From 1e9167d949638237b89c2a2484c15b4ad36ca111 Mon Sep 17 00:00:00 2001
From: Michele Baldessari <michele@acksyn.org>
Date: Thu, 2 Apr 2020 22:21:43 +0200
Subject: [PATCH] Allow to customize the undercloud's grub options

This is useful if you want to add things like net.ifnames=0 (to make
sure your undercloud has eth* named nics) or
mitigations=off for that extra performance.

Tested by adding:
undercloud_extra_grub_params: net.ifnames=0 mitigations=off

And observing the following on the undercloud:
(undercloud) [stack@undercloud ~]$ cat /proc/cmdline
console=ttyS0 root=/dev/vda net.ifnames=0 mitigations=off

Change-Id: Ie814765897699705a2826ed1a8c8d8f85d579028
---
 roles/libvirt/setup/undercloud/templates/undercloudvm.xml.j2 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/roles/libvirt/setup/undercloud/templates/undercloudvm.xml.j2 b/roles/libvirt/setup/undercloud/templates/undercloudvm.xml.j2
index f51aa70d2..675d3df8d 100644
--- a/roles/libvirt/setup/undercloud/templates/undercloudvm.xml.j2
+++ b/roles/libvirt/setup/undercloud/templates/undercloudvm.xml.j2
@@ -17,7 +17,7 @@
 {% if overcloud_as_undercloud|bool or undercloud_use_custom_boot_images|bool %}
     <kernel>{{ undercloud_custom_vmlinuz }}</kernel>
     <initrd>{{ undercloud_custom_initrd }}</initrd>
-    <cmdline>console=ttyS0 root=/dev/vda</cmdline>
+    <cmdline>console=ttyS0 root=/dev/vda {{ undercloud_extra_grub_params|default('') }}</cmdline>
 {% endif %}
   </os>
   <features>