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[Roopak Parikh <rparikh@xxxxxxxxxxxxx>]

Public bug reported:


I have a VirtualMachine image (Scientific Linux 6.4) which has a static IP address assigned to it. Using Openstack and using 'config-drive' we tried to boot a new VirtualMachine from that image, config-drive, the ISO contains a new 'static-ip' address. Cloud-init recognizes that and tries to read the existing /etc/sysconfig/network-scripts/ifcfg-eth0 and fails with the following error:

---

Apr 24 18:04:13 rparikh-sl6-w-cloud-init [CLOUDINIT] util.py[DEBUG]:
Getting data from <class
'cloudinit.sources.DataSourceConfigDrive.DataSourceConfigDrive'>
failed#012Traceback (most recent call last):#012  File
"/usr/lib/python2.6/site-packages/cloudinit/sources/__init__.py", line
243, in find_source#012    if s.get_data():#012  File
"/usr/lib/python2.6/site-
packages/cloudinit/sources/DataSourceConfigDrive.py", line 212, in
get_data#012    self.helper.on_first_boot(results)#012  File
"/usr/lib/python2.6/site-
packages/cloudinit/sources/DataSourceConfigDrive.py", line 54, in
on_first_boot#012
self.distro.apply_network(data['network_config'])#012  File
"/usr/lib/python2.6/site-packages/cloudinit/distros/__init__.py", line
116, in apply_network#012    dev_names =
self._write_network(settings)#012  File "/usr/lib/python2.6/site-
packages/cloudinit/distros/rhel.py", line 85, in _write_network#012
rhel_util.update_sysconfig_file(net_fn, net_cfg)#012  File
"/usr/lib/python2.6/site-packages/cloudinit/distros/rhel_util.py", line
125, in update_sysconfig_file#012    (exists, contents) =
read_sysconfig_file(fn)#012  File "/usr/lib/python2.6/site-
packages/cloudinit/distros/rhel_util.py", line 153, in
read_sysconfig_file#012    return (exists, SysConf(contents))#012  File
"/usr/lib/python2.6/site-
packages/cloudinit/distros/parsers/sys_conf.py", line 60, in
__init__#012    write_empty_values=True)#012  File "/usr/lib/python2.6
/site-packages/configobj.py", line 1219, in __init__#012
self._load(infile, configspec)#012  File "/usr/lib/python2.6/site-
packages/configobj.py", line 1302, in _load#012    raise
error#012DuplicateError: Duplicate keyword name at line 24.

-----

The problem seems to be duplicate keys in the ifcfg-eth0, we can try and
fix this image, but there are probably others with the same settings and
in general I would assume parsing should be resilient to these failures.
In addition I am not sure if I understand the logic behind reading the
current ifcfg and modifying it, we should be able to simplify it by
overwriting (a backup can be taken for debugging purposes) the ifcfg
file.

Attached is a screenshot with contents of the ifcfg file.

** Affects: cloud-init
     Importance: Undecided
         Status: New

** Attachment added: "Screenshot for the ifcfg-ethX file"
   https://bugs.launchpad.net/bugs/1448594/+attachment/4384372/+files/Screen%20Shot%202015-04-25%20at%2010.21.41%20PM.png

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https://bugs.launchpad.net/bugs/1448594

Title:
  DuplicateError while parsing ifcfg-ethX

Status in Init scripts for use on cloud images:
  New

Bug description:
  
  I have a VirtualMachine image (Scientific Linux 6.4) which has a static IP address assigned to it. Using Openstack and using 'config-drive' we tried to boot a new VirtualMachine from that image, config-drive, the ISO contains a new 'static-ip' address. Cloud-init recognizes that and tries to read the existing /etc/sysconfig/network-scripts/ifcfg-eth0 and fails with the following error:

  ---

  Apr 24 18:04:13 rparikh-sl6-w-cloud-init [CLOUDINIT] util.py[DEBUG]:
  Getting data from <class
  'cloudinit.sources.DataSourceConfigDrive.DataSourceConfigDrive'>
  failed#012Traceback (most recent call last):#012  File
  "/usr/lib/python2.6/site-packages/cloudinit/sources/__init__.py", line
  243, in find_source#012    if s.get_data():#012  File
  "/usr/lib/python2.6/site-
  packages/cloudinit/sources/DataSourceConfigDrive.py", line 212, in
  get_data#012    self.helper.on_first_boot(results)#012  File
  "/usr/lib/python2.6/site-
  packages/cloudinit/sources/DataSourceConfigDrive.py", line 54, in
  on_first_boot#012
  self.distro.apply_network(data['network_config'])#012  File
  "/usr/lib/python2.6/site-packages/cloudinit/distros/__init__.py", line
  116, in apply_network#012    dev_names =
  self._write_network(settings)#012  File "/usr/lib/python2.6/site-
  packages/cloudinit/distros/rhel.py", line 85, in _write_network#012
  rhel_util.update_sysconfig_file(net_fn, net_cfg)#012  File
  "/usr/lib/python2.6/site-packages/cloudinit/distros/rhel_util.py",
  line 125, in update_sysconfig_file#012    (exists, contents) =
  read_sysconfig_file(fn)#012  File "/usr/lib/python2.6/site-
  packages/cloudinit/distros/rhel_util.py", line 153, in
  read_sysconfig_file#012    return (exists, SysConf(contents))#012
  File "/usr/lib/python2.6/site-
  packages/cloudinit/distros/parsers/sys_conf.py", line 60, in
  __init__#012    write_empty_values=True)#012  File "/usr/lib/python2.6
  /site-packages/configobj.py", line 1219, in __init__#012
  self._load(infile, configspec)#012  File "/usr/lib/python2.6/site-
  packages/configobj.py", line 1302, in _load#012    raise
  error#012DuplicateError: Duplicate keyword name at line 24.

  -----

  The problem seems to be duplicate keys in the ifcfg-eth0, we can try
  and fix this image, but there are probably others with the same
  settings and in general I would assume parsing should be resilient to
  these failures. In addition I am not sure if I understand the logic
  behind reading the current ifcfg and modifying it, we should be able
  to simplify it by overwriting (a backup can be taken for debugging
  purposes) the ifcfg file.

  Attached is a screenshot with contents of the ifcfg file.

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