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[Sean Dague <sean@xxxxxxxxx>]

There was still no information provided about why the CPU Filter threw
out the rest of the nodes. That is the important bit here that we need
to move forward.

As such, closing as Invalid. If someone is able to put more detailed
debug into the scheduler to figure out which hosts get dumped at the
Disk and CPU filter parts for what reason, and provide that, please do
and we can reopen.

** Changed in: nova
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/1630658

Title:
  nova-scheduler fails when running out of disk space

Status in OpenStack Compute (nova):
  Invalid

Bug description:
  Description
  ===========

  When trying to launch an instance and nova determines that a compute
  node is out of disk space, other hypervisors are not considered for
  scheduling.

  Steps to reproduce
  ==================

  OpenStack deployed using local storage on two nodes (using Kolla), 50 GB disk in my lab.
  Launch instances until disk is near full, fex 2 Centos with flavor with 20 GB disk.
  Launch another instance with flavor 20 GB disk.

  Expected Result
  ===============
  Nova schedules the "other instance" on the second compute host where there are sufficient resources.

  Actual Result
  =============
  Nova fails with "Not Enough Hosts"

  [req-a822f4c7-1788-4ff3-b03f-91db6d722937
  ec4d0ac3f3684b1db4fa82449091339a df00326cc81048c28466529f82f4cf1a - -
  -] Filtering removed all hosts for the request with instance ID
  'fb1ee3fe-3230-4d3a-a6d2-7b4a5bae1c09'. Filter results: ['RetryFilter:
  (start: 4, end: 4)', 'AvailabilityZoneFilter: (start: 4, end: 4)',
  'RamFilter: (start: 4, end: 4)', 'DiskFilter: (start: 4, end: 2)',
  'ComputeFilter: (start: 2, end: 0)']\n",

  Environment
  ===========

  OpenStack Version: mitaka, installed from Kolla stable/mitaka

  Hypervisor: KVM Linux 3.10.0-327.el7.x86_64 #1 SMP Thu Nov 19 22:10:57
  UTC 2015 GNU/Linux

  Storage: Local

  Networking: Neutron

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