[Bug 1627641] Re: Backport netplan to xenial

[Chris Halse Rogers]

Hello Martin, or anyone else affected,

Accepted systemd into xenial-proposed. The package will build now and be
available at https://launchpad.net/ubuntu/+source/systemd/229-4ubuntu11
in a few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to
enable and use -proposed.  Your feedback will aid us getting this update
out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, and change the tag
from verification-needed to verification-done. If it does not fix the
bug for you, please add a comment stating that, and change the tag to
verification-failed.  In either case, details of your testing will help
us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Changed in: systemd (Ubuntu Xenial)
       Status: In Progress => Fix Committed

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https://bugs.launchpad.net/bugs/1627641

Title:
  Backport netplan to xenial

Status in network-manager package in Ubuntu:
  Fix Released
Status in nplan package in Ubuntu:
  Fix Released
Status in systemd package in Ubuntu:
  Fix Released
Status in network-manager source package in Xenial:
  Fix Committed
Status in nplan source package in Xenial:
  Fix Committed
Status in systemd source package in Xenial:
  Fix Committed

Bug description:
  For snappy (at first at least) we need to provide netplan in xenial,
  as for the first snappy GA release we must not use any PPAs any more.

  netplan's NetworkManager backend depends on two patches to read
  configuration and connections from /run/NetworkManager/. These will
  need to be backported for full netplan support; but they are not
  required for snappy as this will use a snapped NM. However, this will
  need a temporary hack
  (https://code.launchpad.net/%7Emorphis/netplan/+git/netplan/+merge/306607)
  until snaps can actually properly support OS components like
  NetworkManager.

  PATCHES:
  https://git.launchpad.net/~network-manager/network-manager/+git/ubuntu/commit/?h=xenial&id=6dcdb85
  https://anonscm.debian.org/cgit/pkg-systemd/systemd.git/commit/?h=ubuntu-xenial&id=4e9c52b0bb

  REGRESSION POTENTIAL:
  netplan: The risk for existing installations is practically zero as nplan does not exist in xenial yet and thus will not be pulled in during upgrades.

  NetworkManager: Nothing in xenial expects/uses /run/NetworkManager/
  and as it's an ephemeral tmpfs there is no risk of existing files
  there. If the patches are broken it could in theory happen that
  NetworkManager also does not properly read files from
  /etc/NetworkManager/ any more, so the -proposed package must verify
  that existing connections still work.

  systemd: This does change behavior of networkd quite a bit: RA is now
  being handled in userpsace instead of the kernel, there are some new
  virtual device types, LLDP support, etc., and there are no (known)
  backwards incompatibilities. The 229 version was known buggy with
  DHCPv6 (we disabled these two test cases), and judging by the feedback
  in Debian 231 is now reasonably stable. networkd is not being used by
  default or advertised in Ubuntu 16.04 (so far), so this will not
  affect the vast majority of installations. But while we have quite
  good test coverage, it cannot be ruled out that we break some custom
  setup that uses networkd.

  TEST PLAN:
  1. Run "NetworkManager --print-config" and save the output.
  2. Install the proposed NetworkManager and confirm that existing connections (from /etc/NetworkManager/system-connections) still work.
  3. Run "NetworkManager --print-config" again and verify that the output is the same as in step 1.
  4. netplan has a very comprehensive integration test suite run as autopkgtest, which covers NetworkManager (including the /run patches) and network. Confirm that it succeeds.

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