Description of problem: kube-proxy constantly generating error: May 12 23:20:58 localhost kube-proxy[2470]: E0512 23:20:58.113414 2470 proxier.go:1667] Failed to execute iptables-restore: exit status 1 (iptables-restore: invalid option -- '5' May 12 23:20:58 localhost kube-proxy[2470]: Try `iptables-restore -h' for more information. May 12 23:20:58 localhost kube-proxy[2470]: ) May 12 23:21:28 localhost kube-proxy[2470]: E0512 23:21:28.128008 2470 proxier.go:1667] Failed to execute iptables-restore: exit status 1 (iptables-restore: invalid option -- '5' May 12 23:21:28 localhost kube-proxy[2470]: Try `iptables-restore -h' for more information. May 12 23:21:28 localhost kube-proxy[2470]: ) Version-Release number of selected component (if applicable): # rpm -q -a | grep kube kubernetes-master-1.9.3-1.fc28.x86_64 kubernetes-client-1.9.3-1.fc28.x86_64 kubernetes-1.9.3-1.fc28.x86_64 kubernetes-node-1.9.3-1.fc28.x86_64 # uname -a Linux dhcp053.jenika.com 4.16.3-301.fc28.x86_64 #1 SMP Mon Apr 23 21:59:58 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux How reproducible: Basic fedora 28 server install then install kuberneetes and monitor logs. Steps to Reproduce: 1. dnf -y install kubernetes etcd flannel 2. systemctl mask firewalld 3. systemctl stop firewalld 4. systemctl start etcd 5. systemctl start kube-apiserver 6. systemctl start kube-controller-manager 7. systemctl start kube-scheduler 8. vi /root/flannel-config.json { "Network": "18.16.0.0/16", "SubnetLen": 24, "Backend": { "Type": "vxlan", "VNI": 1 } } 9. etcdctl set /atomic.io/network/config </root/flannel-config.json 10. systemctl start kube-proxy 11. tail -f /var/log/messages Actual results: Get the above errors in log. Expected results: Errors not generated in log. Additional info: I believe because of the above I'm unable to get proper flannel networking working in a cluster: single master, 2 nodes. This may or may not help but it seems to talk about the same issue: https://github.com/kubernetes/kubernetes/issues/58956
kubernetes-1.10.1-0.fc28 has been submitted as an update to Fedora 28. https://bodhi.fedoraproject.org/updates/FEDORA-2018-9b965c4eed
https://github.com/kubernetes/kubernetes/pull/61734 is already part of v1.10.1. Can you test the latest build and verify if it works for you?
kubernetes-1.10.1-0.fc28 has been pushed to the Fedora 28 stable repository. If problems still persist, please make note of it in this bug report.
Looks good to me.