[pve-devel] [PATCH proxmox 01/19] notify: switch to file-based templating system

[Lukas Wagner]

On  2024-04-19 10:57, Fiona Ebner wrote:
> Am 19.04.24 um 10:45 schrieb Lukas Wagner:
>>> Who adds the template files? I don't see a patch for proxmox-ve in this
>>> series. Does this series require some versioned breaks to some package?
>>
>> The pve-manager and pve-ha-manager (for fencing notifications) patches add the templates.
>> I can't use `/usr/share/pve-manager` and `/usr/share/pve-ha-manager` because 
>> proxmox_notify needs to have a single base directory from where to load template files.
>> Maybe we should use some other base dir to avoid confusion with the `proxmox-ve` metapackage?
>>> 
> Ah, I see. Yes, maybe a directory named based on libpve-notify-perl
> would be better or proxmox-notify (but would need to be a bit careful
> with co-installed PBS and PVE to not create accidental conflicts).

mhmm. In PBS we install the templates in /usr/share/proxmox-backup/... (there it makes sense,
because the templates are part of the .deb with the same name).
Using `proxmox-notify` would IMO be not so good. We might have similar notification templates in
both products (e.g. package-updates) which are not necessarily 100% compatible.
Of course we could unify them, but I kinda prefer the flexibility of
having these separate.

A name based on libpve-notify implies that the templates belong to
PVE, which is good. However, that only shifts the problem:
pve-{ha-,}manager still install templates to a location which appears
to be owned by another package, this time libpve-notify...

Thinking about the options, and also about 'user experience' when
adding overridable templates, I think we could just keep on
using 'proxmox-ve' here.

> 
>> In terms of versions:
>> pve-{ha}-manager needs to pull in a bumped libpve-notify-perl
>> libpve-notify-perl needs to pull in bumped libpve-rs-perl/libproxmox-rs-perl
>> libpve-rs-perl needs to pull in bumped librust-proxmox-notify
>>
>> I really wish the dep-chain was a bit easier, yet here we are.
>>
> 
> But there also is a need for versioned breaks, right? Because installing
> new libpve-notify-perl (using new proxmox-perl-rs using new
> proxmox-notify) without also upgrading pve-manager and pve-ha-manager
> will be broken or am I missing something?

Ah yes, sorry, my packaging knowledge is not yet the best.
A versioned break will be necessary due to the API changes (passing a template name
instead of a title/body) and due to the fact that the template
files must be present.

-- 
- Lukas