Comment 5 for bug 849071

I tend to agree with Clint on this one. This would be an awesome thing to
have available.
This could make demos and automation really flow.

Thanks,

Juan

On Tue, Sep 13, 2011 at 12:18 PM, Clint Byrum <email address hidden> wrote:

> Excerpts from Gustavo Niemeyer's message of Tue Sep 13 18:35:28 UTC 2011:
> > For instance, the fact you want to wait for bootstrapping is generally a
> > side-effect of the lack of compound commands (stacks).
> >
>
> At some point we have to let go of the idea that everybody can write
> effective asynchronous scripts. It may not be at the "wait for bootstrap"
> level, but users need to be able to write straight forward, blocking
> scripts, or they'll do evil things like polling with sub-second timeouts.
>
> Even with a stack, I can see wanting
>
> deploy-stack --wait-for-relations
>
> Which means wait for all relations in the stack to be up before returning.
> This would allow somebody's continuous deployment system to *know* that
> the new stack at least did everything *it* expected to do already. If
> you make them poll *all* of the services, you're not really helping them
> with automation. More than likely they'll just pick the one they perceive
> as being "last" and poll that.. possibly racing with other services and
> then having a less reliable experience when some new formula slows down
> that process.
>
> Its a wishlist item, we can live without it. We can workaround it by
> doing what I did, polling status, but seems kind of silly to have that
> as an external script when it would be *super* easy inside ensemble.
>
> --
> You received this bug notification because you are subscribed to
> Ensemble.
> https://bugs.launchpad.net/bugs/849071
>
> Title:
> Ensemble needs to support wait cli option
>
> Status in Ensemble:
> Confirmed
>
> Bug description:
> Everytime I bootstrap or deploy something .. I always wait an undetermined
> amount of time for ec2 to "catch-up"
> Can we have a "wait" option such that the ensemble command doesn't return
> till the operation is completed
> ensemble bootstrap [-w | --wait]
>
> This should be supported for various operations:
> - Bootstrap
> - deploy (till it's started, or install_error I guess + I guess should set
> exit status)
> - add-unit
>
> Perhaps there should even be a "ensemble wait" that waits on all async
> operations to finish, so I can like
>
> for i in `seq 1 5`; do ensemble add-unit foo ; done
> ensemble wait
>
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>