** Changed in: neutron
Status: In Progress => Won't Fix
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https://bugs.launchpad.net/bugs/1528868
Title:
Neutron-metering-agent failed to get traffic counters when xtables is
locked
Status in neutron:
Won't Fix
Bug description:
In some cases, if we try to show iptables on router namespace manualy,
where exist some rules created by meter-agent, we can see the
following traces in meter-agent logs:
2015-12-17 08:49:14.709 ERROR neutron.agent.linux.utils [-] Exit code:
4; Stdin: ; Stdout: ; Stderr: Another app is currently holding the
xtables lock. Perhaps you want to use the -w option?
2015-12-17 08:49:14.710 ERROR
neutron.services.metering.drivers.iptables.iptables_driver [-] Failed to get
traffic counters, router: {u'status': u'ACTIVE', u'name': u'router1',
u'gw_port_id': u'00e8ce89-0ebe-4e8a-b1ca-c2993210a8db', u'admin_state_up':
True, u'tenant_id': u'f8267bb3db654ca2a26a07d9757ec280', u'_metering_labels':
[{u'rules': [{u'remote_ip_prefix': u'0.0.0.0/0', u'direction': u'egress',
u'metering_label_id': u'ef4f1dab-cafe-4058-aa6a-85a79a10c67e', u'id':
u'986d6cfe-719b-43a7-96d1-79e97eb93567', u'excluded': False}], u'id':
u'ef4f1dab-cafe-4058-aa6a-85a79a10c67e'}], u'id':
u'8aef2cba-45b1-42f3-b7a4-8ea992d6cded'}
2015-12-17 08:49:14.710 TRACE
neutron.services.metering.drivers.iptables.iptables_driver Traceback (most
recent call last):
2015-12-17 08:49:14.710 TRACE
neutron.services.metering.drivers.iptables.iptables_driver File
"/opt/stack/neutron/neutron/services/metering/drivers/iptables/iptables_driver.py",
line 354, in get_traffic_counters
2015-12-17 08:49:14.710 TRACE
neutron.services.metering.drivers.iptables.iptables_driver chain,
wrap=False, zero=True)
2015-12-17 08:49:14.710 TRACE
neutron.services.metering.drivers.iptables.iptables_driver File
"/opt/stack/neutron/neutron/agent/linux/iptables_manager.py", line 661, in
get_traffic_counters
2015-12-17 08:49:14.710 TRACE
neutron.services.metering.drivers.iptables.iptables_driver current_table =
self.execute(args, run_as_root=True)
2015-12-17 08:49:14.710 TRACE
neutron.services.metering.drivers.iptables.iptables_driver File
"/opt/stack/neutron/neutron/agent/linux/utils.py", line 140, in execute
2015-12-17 08:49:14.710 TRACE
neutron.services.metering.drivers.iptables.iptables_driver raise
RuntimeError(msg)
2015-12-17 08:49:14.710 TRACE
neutron.services.metering.drivers.iptables.iptables_driver RuntimeError: Exit
code: 4; Stdin: ; Stdout: ; Stderr: Another app is currently holding the
xtables lock. Perhaps you want to use the -w option?
2015-12-17 08:49:14.710 TRACE
neutron.services.metering.drivers.iptables.iptables_driver
2015-12-17 08:49:14.710 TRACE
neutron.services.metering.drivers.iptables.iptables_driver
Steps to reproduce:
1. Create neutron-meter-label
2. Find router's namespace, where rules added by meter-agent
3. run:
sudo watch -n 1 ip net e %namespace-name% iptables -L -v -x -n
4. See logs of meter-agent
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