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[Launchpad Bug Tracker <1712921@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package nplan - 0.32

---------------
nplan (0.32) bionic; urgency=medium

  * src/nm.c: better handle the UUID generation; the order of iterating
    through interaces may affect things here. Also make sure the tests catch
    a null UUID.

 -- Mathieu Trudel-Lapierre <cyphermox@xxxxxxxxxx>  Tue, 14 Nov 2017
08:53:51 -0500

** Changed in: nplan (Ubuntu Bionic)
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1712921

Title:
  enabling networkd appears to eat up entropy

Status in nplan package in Ubuntu:
  Fix Released
Status in openssh package in Ubuntu:
  Fix Released
Status in systemd package in Ubuntu:
  Triaged
Status in nplan source package in Xenial:
  New
Status in openssh source package in Xenial:
  New
Status in systemd source package in Xenial:
  New
Status in nplan source package in Zesty:
  New
Status in openssh source package in Zesty:
  New
Status in systemd source package in Zesty:
  New
Status in nplan source package in Artful:
  In Progress
Status in openssh source package in Artful:
  Fix Released
Status in systemd source package in Artful:
  Triaged
Status in nplan source package in Bionic:
  Fix Released
Status in openssh source package in Bionic:
  Fix Released
Status in systemd source package in Bionic:
  Triaged

Bug description:
  [Impact]
  Booting systems have a limited amount of entropy, especially in some of the cloud cases. We should avoid using it up unnecessarily.

  [Test cases]

  == netplan ==
  1) Boot system with netplan config; using networkd renderer
  2) Validate that it starts and does not cause undue delay.
  2b) strace nplan at boottime (the netplan generator at /lib/systemd/system-generators/netplan) and validate it does not call get_random() / uuid_generate().
  3) Validate that config with NetworkManager renderer generates UUIDs.

  [Regression potential]
  Netplan depends on UUID generation to create correct networkManager configuration for VLANs. This is a specific use-case that is typically not hit, but any failure to generate valid NetworkManager configuration would be a regression from this SRU.

  ---

  enabling networkd appears to eat up entropy

  as seen in openssh autopkgtest failing, when networkd is enabled by
  default.

  See http://autopkgtest.ubuntu.com/packages/openssh/artful/amd64 with
  triggers systemd/234-2ubuntu9

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