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[Bug 1919188] Re: cloud-init: checking cmdline for ip= is too broad

 

This bug is believed to be fixed in cloud-init in version 21.2. If this
is still a problem for you, please make a comment and set the state back
to New

Thank you.

** Changed in: cloud-init
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1919188

Title:
  cloud-init: checking cmdline for ip= is too broad

Status in cloud-init:
  Fix Released

Bug description:
  klibc initramfs in debian (and I think Ubunutu as well) allows the
  'iscsi_target_ip=' cmdline parameter to specify an iscsi device
  attachment. The cloud-init code to check "whether this system has
  klibc initramfs network config or not" checks if the 'ip=' string is
  present in the cmdline. The python code to do this
  (https://github.com/canonical/cloud-
  init/blob/master/cloudinit/net/cmdline.py#L75) will match any
  parameter in the cmdline that contains 'ip='. For iSCSI volumes, the
  code still works (by accident?) because the next line checks for an
  open-iscsi interface file, which should exist if we are using iSCSI.

  However, it raises the possibility that there are other commandline
  parameters being used out in the wild that contain 'ip=' that may
  erroneously be marked by cloud-init as specifying an initramfs network
  config option. An example fix would be using a regular expression to
  check that either whitespace or beginning of the line precedes 'ip'.

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References