iptables is deprecated and broken on rhel10+ so use nftables by default

[upodroid]

iptables is deprecated and broken on rocky linux 10

Dec 02 06:18:34.339615 control-plane-us-west2-a-cd4w nodeup[4403]: W1202 06:18:34.339572    4403 executor.go:141] error running task "Package/iptables" (3m19s remaining to succeed): error installing package "iptables": exit status 1: Last metadata expiration check: 0:06:23 ago on Tue 02 Dec 2025 06:12:11 AM UTC.
Dec 02 06:18:34.339615 control-plane-us-west2-a-cd4w nodeup[4403]: Package iptables-nft-1.8.11-9.el10_0.x86_64 is already installed.
Dec 02 06:18:34.339615 control-plane-us-west2-a-cd4w nodeup[4403]: Error:
Dec 02 06:18:34.339615 control-plane-us-west2-a-cd4w nodeup[4403]:  Problem: package iptables-nft-1.8.11-11.el10.x86_64 from appstream requires kernel-modules-extra-matched, but none of the providers can be installed
Dec 02 06:18:34.339615 control-plane-us-west2-a-cd4w nodeup[4403]:   - cannot install the best candidate for the job
Dec 02 06:18:34.339615 control-plane-us-west2-a-cd4w nodeup[4403]:   - package kernel-modules-extra-matched-6.12.0-124.13.1.el10_1.x86_64 from baseos is filtered out by exclude filtering
Dec 02 06:18:34.339615 control-plane-us-west2-a-cd4w nodeup[4403]:   - package kernel-modules-extra-matched-6.12.0-124.8.1.el10_1.x86_64 from baseos is filtered out by exclude filtering
Dec 02 06:18:34.339615 control-plane-us-west2-a-cd4w nodeup[4403]: (try to add '--skip-broken' to skip uninstallable packages or '--nobest' to use not only best candidate packages)

[upodroid]

/test pull-kops-gce-distro-rocky10

[k8s-ci-robot]

@upodroid: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-kops-gce-distro-fedora43	e9d33ac	link	unknown	/test pull-kops-gce-distro-fedora43

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[rifelpet]

the fedora43 job is failing because of swap:

https://storage.googleapis.com/kubernetes-ci-logs/pr-logs/pull/kops/17789/pull-kops-gce-distro-fedora43/1995919812953378816/artifacts/34.102.85.178/journal.log

Dec 02 18:44:14.063347 control-plane-us-west2-c-9q9q kubelet[6236]: I1202 18:44:14.063316    6236 swap_util.go:115] "Swap is on" /proc/swaps contents=<
Dec 02 18:44:14.063347 control-plane-us-west2-c-9q9q kubelet[6236]:         Filename                                Type                Size                Used                Priority
Dec 02 18:44:14.063347 control-plane-us-west2-c-9q9q kubelet[6236]:         /dev/zram0                              partition        8116220                4                100
Dec 02 18:44:14.063347 control-plane-us-west2-c-9q9q kubelet[6236]:  >
Dec 02 18:44:14.063592 control-plane-us-west2-c-9q9q kubelet[6236]: E1202 18:44:14.063355    6236 run.go:72] "command failed" err="failed to run Kubelet: running with swap on is not supported, please disable swap or set --fail-swap-on flag to false"
Dec 02 18:44:14.069692 control-plane-us-west2-c-9q9q systemd[1]: kubelet.service: Main process exited, code=exited, status=1/FAILURE

[upodroid]

We can ignore the failure, fedora has other issues too

/skip

[upodroid]

/skip pull-kops-gce-distro-fedora43

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: rifelpet

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/retest-required

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[hakman]

/override pull-kops-gce-distro-fedora43

[k8s-ci-robot]

@hakman: Overrode contexts on behalf of hakman: pull-kops-gce-distro-fedora43

In response to this:

/override pull-kops-gce-distro-fedora43

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