[Openstack] [Grizzly] All "flows" on compute-node disappear & all instances lost connectivity [URGENT]

Robert Collins robertc at robertcollins.net
Wed Oct 16 09:32:47 UTC 2013

We saw a similar thing in TripleO on Fedora machines with GRE blocked
by host firewalls. You might check that GRE packets are permitted.


On 16 October 2013 22:26, Chu Duc Minh <chu.ducminh at gmail.com> wrote:
> I use Quantum with VLAN and ip networknamespace.
> After update some packages, all cloud instances lost connectivity.
> I run "ovs-vsctl show" and "ovs-ofctl dump-flows br-int" on both
> quantum-node and compute-node to check.
> In Quantum node, everything is ok.
> root at quantum:/etc/init.d# ovs-ofctl dump-flows br-int
> NXST_FLOW reply (xid=0x4):
>  cookie=0x0, duration=3284.199s, table=0, n_packets=33404, n_bytes=2134467,
> priority=2,in_port=156 actions=drop
>  cookie=0x0, duration=3199.3s, table=0, n_packets=1593, n_bytes=101952,
> priority=3,in_port=156,dl_vlan=101 actions=mod_vlan_vid:14,NORMAL
>  cookie=0x0, duration=3090.599s, table=0, n_packets=1539, n_bytes=98496,
> priority=3,in_port=156,dl_vlan=114 actions=mod_vlan_vid:23,NORMAL
>  cookie=0x0, duration=3125.8s, table=0, n_packets=4036, n_bytes=257248,
> priority=3,in_port=156,dl_vlan=4 actions=mod_vlan_vid:21,NORMAL
> v.v...
> But in compute node, all my flows disappear:
> root at compute-01:~# ovs-ofctl dump-flows br-int
> NXST_FLOW reply (xid=0x4):
>  cookie=0x0, duration=604.009s, table=0, n_packets=12897, n_bytes=823626,
> priority=2,in_port=1 actions=drop
>  cookie=0x0, duration=604.591s, table=0, n_packets=0, n_bytes=0, priority=1
> actions=NORMAL
> I restarted nova-compute, quantum-plugin-openvswitch-agent. Also reboot
> compute node.
> But nothing can help.
> I checked log and did not found any error.
> Do you know a quick fix for situation like that?
> Thank you very much!
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Robert Collins <rbtcollins at hp.com>
Distinguished Technologist
HP Converged Cloud

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