On Tue, May 13, 2014 at 05:06:48PM -0700, Adam Bordelon wrote:
> Chengwei,
>
> You can restart the leading master (with new roles/config), and running
> frameworks/slaves will re-register with it. Tasks will keep running. You
> probably want to restart the non-leading masters first with the new config, so
> that it will be picked up on HA failover.
> You can also restart the slave processes with the new resource-roles config
> and
> running tasks will continue running, as long as you have slave checkpointing
> enabled.
Thanks Adam, generally I did the same thing to update configuration of
my cluster, it seems works fine.
However, I have one thing needs a confirm.
After resources configuration changed for a slave, it has to remove
/tmp/mesos/meta/slaves/latest and then start the slave.
Due to it can not checkpoint from different resources configuration.
I'm not sure if this has any side-effect, can you confirm?
--
Thanks,
Chengwei
> You also need to restart the framework-scheduler so that it can reregister
> with
> the new role (in its FrameworkInfo), and get new offers appropriate for that
> role. Tasks will keep running.
>
> You need to restart the master (with new roles config) before restarting the
> framework (with new role in its FrameworkInfo), or else the framework will
> fail
> to reregister ("Role 'foo' is not valid."). I would recommend restarting the
> master first, then the slave(s), then the framework. Currently running tasks
> will continue running, regardless of role configuration. The new role(s) will
> only apply to new resource offers.
>
> Hope that helps,
> -Adam-
>
>
> On Tue, May 13, 2014 at 2:31 PM, Vinod Kone <[email protected]> wrote:
>
> Hey Chengwei,
>
> Mesos doesn't allow online update of its configuration. The only
> exception,
> so far, has been the VLOG level.
>
> To update resources, you should roll the slave with new flags.
>
>
> On Sun, May 11, 2014 at 12:02 AM, Chengwei Yang
> <[email protected]
> > wrote:
>
> Hi List,
>
> Generally I have a question: does mesos cluster can reload
> configuration
> on the fly? Without side-effect to on-top frameworks, jobs?
>
> I have read the upgrad guide,
> http://mesos.apache.org/documentation/latest/upgrades/
>
> and slave recovery guide,
> http://mesos.apache.org/documentation/latest/slave-recovery/
>
> However, I didn't see any statement says about does the upgrade hurt
> on-top frameworks, jobs.
>
> My situation is: I have a mesos 0.16 cluster up and running, some
> frameworks and jobs running, and I want to add another framework, and
> like to add a dedicate role for it, so change should made to mesos
> master, and resolve some resources for it, so change should made to
> mesos slaves.
>
> Could I do this seamlessly? Thanks in advance!
>
> --
> Thanks,
> Chengwei
>
>
>
>
