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Description of problem: Can not ping node tunnel’s ip address after updating hostSubnetLength Version-Release number of selected component (if applicable): oc v3.4.0.23+24b1a58 kubernetes v1.4.0+776c994 Server https://dhcp-41-65.bos.redhat.com:8443 openshift v3.4.0.23+24b1a58 kubernetes v1.4.0+776c994 How reproducible: Most time. Steps to Reproduce: 1. Cluster start up with below configuration: clusterNetworkCIDR: 10.1.0.0/16 hostSubnetLength: 8 2. Check both tunnel’s ip address in both master and node master: 10.1.1.1/24 node: 10.1.0.1/24 3. From master ping node tunnel’s ip address passed: [root@dhcp-41-65 master]# ping 10.1.0.1 PING 10.1.0.1 (10.1.0.1) 56(84) bytes of data. 64 bytes from 10.1.0.1: icmp_seq=1 ttl=64 time=0.992 ms 64 bytes from 10.1.0.1: icmp_seq=2 ttl=64 time=0.370 ms [root@dhcp-41-65 master]# arp Address HWtype HWaddress Flags Mask Iface 10.1.0.1 ether 06:56:71:ed:44:96 C tun0 dhcp-41-64.bos.redhat.c ether 52:54:00:c5:bc:5d C eth0 gateway ether 40:b4:f0:c4:e0:81 C eth0 dhcp-41-151.bos.redhat. ether 50:7b:9d:27:b4:65 C eth0 4. Follow steps from https://github.com/openshift/openshift-docs/pull/3112 to change clusterNetworkCIDR and hostsubnetlength. clusterNetworkCIDR: 10.1.0.0/16 hostSubnetLength: 6 5. Check both tunnel’s ip address in both master and node master: 10.1.0.1/26 node: 10.1.1.1/26 6. From master ping node tunnel’s ip address failed: [root@dhcp-41-65 master]# ping 10.1.1.1 PING 10.1.1.1 (10.1.1.1) 56(84) bytes of data. From 10.1.0.1 icmp_seq=1 Destination Host Unreachable From 10.1.0.1 icmp_seq=2 Destination Host Unreachable From 10.1.0.1 icmp_seq=3 Destination Host Unreachable From 10.1.0.1 icmp_seq=4 Destination Host Unreachable From 10.1.0.1 icmp_seq=5 Destination Host Unreachable From 10.1.0.1 icmp_seq=6 Destination Host Unreachable [root@dhcp-41-65 master]# arp Address HWtype HWaddress Flags Mask Iface 10.1.1.1 (incomplete) tun0 dhcp-41-64.bos.redhat.c ether 52:54:00:c5:bc:5d C eth0 gateway ether 40:b4:f0:c4:e0:81 C eth0 dhcp-41-151.bos.redhat. ether 50:7b:9d:27:b4:65 C eth0 [root@dhcp-41-65 master]# 7. Rebooting both master and node will recover ping and arp table. [root@dhcp-41-65 master]# reboot PolicyKit daemon disconnected from the bus. We are no longer a registered authentication agent. Connection to 10.18.41.65 closed by remote host. Connection to 10.18.41.65 closed. [weliang@dhcp-41-24 ~]$ ssh root.41.65 root.41.65's password: Last login: Tue Nov 8 14:59:48 2016 from dhcp-41-151.bos.redhat.com *************************** *************************** ** weliang-rhel72-vm1 *************************** *************************** [root@dhcp-41-65 ~]# arp Address HWtype HWaddress Flags Mask Iface gateway ether 40:b4:f0:c4:e0:81 C eth0 dhcp-41-151.bos.redhat. ether 50:7b:9d:27:b4:65 C eth0 dhcp-41-64.bos.redhat.c ether 52:54:00:c5:bc:5d C eth0 [root@dhcp-41-65 ~]# ping 10.1.1.1 PING 10.1.1.1 (10.1.1.1) 56(84) bytes of data. 64 bytes from 10.1.1.1: icmp_seq=1 ttl=64 time=1.08 ms 64 bytes from 10.1.1.1: icmp_seq=2 ttl=64 time=0.219 ms 64 bytes from 10.1.1.1: icmp_seq=3 ttl=64 time=0.319 ms 64 bytes from 10.1.1.1: icmp_seq=4 ttl=64 time=0.382 ms ^C --- 10.1.1.1 ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3001ms rtt min/avg/max/mdev = 0.219/0.501/1.084/0.341 ms [root@dhcp-41-65 ~]# arp Address HWtype HWaddress Flags Mask Iface gateway ether 40:b4:f0:c4:e0:81 C eth0 10.1.1.1 ether da:c2:03:50:47:6b C tun0 dhcp-41-151.bos.redhat. ether 50:7b:9d:27:b4:65 C eth0 dhcp-41-64.bos.redhat.c ether 52:54:00:c5:bc:5d C eth0 [root@dhcp-41-65 ~]# Actual results: Can not ping node tunnel’s ip address after updating hostSubnetLength Expected results: Still can ping node tunnel’s ip address after updating hostSubnetLength Additional info:
I don't think it makes sense to file bugs about problems you find with the renumbering PR; what you're describing here is not a bug in OpenShift, it's a problem with the procedure documented in that PR. So just add comments there describing the problems you find.