TripleO QuickStart HA Setup && Keeping undercloud persistent between cold reboots

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This post follows up http://lxer.com/module/newswire/view/230814/index.html
and might work as timer saver unless status undecloud.qcow2 per
http://artifacts.ci.centos.org/artifacts/rdo/images/mitaka/delorean/stable/
requires fresh installation to be done from scratch
So, we intend to survive VIRTHOST cold reboot (downtime) and keep previous version of undercloud VM been able to bring it up avoiding build via quickstart.sh and restart procedure from logging into undercloud and immediately run overcloud deployment.

Complete text may be seen here http://bderzhavets.blogspot.com/2016/06/tripleo-quickstart-ha-setup-keeping.html