Open Stack

On 21.01.2020 10:16, Tony Pearce wrote:
> I am planning to upgrade my Openstack Pike. Please could I ask some 
> questions about this so I understand better how to proceed?
> *Background*:
> - I have Openstack Pike running on 3 nodes (2 x compute and 1 x 
> controller). Storage is provided by a Cinder driver and separate vendor 
> storage array (iSCSI).
> 
> - I have a bug which is impacting Cinder in Pike which is not present in 
> Queens/Stein.
> 
> - Since I installed Openstack some years ago, I was not able to 
> update/patch it for a number of reasons.
> 
> - The Openstack which I installed was from the tripleo.org 
> <http://tripleo.org> website and I followed the instructions there.
> 
> - I have configured LBaaS that was available in Pike by making config 
> changes to .conf files.
> 
> - I recall reading a few months ago when I started looking into this 
> that I need to update to the latest within the current version (Pike) 
> first, before updating beyond Pike so I am planning for that.
> 
> 
> *Questions*:
> 1. do I first need to deconfigure / remove the LBaaS before attempting 
> an upgrade beyond Pike?
> 2. The tripleo website is a little confusing. I am running Pike and it 
> is not containerised. The upgrade info on tripleo.org 
> <http://tripleo.org> mentions upgrades to Pike in a containerised 

You should use official TripleO documentation [0]

[0] 
https://docs.openstack.org/tripleo-docs/latest/upgrade/developer/upgrades/major_upgrade.html

> environment. So should I follow the detail for the "Ocata and earlier" 
> release in this case? ref: 
> http://tripleo.org/upgrade/minor_update.html#updating-your-overcloud-ocata-and-earlier
> 3. Do I need to upgrade to each release? ie from Pike > Queens then 
> Queens > Stein etc ? Or can I do this:
> a) update Pike to the latest in the current Pike release
> b) Update Pike to Train

You have to do it one by one, interleaving the two steps: upgrading 
undercloud [1] firstly, then the overcloud. There is FFU (fast-forward 
upgrade) [2] but AFAIK it is only expected to work when going from 
Newton to Queens.
Upgrading by N+3 from Pike to Stein would involve upgrading OS major 
version on hosts, so that guide wouldn't fit it.

FFU from Queens to Train is under developed.

[1] 
https://docs.openstack.org/project-deploy-guide/tripleo-docs/latest/post_deployment/upgrade/undercloud.html
[2] 
https://docs.openstack.org/tripleo-docs/latest/upgrade/developer/upgrades/fast_fw_upgrade.html

> 
> 
> *What I've gathered so far:*
> - If I can execute the 'openstack overcloud update' and limit it to the 
> controller node then I can apply this to a cloned environment consisting 
> of 1 x undercloud "director" and 1 x controller but I am unable to stage 
> this for the compute nodes because they are physical bare-metal
> 
> - the tripleo website guide lists the latest as 'Rocky' but I could see 
> Stein in the yum search. I think I can follow the tripleo guide with a 
> pinch of salt and replace *rocky* with *stein*
> 
> 
> 
> Thank you
> 
> 
> *Tony Pearce*| *Senior Network Engineer / Infrastructure Lead
> **Cinglevue International <https://www.cinglevue.com>*
> 
> Email: tony.pearce at cinglevue.com <mailto:tony.pearce at cinglevue.com>
> Web: http://www.cinglevue.com <http://www.cinglevue.com/>**
> 
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-- 
Best regards,
Bogdan Dobrelya,
Irc #bogdando