time: slow
slave: first_if: current attached
port_id: 3
port_priority: 65535
may_enable: true
actor sys_id: 72:d2:d3:59:8c:41
actor sys_priority: 65534
actor port_id: 3
actor port_priority: 65535
actor key: 3
actor state: activity aggregation synchronized collecting distributing
partner sys_id: 2a:96:0e:c7:85:49
partner sys_priority: 65534
partner port_id: 7
partner port_priority: 65535
partner key: 7
partner state: activity aggregation synchronized collecting distributing
slave: second_if: current attached
port_id: 4
port_priority: 65535
may_enable: true
actor sys_id: 72:d2:d3:59:8c:41
actor sys_priority: 65534
actor port_id: 4
actor port_priority: 65535
actor key: 3
actor state: activity aggregation synchronized collecting distributing
partner sys_id: 2a:96:0e:c7:85:49
partner sys_priority: 65534
partner port_id: 8
partner port_priority: 65535
partner key: 7
partner state: activity aggregation synchronized collecting distributing
默认情况下bond_mode是active-backup模式，一开始active的是first_br和first_if
从192.168.100.100 ping 192.168.100.102，以及192.168.100.101 ping 192.168.100.103，都是从first_if通过
如果把first_if设成down，则包的走向会变
ip link set first_if down
发现second_if开始有流量，京first_if变成down, 192.168.100.100和192.168.100.101似乎没有收到影响
second_br和second_if变成active
重启first_if，但是second_br和second_if仍然是active
ip link set first_if up
把bond_mode设为balance-slb
ovs-vsctl set Port bond0 bond_mode=balance-slb
ovs-vsctl set Port bond1 bond_mode=balance-slb
同时192.168.100.100 ping 192.168.100.102,192.168.100.101 ping 192.168.100.103, 已经分流了
把bond_mode设为balance-tcp
ovs-vsctl set Port bond0 bond_mode=balance-tcp
ovs-vsctl set Port bond1 bond_mode=balance-tcp
同时在192.168.100.100上：netperf -H 192.168.100.102 -t UDP_STREAM -- -m 1024
在192.168.100.101上： netperf -H 192.168.100.103 -t UDP_STREAM -- -m 1024