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[Bug 1012822] Re: broken instances are considered to be consuming resources

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Chris Dent <cdent+lp@xxxxxxxxxxxxx>
Date: Tue, 15 Mar 2016 14:51:02 -0000
Reply-to: Bug 1012822 <1012822@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

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

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https://bugs.launchpad.net/bugs/1012822

Title:
  broken instances are considered to be consuming resources

Status in OpenStack Compute (nova):
  Invalid

Bug description:
  nova/scheduler/host_manager.py uses a simple model for determination
  if a host has enough resources to run a new instance. It simply adds
  all resources for all instances that are scheduled for that host.
  However, these instances can be broken (in ERROR state) - they can
  simply do not exist at all, so, they don's consume resources. An
  instance can be broken if there are no free networks, if its images
  are improper, or even due to RPC timeout in nova-compute as it
  happens. These instances cannot be revived and should not be taken
  into account.

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