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[Launchpad Bug Tracker <1718548@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package ubuntu-fan - 0.12.6

---------------
ubuntu-fan (0.12.6) artful; urgency=medium

  * fanatic: Add short success delay to nc_send (LP: #1721352)
  * fanatic: Catch test preparation steps failing (LP: #1718548)
  * fanatic: Add DNS checks to local-test preparation (LP: #1718548)

ubuntu-fan (0.12.5) artful; urgency=medium

  * DEP8: Fix LXD default interface detection (LP: #1718548)
  * fanctl: return error on fail_up (LP: #1719644)

 -- Stefan Bader <stefan.bader@xxxxxxxxxxxxx>  Fri, 06 Oct 2017 12:15:38
+0200

** Changed in: ubuntu-fan (Ubuntu)
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1718548

Title:
  ubuntu-fan autopkgtests are broken against systemd-resolved

Status in ubuntu-fan package in Ubuntu:
  Fix Released
Status in ubuntu-fan source package in Xenial:
  New
Status in ubuntu-fan source package in Zesty:
  New

Bug description:
  Now that 17.10 has migrated to netplan+systemd-networkd+systemd-
  resolved by default, ubuntu-fan autopkgtests are failing; at least one
  reason for this failure is wrong detection of the default network
  interface because autopkgtest environments appear for some reason to
  be getting multiple default routes:

  autopkgtest [20:14:59]: test lxd: [-----------------------
  Error: either "dev" is duplicate, or "ens2" is a garbage.
  II: Auto-init LXD...
  LXD has been successfully configured.
  II: Creating Fan Bridge...
  /usr/sbin/fanatic: .0.0/16: unknown underlay network format
  FAIL: Error on enable-fan
  autopkgtest [20:15:10]: test lxd: -----------------------]

  (https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac
  /autopkgtest-artful/artful/amd64/u/ubuntu-
  fan/20170916_203221_4f037@/log.gz)

  The other part failure appears to be a race with systemd-resolved in
  setting up the network inside of docker containers:

  autopkgtest [17:25:39]: test docker: [-----------------------
  Running in the Canonical CI environment
  II: Auto-create Fan Bridge...
  configuring fan underlay:10.220.0.0/16 overlay:250.0.0.0/8
  II: Create docker Fan Network...
  configuring docker for underlay:10.220.0.0/16 overlay:250.0.0.0/8 (fan-250 250.4
  6.84.0/24)
  1c8a03aa50ab88b997c3b3aee88bfa6933b14368f1594db4a800c2ae8d62074f
  II: Test docker...
  local docker test: pulling container images ...
  Using default tag: latest
  latest: Pulling from library/ubuntu
  d5c6f90da05d: Pulling fs layer
  [...]
  2b8db33536d4: Pull complete
  Digest: sha256:2b9285d3e340ae9d4297f83fed6a9563493945935fc787e98cc32a69f5687641
  Status: Downloaded newer image for ubuntu:latest
  local docker test: creating test container ...
  5cbdd232b71bc0738f27f1fa3eae4360716bfe3f8cea976874bf6309b1843169
   slave: installing ping ...
  W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/xenial/InRelease  Temporary failure resolving 'archive.ubuntu.com'
  [...]
  E: Unable to locate package iputils-ping
   slave: installing nc ...
  E: Unable to locate package netcat-openbsd
  test master: ping test (250.46.84.2) ...
  test slave: ping test (250.46.84.1) ...
  test slave: ping test ... FAIL
  --- transcript start ---
  /bin/sh: 108: ping: not found
  --- transcript end ---
  test slave: short data test (250.46.84.2 -> 250.46.84.1) ...
  test master: ping test ... PASS
  test master: short data test (250.46.84.1 -> 250.46.84.2) ...
  autopkgtest [20:12:19]: ERROR: timed out on command [...]

  I've reproduced this problem locally and prepared a partial patch
  based on a similar fix to the docker.io package's autopkgtests - but
  so far this only fixes races in the lxd test, not in the docker test,
  so it needs further investigation.

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