edns: test passing of global dns configuration to installed system

Related: INSTALLER-4097

bootopts-global-dns.ks.in

@@ -0,0 +1,31 @@
+# The goal is to test options and configuration passing to installed system
+# not the functionality of the name resolution.
+
+# Use defaults, but no network
+%ksappend common/common.ks
+%ksappend repos/default.ks
+%ksappend l10n/default.ks
+%ksappend users/default.ks
+%ksappend storage/default.ks
+%ksappend payload/default_packages.ks
+
+%post
+
+# Check the arguments are passed to the installed system
+grep "^GRUB_CMDLINE_LINUX=" /etc/default/grub | grep "rd.net.dns=tls://8.8.8.8#dns.google"
+if [[ $? -ne 0 ]]; then
+    echo '*** Failed check: rd.net.dns option is missing' >> /root/RESULT
+fi
+grep "^GRUB_CMDLINE_LINUX=" /etc/default/grub | grep "rd.net.dns-global-mode=backup"
+if [[ $? -ne 0 ]]; then
+    echo '*** Failed check: rd.net.dns-global-mode option is missing' >> /root/RESULT
+fi
+
+# Check the NM runtime global config file is passed to the installed system
+if [[ ! -e /etc/NetworkManager/conf.d/16-global-dns.conf ]]; then
+    echo '*** Failed check: NetworkManger global dns configuration file is missing' >> /root/RESULT
+fi
+
+%ksappend validation/success_if_result_empty.ks
+
+%end

bootopts-global-dns.sh

@@ -0,0 +1,29 @@
+#
+# Copyright (C) 2025  Red Hat, Inc.
+#
+# This copyrighted material is made available to anyone wishing to use,
+# modify, copy, or redistribute it subject to the terms and conditions of
+# the GNU General Public License v.2, or (at your option) any later version.
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY expressed or implied, including the implied warranties of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
+# Public License for more details.  You should have received a copy of the
+# GNU General Public License along with this program; if not, write to the
+# Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+# 02110-1301, USA.  Any Red Hat trademarks that are incorporated in the
+# source code or documentation are not subject to the GNU General Public
+# License and may only be used or replicated with the express permission of
+# Red Hat, Inc.
+#
+# Red Hat Author(s): Radek Vykydal <[email protected]>
+
+# Ignore unused variable parsed out by tooling scripts as test tags metadata
+# shellcheck disable=SC2034
+TESTTYPE=${TESTTYPE:-"network"}
+
+. ${KSTESTDIR}/functions.sh
+
+kernel_args() {
+    . ${tmpdir}/ks_url
+    echo ${DEFAULT_BOOTOPTS} rd.net.dns=tls://8.8.8.8\#dns.google rd.net.dns-global-mode=backup ip=${KSTEST_NETDEV1}:dhcp
+}