k8s version: 1.20.1flannelcni网络插件
解决:在node节点执行cat /var/run/flannel/subnet.envFLANNEL_NETWORK=10.244.0.0/16FLANNEL_SUBNET=10.244.8.1/24FLANNEL_MTU=1450FLANNEL_IPMASQ=true
执行iptables -t nat -I POSTROUTING -s 10.244.0.0/16 -j MASQUERADE