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[Launchpad Bug Tracker <1788716@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package rax-nova-agent -
2.1.15-0ubuntu1~16.04.1

---------------
rax-nova-agent (2.1.15-0ubuntu1~16.04.1) xenial; urgency=medium

  * debian/rules: Use dh --with systemd to add .service handling to
maintainers cripts

rax-nova-agent (2.1.15-0ubuntu1~16.04.0) xenial; urgency=medium

  * Rebuild for Xenial
  * Use compat level 9 build-depending on debhelper (>= 9) and dh-systemd
  * Use DefaultDependencies=no to prevent forming service ordering cycles
    (LP: #1788716)
  * Clean up after rax-openstack-guest-agents in postinst

rax-nova-agent (2.1.15-0ubuntu1) cosmic; urgency=medium

  * New upstream version 2.1.15 (LP: #1783614)
  * debian/gbp.conf: Declare repository layout
  * Refresh patches

rax-nova-agent (2.1.13-0ubuntu3) bionic; urgency=medium

  * Drain the events queue, until there are no more events, for at least 3
    iterations, before sending started notification. LP: #1765057

rax-nova-agent (2.1.13-0ubuntu2) bionic; urgency=medium

  * Drop xenstore-utils dependency, in favor of ordering after
    proc-xen.mount.
  * Demote xe-guest-utilities to Suggests, until after MIR is done.

rax-nova-agent (2.1.13-0ubuntu1) bionic; urgency=medium

  * Switch to watching upstream releases on GitHub
  * New upstream version 2.1.13
    - Added Netplan support
  * Build-depend on python3-yaml
  * Skip tests newly failing due to lack of proper netplan support
  * Make python3-novaagent depend on xenstore-utils (LP: #1762718)
    Thanks to Dimitri John Ledkov
  * Depend on needed packages: xe-guest-utilities, xenstore-utils and cloud-init
  * Pick configuration files shipped originally in rax-openstack-guest-agents.
    Disable cloud-init network configuration, as nova-agent will do it.
    Override xe-daemon.service unit so that it also avoids default dependencies
    creating systemd's dependency loops with cloud-init.
    Give syslog write access to the kernel logs
  * Don't restart nova-agent service on upgrade
  * Fix nova-agent.service using upstream patches, using notify and local
    .service changes, thanks to Dimitri John Ledkov from some of the patches
  * Depend on python3-systemd which is needed but requiring it as a module
    breaks

rax-nova-agent (2.1.12-0ubuntu2~16.04.0) xenial; urgency=medium

  * Rebuild for Xenial (LP: #1753943)
  * Use compat level 9 build-depending on debhelper (>= 9) and dh-systemd

rax-nova-agent (2.1.12-0ubuntu2) bionic; urgency=medium

  * Make transitional package to be Architecture: all and move it to oldlibs
  * Make the transitional package depend on misc:Depends instead of
    overriding Lintian error

rax-nova-agent (2.1.12-0ubuntu1) bionic; urgency=low

  * Initial release (LP: #1751847)

 -- Balint Reczey <rbalint@xxxxxxxxxx>  Mon, 03 Sep 2018 13:35:58 +0200

** Changed in: rax-nova-agent (Ubuntu Xenial)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1788716

Title:
  rax-nova-agent causes a systemd ordering cycle on boot

Status in rax-nova-agent package in Ubuntu:
  Fix Released
Status in rax-nova-agent source package in Xenial:
  Fix Released
Status in rax-nova-agent source package in Bionic:
  Fix Committed

Bug description:
  [Impact]

   * Booting a cloud instance first time in Rackspace's Cloud fails due to systemd breaking the service ordering cycle and not running cloud-init to provision the instance.
   * Without backporting the fix new instances can't boot.
   
  [Test Case]

   * Prepare an instance image with rax-nova-agent preinstalled and boot
  in Rackspace's network.

  [Regression Potential]

   * The fix may drop too many service dependencies resulting an image
  that does not boot.

  [Original Bug Text

  When booting an instance with it installed, I see the following in the
  log:

  Aug 23 20:37:29 ubuntu systemd[1]: nova-agent.service: Found ordering cycle on basic.target/start
  Aug 23 20:37:29 ubuntu systemd[1]: nova-agent.service: Found dependency on sockets.target/start
  Aug 23 20:37:29 ubuntu systemd[1]: nova-agent.service: Found dependency on uuidd.socket/start
  Aug 23 20:37:29 ubuntu systemd[1]: nova-agent.service: Found dependency on sysinit.target/start

  (I believe the source of the issue is https://github.com/Rackspace-DOT
  /nova-agent/commit/73d8ef1a6256ff05151603ff53bcb018bfdfcc9b, which
  changes the ordering with respect to cloud-init-local.service.)

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