[openstack-dev] Live update of openstack

Manickam, Kanagaraj kanagaraj.manickam at hp.com
Fri Aug 1 05:52:55 UTC 2014


This mail is generic to all openstack service and explained the problem with respect to heat here.

I have come across the situation where, updates are involved in the heat db model and corresponding code changes in the heat-engine component. Now assume that in a given deployment, there are two heat-engines and customer wants to update as follows:

1.       Run db sync and update the first heat-engine and restart the heat-engine

2.       Don't touch the second heat-engine.

In this scenario, first heat-engine will work properly as its updated with new db change done by the db sync. But second heat-engine is not updated and it will fail. To address this problem, would like to know if any other service came across the same scenario and a solution is already provided? Thanks.

Kanagaraj M
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