Failed to allocate network error when creating vms

Solution In Progress - Updated -

Issue

  • Randomly getting "Failed to allocate network"
  • Cisco ACI
  • BuildAbortException: Build of instance XXXX aborted: Failed to allocate the network(s), not rescheduling.

  • Timeout of ~ 300 seconds between events:

    2018-07-13 20:20:00.136 561173 DEBUG nova.compute.manager [XXXX] Preparing to wait for external event network-vif-XXXXX prepare_for_instance_event /usr/lib/python2.7/site-packages/nova/compute/manager.py:328
2018-07-13 20:25:01.501 561173 WARNING nova.virt.libvirt.driver [XXX - - -] [instance: XXX] Timeout waiting for vif plugging callback for instance XXX

Environment

  • Red Hat OpenStack Platform 10.0

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