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upgrade in openstack

asked 2017-06-20 03:42:15 -0500

sanjana gravatar image

What is the best way to upgrade openstack

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Quite open question, there are many methods, all depend on your current deployment, available resources, downtime allowed, etc. It differs too much from a blue-green upgrade to a live upgrade to an offline upgrade. Please, provide more information about your current deployment and your goals.

Eduardo Gonzalez gravatar imageEduardo Gonzalez ( 2017-06-20 04:06:25 -0500 )edit

Also, what services are you using, they have different upgrade methods, what openstack release and what ha solution is implemented (keepalived/haproxy, pacemaker/corosync)

Eduardo Gonzalez gravatar imageEduardo Gonzalez ( 2017-06-20 04:08:18 -0500 )edit

@Eduardo Gonzalez i am looking out for upgrade solutions with minimal downtime for an internal production cloud running newton.(no shutdown) For the basic services like neutron, nova, glance, horizon, heat, cinder, keystone with haproxy i am just trying to identity procedures to go about it

sanjana gravatar imagesanjana ( 2017-06-20 04:33:10 -0500 )edit

@Eduardo Gonzalez i basically want to understand the starting point to begin with the upgrade so that i will be able to design solution which would help me upgrade to higher versions of openstack in future

sanjana gravatar imagesanjana ( 2017-06-20 04:34:19 -0500 )edit

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answered 2017-06-20 18:57:30 -0500

Since there are a million ways to deploy OpenStack, I guess it's hard to provide detailed upgrade instructions that fit all cases.

The operations guide has a somewhat high-level chapter on upgrading. To that, you should add the upgrade sections of the relevant release notes, for example Nova/Ocata (scroll down to the Upgrade Notes section).

There are also instructive summit presentations on upgrades, such as this recent one.

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Thank you for the links. I will use it as a start point and maybe explore more around the topic. Overall i would like to understand if upgrades can be done without having to "shoutdown" services. Is this a compulsion?

sanjana gravatar imagesanjana ( 2017-06-20 22:49:14 -0500 )edit

Most, perhaps all core services allow rolling upgrades with no or very minimal downtime. This means that your cloud runs versions n and n+1 in parallel during the upgrade.

Bernd Bausch gravatar imageBernd Bausch ( 2017-06-21 00:16:52 -0500 )edit

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Asked: 2017-06-20 03:42:15 -0500

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Last updated: Jun 20 '17