** Also affects: nova/queens
Importance: Undecided
Status: New
** Changed in: nova
Status: New => Won't Fix
** Changed in: nova/queens
Status: New => In Progress
** Changed in: nova/queens
Assignee: (unassigned) => Aditya Vaja (wolverine-av)
** Changed in: nova/queens
Importance: Undecided => High
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https://bugs.launchpad.net/bugs/1794126
Title:
typo in IVS related privsep method, VM creation failure
Status in OpenStack Compute (nova):
Won't Fix
Status in OpenStack Compute (nova) queens series:
In Progress
Bug description:
Description
===========
As part of the change here [1], a few calls to edit files as root were moved
to a privsep class that encompasses all those edits.
A typo creeped in, causing a failure when creating a VM with VIF type IVS.
Method in question:
@nova.privsep.dacnet_admin_pctxt.entrypoint
def disable_ipv6(interface):
"""Disable ipv6 for a bridge."""
with open('/proc/sys/net/ipv6/conf/%s/disable_ipv' % interface, 'w') as f:
f.write('1')
The name of the file should be 'disable_ipv6' instead of 'disable_ipv'.
Missing '6' at the end.
Logs & Configs
==============
log excerpt for failure:
2018-09-24 14:21:47.167 1 ERROR nova.compute.manager
[req-e2560c77-8950-4dc6-8f4f-44254b184bbb 17bbd148d3f34a42bede6bdb8fcc84aa
62daca4c6dff406685f3fcf754cb82c4 - default default] [instance:
a631eff3-9d68-4e06-a7ce-4338e29e8e2d] Instance failed to spawn: IOError: [Errno
2] No such file or directory
2018-09-24 14:21:47.167 1 ERROR nova.compute.manager [instance:
a631eff3-9d68-4e06-a7ce-4338e29e8e2d] Traceback (most recent call last):
2018-09-24 14:21:47.167 1 ERROR nova.compute.manager [instance:
a631eff3-9d68-4e06-a7ce-4338e29e8e2d] File
"/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 2236, in
_build_resources
2018-09-24 14:21:47.167 1 ERROR nova.compute.manager [instance:
a631eff3-9d68-4e06-a7ce-4338e29e8e2d] yield resources
2018-09-24 14:21:47.167 1 ERROR nova.compute.manager [instance:
a631eff3-9d68-4e06-a7ce-4338e29e8e2d] File
"/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 2016, in
_build_and_run_instance
2018-09-24 14:21:47.167 1 ERROR nova.compute.manager [instance:
a631eff3-9d68-4e06-a7ce-4338e29e8e2d] block_device_info=block_device_info)
2018-09-24 14:21:47.167 1 ERROR nova.compute.manager [instance:
a631eff3-9d68-4e06-a7ce-4338e29e8e2d] File
"/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 3100, in
spawn
2018-09-24 14:21:47.167 1 ERROR nova.compute.manager [instance:
a631eff3-9d68-4e06-a7ce-4338e29e8e2d] destroy_disks_on_failure=True)
2018-09-24 14:21:47.167 1 ERROR nova.compute.manager [instance:
a631eff3-9d68-4e06-a7ce-4338e29e8e2d] File
"/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 5590, in
_create_domain_and_network
2018-09-24 14:21:47.167 1 ERROR nova.compute.manager [instance:
a631eff3-9d68-4e06-a7ce-4338e29e8e2d] destroy_disks_on_failure)
2018-09-24 14:21:47.167 1 ERROR nova.compute.manager [instance:
a631eff3-9d68-4e06-a7ce-4338e29e8e2d] File
"/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__
2018-09-24 14:21:47.167 1 ERROR nova.compute.manager [instance:
a631eff3-9d68-4e06-a7ce-4338e29e8e2d] self.force_reraise()
2018-09-24 14:21:47.167 1 ERROR nova.compute.manager [instance:
a631eff3-9d68-4e06-a7ce-4338e29e8e2d] File
"/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in
force_reraise
2018-09-24 14:21:47.167 1 ERROR nova.compute.manager [instance:
a631eff3-9d68-4e06-a7ce-4338e29e8e2d] six.reraise(self.type_, self.value,
self.tb)
2018-09-24 14:21:47.167 1 ERROR nova.compute.manager [instance:
a631eff3-9d68-4e06-a7ce-4338e29e8e2d] File
"/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 5549, in
_create_domain_and_network
2018-09-24 14:21:47.167 1 ERROR nova.compute.manager [instance:
a631eff3-9d68-4e06-a7ce-4338e29e8e2d] self.plug_vifs(instance, network_info)
2018-09-24 14:21:47.167 1 ERROR nova.compute.manager [instance:
a631eff3-9d68-4e06-a7ce-4338e29e8e2d] File
"/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 829, in
plug_vifs
2018-09-24 14:21:47.167 1 ERROR nova.compute.manager [instance:
a631eff3-9d68-4e06-a7ce-4338e29e8e2d] self.vif_driver.plug(instance, vif)
2018-09-24 14:21:47.167 1 ERROR nova.compute.manager [instance:
a631eff3-9d68-4e06-a7ce-4338e29e8e2d] File
"/usr/lib/python2.7/site-packages/nova/virt/libvirt/vif.py", line 896, in plug
2018-09-24 14:21:47.167 1 ERROR nova.compute.manager [instance:
a631eff3-9d68-4e06-a7ce-4338e29e8e2d] func(instance, vif)
2018-09-24 14:21:47.167 1 ERROR nova.compute.manager [instance:
a631eff3-9d68-4e06-a7ce-4338e29e8e2d] File
"/usr/lib/python2.7/site-packages/nova/virt/libvirt/vif.py", line 722, in
plug_ivs
2018-09-24 14:21:47.167 1 ERROR nova.compute.manager [instance:
a631eff3-9d68-4e06-a7ce-4338e29e8e2d] self.plug_ivs_hybrid(instance, vif)
2018-09-24 14:21:47.167 1 ERROR nova.compute.manager [instance:
a631eff3-9d68-4e06-a7ce-4338e29e8e2d] File
"/usr/lib/python2.7/site-packages/nova/virt/libvirt/vif.py", line 703, in
plug_ivs_hybrid
2018-09-24 14:21:47.167 1 ERROR nova.compute.manager [instance:
a631eff3-9d68-4e06-a7ce-4338e29e8e2d]
nova.privsep.libvirt.disable_ipv6(br_name)
2018-09-24 14:21:47.167 1 ERROR nova.compute.manager [instance:
a631eff3-9d68-4e06-a7ce-4338e29e8e2d] File
"/usr/lib/python2.7/site-packages/oslo_privsep/priv_context.py", line 207, in
_wrap
2018-09-24 14:21:47.167 1 ERROR nova.compute.manager [instance:
a631eff3-9d68-4e06-a7ce-4338e29e8e2d] return self.channel.remote_call(name,
args, kwargs)
2018-09-24 14:21:47.167 1 ERROR nova.compute.manager [instance:
a631eff3-9d68-4e06-a7ce-4338e29e8e2d] File
"/usr/lib/python2.7/site-packages/oslo_privsep/daemon.py", line 202, in
remote_call
2018-09-24 14:21:47.167 1 ERROR nova.compute.manager [instance:
a631eff3-9d68-4e06-a7ce-4338e29e8e2d] raise exc_type(*result[2])
2018-09-24 14:21:47.167 1 ERROR nova.compute.manager [instance:
a631eff3-9d68-4e06-a7ce-4338e29e8e2d] IOError: [Errno 2] No such file or
directory
2018-09-24 14:21:47.167 1 ERROR nova.compute.manager [instance:
a631eff3-9d68-4e06-a7ce-4338e29e8e2d]
I'll open a fix PR as well. And add a check that file exists before
editing - apparently that's not true for this particular case and
wasn't carried over from existing code.
Note: only affects stable/queens branch. Later releases has proper
calling to os-vif-bigswitch and this code has been cleaned up from
Nova.
[1] https://review.openstack.org/#/c/489438/
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