Constraints & series support

Gustavo Niemeyer gustavo at
Tue Mar 26 01:37:16 UTC 2013

Sounds good, thanks for the details, William.

On Mon, Mar 25, 2013 at 10:12 PM, William Reade
<william.reade at> wrote:
> On Sun, 2013-03-24 at 17:28 -0300, Gustavo Niemeyer wrote:
>> Hey there,
>> Asking as a juju user here: I know there's work in progress both to
>> implement constraints and to fix the series support in the Go port.
>> When should I expect to be able to use these?
> Series support will become useful to amazon users starting at the next
> release.
> Support for simple constraints is minimally present, but again only on
> amazon and only starting with the next release; but, thus far, only the
> first machine started actually honours them, and service constraints are
> not used.
>> I'm happy to run stuff from tip, obviously. :-)
> For users running on tip, the story wrt series is slightly different; it
> is currently present for amazon environments, but is very hard to use
> effectively in dev mode due to incompatibilities between tip and the
> latest released tools; in practice, it is very useful if you're running
> precise and barely useful at all if you're not. Once we've released some
> public tools that can handle it, and until we break compatibility with
> those, it will probably be more helpful.
> Cheers
> William
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