Phil Zampino created KNOX-1107:

             Summary: Remote Configuration Registry Client Service
                 Key: KNOX-1107
             Project: Apache Knox
          Issue Type: Bug
          Components: Server
    Affects Versions: 0.15.0
            Reporter: Phil Zampino
            Assignee: Phil Zampino

There are currently multiple ZooKeeper clients in Knox, in the form of HA 
provider URL managers.
These clients has been added to Knox independently, each without concern for 
the other. KNOX-1010 introduces yet another such client.

In order to manage the configuration of these clients, it would be good to have 
a Client Service, from which these features can retrieve a ZooKeeper client.

Furthermore, in the future, Knox may support additional configuration 
registries (e.g., consul, etcd), which these features may wish to employ. If 
this service is abstracted sufficiently, the underlying registry type can be a 
simple configuration change.

In addition to managing security configuration for these clients, the service 
may also be able to enforce some ACL constraints on referenced znodes (or other 
registry entries) to mitigate the consumption of untrusted configuration.

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