[pve-devel] [PATCH qemu-server] config: add system and service credentials support

[Thomas Lamprecht]

Am 03.04.25 um 09:49 schrieb Thomas Lamprecht:
> Am 02.04.25 um 16:36 schrieb Maximiliano Sandoval:
>> Allows to pass system and service credentials to a VM. See [1] for a
>> description of credentials. This can be potentially used to provision a
>> VM as per [2]. Values can be passed either as plain text or as a base64
>> encoded string when the base64 flag is set.
> 
> Would this also make sense for Containers?
> 
> If it's something we can expose for all guests, we could also (later) look
> into implementing some simple registry (like a mappings type) fulfilling
> what the snippets approach would  provide one while having it nicely
> integrated into our access control system.
> 
>>
>> A VM configuration file which, for example, contains:
>>
>>     systemd-cred0: name=foo,value=bar
>>     systemd-cred1: name=encoded-foo,value=YmFy,base64=1
> 
> Tangentially related: Moving the VM config fully over to section config
> parsing would get us list/array support for free – albeit the move might be
> rather costly..
Oh, and one alternative would be to provide just one `systemd-credenentials` key
here that always refers to such a credential mapping, which has then an array
of all the credentials with their name and value.

As I checked [fdo-sc] and there are like 50 supported credentials, some with
a glob to allow sets of credentials per type like for network or udev rules,
so 15 might not cut it quite fast even if the use-case is not _that_ complex.

[fdo-sc] https://www.freedesktop.org/software/systemd/man/latest/systemd.system-credentials.html