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[Bug 2051869] [NEW] OVS DHCP-agent fail if not set network gateway for subnet

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: P <2051869@xxxxxxxxxxxxxxxxxx>
Date: Wed, 31 Jan 2024 17:50:19 -0000
Reply-to: Bug 2051869 <2051869@xxxxxxxxxxxxxxxxxx>
Sender: noreply@xxxxxxxxxxxxx
Public bug reported:

On compute openvswitch_agent.ini enable

extensions = dhcp

Create network and subnet without gateway
Create VM on new subnet and take error on neutron-openvswitch-agent


    2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager [req-eb166d63-24c1-4773-91c0-ec55ac904dfa - - - - -] DHCPv6Responder: Exception occurred during handler processing. Backtrace from offending handler [packet_in_handler] servicing event [EventOFPPacketIn] follows.: TypeError: unexpected type <class 'NoneType'> for addr arg
    2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager Traceback (most recent call last):
    2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager   File "/var/lib/kolla/venv/lib/python3.8/site-packages/os_ken/lib/addrconv.py", line 29, in text_to_bin
    2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager     return self._addr(text, **self._addr_kwargs).packed
    2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager   File "/var/lib/kolla/venv/lib/python3.8/site-packages/netaddr/ip/__init__.py", line 316, in __init__
    2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager     if 0 <= int(addr) <= self._module.max_int:
    2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager TypeError: int() argument must be a string, a bytes-like object or a number, not 'NoneType'
    2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager 
    2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager During handling of the above exception, another exception occurred:
    2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager 
    2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager Traceback (most recent call last):
    2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager   File "/var/lib/kolla/venv/lib/python3.8/site-packages/os_ken/base/app_manager.py", line 289, in _event_loop
    2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager     handler(ev)
    2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager   File "/var/lib/kolla/venv/lib/python3.8/site-packages/neutron/plugins/ml2/drivers/openvswitch/agent/openflow/native/base_oskenapp.py", line 38, in packet_in_handler
    2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager     caller(ev)
    2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager   File "/var/lib/kolla/venv/lib/python3.8/site-packages/neutron/agent/l2/extensions/dhcp/base.py", line 108, in _packet_in_handler
    2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager     self.handle_dhcp(datapath, of_in_port, pkt, port_info)
    2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager   File "/var/lib/kolla/venv/lib/python3.8/site-packages/neutron/agent/l2/extensions/dhcp/ipv4.py", line 210, in handle_dhcp
    2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager     self.assemble_offer(pkt, port_info))
    2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager   File "/var/lib/kolla/venv/lib/python3.8/site-packages/neutron/agent/l2/extensions/dhcp/ipv4.py", line 192, in assemble_offer
    2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager     offer = self.get_ret_packet(pkt, port_info)
    2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager   File "/var/lib/kolla/venv/lib/python3.8/site-packages/neutron/agent/l2/extensions/dhcp/ipv4.py", line 151, in get_ret_packet
    2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager     options = self.get_dhcp_options(port_info, is_ack)
    2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager   File "/var/lib/kolla/venv/lib/python3.8/site-packages/neutron/agent/l2/extensions/dhcp/ipv4.py", line 75, in get_dhcp_options
    2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager     bin_server = addrconv.ipv4.text_to_bin(gateway_ip)
    2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager   File "/var/lib/kolla/venv/lib/python3.8/site-packages/os_ken/lib/addrconv.py", line 36, in text_to_bin
    2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager     ip = self._fallback(text, **self._addr_kwargs)
    2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager   File "/var/lib/kolla/venv/lib/python3.8/site-packages/netaddr/ip/__init__.py", line 930, in __init__
    2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager     value, prefixlen = parse_ip_network(_ipv4, addr,
    2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager   File "/var/lib/kolla/venv/lib/python3.8/site-packages/netaddr/ip/__init__.py", line 831, in parse_ip_network
    2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager     raise TypeError('unexpected type %s for addr arg' % type(addr))
    2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager TypeError: unexpected type <class 'NoneType'> for addr arg

** Affects: neutron
     Importance: Undecided
         Status: New


** Tags: neutron ovs

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https://bugs.launchpad.net/bugs/2051869

Title:
  OVS DHCP-agent fail if not set network gateway for subnet

Status in neutron:
  New

Bug description:
  On compute openvswitch_agent.ini enable

  extensions = dhcp

  Create network and subnet without gateway
  Create VM on new subnet and take error on neutron-openvswitch-agent

  
      2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager [req-eb166d63-24c1-4773-91c0-ec55ac904dfa - - - - -] DHCPv6Responder: Exception occurred during handler processing. Backtrace from offending handler [packet_in_handler] servicing event [EventOFPPacketIn] follows.: TypeError: unexpected type <class 'NoneType'> for addr arg
      2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager Traceback (most recent call last):
      2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager   File "/var/lib/kolla/venv/lib/python3.8/site-packages/os_ken/lib/addrconv.py", line 29, in text_to_bin
      2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager     return self._addr(text, **self._addr_kwargs).packed
      2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager   File "/var/lib/kolla/venv/lib/python3.8/site-packages/netaddr/ip/__init__.py", line 316, in __init__
      2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager     if 0 <= int(addr) <= self._module.max_int:
      2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager TypeError: int() argument must be a string, a bytes-like object or a number, not 'NoneType'
      2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager 
      2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager During handling of the above exception, another exception occurred:
      2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager 
      2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager Traceback (most recent call last):
      2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager   File "/var/lib/kolla/venv/lib/python3.8/site-packages/os_ken/base/app_manager.py", line 289, in _event_loop
      2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager     handler(ev)
      2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager   File "/var/lib/kolla/venv/lib/python3.8/site-packages/neutron/plugins/ml2/drivers/openvswitch/agent/openflow/native/base_oskenapp.py", line 38, in packet_in_handler
      2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager     caller(ev)
      2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager   File "/var/lib/kolla/venv/lib/python3.8/site-packages/neutron/agent/l2/extensions/dhcp/base.py", line 108, in _packet_in_handler
      2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager     self.handle_dhcp(datapath, of_in_port, pkt, port_info)
      2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager   File "/var/lib/kolla/venv/lib/python3.8/site-packages/neutron/agent/l2/extensions/dhcp/ipv4.py", line 210, in handle_dhcp
      2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager     self.assemble_offer(pkt, port_info))
      2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager   File "/var/lib/kolla/venv/lib/python3.8/site-packages/neutron/agent/l2/extensions/dhcp/ipv4.py", line 192, in assemble_offer
      2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager     offer = self.get_ret_packet(pkt, port_info)
      2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager   File "/var/lib/kolla/venv/lib/python3.8/site-packages/neutron/agent/l2/extensions/dhcp/ipv4.py", line 151, in get_ret_packet
      2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager     options = self.get_dhcp_options(port_info, is_ack)
      2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager   File "/var/lib/kolla/venv/lib/python3.8/site-packages/neutron/agent/l2/extensions/dhcp/ipv4.py", line 75, in get_dhcp_options
      2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager     bin_server = addrconv.ipv4.text_to_bin(gateway_ip)
      2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager   File "/var/lib/kolla/venv/lib/python3.8/site-packages/os_ken/lib/addrconv.py", line 36, in text_to_bin
      2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager     ip = self._fallback(text, **self._addr_kwargs)
      2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager   File "/var/lib/kolla/venv/lib/python3.8/site-packages/netaddr/ip/__init__.py", line 930, in __init__
      2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager     value, prefixlen = parse_ip_network(_ipv4, addr,
      2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager   File "/var/lib/kolla/venv/lib/python3.8/site-packages/netaddr/ip/__init__.py", line 831, in parse_ip_network
      2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager     raise TypeError('unexpected type %s for addr arg' % type(addr))
      2024-01-31 13:10:06.492 7 ERROR os_ken.base.app_manager TypeError: unexpected type <class 'NoneType'> for addr arg

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