*** This bug is a duplicate of bug 1335023 ***
https://bugs.launchpad.net/bugs/1335023
Reviewed: https://review.openstack.org/233287
Committed:
https://git.openstack.org/cgit/openstack/neutron/commit/?id=b6126bc0f17f348ff6303b9bd6041cb018479ef9
Submitter: Jenkins
Branch: master
commit b6126bc0f17f348ff6303b9bd6041cb018479ef9
Author: Sreekumar S <[email protected]>
Date: Sat Oct 10 03:18:00 2015 +0530
Fix for adding gateway with IP outside subnet
Currently 'force_gateway_on_subnet' configuration is set to True
by default and enforces the subnet on to the gateway. With this
fix 'force_gateway_on_subnet' can be changed to False, and
gateway outside the subnet can be added.
Before adding the default route, a route to the gateway IP is
added. This applies to both external and internal networks.
This configuration option is deprecated, and should be removed
in a future release. It should always allow gateway outside the
subnet. This is done as a separate patch
https://review.openstack.org/#/c/277303/
Change-Id: I3a942cf98d263681802729cf09527f06c80fab2b
Closes-Bug: #1335023
Closes-Bug: #1398768
** Changed in: neutron
Status: In Progress => Fix Released
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https://bugs.launchpad.net/bugs/1398768
Title:
If we set a gateway outside subnet neutron-l3-agent fails when trying
to set the route in the virtual router.
Status in neutron:
Fix Released
Bug description:
014-11-30 16:25:10.113 8086 TRACE neutron.agent.l3_agent Traceback (most
recent call last):
2014-11-30 16:25:10.113 8086 TRACE neutron.agent.l3_agent File
"/usr/lib/python2.7/site-packages/neutron/common/utils.py", line 341, in call
2014-11-30 16:25:10.113 8086 TRACE neutron.agent.l3_agent return
func(*args, **kwargs)
2014-11-30 16:25:10.113 8086 TRACE neutron.agent.l3_agent File
"/usr/lib/python2.7/site-packages/neutron/agent/l3_agent.py", line 938, in
process_router
2014-11-30 16:25:10.113 8086 TRACE neutron.agent.l3_agent
self.external_gateway_added(ri, ex_gw_port, interface_name)
2014-11-30 16:25:10.113 8086 TRACE neutron.agent.l3_agent File
"/usr/lib/python2.7/site-packages/neutron/agent/l3_agent.py", line 1318, in
external_gateway_added
2014-11-30 16:25:10.113 8086 TRACE neutron.agent.l3_agent ri.ns_name,
preserve_ips)
2014-11-30 16:25:10.113 8086 TRACE neutron.agent.l3_agent File
"/usr/lib/python2.7/site-packages/neutron/agent/l3_agent.py", line 1362, in
_external_gateway_added
2014-11-30 16:25:10.113 8086 TRACE neutron.agent.l3_agent
preserve_ips=preserve_ips)
2014-11-30 16:25:10.113 8086 TRACE neutron.agent.l3_agent File
"/usr/lib/python2.7/site-packages/neutron/agent/linux/interface.py", line 120,
in init_l3
2014-11-30 16:25:10.113 8086 TRACE neutron.agent.l3_agent
device.route.add_gateway(gateway)
2014-11-30 16:25:10.113 8086 TRACE neutron.agent.l3_agent File
"/usr/lib/python2.7/site-packages/neutron/agent/linux/ip_lib.py", line 395, in
add_gateway
2014-11-30 16:25:10.113 8086 TRACE neutron.agent.l3_agent
self._as_root(*args)
2014-11-30 16:25:10.113 8086 TRACE neutron.agent.l3_agent File
"/usr/lib/python2.7/site-packages/neutron/agent/linux/ip_lib.py", line 242, in
_as_root
2014-11-30 16:25:10.113 8086 TRACE neutron.agent.l3_agent
kwargs.get('use_root_namespace', False))
2014-11-30 16:25:10.113 8086 TRACE neutron.agent.l3_agent File
"/usr/lib/python2.7/site-packages/neutron/agent/linux/ip_lib.py", line 74, in
_as_root
2014-11-30 16:25:10.113 8086 TRACE neutron.agent.l3_agent
log_fail_as_error=self.log_fail_as_error)
2014-11-30 16:25:10.113 8086 TRACE neutron.agent.l3_agent File
"/usr/lib/python2.7/site-packages/neutron/agent/linux/ip_lib.py", line 86, in
_execute
2014-11-30 16:25:10.113 8086 TRACE neutron.agent.l3_agent
log_fail_as_error=log_fail_as_error)
2014-11-30 16:25:10.113 8086 TRACE neutron.agent.l3_agent File
"/usr/lib/python2.7/site-packages/neutron/agent/linux/utils.py", line 84, in
execute
2014-11-30 16:25:10.113 8086 TRACE neutron.agent.l3_agent raise
RuntimeError(m)
2014-11-30 16:25:10.113 8086 TRACE neutron.agent.l3_agent RuntimeError:
2014-11-30 16:25:10.113 8086 TRACE neutron.agent.l3_agent Command: ['sudo',
'neutron-rootwrap', '/etc/neutron/rootwrap.conf', 'ip', 'netns', 'exec',
'qrouter-bcfe22ff-049c-4eb9-9b57-235d903ee52f', 'ip', 'route', 'replace',
'default', 'via', '37.187.128.254', 'dev', 'qg-eaa2de59-95']
2014-11-30 16:25:10.113 8086 TRACE neutron.agent.l3_agent Exit code: 2
2014-11-30 16:25:10.113 8086 TRACE neutron.agent.l3_agent Stdout: ''
2014-11-30 16:25:10.113 8086 TRACE neutron.agent.l3_agent Stderr: 'RTNETLINK
answers: Network is unreachable\n'
2014-11-30 16:25:10.113 8086 TRACE neutron.agent.l3_agent
This happens because we should set an on-link route to the gateway IP
on the external network interface first.
Once this works, we can remove the "force_gateway_on_subnet" deprecation,
to allow this not to be enforced, as it's a valid use case in many data
centers.
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