yahoo-eng-team team mailing list archive

[Thomas Morin <1622644@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

The ryu-based OVS agent variant forces the bridge Openflow version to 1.3 only [1], which breaks a few things:
- troubleshooting tools relying on ovs-ofctl, unless they specify "-O Openflow13", will break:
  version negotiation failed (we support version 0x01, peer supports version 0x04)
  ovs-ofctl: br-tun: failed to connect to socket (Broken pipe)

- calling add_flow on an OVSCookieBridge derived from a bridge that is
an native.ovs_bridge.OVSAgentBridge, will fail with the same error,
because add_flow will call ovs-ofctl without specifying "-O Openflow13"
(this issue is currently hitting networking-bgpvpn: [2])

It seems like a possible fix would be to not restrict the set of
Openflow versions supported by the bridge to Openflow13, but to just
*add* Openflow13 to the set of supported versions.

[1] https://github.com/openstack/neutron/blob/master/neutron/plugins/ml2/drivers/openvswitch/agent/openflow/native/ovs_bridge.py#L78
[2] https://github.com/openstack/networking-bagpipe/blob/master/networking_bagpipe/agent/bagpipe_bgp_agent.py#L512

** Affects: bgpvpn
     Importance: Undecided
         Status: New

** Affects: networking-bagpipe
     Importance: Undecided
         Status: New

** Affects: neutron
     Importance: Undecided
         Status: New

** Also affects: neutron
   Importance: Undecided
       Status: New

** Also affects: networking-bagpipe
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1622644

Title:
  OVS agent ryu/native implementation breaks non-OF1.3 uses

Status in networking-bgpvpn:
  New
Status in BaGPipe:
  New
Status in neutron:
  New

Bug description:
  The ryu-based OVS agent variant forces the bridge Openflow version to 1.3 only [1], which breaks a few things:
  - troubleshooting tools relying on ovs-ofctl, unless they specify "-O Openflow13", will break:
    version negotiation failed (we support version 0x01, peer supports version 0x04)
    ovs-ofctl: br-tun: failed to connect to socket (Broken pipe)

  - calling add_flow on an OVSCookieBridge derived from a bridge that is
  an native.ovs_bridge.OVSAgentBridge, will fail with the same error,
  because add_flow will call ovs-ofctl without specifying "-O
  Openflow13"  (this issue is currently hitting networking-bgpvpn: [2])

  It seems like a possible fix would be to not restrict the set of
  Openflow versions supported by the bridge to Openflow13, but to just
  *add* Openflow13 to the set of supported versions.

  [1] https://github.com/openstack/neutron/blob/master/neutron/plugins/ml2/drivers/openvswitch/agent/openflow/native/ovs_bridge.py#L78
  [2] https://github.com/openstack/networking-bagpipe/blob/master/networking_bagpipe/agent/bagpipe_bgp_agent.py#L512

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