openshift/origin-server — pull request #3170 by pmorie (2013-07-25 18:40:32+00:00)
Title: Upgrade enhancements

Refactor the upgrade code to use well-defined step and itinerary structures. Return a JSON payload of
all relevant upgrade data to facilitate enhancements in higher level upgrade orchestration tools.

Add a new '--rerun' feature to oo-admin-upgrade which allows the re-upgrade of the last run's errors,
facilitating an "upgrade until it succeeds" workflow.