I should also add that my understanding from conversations in IRC is that if operating system upgrade is needed, then you

1. upgrade Kolla-Ansible to the crossover version, then 2. rebuild that same control plane onto new machines with the newer operating system (or perhaps pull them out, rebuild and put back in again, depending on how many you have for redundancy) 3. upgrade Kolla-Ansible to a later version as needed

For us, I /believe/ Ussuri is the crossover version because it supports both Ubuntu Bionic and Focal - we will need to check that before embarking on the upgrade. Can anyone confirm, also whether I am barking mad with the above understanding?

On 19/8/22 16:39, Gregory Orange wrote:

Hi Wodel,

We haven't done it yet (but will need to soon since we're on Train and stable/train branch is gone!) but this looks like a good place to start:

https://docs.openstack.org/kolla-ansible/train/user/operating-kolla.html

I'm not sure about this, but it came up in a web search and might help too:

https://www.reversengineered.com/2019/05/10/upgrading-kolla-ansible-for-depl...

HTH, Greg.

On 18/8/22 18:07, wodel youchi wrote:

...

Hi,

What are the steps of upgrading an openstack platform when the upgrade involves:

• OS upgrade: how to perform the upgrade? What type of node to upgrade

first? Controllers, network or compute?

• Ceph storage when using HCI deployment?

Just general steps.