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[Matt Riedemann <mriedem.os@xxxxxxxxx>]

** Also affects: nova/newton
   Importance: Undecided
       Status: New

** Changed in: nova/newton
       Status: New => In Progress

** Changed in: nova/newton
     Assignee: (unassigned) => Lee Yarwood (lyarwood)

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https://bugs.launchpad.net/bugs/1656774

Title:
  NFS share not mounted due to findmnt behaviour change

Status in OpenStack Compute (nova):
  Fix Released
Status in OpenStack Compute (nova) newton series:
  In Progress

Bug description:
  Description
  ===========
  The following findmnt behaviour change present in util-linux-2.23.2-33 causes libvirt_utils.is_mounted to incorrectly return True when a share is already mounted on a host but not by Nova, for example in an allinone/devstack environment where cinder-volume is running on the same host and has already mounted the share :

  findmnt --target behaviour changed in 7.3, shows all mount-points in chroot
  https://bugzilla.redhat.com/show_bug.cgi?id=1405238

  Steps to reproduce
  ==================
  - Install devstack with the NFS plugin on a RHEL 7.3, CentOS 7.3 or Fedora 25 host.
  - Attempt to launch a volume backed instance.

  Expected result
  ===============
  NFS share mounted by both Nova and Cinder allowing the instance to launch correctly.

  Actual result
  =============
  NFS share only mounted by Cinder causing the instance to fail to launch.

  Environment
  ===========
  1. Exact version of OpenStack you are running. See the following
     list for all releases: http://docs.openstack.org/releases/

     devstack (master) + devstack-plugin-nfs (master) + CentOS 7.3
     
  2. Which hypervisor did you use?
     (For example: Libvirt + KVM, Libvirt + XEN, Hyper-V, PowerKVM, ...)
     What's the version of that?

     Libvirt + KVM

  2. Which storage type did you use?
     (For example: Ceph, LVM, GPFS, ...)
     What's the version of that?

     NFS

  3. Which networking type did you use?
     (For example: nova-network, Neutron with OpenVSwitch, ...)

     n/a

  Logs & Configs
  ==============

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