How to correctly setup the partition table for systemd-sysupdate?

[Renjaya Raga Zenta]

Hi, thank you for the answer.

I use the linux-generic partition to put raw images as the [Source] for
systemd-sysupdate. For now, I don't want to spawn a http server for this.

So you mean I need to have this kind of partition table?

+-----+------+------------+------------+----------------------------------+
| esp | root | empty root | empty root | linux-generic for put raw images |
+-----+------+------------+------------+----------------------------------+

On Mon, Jan 8, 2024 at 8:33 PM Adrian Vovk <adrianvovk at gmail.com> wrote:

> You shouldn't be using a linux-generic partition for updates. You need (at
> least) two of the same kind of partition to switch between whenever there's
> an update
>
> On Mon, Jan 8, 2024, 06:46 Renjaya Raga Zenta <ragazenta at gmail.com> wrote:
>
>> Hi,
>>
>> I've been experimenting with systemd-sysupdate, trying to understand how
>> it works.
>>
>> I created a Fedora 39 image¹ with mkosi from the GitHub repo. It has 3
>> partitions:
>> 1) esp
>> 2) root
>> 3) linux-generic (to put updates)
>>
>> The root and third partition will be expanded on firstboot via
>> systemd-growfs². I also configured the third partition to be automounted
>> with udev rules.
>>
>> I created a configuration file in /usr/lib/sysupdate.d: 10-root.conf
>> [Transfer]
>> ProtectVersion=%A
>>
>> [Source]
>> Type=regular-file
>> Path=/run/media/system/UPDATES
>> MatchPattern=demo_ at v.root-x86-64.raw
>>
>> [Target]
>> Type=partition
>> Path=auto
>> MatchPartitionType=root
>>
>> Let's say, first, I created version 0.1.0: demo_0.1.0.raw, then I created
>> version 0.1.1 with SplitArtifacts=yes in mkosi.conf. So I had
>> demo_0.1.1.esp.raw and demo_0.1.1.root-x86-64.raw. I put
>> demo_0.1.1.root-x86-x64.raw to /run/media/system/UPDATES.
>>
>> I ran /usr/lib/systemd/systemd-sysupdate list, it correctly showed the
>> available update candidate. But then I ran
>> /usr/lib/systemd/systemd-sysupdate update, it showed an error about the
>> partition table.
>>
>> "Partition table has less than two partition slots of the right type
>> 4f68bce3-xxxx-yyyy-truncated (root-x86-64), refusing."
>>
>> I've tried adding more 2 root partition slots, but still got the same
>> error. I've also tried adding PaddingMinBytes/PaddingMaxBytes in
>> /usr/lib/repart.d/.
>>
>> Maybe I missed something here. How to correctly setup the partition table
>> for systemd-sysupdate?
>>
>> Thanks.
>>
>> [1] I'm working on Debian stable based image, but unfortunately
>> systemd-sysupdate is not available (not compiled). So I tried Fedora
>> instead.
>> [2] Before systemd 255, the GrowFileSystem flag did not work as expected,
>> but there is a workaround. Hopefully the patches will be backported.
>>
>
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