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[John Davidge <jodavidg@xxxxxxxxx>]

Public bug reported:

The create_subnet flow was recently re-factored as part of the ongoing
neutron-ipam work, and has broken the process for requesting a specific
subnet. Before the refactor, a user could request a subnet from the
implicit (None) pool by supplying a cidr and not a subnetpool_id in the
request. This would not be over-ridden in cases where a value for
default_ipv4_subnet_pool or default_ipv6_subnet_pool had been set, but
now it is over-ridden by the default. This causes an error when
requesting a specific subnet if a default value is set.

To recreate in devstack:

1. Set default_ipv4_subnet_pool and/or default_ipv6_subnet_pool in /opt/stack/neutron/etc/neutron.conf to any value other than None, e.g default_ipv6_subnet_pool = "prefix_delegation"
2. Run the ./stack.sh script with ip_version set appropriately for the defaults set above. It will fail when trying to create the default networks.

** Affects: neutron
     Importance: Undecided
     Assignee: John Davidge (john-davidge)
         Status: New

** Changed in: neutron
     Assignee: (unassigned) => John Davidge (john-davidge)

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https://bugs.launchpad.net/bugs/1471316

Title:
  _get_subnetpool_id does not return None when a cidr is specified and a
  subnetpool_id isn't.

Status in OpenStack Neutron (virtual network service):
  New

Bug description:
  The create_subnet flow was recently re-factored as part of the ongoing
  neutron-ipam work, and has broken the process for requesting a
  specific subnet. Before the refactor, a user could request a subnet
  from the implicit (None) pool by supplying a cidr and not a
  subnetpool_id in the request. This would not be over-ridden in cases
  where a value for default_ipv4_subnet_pool or default_ipv6_subnet_pool
  had been set, but now it is over-ridden by the default. This causes an
  error when requesting a specific subnet if a default value is set.

  To recreate in devstack:

  1. Set default_ipv4_subnet_pool and/or default_ipv6_subnet_pool in /opt/stack/neutron/etc/neutron.conf to any value other than None, e.g default_ipv6_subnet_pool = "prefix_delegation"
  2. Run the ./stack.sh script with ip_version set appropriately for the defaults set above. It will fail when trying to create the default networks.

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