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Posted to user@zookeeper.apache.org by Jordan Zimmerman <jz...@netflix.com> on 2012/03/13 00:32:04 UTC

Cool news on the Curator/Exhibitor front - rolling release/upgrade

I'm pretty excited about this one so I want to pre-annouce it. I'm currently working on rolling release/upgrade support in Exhibitor and Curator.

For Exhibitor:
    * Ensemble list, config values, etc. are centralized (via Amazon S3, a shared file, etc.)
    * If the ensemble list changes, Exhibitor will stage the change so that each instance in the ensemble
       applies the change one at a time, thus accomplishing a rolling release
    * New servers can be added to the ensemble this way without taking down the cluster

For Curator:
    * Curator can now be configured to poll the Exhibitor instances to get the list of ZK servers in the ensemble
    * Curator will use the updated ensemble list when creating connections.
    * If a Sys-Disconnected is received and there is a new ensemble list, Curator will close the current ZK
       handle and create a new one using the updated list.

Coming soon!

-Jordan

Re: Cool news on the Curator/Exhibitor front - rolling release/upgrade

Posted by Garret Hayes <gh...@cacheiq.com>.

Woohoo! This is great news Jordan! 

On 12.03.2012, at 18:32, "Jordan Zimmerman" <jz...@netflix.com> wrote:

> I'm pretty excited about this one so I want to pre-annouce it. I'm currently working on rolling release/upgrade support in Exhibitor and Curator.
> 
> For Exhibitor:
>    * Ensemble list, config values, etc. are centralized (via Amazon S3, a shared file, etc.)
>    * If the ensemble list changes, Exhibitor will stage the change so that each instance in the ensemble
>       applies the change one at a time, thus accomplishing a rolling release
>    * New servers can be added to the ensemble this way without taking down the cluster
> 
> For Curator:
>    * Curator can now be configured to poll the Exhibitor instances to get the list of ZK servers in the ensemble
>    * Curator will use the updated ensemble list when creating connections.
>    * If a Sys-Disconnected is received and there is a new ensemble list, Curator will close the current ZK
>       handle and create a new one using the updated list.
> 
> Coming soon!
> 
> -Jordan