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[Launchpad Bug Tracker <1576333@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package pollinate - 4.18-0ubuntu2~16.04

---------------
pollinate (4.18-0ubuntu2~16.04) xenial-proposed; urgency=medium

  * debian/pollinate.service: Move installation from network.target to
    multi-user.target. network.target is too early and causes dependency loops
    with e. g. NFS. (LP: #1576333)
  * debian/pollinate.preinst: Clean up old enablement symlink on upgrade. This
    needs to be kept until after 18.04 LTS.

 -- Martin Pitt <martin.pitt@xxxxxxxxxx>  Thu, 19 May 2016 09:45:48
+0200

** Changed in: pollinate (Ubuntu Xenial)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1576333

Title:
  runs to early, causes dependency loops

Status in pollinate package in Ubuntu:
  Fix Released
Status in pollinate source package in Xenial:
  Fix Released
Status in pollinate source package in Yakkety:
  Fix Released

Bug description:
  The first half of the original bug report got fixed in bug 1578833,
  but pollinate still runs to early.

  SRU INFORMATION
  ===============
  Impact: Causes service failures during boot when using NFS mounts, regression from bug 1578833
  Reproducer:
   - sudo apt-get install -y nfs-common pollinate
   - echo "1.2.3.4:/foo /mnt nfs defaults,nofail 0 0" | sudo tee -a /etc/fstab
     (This will start network-online.target during early boot)
   - sudo reboot
   - Confirm that "sudo journalctl -b -p warning" shows a dependency loop, and most probably "systemctl status network-online.target" is not running.
   - Upgrade to the proposed pollinate update, reboot.
   - Confirm that there is no dependency loop any more and "systemctl status network-online.target" is active.
   - Confirm that "systemctl status pollinate" is "enabled" (it will have "start: condition failed", but that is intended).
   - Confirm that /etc/systemd/system/network.target.wants/pollinate.service does not exist any more.

  Regression potential: Low. This merely changes when pollinate.service
  gets activated, and network.target is too early (nothing should
  actually be started by network.target, this is mostly meant for
  shutdown). The main thing that can go wrong is that the upgrade still
  leaves the old
  /etc/systemd/system/network.target.wants/pollinate.service symlink
  behind (the maintainer scripts have to clean that up).

  Original bug report:

  pollinate runs too early on some of the instances i launch.  Basically
  nothing guarantees that it will have network access when it attempts
  to run.

  failure looks something like:
  $ lxc launch xenial x1
  $ sleep 4
  $ lxc exec x1 systemctl status pollinate
  ● pollinate.service - Seed the pseudo random number generator on first boot
     Loaded: loaded (/lib/systemd/system/pollinate.service; enabled; vendor preset: enabled)
     Active: inactive (dead) since Thu 2016-04-28 17:16:03 UTC; 1min 17s ago
    Process: 86 ExecStart=/usr/bin/pollinate (code=exited, status=0/SUCCESS)
   Main PID: 86 (code=exited, status=0/SUCCESS)

  Apr 28 17:16:03 ubuntu systemd[1]: Starting Seed the pseudo random number generator on first boot...
  Apr 28 17:16:03 ubuntu pollinate[106]: client sent challenge to [https://entropy.ubuntu.com/]
  Apr 28 17:16:03 ubuntu pollinate[86]: <13>Apr 28 17:16:03 pollinate[86]: client sent challenge to [https://entropy.ubuntu.com/]
  Apr 28 17:16:03 ubuntu pollinate[149]: [432B blob data]
  Apr 28 17:16:03 ubuntu pollinate[86]: Apr 28 17:16:03 ubuntu <13>Apr 28 17:16:03 pollinate[86]: WARNING: Network communication failed [0]\n  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
  Apr 28 17:16:03 ubuntu pollinate[86]:                                  Dload  Upload   Total   Spent    Left  Speed
  Apr 28 17:16:03 ubuntu pollinate[86]: [139B blob data]
  Apr 28 17:16:03 ubuntu pollinate[86]: 17:16:03.859980 * Closing connection 0
  Apr 28 17:16:03 ubuntu pollinate[86]: curl: (6) Could not resolve host: entropy.ubuntu.com
  Apr 28 17:16:03 ubuntu systemd[1]: Started Seed the pseudo random number generator on first boot.

  This seems like it might work:
  # diff -u /lib/systemd/system/pollinate.service.dist  /lib/systemd/system/pollinate.service
  --- /lib/systemd/system/pollinate.service.dist	2016-04-28 17:19:10.807971336 +0000
  +++ /lib/systemd/system/pollinate.service	2016-04-28 17:19:17.839874541 +0000
  @@ -2,6 +2,7 @@
   Description=Seed the pseudo random number generator on first boot
   DefaultDependencies=no
   After=sysinit.target
  +After=network.target
   Before=ssh.service

   [Service]

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: pollinate 4.15-0ubuntu1 [modified: usr/bin/pollinate]
  ProcVersionSignature: Ubuntu 4.4.0-18.34-generic 4.4.6
  Uname: Linux 4.4.0-18-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
  Date: Thu Apr 28 16:39:17 2016
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
  SourcePackage: pollinate
  UpgradeStatus: No upgrade log present (probably fresh install)

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