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[Satya Sanjibani Routray <engg.sanj@xxxxxxxxx>]

Public bug reported:

When VMs goes to ERROR state after the block device mapping nova updates the quota for adding the instance/CPU/RAM to the quota
but when we delete those VMs nova forgets the release/update the CPU/RAM/Instance quota 

Steps to reproduce:
1. Set the quota limit for volumes to 10 and VMs to 50
2. create 20 VMs by using option boot from volume from horizon
Observation:
10 VMs comes to active state and 10 goes to ERROR state (As expected)

3. delete all VMs

Expectation: CPU/RAM/Instance used quota will come to "0"
Actual: CPU/RAM/Instance quota is not coming to "0" 
CPU used quota shows 10 (As the VM is created from M1.SMALL flavor)
Instance quota shows 10
RAM quota shows 20480MB

which is quite unexpected

Its seems it is a blocker for Ocata release

I am running from the stable/Ocata

** Affects: nova
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1668267

Title:
  Nova ignores to update the quota for VMs in error

Status in OpenStack Compute (nova):
  New

Bug description:
  When VMs goes to ERROR state after the block device mapping nova updates the quota for adding the instance/CPU/RAM to the quota
  but when we delete those VMs nova forgets the release/update the CPU/RAM/Instance quota 

  Steps to reproduce:
  1. Set the quota limit for volumes to 10 and VMs to 50
  2. create 20 VMs by using option boot from volume from horizon
  Observation:
  10 VMs comes to active state and 10 goes to ERROR state (As expected)

  3. delete all VMs

  Expectation: CPU/RAM/Instance used quota will come to "0"
  Actual: CPU/RAM/Instance quota is not coming to "0" 
  CPU used quota shows 10 (As the VM is created from M1.SMALL flavor)
  Instance quota shows 10
  RAM quota shows 20480MB

  which is quite unexpected

  Its seems it is a blocker for Ocata release

  I am running from the stable/Ocata

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