Public bug reported:
While testing out the devstack change to support IPv6,
https://review.openstack.org/#/c/87987/ I tripped-over a DVR error since
I have it enabled by default in local.conf.
I have these two things enabled in local.conf:
Q_DVR_MODE=dvr_snat
IP_VERSION=4+6
After locally fixing lib/neutron to teach it about the DVR snat-
namespace (another bug to be filed for that), stack.sh was able to
complete, but the l3-agent wasn't very happy:
Stderr: '' execute /opt/stack/neutron/neutron/agent/linux/utils.py:81
2014-09-30 12:53:47.511 21778 DEBUG neutron.agent.linux.utils [-] Running
command: ['sudo', '/usr/local/bin/neutron-rootwrap',
'/etc/neutron/rootwrap.conf', 'ip', 'netns', 'exec',
'qrouter-95b180a4-9623-4ef9-adda-772ca0838253', 'ip', 'rule', 'add', 'from',
'fd00::1/64', 'lookup', '336294682933583715844663186250927177729', 'priority',
'336294682933583715844663186250927177729'] create_process
/opt/stack/neutron/neutron/agent/linux/utils.py:46
2014-09-30 12:53:47.641 21778 ERROR neutron.agent.linux.utils [-]
Command: ['sudo', '/usr/local/bin/neutron-rootwrap',
'/etc/neutron/rootwrap.conf', 'ip', 'netns', 'exec',
'qrouter-95b180a4-9623-4ef9-adda-772ca0838253', 'arping', '-A', '-I',
'qr-3d0eda6e-54', '-c', '3', 'fd00::1']
Exit code: 2
Stdout: ''
Stderr: 'arping: unknown host fd00::1\n'
2014-09-30 12:53:47.643 21778 ERROR neutron.agent.l3_agent [-] Failed sending
gratuitous ARP:
Command: ['sudo', '/usr/local/bin/neutron-rootwrap',
'/etc/neutron/rootwrap.conf', 'ip', 'netns', 'exec',
'qrouter-95b180a4-9623-4ef9-adda-772ca0838253', 'arping', '-A', '-I',
'qr-3d0eda6e-54', '-c', '3', 'fd00::1']
Exit code: 2
Stdout: ''
Stderr: 'arping: unknown host fd00::1\n'
2014-09-30 12:53:48.682 21778 ERROR neutron.agent.linux.utils [-]
Command: ['sudo', '/usr/local/bin/neutron-rootwrap',
'/etc/neutron/rootwrap.conf', 'ip', 'netns', 'exec',
'qrouter-95b180a4-9623-4ef9-adda-772ca0838253', 'ip', 'rule', 'add', 'from',
'fd00::1/64', 'lookup', '336294682933583715844663186250927177729', 'priority',
'336294682933583715844663186250927177729']
Exit code: 255
Stdout: ''
Stderr: 'Error: argument "336294682933583715844663186250927177729" is wrong:
preference value is invalid\n\n'
2014-09-30 12:53:48.683 21778 ERROR neutron.agent.l3_agent [-] DVR: error
adding redirection logic
2014-09-30 12:53:48.683 21778 TRACE neutron.agent.l3_agent Traceback (most
recent call last):
2014-09-30 12:53:48.683 21778 TRACE neutron.agent.l3_agent File
"/opt/stack/neutron/neutron/agent/l3_agent.py", line 1443, in _snat_redirect_add
2014-09-30 12:53:48.683 21778 TRACE neutron.agent.l3_agent
ns_ipr.add_rule_from(sn_port['ip_cidr'], snat_idx, snat_idx)
2014-09-30 12:53:48.683 21778 TRACE neutron.agent.l3_agent File
"/opt/stack/neutron/neutron/agent/linux/ip_lib.py", line 202, in add_rule_from
2014-09-30 12:53:48.683 21778 TRACE neutron.agent.l3_agent ip =
self._as_root('', 'rule', tuple(args))
2014-09-30 12:53:48.683 21778 TRACE neutron.agent.l3_agent File
"/opt/stack/neutron/neutron/agent/linux/ip_lib.py", line 74, in _as_root
2014-09-30 12:53:48.683 21778 TRACE neutron.agent.l3_agent
log_fail_as_error=self.log_fail_as_error)
2014-09-30 12:53:48.683 21778 TRACE neutron.agent.l3_agent File
"/opt/stack/neutron/neutron/agent/linux/ip_lib.py", line 86, in _execute
2014-09-30 12:53:48.683 21778 TRACE neutron.agent.l3_agent
log_fail_as_error=log_fail_as_error)
2014-09-30 12:53:48.683 21778 TRACE neutron.agent.l3_agent File
"/opt/stack/neutron/neutron/agent/linux/utils.py", line 84, in execute
2014-09-30 12:53:48.683 21778 TRACE neutron.agent.l3_agent raise
RuntimeError(m)
2014-09-30 12:53:48.683 21778 TRACE neutron.agent.l3_agent RuntimeError:
2014-09-30 12:53:48.683 21778 TRACE neutron.agent.l3_agent Command: ['sudo',
'/usr/local/bin/neutron-rootwrap', '/etc/neutron/rootwrap.conf', 'ip', 'netns',
'exec', 'qrouter-95b180a4-9623-4ef9-adda-772ca0838253', 'ip', 'rule', 'add',
'from', 'fd00::1/64', 'lookup', '336294682933583715844663186250927177729',
'priority', '336294682933583715844663186250927177729']
2014-09-30 12:53:48.683 21778 TRACE neutron.agent.l3_agent Exit code: 255
2014-09-30 12:53:48.683 21778 TRACE neutron.agent.l3_agent Stdout: ''
2014-09-30 12:53:48.683 21778 TRACE neutron.agent.l3_agent Stderr: 'Error:
argument "336294682933583715844663186250927177729" is wrong: preference value
is invalid\n\n'
Ignore the ARP failures, there's already an upstream patch proposed for
that.
The fix for now might just be to ignore IPv6 addresses in the SNAT code,
we can look at optimizations later, but need to get this working so we
can enable both at the same time.
There are other errors that this then triggers, so devstack isn't very
usable until you turn one off.
** Affects: neutron
Importance: Undecided
Assignee: Brian Haley (brian-haley)
Status: New
** Changed in: neutron
Assignee: (unassigned) => Brian Haley (brian-haley)
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https://bugs.launchpad.net/bugs/1376325
Title:
Cannot enable DVR and IPv6 simultaneously
Status in OpenStack Neutron (virtual network service):
New
Bug description:
While testing out the devstack change to support IPv6,
https://review.openstack.org/#/c/87987/ I tripped-over a DVR error
since I have it enabled by default in local.conf.
I have these two things enabled in local.conf:
Q_DVR_MODE=dvr_snat
IP_VERSION=4+6
After locally fixing lib/neutron to teach it about the DVR snat-
namespace (another bug to be filed for that), stack.sh was able to
complete, but the l3-agent wasn't very happy:
Stderr: '' execute /opt/stack/neutron/neutron/agent/linux/utils.py:81
2014-09-30 12:53:47.511 21778 DEBUG neutron.agent.linux.utils [-] Running
command: ['sudo', '/usr/local/bin/neutron-rootwrap',
'/etc/neutron/rootwrap.conf', 'ip', 'netns', 'exec',
'qrouter-95b180a4-9623-4ef9-adda-772ca0838253', 'ip', 'rule', 'add', 'from',
'fd00::1/64', 'lookup', '336294682933583715844663186250927177729', 'priority',
'336294682933583715844663186250927177729'] create_process
/opt/stack/neutron/neutron/agent/linux/utils.py:46
2014-09-30 12:53:47.641 21778 ERROR neutron.agent.linux.utils [-]
Command: ['sudo', '/usr/local/bin/neutron-rootwrap',
'/etc/neutron/rootwrap.conf', 'ip', 'netns', 'exec',
'qrouter-95b180a4-9623-4ef9-adda-772ca0838253', 'arping', '-A', '-I',
'qr-3d0eda6e-54', '-c', '3', 'fd00::1']
Exit code: 2
Stdout: ''
Stderr: 'arping: unknown host fd00::1\n'
2014-09-30 12:53:47.643 21778 ERROR neutron.agent.l3_agent [-] Failed sending
gratuitous ARP:
Command: ['sudo', '/usr/local/bin/neutron-rootwrap',
'/etc/neutron/rootwrap.conf', 'ip', 'netns', 'exec',
'qrouter-95b180a4-9623-4ef9-adda-772ca0838253', 'arping', '-A', '-I',
'qr-3d0eda6e-54', '-c', '3', 'fd00::1']
Exit code: 2
Stdout: ''
Stderr: 'arping: unknown host fd00::1\n'
2014-09-30 12:53:48.682 21778 ERROR neutron.agent.linux.utils [-]
Command: ['sudo', '/usr/local/bin/neutron-rootwrap',
'/etc/neutron/rootwrap.conf', 'ip', 'netns', 'exec',
'qrouter-95b180a4-9623-4ef9-adda-772ca0838253', 'ip', 'rule', 'add', 'from',
'fd00::1/64', 'lookup', '336294682933583715844663186250927177729', 'priority',
'336294682933583715844663186250927177729']
Exit code: 255
Stdout: ''
Stderr: 'Error: argument "336294682933583715844663186250927177729" is wrong:
preference value is invalid\n\n'
2014-09-30 12:53:48.683 21778 ERROR neutron.agent.l3_agent [-] DVR: error
adding redirection logic
2014-09-30 12:53:48.683 21778 TRACE neutron.agent.l3_agent Traceback (most
recent call last):
2014-09-30 12:53:48.683 21778 TRACE neutron.agent.l3_agent File
"/opt/stack/neutron/neutron/agent/l3_agent.py", line 1443, in _snat_redirect_add
2014-09-30 12:53:48.683 21778 TRACE neutron.agent.l3_agent
ns_ipr.add_rule_from(sn_port['ip_cidr'], snat_idx, snat_idx)
2014-09-30 12:53:48.683 21778 TRACE neutron.agent.l3_agent File
"/opt/stack/neutron/neutron/agent/linux/ip_lib.py", line 202, in add_rule_from
2014-09-30 12:53:48.683 21778 TRACE neutron.agent.l3_agent ip =
self._as_root('', 'rule', tuple(args))
2014-09-30 12:53:48.683 21778 TRACE neutron.agent.l3_agent File
"/opt/stack/neutron/neutron/agent/linux/ip_lib.py", line 74, in _as_root
2014-09-30 12:53:48.683 21778 TRACE neutron.agent.l3_agent
log_fail_as_error=self.log_fail_as_error)
2014-09-30 12:53:48.683 21778 TRACE neutron.agent.l3_agent File
"/opt/stack/neutron/neutron/agent/linux/ip_lib.py", line 86, in _execute
2014-09-30 12:53:48.683 21778 TRACE neutron.agent.l3_agent
log_fail_as_error=log_fail_as_error)
2014-09-30 12:53:48.683 21778 TRACE neutron.agent.l3_agent File
"/opt/stack/neutron/neutron/agent/linux/utils.py", line 84, in execute
2014-09-30 12:53:48.683 21778 TRACE neutron.agent.l3_agent raise
RuntimeError(m)
2014-09-30 12:53:48.683 21778 TRACE neutron.agent.l3_agent RuntimeError:
2014-09-30 12:53:48.683 21778 TRACE neutron.agent.l3_agent Command: ['sudo',
'/usr/local/bin/neutron-rootwrap', '/etc/neutron/rootwrap.conf', 'ip', 'netns',
'exec', 'qrouter-95b180a4-9623-4ef9-adda-772ca0838253', 'ip', 'rule', 'add',
'from', 'fd00::1/64', 'lookup', '336294682933583715844663186250927177729',
'priority', '336294682933583715844663186250927177729']
2014-09-30 12:53:48.683 21778 TRACE neutron.agent.l3_agent Exit code: 255
2014-09-30 12:53:48.683 21778 TRACE neutron.agent.l3_agent Stdout: ''
2014-09-30 12:53:48.683 21778 TRACE neutron.agent.l3_agent Stderr: 'Error:
argument "336294682933583715844663186250927177729" is wrong: preference value
is invalid\n\n'
Ignore the ARP failures, there's already an upstream patch proposed
for that.
The fix for now might just be to ignore IPv6 addresses in the SNAT
code, we can look at optimizations later, but need to get this working
so we can enable both at the same time.
There are other errors that this then triggers, so devstack isn't very
usable until you turn one off.
To manage notifications about this bug go to:
https://bugs.launchpad.net/neutron/+bug/1376325/+subscriptions
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