为什么切换IPVS呢，两点原因：第一是IPVS性能好（PS：就几千台Pod没感觉到），第二是因为iptables每次重启完就要处理下FORWARD链的问题，烦得很
1、检查内核是否支持ipvs
# lsmod|grep ip_vs
2、如果没有就加载
modprobe -- ip_vs modprobe -- ip_vs_rr modprobe -- ip_vs_wrr modprobe -- ip_vs_sh modprobe -- nf_conntrack_ipv4
3、安装ipvs
# yum install ipvsadm ipset -y
4、修改kube-proxy配置
# kubectl edit configmap kube-proxy -n kube-system
metricsBindAddress: “”
mode: “”
nodePortAddresses: null
改为
metricsBindAddress: “”
mode: “ipvs”
nodePortAddresses: null
5、删除kube-proxy
到了最蛋疼的时候了，按理说编辑了配置文件应该立即生效的，但是怎么查看都还是原来的配置，最后不得已删除了pod
# kubectl delete pod kube-proxy-sjgjc -n kube-system
# kubectl logs kube-proxy-zdvgm -n kube-system
自此，再也不用折腾这个破FORWARD链了
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