Dne 02. 07. 24 v 13:49 Neal Becker
napsal(a):
On Tue, Jul 2, 2024 at 5:59 AM Vít Ondruch <vondruch@xxxxxxxxxx> wrote:
Dne 01. 07. 24 v 22:58 Aoife Moloney napsal(a):
> Wiki - https://fedoraproject.org/wiki/Changes/UnprivilegedSystemFlatpakManagement
> Discussion thread -
> https://discussion.fedoraproject.org/t/f42-change-proposal-unprivileged-management-of-system-flatpaks-system-wide/124336
>
> This is a proposed Change for Fedora Linux.
> This document represents a proposed Change. As part of the Changes
> process, proposals are publicly announced in order to receive
> community feedback. This proposal will only be implemented if approved
> by the Fedora Engineering Steering Committee.
>
> == Summary ==
> This proposal adds a new dedicated `flatpak` group, allowing users to
> manage system Flatpaks without needing to be in the `wheel` group.
>
> == Owner ==
> * Name: [[User:boredsquirrel| Henning]]
> * Email: boredsquirrel@xxxxxxxxxxxxxxxxxx
>
>
> == Detailed Description ==
> Currently, to install, uninstall and modify apps or repositories,
> users need to be in the `wheel` group. Removing a user from the wheel
> group would interfere with the currently default (systemwide)
> configuration of Flatpaks.
>
> All users can add a `user` repository, and manage their own user
> Flatpaks. But a dedicated group to manage system flatpaks, without
> relying on `wheel` allows more fine grained privileges.
I am not Flatpak user, but I wonder why Flatpaks are system wide
installed by default? And if it would not be better to make them user
installed instead of this proposal.
Vít
> This enables an "admin" permission that is not tied to full root
> access on the host system.
>
> It will be a change of the polkit rule `org.freedesktop.Flatpak.rules`
> like following:
>
>
> polkit.addRule(function(action, subject) {
> if ((action.id == "org.freedesktop.Flatpak.app-install" ||
> action.id == "org.freedesktop.Flatpak.runtime-install"||
> action.id == "org.freedesktop.Flatpak.app-uninstall" ||
> action.id == "org.freedesktop.Flatpak.runtime-uninstall" ||
> action.id == "org.freedesktop.Flatpak.modify-repo") &&
> subject.active == true && subject.local == true && (
> subject.isInGroup("wheel") || subject.isInGroup("flatpak"))) {
> return polkit.Result.YES;
> }
>
> return polkit.Result.NOT_HANDLED;
> });
>
> polkit.addRule(function(action, subject) {
> if (action.id == "org.freedesktop.Flatpak.override-parental-controls") {
> return polkit.Result.AUTH_ADMIN;
> }
>
> return polkit.Result.NOT_HANDLED;
> });
>
>
> == Feedback ==
> none yet
>
> == Benefit to Fedora ==
> This is a step towards the Confined Users goal. It enables a dedicated
> action, the management of Flatpaks, without needing all the other
> privileges that `wheel` users have.
>
> == Scope ==
> * Proposal owners: changing a single rule, testing with nonwheel users
> in the `flatpak` group
>
> * Other developers: none
>
> * Release engineering: [https://pagure.io/releng/issues #Releng issue number]
>
> * Policies and guidelines: Documentation needs to get an additional
> chapter on Flatpak management with the `flatpak` group.
>
> * Trademark approval: N/A (not needed for this Change)
>
> * Alignment with the Fedora Strategy: Yes
>
>
> == Upgrade/compatibility impact ==
> The polkit rule will be overwritten, there will be no changes in
> behavior. It just enables a new feature.
>
> == How To Test ==
> On Atomic or traditional Fedora, place the above rule in
> `/etc/polkit-1/rules.d/org.freedesktop.Flatpak.rules`.
>
> This will be preferred over the default rule and you can test if it works.
>
> == User Experience ==
> By default, Anaconda puts users into the `wheel` group. There will be no change.
>
> But it enables to manage Flatpaks without being in that privileged group.
>
> == Dependencies ==
> None
>
>
> == Contingency Plan ==
>
> * Contingency mechanism: this is a simple fix, not adding it will keep
> the previous wheel need
> * Contingency deadline: N/A
> * Blocks release? N/A
>
>
> == Documentation ==
> Will be added afterwards.
>
> Nonwheel users can be added to the `flatpak` group:
>
>
> sudo groupadd flatpak
> sudo usermod -aG flatpak USERNAME
>
>
>
> == Release Notes ==
>
> Permission to manage systemwide flatpaks is now granted to users in
> the 'flatpak' group.
Currently wheel is required in order to install packages with dnf/rpm. Why should flatpak be different?
Because Flatpak can do that it seems.
But mainly, for single user computer, it does not really matter,
the application can be installed in user profile and it won't need
any elevated privileges. For multi user computer, why the apps
installed by one user should influence other users? Of course
there might be system administrator who might install those system
wide.
But I also see other benefits. E.g. for user computers, if home is on separate partition, there might be more space then on the system partition. In my experience, the Flatpak runtimes might consume quite some space.
Vít
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