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[Sergey Kraynev <skraynev@xxxxxxxxxxxx>]

Public bug reported:

The follow scenario leads to error:
 - create independent port in neutron
 - boot VM in nova
 - attach port to VM via nova interface-attach. As result dns_name of port will be updated and port be attached to VM
 - detach port from VM via nova interface-detach. As result port will be detached, BUT dns_name will be still as name of VM.

if you try to attach this port to another VM you will get error, that
it's not possible to attach port.


The same issue happens for Heat stack, when we have VM+port and execute update replace for Server.

** Affects: heat
     Importance: High
         Status: New

** Affects: neutron
     Importance: Undecided
         Status: New

** Affects: nova
     Importance: Undecided
         Status: New


** Tags: mitaka-backport-potential

** Description changed:

  The follow scenario leads to error:
-  - create independent port in neutron
-  - boot VM in nova
-  - attach port to VM via nova interface-attach. As result dns_name of port will be updated and port be attached to VM
-  - detach port from VM via nova interface-detach. As result port will be detached, BUT dns_name will be still as name of VM.
+  - create independent port in neutron
+  - boot VM in nova
+  - attach port to VM via nova interface-attach. As result dns_name of port will be updated and port be attached to VM
+  - detach port from VM via nova interface-detach. As result port will be detached, BUT dns_name will be still as name of VM.
  
  if you try to attach this port to another VM you will get error, that
  it's not possible to attach port.
+ 
+ 
+ The same issue happens for Heat stack, when we have VM+port and execute update replace for Server.

** Also affects: heat
   Importance: Undecided
       Status: New

** Changed in: heat
    Milestone: None => newton-1

** Tags added: mitaka-backport-potential

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https://bugs.launchpad.net/bugs/1572593

Title:
  Impossible attach detached port to another instance

Status in heat:
  New
Status in neutron:
  New
Status in OpenStack Compute (nova):
  New

Bug description:
  The follow scenario leads to error:
   - create independent port in neutron
   - boot VM in nova
   - attach port to VM via nova interface-attach. As result dns_name of port will be updated and port be attached to VM
   - detach port from VM via nova interface-detach. As result port will be detached, BUT dns_name will be still as name of VM.

  if you try to attach this port to another VM you will get error, that
  it's not possible to attach port.

  
  The same issue happens for Heat stack, when we have VM+port and execute update replace for Server.

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