在用magnum部署k8s集群时,发现部署出来一个负载均衡器,特研究了下这个neutron的这个服务,特记录下.

1  .lbaas v2架构如下(摘自官网)

在使用的service_provider为haproxy的时候,我理解如下:

Load balancer     #对应于一个运行在qlbaas-<xxxid>的namespace下的haproxy进程

The load balancer occupies a neutron network port and has an IP addressassigned from a subnet.

Listener     #对应于hapro进程配置文件的frontend里面的bind

Load balancers can listen for requests on multiple ports. Each one of thoseports is specified by a listener.

Pool       #对应于hapro进程配置文件的backend

A pool holds a list of members that serve content through the load balancer.

Member   #对应于hapro进程配置文件里面backend下面的server

Members are servers that serve traffic behind a load balancer. Each memberis specified by the IP address and port that it uses to serve traffic.

Health monitor    #对应于haproxy的健康检查

Members may go offline from time to time and health monitors divert trafficaway from members that are not responding properly. Health monitors areassociated with pools.

以一个uuid为ace6a125-1a8e-4fcc-a6fb-832dbb4b76c1的Load balancer为例

查看此Load balancer的配置文件

2   lb的高可用

     每个lb的高可用,底层是用keepalive实现的，配置文件实例如下

参考 https://docs.openstack.org/mitaka/networking-guide/config-lbaas.html