get.docker.com/rootless aborts when ip_tables/ip6_tables aren't loaded.
Ubuntu 24.04 and 26.04 ship both modules but don't autoload them on a
fresh box, so rootless setup died there — and because the caller captures
its output into $result, the reason never reached the console or the
error report. The install continued, reported success, and printed
credentials for a WebUI that was never running.
initPrerequires now modprobes both modules and persists them to
/etc/modules-load.d/libreportal-rootless.conf for subsequent boots,
failing with an actionable message when the kernel genuinely lacks them
(container/VM kernels without netfilter).
installDockerRootless gets its own guard, since it also runs outside
init.sh via start_docker / rootless_start_setup. It only attempts
modprobe when it can — the de-sudoed manager has no modprobe in the
LP_SYSTEM allowlist, matching how ubuntu.sh handles sudo-apt — and
returns non-zero rather than proceeding into a failure whose message
would be swallowed. Already-loaded modules are a clean no-op, so the
normal post-install re-run path is unaffected.
Uninstall removes the drop-in alongside the sysctl ones, and it's listed
in the footprint summary.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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