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Add detection for ostree-based systems and warn users about losing changes #2053

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merged 1 commit into from
Apr 24, 2024

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dcantrell
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On ostree-based systems, users can use dnf to customize the environment but those changes will be lost at the next ostree-based image update. If you want to retain changes between ostree-updates you need to make use of rpm-ostree right now.

All this patch does is add a function to detect systems managed this way and present warnings before dnf operations that modify the system. I display the warning at the beginning of the output, but maybe that should be after any other output is on the display.

@jan-kolarik jan-kolarik self-assigned this Feb 19, 2024
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I have two proposals regarding the code I've reviewed.

Firstly, as you suggested, I'd go with displaying the warning text to the user during the transaction confirmation, which involves moving the logic before this specific line. This approach eliminates the need to handle individual commands, as it addresses any transactional operation.

Secondly, in util.py, I'd retain only the logic related to detecting container presence. After confirming that is_container returns True, we can relocate the logging of the ostree message to the previously mentioned location. What do you think about that?

@@ -157,6 +158,8 @@ def list_alias(self, cmd):
print(_("Alias %s='%s'") % (cmd, " ".join(args)))

def run(self):
dnf.util.is_container()
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@j-mracek j-mracek Feb 27, 2024

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Do we want to spread the message to all commands including commands from plugins (dnf-plugins-core, extras, third party), or do we want to be selective?

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@dcantrell dcantrell Apr 18, 2024

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I have gone back and forth on this and I think it's mostly wasted effort to be selective right now. I think it's a better idea to do a blanket warning and then shift the focus to incorporating rpm-ostree functionality directly in to native dnf (or a dnf core plugin) where appropriate and then eventually we can just drop this change. I view this change as a temporary thing just to make it nicer for users.

@dcantrell
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I have two proposals regarding the code I've reviewed.

Firstly, as you suggested, I'd go with displaying the warning text to the user during the transaction confirmation, which involves moving the logic before this specific line. This approach eliminates the need to handle individual commands, as it addresses any transactional operation.

Secondly, in util.py, I'd retain only the logic related to detecting container presence. After confirming that is_container returns True, we can relocate the logging of the ostree message to the previously mentioned location. What do you think about that?

I like these suggestions, thanks! I will get the PR updated. I've also got an additional method for reliably detecting an ostree system, so I'm going to try to rework is_container() a bit too.

…anges

On ostree-based systems, users can use dnf to customize the
environment but those changes will be lost at the next ostree-based
image update.  If you want to retain changes between ostree-updates
you need to make use of rpm-ostree right now.

Signed-off-by: David Cantrell <dcantrell@redhat.com>
@jan-kolarik
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LGTM, thanks!

@jan-kolarik jan-kolarik merged commit 5c050ba into rpm-software-management:master Apr 24, 2024
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@cgwalters
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xref https://issues.redhat.com/browse/SWM-1313 related to this

@travier
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travier commented Jul 11, 2024

This should test for /run/ostree-booted instead and only that. bootc or rpm-ostree being installed on the system does not mean that we are using a Image Based system.

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5 participants