Port ranges - restricting opening and closing ranges

[Domas Monkus]

A follow-up question: should closing a port that was not opened previous to
that result in an error?

Domas


On Fri, Jun 27, 2014 at 2:13 PM, Matthew Williams <
matthew.williams at canonical.com> wrote:

> +1 on an opened-ports hook tool, I've added it to the task list
>
>
> On Fri, Jun 27, 2014 at 9:41 AM, William Reade <
> william.reade at canonical.com> wrote:
>
>> 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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>>
>>
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