[Bug 1712921] Update Released

[Brian Murray]

The verification of the Stable Release Update for nplan has completed
successfully and the package has now been released to -updates.
Subsequently, the Ubuntu Stable Release Updates Team is being
unsubscribed and will not receive messages about this bug report.  In
the event that you encounter a regression using the package from
-updates please report a new bug using ubuntu-bug and tag the bug report
regression-update so we can easily find any regressions.

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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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