Bug 1271382

Original GH Issue: https://github.com/openshift/openshift-docs/issues/622

Snip from Issue:

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I think this needs an overhaul:
https://github.com/openshift/openshift-docs/blob/master/architecture/infrastructure_components/image_registry.adoc

I would actually propose that this be subsumed in a page that discusses the components that run on top of the basic infrastructure, which include:

routers
registry
keepalived
In the near future, private git server a la gitolite
optionally some authentication pieces
possibly other admin bits, like a project creation manager
Eventually - monitoring infrastructure, log aggregators, continuous integration, etc etc

These might deserve separate pages eventually, but for now I think it would be a good idea to discuss them in one place, separately from the master/nodes stuff. Partly because the great thing about all this is that using the infrastructure it can all be made redundant and HA without a great deal of trouble.

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I think this is still worth doing. Structure-wise, suggest something like (note slightly different naming of existing titles as well):

Architecture
  Overview
  Infrastructure
      Kubernetes Components
      Integration Components [1]
      Web Console
  Core Concepts
    ...
  Additional Concepts
    ...

[1] new topic as mentioned above; could become a subsection down the road