Minimal example of using OSTree

[Vasilis <andz torproject org>]

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Hello OSTree list,

I 'm going through a test-run of OSTree to check if it could be used
for performing over the air updates in Lepidopter
(https://github.com/TheTorProject/lepidopter) a Debian Raspberry Pi imag
e.

I find a plethora of documentation about rpm-ostree that seems to be
useful only in RPM based systems. However and from what I read in the
docs OSTree is not bound to a package system.

According to the documentation it seems that one can to commit an
image tarball to the OSTree's build repository [1]. An OSTree client
can fetch changes that will be applied to the newest filesystem-set of
"deployments" that will be the default filesystem upon the next
successful boot. In case of failure OSTree client will fall back to
the last known working "filesystem-set".

To sum up the "deployment" process:
* Commit the updated image tarball on the OSTree repository
* Trigger an update/upgrade on the host side
* Trigger a system restart on the host side for the filesystem-set to
take effect

Does this makes sense in an OSTree "deployment" or does it requires
any additional components or processes?


Cheers,
Vasilis

[1]
https://ostree.readthedocs.io/en/latest/manual/buildsystem-and-repos/#wr
iting-your-own-ostree-buildsystem

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