Hello, I have a multi-node install of openstack havana. Until yesterday I had all the nodes and instances with proper connectivity, using FlatDHCPManager.
Today, when I tried to check connectivity, all compute hosts are unable to send a ping outside the machine. Curiously, the instances are still able to use the br100 and ping outside their respective hosts. Also, I am able to ping the host from outside. (i.e. ping works in reverse direction). ========= Ping from host(wind - eth0:10.10.1.13) to outside(10.10.1.10) ========== xxxx@wind:~$ ping 10.10.1.10 PING 10.10.1.10 (10.10.1.10) 56(84) bytes of data. >From 10.10.1.1 icmp_seq=1 Destination Host Unreachable >From 10.10.1.1 icmp_seq=2 Destination Host Unreachable >From 10.10.1.1 icmp_seq=3 Destination Host Unreachable It is curious that ping says "From 10.10.1.1". I am unable to understand this. It is as if br100 has taken over eth0 as the default interface. =========== route -n on host(wind) =========== ncsu@wind:~$ route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 192.168.1.10 0.0.0.0 UG 100 0 0 eth1 10.0.3.0 0.0.0.0 255.255.255.0 U 0 0 0 lxcbr0 10.10.1.0 0.0.0.0 255.255.255.0 U 0 0 0 br100 10.10.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1 ========================== relevant interface information for wind ============================= eth0 - 10.10.1.13/24 br100 - 10.10.1.1 eth1 - 192.168.1.13 (mgmt interface) I've tried restarting nova services and rebooting to no avail. I am unable to troubleshoot it. Any ideas? Naman ps: I did notice that I was tinkering with NATs and iptables before this happened.
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