[Bug 1584147] Re: cloud-init hangs on boot as Python waits for sufficient randomness to start

[Scott Moser]

i also marked the cloud-images task as 'fix-released' as it is now fixed
in a daily image and was not broken in any released image (only ever
broken in yakkety), so its as released as it can be.

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Title:
  cloud-init hangs on boot as Python waits for sufficient randomness to
  start

Status in cloud-images:
  Fix Released
Status in Python:
  Fix Released
Status in python3.5 package in Ubuntu:
  Fix Released
Status in python3.5 package in Debian:
  Fix Released

Bug description:
  If Python 3.5 starts before the kernel has initialised its RNG, it
  will hang[0] until there is sufficient entropy for it to randomise
  dictionary keys.

  As cloud-init uses Python 3.5, this means that cloud-init will hang
  until this happens (meaning that the instance won't be properly
  initialised).

  I have seen this cause a hang of up to 7 minutes on an OpenStack
  cloud.

  Upstream python bug is issue 26839 [1].

  [0] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=822431
  [1] https://bugs.python.org/issue26839

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