View source for Web Operations/Reference Specification/Discussion Pages/zookeeper

== Overview ==
We had a discussion around [http://zookeeper.apache.org/ ZooKeeper]. This was basically a discussion about weather we should provision a ZooKeeper instance for every project or have one ZooKeeper cluster to for the entire cloud.

=== tl;dr ===
We decided to use one single ZooKeeper cluster.

=== The Whole Story ===
* Multiple ZooKeepers would be more of a hassle to maintain
** Would need to track every issue back to the correct instance for a project
* We need a way to share certain data across projects, this is not possible with multiple instances
* We can back [https://projects.puppetlabs.com/projects/hiera hiera] with ZooKeeper and solve the hiera issue at the same time
* ZooKeeper is hierarchical and can be secured based on these hierarchies