tests: add reboot check to ignition.kargs.basic

This will further sanity check the karg persists even to subsequent
boots.

Author: dustymabe

tests/kola/ignition/kargs/basic/test.sh

@@ -6,10 +6,25 @@ set -xeuo pipefail
 
 . $KOLA_EXT_DATA/commonlib.sh
 
-if ! grep foobar /proc/cmdline; then
-    fatal "missing foobar in kernel cmdline"
-fi
-if grep mitigations /proc/cmdline; then
-    fatal "found mitigations in kernel cmdline"
-fi
+kargchecks() {
+    if ! grep foobar /proc/cmdline; then
+        fatal "missing foobar in kernel cmdline"
+    fi
+    if grep mitigations /proc/cmdline; then
+        fatal "found mitigations in kernel cmdline"
+    fi
+}
+
+case "${AUTOPKGTEST_REBOOT_MARK:-}" in
+  "")
+      kargchecks
+      # Now reboot the machine and verify the kernel argument persists
+      /tmp/autopkgtest-reboot nextboot
+      ;;
+  nextboot)
+      kargchecks
+      ;;
+  *) fatal "unexpected mark: ${AUTOPKGTEST_REBOOT_MARK}";;
+esac
+
 ok "Ignition kargs"