Port ranges - restricting opening and closing ranges

[William Reade]

Agreed. Note, though, that we'll want to give charms a way to know what
ports they have already opened: I think this is a case where
look-before-you-leap maybe beats easier-ask-forgiveness-than-permission
(and the consequent requirement that error messages be parsed...). An
opened-ports hook tool should do the trick.


On Thu, Jun 26, 2014 at 9:18 PM, Gustavo Niemeyer <gustavo at niemeyer.net>
wrote:

> +1 to Mark's point. Handling exact matches is much easier, and does
> not prevent a fancier feature later, if there's ever the need.
>
> On Thu, Jun 26, 2014 at 3:38 PM, Mark Ramm-Christensen (Canonical.com)
> <mark.ramm-christensen at canonical.com> wrote:
> > My belief is that as long as the error messages are clear, and it is
> easy to
> > close 8000-9000 and then open 8000-8499 and 8600-9000, we are fine.    Of
> > course it is "nicer" if we can do that automatically for you, but I don't
> > see why we can't add that later, and I think there is a value in keeping
> a
> > port-range as an atomic data-object either way.
> >
> > --Mark Ramm
> >
> >
> > On Thu, Jun 26, 2014 at 2:11 PM, Domas Monkus <
> domas.monkus at canonical.com>
> > wrote:
> >>
> >> Hi,
> >> me and Matthew Williams are working on support for port ranges in juju.
> >> There is one question that the networking model document does not answer
> >> explicitly and the simplicity (or complexity) of the implementation
> depends
> >> greatly on that.
> >>
> >> Should we only allow units to close exactly the same port ranges that
> they
> >> have opened? That is, if a unit opens the port range [8000-9000], can it
> >> later close ports [8500-8600], effectively splitting the previously
> opened
> >> port range in half?
> >>
> >> Domas
> >>
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>
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>
> gustavo @ http://niemeyer.net
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