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heat/releasenotes/notes
Harald Jensås 539b2a4c49 Net attr: Sort segments without name attribute first
Useing get_attr, pulling index 0 in the segments list
of a network to associate the a subnet with the "first"
segment is useful since the "first" segment is created
by neutron behind the scenes on network create. A resource
reference cannot be used since the "first" segment is'nt
a heat resource.

The issue is the order of the segments list is'nt reliable.

On stack update index 0 may be a different segment, and
we end up trying to update the segment_id for a subnet.
Changeing the segment association is not allowed, so
the stack update fails.

While not perfect, sorting the list so that segments where
name is None comes first will ensure that index 0 can be used.

The template author should ensure segments defined in the heat
template all have a names set, so that only the segment creted
implicitly by neutron have 'None' name.

Closes-Bug: #1894920
Change-Id: I097aba2a97144327bec188e6c71629d0f6c95901
2020-09-18 14:03:33 +00:00
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