Public bug reported:
When there is router with subnet with enabled prefix delegation plugged
and L3 agent is restarted it's failing with error like:
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent [-] Failed to
process compatible router: 7ef0983f-60a4-4389-909c-785eb6c9a51e:
neutron.privileged.agent.linux.ip_lib.IpAddressAlreadyExists: IP address
fe80::f816:3eff:fec8:b9a8 already configured on qg-351b89d8-61.
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent Traceback (most
recent call last):
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/neutron/agent/l3/agent.py", line 694, in
_process_routers_if_compatible
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent
self._process_router_if_compatible(router)
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/neutron/agent/l3/agent.py", line 540, in
_process_router_if_compatible
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent
self._process_updated_router(router)
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/neutron/agent/l3/agent.py", line 581, in
_process_updated_router
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent ri.process()
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/neutron/common/utils.py", line 161, in call
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent self.logger(e)
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/oslo_utils/excutils.py", line 220, in __exit__
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent
self.force_reraise()
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/oslo_utils/excutils.py", line 196, in
force_reraise
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent
six.reraise(self.type_, self.value, self.tb)
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/six.py", line 693, in reraise
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent raise value
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/neutron/common/utils.py", line 158, in call
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent return
func(*args, **kwargs)
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/neutron/agent/l3/router_info.py", line 1191,
in process
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent
self.process_external()
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/neutron/agent/l3/router_info.py", line 949,
in process_external
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent
self._process_external_gateway(ex_gw_port)
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/neutron/agent/l3/router_info.py", line 833,
in _process_external_gateway
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent interface_name)
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/oslo_concurrency/lockutils.py", line 328, in
inner
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent return f(*args,
**kwargs)
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/neutron/agent/linux/pd.py", line 144, in
add_gw_interface
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent
self._add_lla(router, bind_lla_with_mask)
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/neutron/agent/linux/pd.py", line 220, in
_add_lla
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent 'link')
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/neutron/agent/linux/interface.py", line 208,
in add_ipv6_addr
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent
device.addr.add(str(net), scope)
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/neutron/agent/linux/ip_lib.py", line 508, in
add
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent add_broadcast)
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/neutron/agent/linux/ip_lib.py", line 872, in
add_ip_address
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent device,
namespace, scope, broadcast)
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/neutron/privileged/agent/linux/ip_lib.py",
line 50, in sync_inner
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent return
input_func(*args, **kwargs)
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/oslo_privsep/priv_context.py", line 244, in
_wrap
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent return
self.channel.remote_call(name, args, kwargs)
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/oslo_privsep/daemon.py", line 203, in
remote_call
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent raise
exc_type(*result[2])
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent
neutron.privileged.agent.linux.ip_lib.IpAddressAlreadyExists: IP address
fe80::f816:3eff:fec8:b9a8 already configured on qg-351b89d8-61.
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent
To workaround this problem I had to e.g. remove qrouter-XXX namespace
from the node and then restart L3 agent. In that case all was configured
without this error.
** Affects: neutron
Importance: Medium
Status: Confirmed
** Tags: l3-dvr-backlog
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https://bugs.launchpad.net/bugs/1892362
Title:
Restarting L3 agent when PD is used fails due to
IPAddressAlreadyExists error
Status in neutron:
Confirmed
Bug description:
When there is router with subnet with enabled prefix delegation
plugged and L3 agent is restarted it's failing with error like:
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent [-] Failed to
process compatible router: 7ef0983f-60a4-4389-909c-785eb6c9a51e:
neutron.privileged.agent.linux.ip_lib.IpAddressAlreadyExists: IP address
fe80::f816:3eff:fec8:b9a8 already configured on qg-351b89d8-61.
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent Traceback (most
recent call last):
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/neutron/agent/l3/agent.py", line 694, in
_process_routers_if_compatible
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent
self._process_router_if_compatible(router)
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/neutron/agent/l3/agent.py", line 540, in
_process_router_if_compatible
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent
self._process_updated_router(router)
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/neutron/agent/l3/agent.py", line 581, in
_process_updated_router
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent ri.process()
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/neutron/common/utils.py", line 161, in call
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent self.logger(e)
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/oslo_utils/excutils.py", line 220, in __exit__
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent
self.force_reraise()
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/oslo_utils/excutils.py", line 196, in
force_reraise
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent
six.reraise(self.type_, self.value, self.tb)
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/six.py", line 693, in reraise
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent raise value
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/neutron/common/utils.py", line 158, in call
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent return
func(*args, **kwargs)
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/neutron/agent/l3/router_info.py", line 1191,
in process
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent
self.process_external()
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/neutron/agent/l3/router_info.py", line 949,
in process_external
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent
self._process_external_gateway(ex_gw_port)
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/neutron/agent/l3/router_info.py", line 833,
in _process_external_gateway
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent
interface_name)
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/oslo_concurrency/lockutils.py", line 328, in
inner
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent return
f(*args, **kwargs)
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/neutron/agent/linux/pd.py", line 144, in
add_gw_interface
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent
self._add_lla(router, bind_lla_with_mask)
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/neutron/agent/linux/pd.py", line 220, in
_add_lla
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent 'link')
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/neutron/agent/linux/interface.py", line 208,
in add_ipv6_addr
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent
device.addr.add(str(net), scope)
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/neutron/agent/linux/ip_lib.py", line 508, in
add
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent add_broadcast)
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/neutron/agent/linux/ip_lib.py", line 872, in
add_ip_address
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent device,
namespace, scope, broadcast)
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/neutron/privileged/agent/linux/ip_lib.py",
line 50, in sync_inner
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent return
input_func(*args, **kwargs)
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/oslo_privsep/priv_context.py", line 244, in
_wrap
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent return
self.channel.remote_call(name, args, kwargs)
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent File
"/usr/lib/python3.6/site-packages/oslo_privsep/daemon.py", line 203, in
remote_call
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent raise
exc_type(*result[2])
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent
neutron.privileged.agent.linux.ip_lib.IpAddressAlreadyExists: IP address
fe80::f816:3eff:fec8:b9a8 already configured on qg-351b89d8-61.
2020-08-20 12:54:33.390 487489 ERROR neutron.agent.l3.agent
To workaround this problem I had to e.g. remove qrouter-XXX namespace
from the node and then restart L3 agent. In that case all was
configured without this error.
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