group.of.nepali.translators team mailing list archive

[Dimitri John Ledkov <launchpad@xxxxxxxxxxxx>]

This is incomplete request, essentially requesting "backport all of
networkd" which is not appropriate for a targetted fixes that SRUs
require.

Can you not use zesty on your system?

** Changed in: systemd (Ubuntu Xenial)
       Status: New => Incomplete

** Changed in: systemd (Ubuntu Yakkety)
       Status: New => Incomplete

** No longer affects: systemd (Ubuntu Xenial)

** No longer affects: systemd (Ubuntu Yakkety)

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https://bugs.launchpad.net/bugs/1673092

Title:
  systemd doesn't wait until the tentative flag isn't removed before
  firing units depending on network-online.target

Status in systemd package in Ubuntu:
  Fix Released

Bug description:
  [Impact]

  See this issue for details
  https://github.com/systemd/systemd/issues/2037

  Basically, while DAD is running checks on a ipv6 address, no service can
  bind the interface, which could provoke units to fail. Disabling DAD is
  a workaround as explained here [1], but ideally systemd should wait until
  the tentative flag is removed. v232 doesn't have this issue. Can the relevant
  patches be backported to LTS releases?

  [Test Case]

  1. Configure ipv6 address on one interface
  2. Create unit with After=network-online.target that pings a host over
     ipv6
  3. Restart the system (may need several reboots as it's a race condition)

  [Regression Potential]

  * Unknown

  [Other Info]

  * Seems to have been fixed on v232.
  * Using ifupdown or networkd to create the interface seems to be irrelevant
    (upstream bug report uses networkd, while I use ifupdown)

  [1]:
  https://www.agwa.name/blog/post/beware_the_ipv6_dad_race_condition

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