ci: Drop explicit "connection:" for provisioning

[martinpitt]

This forces having to have a system libvirt instance, but that is incompatible with running tests inside of containers/toolbox. It also seems unnecessary: session libvirt networking and the tests work just fine.

Drop the explicit setting and let tmt/testcloud pick its internal default (which is qemu:///session). This wasn't relevant for running on Testing Farm anyway.

Enhancement: tmt tests can now be run locally out of a container or toolbox.

Reason: Requiring a system libvirtd instance is an unnecessary requirement (e.g. my laptop doesn't have libvirtd installed at all, I run everything in toolbox). tmt defaults to qemu:///session for this reason, which is much more flexible and safer, and less demanding.

Result:

Issue Tracker Tickets (Jira or BZ if any): -

tmt run --until report provision --how virtual --image fedora-42 succeeds for me now. It previously failed with

libvirt: XML-RPC error : Failed to connect socket to '/var/run/libvirt/virtqemud-sock': No such file or directory

Being able to run tmt locally is quite important for me, especially as tmt tests don't run by default in PRs -- they need to be explicitly requested by project maintainers. I am not one, and it's actually useful to be in that state for a while to ensure that the experience for external contributors is good enough.

[spetrosi]

lgtm, we need to remove this from https://github.com/linux-system-roles/.github/blob/main/playbooks/templates/plans/test_playbooks_parallel.fmf - automation builds this file from there

[spetrosi]

[citest]

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

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Additional details and impacted files

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  Files           ?        1           
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  Hits            ?      181           
  Misses          ?      165           
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[martinpitt]

Thanks @spetrosi for the pointer! I'll submit a PR there, but good to see a full test run here. Just for avoidance of doubt, these are the workflow and also the tmt tests, right? I see they aren't triggered via packit, but via a custom workflow (note: you can trigger packit tests manually as well).

[martinpitt]

Sent to linux-system-roles/.github#91

[martinpitt]

Reopening as per @spetrosi 's suggestion in Chat. Sorry for the misunderstanding, I thought the PR would only go to the .github repo.