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[Corey Bryant <corey.bryant@xxxxxxxxxxxxx>]

This bug was fixed in the package nova - 2:15.1.3-0ubuntu1~cloud1
---------------

 nova (2:15.1.3-0ubuntu1~cloud1) xenial-ocata; urgency=medium
 .
   * d/control: Drop circular dependencies. nova-compute depends on
     nova-compute-* packages. nova-compute-* packages shouldn't depend
     on nova-compute. nova-compute-* should however depend on nova-common.
     (LP: #1761140).


** Changed in: cloud-archive/ocata
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1761140

Title:
  [SRU] dpkg eror processing package nova-compute

Status in Ubuntu Cloud Archive:
  Triaged
Status in Ubuntu Cloud Archive mitaka series:
  Triaged
Status in Ubuntu Cloud Archive ocata series:
  Fix Released
Status in Ubuntu Cloud Archive pike series:
  Fix Released
Status in Ubuntu Cloud Archive queens series:
  Triaged
Status in Ubuntu Cloud Archive rocky series:
  Triaged
Status in OpenStack Compute (nova):
  Invalid
Status in nova package in Ubuntu:
  Fix Released
Status in nova source package in Xenial:
  Triaged
Status in nova source package in Bionic:
  Triaged
Status in nova source package in Cosmic:
  Fix Released

Bug description:
  [Impact]

  Hello!
  I've encountered the bug while installing Nova on compute nodes:

  ...
  Setting up qemu-system-x86 (1:2.11+dfsg-1ubuntu5~cloud0) ...
  Setting up qemu-kvm (1:2.11+dfsg-1ubuntu5~cloud0) ...
  Setting up qemu-utils (1:2.11+dfsg-1ubuntu5~cloud0) ...
  Setting up python-keystone (2:13.0.0-0ubuntu1~cloud0) ...
  Processing triggers for initramfs-tools (0.122ubuntu8.11) ...
  update-initramfs: Generating /boot/initrd.img-4.4.0-116-generic
  Setting up nova-compute-libvirt (2:17.0.1-0ubuntu1~cloud0) ...
  adduser: The user `nova' does not exist.
  dpkg: error processing package nova-compute-libvirt (--configure):
   subprocess installed post-installation script returned error exit status 1
  dpkg: dependency problems prevent configuration of nova-compute-kvm:
   nova-compute-kvm depends on nova-compute-libvirt (= 2:17.0.1-0ubuntu1~cloud0); however:
    Package nova-compute-libvirt is not configured yet.

  dpkg: error processing package nova-compute-kvm (--configure):
   dependency problems - leaving unconfigured
  Setting up python-os-brick (2.3.0-0ubuntu1~cloud0) ...
  No apport report written because the error message indicates its a followup error from a previous failure.
  Setting up python-nova (2:17.0.1-0ubuntu1~cloud0) ...
  Setting up nova-common (2:17.0.1-0ubuntu1~cloud0) ...
  Setting up nova-compute (2:17.0.1-0ubuntu1~cloud0) ...
  Processing triggers for libc-bin (2.23-0ubuntu10) ...
  Processing triggers for systemd (229-4ubuntu21.2) ...
  Processing triggers for ureadahead (0.100.0-19) ...
  Processing triggers for dbus (1.10.6-1ubuntu3.3) ...
  Errors were encountered while processing:
   nova-compute-libvirt
   nova-compute-kvm
  ...

  Installation failed when executing 'post-installation script'.
  After some investigation I've found out that if I've create 'nova' user BEFORE running package installation, it's will be succeded.

  [Test Case]

  Steps to reproduce
  ------------------
  1. Prepare the node for installing nova-compute packages
  2. Run 'apt-get install nova-compute'

  Expected result
  ------------------
  Nova-compute installed successfully without errors

  Actual result
  ------------------
  Installation failed with dpkg error

  Workaround
  ------------------
  1. Create system user: add to /etc/passwd
     nova:x:64060:64060::/var/lib/nova:/bin/false
  2. Create system group: add to /etc/group
     nova:x:64060:
  3. Run 'apt-get install nova-compute'

  My Environment
  ------------------
  Ubuntu 16.04.4 LTS, 4.4.0-116-generic
  Openstack Queens Release
  Nova 17.0.1-0ubuntu1

  [Regression Potential]
  Should be very low. This is a very minor dependency chain to prevent a dependency circular loop.

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