glance/releasenotes/notes/improved-config-options-221...

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---
prelude: >
Improved configuration options for glance. Please
refer to the ``other`` section for more information.
other:
- The glance configuration options have been
improved with detailed help texts, defaults for
sample configuration files, explicit choices
of values for operators to choose from, and a
strict range defined with ``min`` and ``max``
boundaries.
It must be noted that the configuration options
that take integer values now have a strict range defined
with "min" and/or "max" boundaries where appropriate. This
renders the configuration options incapable of taking certain
values that may have been accepted before but were actually
invalid. For example, configuration options specifying counts,
where a negative value was undefined, would have still accepted
the supplied negative value. Such options will no longer accept
negative values. However, options where a negative value was
previously defined (for example, -1 to mean unlimited) will
remain unaffected by this change.
Values that do not comply with the appropriate restrictions
will prevent the service from starting. The logs will contain
a message indicating the problematic configuration option and
the reason why the supplied value has been rejected.