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[Robert Schweikert <1801364@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Persistsing OpenStack metadata may fail.

OpenStack has an entry named "random_seed" in the metadata [1]. This
entry is treaded specially in the openstack.py helper when the metadat
is read [2]. The attempt to decode the read data my result in a string
that is not utf-8 compliant which eventually results in an error when we
attempt to persist the metadata as follows:

2018-11-02 12:14:13,755 - __init__.py[WARNING]: Error persisting
instance-data.json: 'utf8' codec can't decode byte 0xc8 in position 2:
invalid continuation byte


[1] https://docs.openstack.org/nova/latest/user/metadata-service.html
[2] https://github.com/cloud-init/cloud-init/blob/master/cloudinit/sources/helpers/openstack.py#L294

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

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https://bugs.launchpad.net/bugs/1801364

Title:
  persisting OpenStack metadat fails

Status in cloud-init:
  New

Bug description:
  Persistsing OpenStack metadata may fail.

  OpenStack has an entry named "random_seed" in the metadata [1]. This
  entry is treaded specially in the openstack.py helper when the metadat
  is read [2]. The attempt to decode the read data my result in a string
  that is not utf-8 compliant which eventually results in an error when
  we attempt to persist the metadata as follows:

  2018-11-02 12:14:13,755 - __init__.py[WARNING]: Error persisting
  instance-data.json: 'utf8' codec can't decode byte 0xc8 in position 2:
  invalid continuation byte

  
  [1] https://docs.openstack.org/nova/latest/user/metadata-service.html
  [2] https://github.com/cloud-init/cloud-init/blob/master/cloudinit/sources/helpers/openstack.py#L294

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