[Openstack-operators] [tags] ease of upgrade

Tom Fifield tom at openstack.org
Tue Sep 15 08:11:26 UTC 2015

Hi all,

One of our long mooted tags has been something that captures the ease of 
upgrade for a service.

We've got a lot of inherit knowledge about this stuff that would be 
great to capture, for example:

* Swift just eats upgrades up - whether you go for every point release, 
or do the N to N+1 jump, provided you read the release notes it's 
basically always a good time with Swift.
* Nova's upgrade_levels is pretty amazing, too. In recent versions you 
can run N+1 apis with a mix of N and N+1 compute nodes - quite convenient.
* Neutron in some configurations dumps all of the flows, you have to 
watch dhcp timeouts, how long services are offline etc, so a few little 
traps that keep it from being perfect.

If we could somehow make this into a tag, that'd be great. Anyone want 
to have a go?



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