** Changed in: neutron
Status: New => Invalid
--
You received this bug notification because you are a member of Yahoo!
Engineering Team, which is subscribed to neutron.
https://bugs.launchpad.net/bugs/1795280
Title:
netns deletion on newer kernels fails with errno 16
Status in neutron:
Invalid
Bug description:
This is probably not neutron related, but need help with some input.
On a 3.10 kernel on CentOS 7.5 by simply creating a network and
deleting it properly terminates all processes, removes interfaces and
deletes the network namespace.
[root@controller ~]# uname -r
3.10.0-862.11.6.el7.x86_64
If running a later kernel like 4.18 there is some change that causes
the namespace deletion to cause a OSError errno 16 device or resource
busy.
Before something like kernel 3.19 the netns filesystem was provided in proc
but has since been moved
to it's own nsfs, maybe this has something to do with it, but I haven't seen
this issue on Ubuntu before.
[root@controller ~]# mount | grep qdhcp
proc on /run/netns/qdhcp-51e47959-9a2b-4372-a204-aff75de9bd01 type proc
(rw,nosuid,nodev,noexec,relatime)
proc on /run/netns/qdhcp-51e47959-9a2b-4372-a204-aff75de9bd01 type proc
(rw,nosuid,nodev,noexec,relatime)
[root@controller ~]# uname -r
4.18.8-1.el7.elrepo.x86_64
nsfs on /run/netns/qdhcp-1fb24615-fd9e-4804-aade-5668bb2cdecb type nsfs
(rw,seclabel)
nsfs on /run/netns/qdhcp-1fb24615-fd9e-4804-aade-5668bb2cdecb type nsfs
(rw,seclabel)
Perhaps some CentOS or RedHat person can shime in about this.
Can reproduce this every single time:
* Create network, it spawns dnsmasq, haproxy and the interfaces in a netns
* Delete network, it will terminate all processes, delete interface but netns
cannot be deleted and throws below error
Seen on both queens and rocky fwiw
2018-10-01 00:03:27.662 2093 ERROR neutron.agent.dhcp.agent
[req-28a9e37f-a2ca-4375-a3f0-8384711414dd - - - - -] Unable to disable dhcp for
1fb24615-fd9e-4804-aade-5668bb2cdecb.: OSError: [Errno 16] Device or resource
busy
2018-10-01 00:03:27.662 2093 ERROR neutron.agent.dhcp.agent Traceback (most
recent call last):
2018-10-01 00:03:27.662 2093 ERROR neutron.agent.dhcp.agent File
"/usr/lib/python2.7/site-packages/neutron/agent/dhcp/agent.py", line 144, in
call_driver
2018-10-01 00:03:27.662 2093 ERROR neutron.agent.dhcp.agent
getattr(driver, action)(**action_kwargs)
2018-10-01 00:03:27.662 2093 ERROR neutron.agent.dhcp.agent File
"/usr/lib/python2.7/site-packages/neutron/agent/linux/dhcp.py", line 241, in
disable
2018-10-01 00:03:27.662 2093 ERROR neutron.agent.dhcp.agent
self._destroy_namespace_and_port()
2018-10-01 00:03:27.662 2093 ERROR neutron.agent.dhcp.agent File
"/usr/lib/python2.7/site-packages/neutron/agent/linux/dhcp.py", line 255, in
_destroy_namespace_and_port
2018-10-01 00:03:27.662 2093 ERROR neutron.agent.dhcp.agent
ip_lib.delete_network_namespace(self.network.namespace)
2018-10-01 00:03:27.662 2093 ERROR neutron.agent.dhcp.agent File
"/usr/lib/python2.7/site-packages/neutron/agent/linux/ip_lib.py", line 1105, in
delete_network_namespace
2018-10-01 00:03:27.662 2093 ERROR neutron.agent.dhcp.agent
privileged.remove_netns(namespace, **kwargs)
2018-10-01 00:03:27.662 2093 ERROR neutron.agent.dhcp.agent File
"/usr/lib/python2.7/site-packages/oslo_privsep/priv_context.py", line 207, in
_wrap
2018-10-01 00:03:27.662 2093 ERROR neutron.agent.dhcp.agent return
self.channel.remote_call(name, args, kwargs)
2018-10-01 00:03:27.662 2093 ERROR neutron.agent.dhcp.agent File
"/usr/lib/python2.7/site-packages/oslo_privsep/daemon.py", line 202, in
remote_call
2018-10-01 00:03:27.662 2093 ERROR neutron.agent.dhcp.agent raise
exc_type(*result[2])
2018-10-01 00:03:27.662 2093 ERROR neutron.agent.dhcp.agent OSError: [Errno
16] Device or resource busy
To manage notifications about this bug go to:
https://bugs.launchpad.net/neutron/+bug/1795280/+subscriptions
--
Mailing list: https://launchpad.net/~yahoo-eng-team
Post to : [email protected]
Unsubscribe : https://launchpad.net/~yahoo-eng-team
More help : https://help.launchpad.net/ListHelp
