bootstrap constraints

[Matt Rae]

Thanks John and Dimiter. The issue I'm referring to is the one that John
described.

Yeah a solution could be to have separate arguments to set constraints on
bootstrap and on environment. I personally haven't required the additional
environment constraint that you get with 'juju bootstrap --constraint', and
I've always unset it after bootstrapping.

Matt

On Thu, Aug 27, 2015 at 12:19 PM, John Meinel <john at arbash-meinel.com>
wrote:

> I think his issue is that he can "juju bootstrap --constraints" and then
> immediately "juju set-env" to remove the constraints.  But "juju quickstart
> --constraints" does a bootstrap and then immediately starts deploying the
> services without a way to unset the constraints that don't apply to all
> machines.
>
> I do think we've talked about wanting to split the "these are the
> constraints for the machine I'm bootstrapping" vs "these are the
> constraints for the environment within", but we haven't fully worked
> through how we would spell that.
>
> John
> =:->
> On Aug 27, 2015 10:22 AM, "Dimiter Naydenov" <
> dimiter.naydenov at canonical.com> wrote:
>
>> -----BEGIN PGP SIGNED MESSAGE-----
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>> On 27.08.2015 07:29, Matt Rae wrote:
>> > Hi All, when using 'juju bootstrap --constraints' the constraint is
>> > used for bootstrap, but the constraint is also set on the
>> > environment for future machines.
>> >
>> > Is it helpful to set the additional environment constraint?
>> >
>> > So far I've frequently seen the bootstrap constraint used to
>> > choose which node to bootstrap to, for example 'juju bootstrap
>> > --constraints "tags=juju"'. In this case, normally the constraint
>> > set on the environment needs to be cleared after bootstrap to
>> > deploy to machines not tagged 'juju'.
>> >
>> > With bootstrap --constraints at least we can clear the constraint
>> > after bootstrap completes, but with quickstart --constraints, there
>> > doesn't appear to be way to clear the constraint before juju gui
>> > starts deploying the bundle using the environment constraint which
>> > I don't want to use for additional machines. So it appears to break
>> > the use case of using --constraints to bootstrap to a particular
>> > machine.
>> >
>> > Matt
>> >
>> >
>> Hi Matt,
>>
>> When you're saying you're unable to clear the constraints set at
>> bootstrap from the environment, do you mean "tags" specifically, or
>> other constraints as well? If the former, but not the latter, read on.
>>
>> I've recently discovered there's *no* way to unset a bootstrap (or
>> environment) constraint value of type list (e.g. "tags=aa,bb,^cc,dd",
>> mostly undocumented "networks=..." and since a few days - "spaces=..."
>> with the same format). This issue appears to have been lurking for a
>> long time - just try this:
>>
>> $ juju environment set-constraints tags=foo,^bar
>> $ juju environment get-constraints
>> tags=foo,^bar
>> $ juju environment set-constraints tags=   # expected: set to empty
>> $ juju environment get-constraints
>> tags=foo,^bar
>>
>> So, I fixed this on master a few days ago, and in 1.25 it *will* be
>> possible to unset list-style constraints (note that, as before, you
>> can still set them to different non-empty value).
>> If your issue is like described above, you might want to give
>> 1.25-alpha1 a try.
>>
>> Cheers,
>> - --
>> Dimiter Naydenov <dimiter.naydenov at canonical.com>
>> Juju Core Sapphire team <http://juju.ubuntu.com>
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