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[Launchpad Bug Tracker <1712921@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package nplan - 0.32~17.10.1

---------------
nplan (0.32~17.10.1) artful; urgency=medium

  * Backport 0.32 to Ubuntu 17.10. (LP: #1713142)

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.

nplan (0.31) bionic; urgency=medium

  [ Mathieu Trudel-Lapierre ]
  * src/nm.c: generate a UUID for a connection only as needed; when we're
    dealing with NM VLANs. (LP: #1712921)
  * debian/tests/autostart: Make the autostart test more verbose and avoid
    failing right from the start when systemd-networkd is disabled.
    (LP: #1699371)
  * tests/integration.py: bump the NetworkManager timeout for settling to
    120 seconds, autopkgtest infrastructure tends to be a little slow for the
    network device configuration to be applied and noticed by NM.
    (LP: #1699371)

  [ Dimitri John Ledkov ]
  * Reload udevd to invalidate configuration cache of .rules/.link files
    as generate step may have changed them. LP: #1669564

  [ Dan Streetman ]
  * Add another interface driver exception to netplan replug to prevent unbind
    of the Xen VIF interfaces. (LP: #1729573)

 -- Mathieu Trudel-Lapierre <cyphermox@xxxxxxxxxx>  Thu, 23 Nov 2017
12:30:51 -0500

** Changed in: nplan (Ubuntu Artful)
       Status: Fix Committed => 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:
  Fix Committed
Status in openssh source package in Xenial:
  New
Status in systemd source package in Xenial:
  New
Status in nplan source package in Zesty:
  Fix Committed
Status in openssh source package in Zesty:
  New
Status in systemd source package in Zesty:
  New
Status in nplan source package in Artful:
  Fix Released
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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