1534458 – Cloud-init fails in our cluster with KeyError: 'dns_search' and doesn't assign an IP to instance

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Bug 1534458 - Cloud-init fails in our cluster with KeyError: 'dns_search' and doesn't assign an IP to instance

Summary: Cloud-init fails in our cluster with KeyError: 'dns_search' and doesn't assig...

Keywords:
Status:	CLOSED DUPLICATE of bug 1489270
Alias:	None
Product:	Red Hat Enterprise Linux 7
Classification:	Red Hat
Component:	cloud-init
Sub Component:
Version:	7.4
Hardware:	Unspecified
OS:	Unspecified
Priority:	unspecified
Severity:	unspecified
Target Milestone:	rc
Target Release:	---
Assignee:	Ryan McCabe
QA Contact:	Vratislav Hutsky
Docs Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+	depends on / blocked

Reported:	2018-01-15 10:02 UTC by cristi falcas
Modified:	2018-01-15 14:50 UTC (History)
CC List:	5 users (show)
Fixed In Version:
Doc Type:	If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed:	2018-01-15 14:37:24 UTC
Target Upstream Version:
Embargoed:

Attachments	(Terms of Use)

Description cristi falcas 2018-01-15 10:02:15 UTC

Description of problem:
Cloud-init fails in our cluster with KeyError: 'dns_search' and doesn't assign an IP to instance


Version-Release number of selected component (if applicable):
cloud-init-0.7.9-20.el7.x86_64
openstack-glance-2014.2.3-1.el7.noarch
openstack-keystone-2014.2.2-1.el7.noarch
openstack-nova-console-2014.2.2-1.el7.noarch
openstack-neutron-ml2-2014.2.3-1.el7.noarch
openstack-cinder-2014.2.3-3.el7.noarch
openstack-nova-objectstore-2014.2.2-1.el7.noarch
openstack-neutron-vpn-agent-2014.2.3-1.el7.noarch
openstack-nova-api-2014.2.2-1.el7.noarch
openstack-dashboard-2014.2.2-1.el7.noarch
openstack-neutron-metering-agent-2014.2.3-1.el7.noarch
openstack-nova-scheduler-2014.2.2-1.el7.noarch
openstack-nova-compute-2014.2.2-1.el7.noarch
openstack-nova-common-2014.2.2-1.el7.noarch
openstack-nova-novncproxy-2014.2.2-1.el7.noarch
openstack-utils-2014.2-1.el7.centos.noarch
openstack-nova-conductor-2014.2.2-1.el7.noarch
openstack-neutron-openvswitch-2014.2.3-1.el7.noarch
openstack-neutron-2014.2.3-1.el7.noarch
openstack-nova-cert-2014.2.2-1.el7.noarch


How reproducible:
Always

Steps to Reproduce:
1. boot a new machine
2. wait to finish boot
3. try to login

Actual results:
During boot, this exception is thrown:
2018-01-15 11:44:01,750 - util.py[WARNING]: failed stage init-local
failed run of stage init-local
------------------------------------------------------------
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/cloudinit/cmd/main.py", line 513, in status_wrapper
    ret = functor(name, args)
  File "/usr/lib/python2.7/site-packages/cloudinit/cmd/main.py", line 269, in main_init
    init.apply_network_config(bring_up=bool(mode != sources.DSMODE_LOCAL))
  File "/usr/lib/python2.7/site-packages/cloudinit/stages.py", line 642, in apply_network_config
    return self.distro.apply_network_config(netcfg, bring_up=bring_up)
  File "/usr/lib/python2.7/site-packages/cloudinit/distros/__init__.py", line 150, in apply_network_config
    dev_names = self._write_network_config(netconfig)
  File "/usr/lib/python2.7/site-packages/cloudinit/distros/rhel.py", line 60, in _write_network_config
    self._net_renderer.render_network_state("/", ns)
  File "/usr/lib/python2.7/site-packages/cloudinit/net/sysconfig.py", line 556, in render_network_state
    network_state).items():
  File "/usr/lib/python2.7/site-packages/cloudinit/net/sysconfig.py", line 535, in _render_sysconfig
    cls._render_physical_interfaces(network_state, iface_contents)
  File "/usr/lib/python2.7/site-packages/cloudinit/net/sysconfig.py", line 447, in _render_physical_interfaces
    cls._render_subnets(iface_cfg, iface_subnets)
  File "/usr/lib/python2.7/site-packages/cloudinit/net/sysconfig.py", line 368, in _render_subnets
    if isinstance(subnet['dns_search'], (list, tuple)):
KeyError: 'dns_search'
------------------------------------------------------------


Expected results:
Instance should have an IP assigned

Additional info:
I now that our openstack instance is very old, but the fix is really simple:
in /usr/lib/python2.7/site-packages/cloudinit/net/sysconfig.py, line 368, just check if the key exists first:

if 'dns_search' in subnet and isinstance(subnet['dns_search'], (list, tuple)):

Comment 2 Ryan McCabe 2018-01-15 14:37:24 UTC

Thanks for catching this. This looks like a typo introduced as part of the fix for Bug 1489270, so I am going to dupe it into that.

*** This bug has been marked as a duplicate of bug 1489270 ***

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