juju HA lands on tip

[John Meinel]

The CLI now goes exclusively through the API, so you should be able to
drive it from the GUI as well.

We'll probably need more focused APIs for getting the status of state
machines (right now I think we just put it into "Status" itself, and we'll
want to have a way to get just that information out).

I think quickstart could, indeed, just wait for bootstrap to finish and
then immediately call 'juju ensure-availability'. I don't think you want to
make it the default for all quickstart deployments, given that it consumes
3 machines right off the bat, and people already have difficulties with
having 1 extra machine.

John
=:->


On Fri, Apr 18, 2014 at 5:12 AM, Richard Harding <rick.harding at canonical.com
> wrote:

> On Thu, 17 Apr 2014, roger peppe wrote:
>
> > I've just landed some changes on juju tip that enable "highly available"
> > juju environments. In a HA environment, there are several state servers -
> > if one dies, one of the others should take over.
> >
> > ...
> >
> > There is one major caveat: upgrading an existing environment
> > to HA is not supported currently (Andrew Wilkins has a branch in review
> that
> > should fix this).
>
> Thanks for the heads up Roger. We'll definitely take a peek at this. From a
> GUI perspective, is this something that can be done via the API or planned
> for that? From our end we'd love to be able to have juju-quickstart
> bootstrap an HA environment. We'd also want to monitor and expose the HA
> status in the GUI. Once the upgrading an existing environment lands, it's
> something we'd like to enable to users to be able to take their current
> environment and bring up a HA state server within it.
>
> These instructions sounds like the work for juju-quickstart should be
> possible to just script into the bootstrap process. The rest I've not look
> into yet.
>
> --
>
> Rick Harding
>
> Juju UI Engineering
> https://launchpad.net/~rharding
> @mitechie
>
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