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From Benjamin Bannier <benjamin.bann...@mesosphere.io>
Subject Re: Review Request 55271: Disallow multi-role frameworks to change their roles.
Date Wed, 18 Jan 2017 13:12:01 GMT


> On Jan. 17, 2017, 10:10 a.m., Jay Guo wrote:
> > Also, should we allow user to downgrade from a multi-role framework to single-role?
I feel it would be very complicated and we should explicitly disallow that...
> 
> Benjamin Bannier wrote:
>     I am not sure this is required. We already make sure elsewhere that (1) only one
of `role` or `roles` can be set, and (2) we also make sure that multirole frameworks cannot
change their roles. Are there any implications of a framework opting in and out of `MULTI_ROLE`?
In either case it would be in at most one role (some role or `*`). I have the feeling that
adding such a validation might make experimenting with this feature harder than needed (if
there are no technical reasons to explicitly forbid it). Any ideas @bmahler?
> 
> Jay Guo wrote:
>     I was thinking that in a longer run, is it a valid use case that user wants to downgrade
framework with `roles == {role1, role2}` to `role == role1`?

@guoger: I believe at least for now going from `roles = {A, B}` to `role = A` should be just
as illegal as going from `roles = {A, B}` to `roles = {A}`, I'll update the validation code
to catch that cases as well. We should keep this kind of framework change path in mind for
Phase 2, where I believe we would mutations of `roles`.


- Benjamin


-----------------------------------------------------------
This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/55271/#review161828
-----------------------------------------------------------


On Jan. 17, 2017, 11:20 p.m., Benjamin Bannier wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/55271/
> -----------------------------------------------------------
> 
> (Updated Jan. 17, 2017, 11:20 p.m.)
> 
> 
> Review request for mesos, Benjamin Mahler, Jay Guo, and Guangya Liu.
> 
> 
> Bugs: MESOS-6631
>     https://issues.apache.org/jira/browse/MESOS-6631
> 
> 
> Repository: mesos
> 
> 
> Description
> -------
> 
> We currently do not allow `MULTI_ROLE` frameworks to change their
> roles. This restriction will be lifted later.
> 
> 
> Diffs
> -----
> 
>   src/master/master.hpp 44f4fecb1fbe8bebf830990a59a5462338e6e004 
>   src/tests/master_validation_tests.cpp e5d55e03648cb218d42adc594d6fa7d40ea9bcbb 
> 
> Diff: https://reviews.apache.org/r/55271/diff/
> 
> 
> Testing
> -------
> 
> Tested on various Linux configurations in internal CI.
> 
> 
> Thanks,
> 
> Benjamin Bannier
> 
>


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