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[Bug 1163394] Re: nova-manage out of memory error creating many floating IPs

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Alan Pevec <1163394@xxxxxxxxxxxxxxxxxx>
Date: Fri, 10 May 2013 00:06:11 -0000
Reply-to: Bug 1163394 <1163394@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

** Changed in: nova/grizzly
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1163394

Title:
  nova-manage out of memory error creating many floating IPs

Status in OpenStack Compute (Nova):
  Fix Committed
Status in OpenStack Compute (nova) grizzly series:
  Fix Released

Bug description:
  https://bugzilla.redhat.com/show_bug.cgi?id=918761

  Summarizing the downstream bug report, if we do something silly like
  CONFIG_NOVA_NETWORK_FLOATRANGE=192.168.2.224/2 , which creates an
  unreasonably huge number of floating IP addresses, nova-manage can run
  out of memory.

  The workaround is to loop over the range and not create more than
  BIG_NOT_HUGE_NUMBER of floating IP addresses in one call to
  floating_ip_bulk_create.  (At which point trying to create a silly
  number of floating IPs would probably still fail, but with a better
  exception related to exhausting IP address, rather than an
  OutOfMemoryError.)

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