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[Bug 1598217] [NEW] [stable/liberty] LBaaS v2 haproxy: lbaas namespaces are not deleted after cleanup

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Prashant Shetty <prashantshetty@xxxxxxxxxx>
Date: Fri, 01 Jul 2016 15:41:40 -0000
Reply-to: Bug 1598217 <1598217@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
Public bug reported:

After below steps, I see config got cleaned and left q-lbaas namespace
on the controller.

Steps:
Create LBaaS loadbalancer for subnet
Create listener
Create pool and add instances as members
Delete pool
Delete listener
Delete LB

stack@controller:/opt/stack/logs$ sudo ip netns exec qlbaas-e61a1fbf-a897-41e4-bf05-459c0c2459a2 ifconfig
lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:26 errors:0 dropped:0 overruns:0 frame:0
          TX packets:26 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:2368 (2.3 KB)  TX bytes:2368 (2.3 KB)

stack@controller:/opt/stack/logs$ 
2016-06-30 05:03:04.831 DEBUG oslo_concurrency.lockutils [req-cfeb0e31-759d-468c-9542-9bf7cb3e690d admin ce1d087209c64df4b7e8007dc35def22] Lock "haproxy-driver" acquired by "neutron_lbaas.drivers.haproxy.namespace_driver.deploy_instance" :: waited 0.000s from (pid=8672) inner /usr/local/lib/python2.7/dist-packages/oslo_concurrency/lockutils.py:253
2016-06-30 05:03:04.831 DEBUG neutron.agent.linux.utils [req-cfeb0e31-759d-468c-9542-9bf7cb3e690d admin ce1d087209c64df4b7e8007dc35def22] Running command (rootwrap daemon): ['ip', '-o', 'netns', 'list'] from (pid=8672) execute_rootwrap_daemon /opt/stack/neutron/neutron/agent/linux/utils.py:101
2016-06-30 05:03:04.835 DEBUG neutron.agent.linux.utils [req-cfeb0e31-759d-468c-9542-9bf7cb3e690d admin ce1d087209c64df4b7e8007dc35def22] 
Command: ['ip', '-o', 'netns', 'list']
Exit code: 0
 from (pid=8672) execute /opt/stack/neutron/neutron/agent/linux/utils.py:156
2016-06-30 05:03:04.837 DEBUG neutron.agent.linux.utils [req-cfeb0e31-759d-468c-9542-9bf7cb3e690d admin ce1d087209c64df4b7e8007dc35def22] Running command (rootwrap daemon): ['ip', 'netns', 'exec', 'qlbaas-e61a1fbf-a897-41e4-bf05-459c0c2459a2', 'haproxy', '-f', '/opt/stack/data/neutron/lbaas/v2/e61a1fbf-a897-41e4-bf05-459c0c2459a2/haproxy.conf', '-p', '/opt/stack/data/neutron/lbaas/v2/e61a1fbf-a897-41e4-bf05-459c0c2459a2/haproxy.pid', '-sf', '3794'] from (pid=8672) execute_rootwrap_daemon /opt/stack/neutron/neutron/agent/linux/utils.py:101
2016-06-30 05:03:04.867 DEBUG neutron.agent.linux.utils [req-cfeb0e31-759d-468c-9542-9bf7cb3e690d admin ce1d087209c64df4b7e8007dc35def22] 
Command: ['ip', 'netns', 'exec', u'qlbaas-e61a1fbf-a897-41e4-bf05-459c0c2459a2', 'haproxy', '-f', u'/opt/stack/data/neutron/lbaas/v2/e61a1fbf-a897-41e4-bf05-459c0c2459a2/haproxy.conf', '-p', u'/opt/stack/data/neutron/lbaas/v2/e61a1fbf-a897-41e4-bf05-459c0c2459a2/haproxy.pid', '-sf', '3794']
Exit code: 0

** Affects: neutron
     Importance: Undecided
         Status: New


** Tags: lbaas

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Title:
  [stable/liberty] LBaaS v2 haproxy: lbaas namespaces are not deleted
  after cleanup

Status in neutron:
  New

Bug description:
  After below steps, I see config got cleaned and left q-lbaas namespace
  on the controller.

  Steps:
  Create LBaaS loadbalancer for subnet
  Create listener
  Create pool and add instances as members
  Delete pool
  Delete listener
  Delete LB

  stack@controller:/opt/stack/logs$ sudo ip netns exec qlbaas-e61a1fbf-a897-41e4-bf05-459c0c2459a2 ifconfig
  lo        Link encap:Local Loopback  
            inet addr:127.0.0.1  Mask:255.0.0.0
            inet6 addr: ::1/128 Scope:Host
            UP LOOPBACK RUNNING  MTU:65536  Metric:1
            RX packets:26 errors:0 dropped:0 overruns:0 frame:0
            TX packets:26 errors:0 dropped:0 overruns:0 carrier:0
            collisions:0 txqueuelen:0 
            RX bytes:2368 (2.3 KB)  TX bytes:2368 (2.3 KB)

  stack@controller:/opt/stack/logs$ 
  2016-06-30 05:03:04.831 DEBUG oslo_concurrency.lockutils [req-cfeb0e31-759d-468c-9542-9bf7cb3e690d admin ce1d087209c64df4b7e8007dc35def22] Lock "haproxy-driver" acquired by "neutron_lbaas.drivers.haproxy.namespace_driver.deploy_instance" :: waited 0.000s from (pid=8672) inner /usr/local/lib/python2.7/dist-packages/oslo_concurrency/lockutils.py:253
  2016-06-30 05:03:04.831 DEBUG neutron.agent.linux.utils [req-cfeb0e31-759d-468c-9542-9bf7cb3e690d admin ce1d087209c64df4b7e8007dc35def22] Running command (rootwrap daemon): ['ip', '-o', 'netns', 'list'] from (pid=8672) execute_rootwrap_daemon /opt/stack/neutron/neutron/agent/linux/utils.py:101
  2016-06-30 05:03:04.835 DEBUG neutron.agent.linux.utils [req-cfeb0e31-759d-468c-9542-9bf7cb3e690d admin ce1d087209c64df4b7e8007dc35def22] 
  Command: ['ip', '-o', 'netns', 'list']
  Exit code: 0
   from (pid=8672) execute /opt/stack/neutron/neutron/agent/linux/utils.py:156
  2016-06-30 05:03:04.837 DEBUG neutron.agent.linux.utils [req-cfeb0e31-759d-468c-9542-9bf7cb3e690d admin ce1d087209c64df4b7e8007dc35def22] Running command (rootwrap daemon): ['ip', 'netns', 'exec', 'qlbaas-e61a1fbf-a897-41e4-bf05-459c0c2459a2', 'haproxy', '-f', '/opt/stack/data/neutron/lbaas/v2/e61a1fbf-a897-41e4-bf05-459c0c2459a2/haproxy.conf', '-p', '/opt/stack/data/neutron/lbaas/v2/e61a1fbf-a897-41e4-bf05-459c0c2459a2/haproxy.pid', '-sf', '3794'] from (pid=8672) execute_rootwrap_daemon /opt/stack/neutron/neutron/agent/linux/utils.py:101
  2016-06-30 05:03:04.867 DEBUG neutron.agent.linux.utils [req-cfeb0e31-759d-468c-9542-9bf7cb3e690d admin ce1d087209c64df4b7e8007dc35def22] 
  Command: ['ip', 'netns', 'exec', u'qlbaas-e61a1fbf-a897-41e4-bf05-459c0c2459a2', 'haproxy', '-f', u'/opt/stack/data/neutron/lbaas/v2/e61a1fbf-a897-41e4-bf05-459c0c2459a2/haproxy.conf', '-p', u'/opt/stack/data/neutron/lbaas/v2/e61a1fbf-a897-41e4-bf05-459c0c2459a2/haproxy.pid', '-sf', '3794']
  Exit code: 0

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