[Starlingx-discuss] Questions on StarlingX upgrades

[Pratik M.]

Barton, this information was very helpful. Thanks.

On Wed, Feb 17, 2021 at 9:17 PM Wensley, Barton <
Barton.Wensley at windriver.com> wrote:

> Pratik – see my responses to your questions below.
>
>
>
> Bart
>
>
>
> *From:* Pratik M. <pvmpublic at gmail.com>
> *Sent:* Wednesday, February 17, 2021 1:33 AM
> *To:* starlingx-discuss at lists.starlingx.io
> *Subject:* [Starlingx-discuss] Questions on StarlingX upgrades
>
>
>
> [Please note: This e-mail is from an EXTERNAL e-mail address]
>
> Hi,
> Looking at the URL below, I had a few questions to understand the overall
> upgrade strategy.
>
> https://docs.starlingx.io/specs/specs/stx-4.0/approved/starlingx-2007403-platform-upgrades.html
>
> Q1: Can I assume that from R4.0 onwards, the intent is that all future
> releases will support seamless upgrades for both minor and major versions.
>
> *[Bart] You can’t assume this because:*
>
>    1. *Upgrades are not supported for minor versions – moving from one
>    minor version to the next would be done by building patches for the updated
>    packages and applying them. The starlingx community does not provide
>    patches – you would need to do this on your own (or use a commercial
>    distribution of starlingx that supports patching).*
>    2. *Upgrades between major versions are supported by the
>    infrastructure described in the specification you referenced above.
>    However, the starlingx community does not  test or support upgrades. To do
>    an upgrade, you would need to do your own upgrade testing and fix any
>    issues you uncover. Upgrades often require additional changes on the “from”
>    release side, so you would likely need to build your own patches as well.*
>
>
> Q2: Is downgrade an explicit non-goal?
>
> *[Bart] Correct – starlingx does not support downgrades.*
>
> Q3: Any hooks for non-stx applications to backup and restore their state?
>
> *[Bart] No*
>
> Q4: For a simplex edge node, it involves a N+1 ISO (re)installation. Is a
> more seamless option on the roadmap
>
> *[Bart] No*
>
> Q5. For a simplex edge subcloud, possible to orchestrate this from the
> central cloud?
>
> *[Bart] Similar to upgrades, there is an infrastructure for this (i.e.
> dcmanager upgrade-strategy commands). These  commands haven’t been included
> in the starlingx documentation yet and similar to upgrades, the starlingx
> community does not test or support these commands.*
>
> Q6: Any non-goals for the seamless upgrade, like say CentOS upgrade?.
>
> *[Bart] There has been no decision yet on whether starlingx will be moving
> to a new version of CentOS or to a different Linux distribution so I can’t
> comment on this yet.*
>
> Any pointers to additional info are very welcome.
>
> Thanks in advance
> Pratik
>
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