eip 维护于每一个节点的 kube-ipvs0 dummy 网卡上，但是只有一个节点上的 metalLb speaker 会相应该 arp
root@xs4772:~# k get svc -A -o wide | grep LoadBalancer
default calico-nginx-lb-svc LoadBalancer 10.233.69.129 10.34.251.210 80:32354/TCP 24h app=calico-nginx
default lb-snat-ng-svc LoadBalancer 10.233.149.40 10.34.251.211 80:30424/TCP 28m app=lb-snat-ng
root@xs4772:~# ansible all -m shell -a "ip a | grep 10.34.251"
xs4772 | CHANGED | rc=0 >>
inet 10.34.251.21/24 brd 10.34.251.255 scope global bond0
inet 10.34.251.210/32 scope global kube-ipvs0
inet 10.34.251.211/32 scope global kube-ipvs0
xs4773 | CHANGED | rc=0 >>
inet 10.34.251.22/24 brd 10.34.251.255 scope global bond0
inet 10.34.251.210/32 scope global kube-ipvs0
inet 10.34.251.211/32 scope global kube-ipvs0
xs4774 | CHANGED | rc=0 >>
inet 10.34.251.23/24 brd 10.34.251.255 scope global bond0
inet 10.34.251.210/32 scope global kube-ipvs0
inet 10.34.251.211/32 scope global kube-ipvs0
