Wonderful details, Phil!
On Fri, Aug 25, 2017 at 9:40 AM, Philip Zampino <pzamp...@gmail.com> wrote: > Thanks! I've added the Ambari API details to the wiki. > > On Fri, Aug 25, 2017 at 8:27 AM, larry mccay <lmc...@apache.org> wrote: > > > HI Phil - > > > > Thank you for digging into this topic! > > > > I've added you as a contributor to the wiki and you should be able to > edit > > the KIP now. > > > > thanks, > > > > --larry > > > > On Thu, Aug 24, 2017 at 3:45 PM, Philip Zampino <pzamp...@gmail.com> > > wrote: > > > > > I've put together a quick python POC targeting Ambari as the discovery > > > source, just to prove that we can indeed get the necessary details via > > > Ambari's REST API. > > > It generates a proper topology.xml descriptor based on a simple > > descriptor > > > (I chose YAML for this POC), which has a reference to what I've called > a > > > policy descriptor (the <gateway/> portion of the topology descriptor). > > > > > > I am currently unable to update the KIP, but I can share the REST APIs > > I've > > > employed if there is interest. > > > > > > As a result, I'm wondering if Knox should support provider > configuration > > > references in topology.xml, rather than having to duplicate it across > > > descriptors. > > > So, instead of <gateway><provider>...</gateway> in each topology.xml, > > have > > > a single element that points to an external provider config (e.g., > > > <policy-ref>$GATEWAY_HOME/conf/policy/my-named-provider- > > > config.xml</policy-ref>). > > > I've already externalized it for input to the POC, but I'm still > copying > > > the contents into the resulting topology descriptor; I think it would > be > > > better to copy only the reference. > > > > > > Thoughts? > > > > > > - Phil > > > > > > > > > On Fri, Aug 18, 2017 at 1:55 PM, larry mccay <lmc...@apache.org> > wrote: > > > > > > > Good to hear, Phil. > > > > > > > > Yes, I was looking to go back and add some of the API specifics and > > > > investigation details for at least Ambari and ZK. > > > > If others make sense to add such as Consul, etcd, etc that would be > > good > > > as > > > > well and it would help to tease out some of what may be needed for > the > > > > abstraction API and config. > > > > > > > > > > > > On Fri, Aug 18, 2017 at 1:52 PM, Philip Zampino <pzamp...@gmail.com> > > > > wrote: > > > > > > > > > This sounds like a good improvement from a usability perspective. > > > > > > > > > > I agree that Knox must continue its support for direct topology > (XML) > > > > > definitions, but for those deployments where there is a service > > > registry > > > > > (e.g., Ambari, Zookeeper, Consul, etc...) with knowledge of the > > > topology, > > > > > the simplified config coupled with the service discovery could > reduce > > > > > topology (especially ServiceConnectivity) errors. > > > > > > > > > > I also agree that consolidating provider configurations into named > > > sets, > > > > > which can be referenced from topology configurations, will be a > good > > > > > change, especially if there are commonly grouped providers employed > > by > > > > > multiple topologies. > > > > > > > > > > Concerning the TODO sections, is your intention is that they > contain > > > the > > > > > respective API facilities that will provide the information needed > to > > > > > populate a topology definition? > > > > > > > > > > - Phil > > > > > > > > > > On Fri, Aug 18, 2017 at 12:39 PM, larry mccay <lmc...@apache.org> > > > wrote: > > > > > > > > > > > All - > > > > > > > > > > > > I have published an initial stab at a proposal for simplifying > > > topology > > > > > > management [1] - as I briefly mentioned on the 0.14.0 planning > > > thread. > > > > > > > > > > > > There are a couple TODO sections that need some investigation for > > > > Ambari > > > > > > API and Zookeeper Registry API as discovery plugins. > > > > > > > > > > > > Please give the KIP a read and let me know if it makes sense or > if > > > you > > > > > > would like to take on specific pieces of this work. If you would > > like > > > > to > > > > > > add other options or ideas, etc. > > > > > > > > > > > > I think that this will have a huge impact as usability > improvements > > > for > > > > > > management of the gateway! > > > > > > > > > > > > thanks, > > > > > > > > > > > > --larry > > > > > > > > > > > > 1. > > > > > > https://cwiki.apache.org/confluence/display/KNOX/KIP-8+ > > > > > > Service+Discovery+and+Topology+Generation > > > > > > > > > > > > > > > > > > > > >
