kdumpctl: check and generate /etc/vconsole.conf

Resolves: RHEL-91468
Upstream: kdump-utils
Conflict: None

Signed-off-by: Lichen Liu <lichliu@redhat.com>

0001-kdumpctl-check-and-generate-etc-vconsole.conf.patch

@@ -0,0 +1,66 @@
+From f758448cc7f29a24d8f5ddd7418dc9dd2fc3fd35 Mon Sep 17 00:00:00 2001
+From: Lichen Liu <llc123456a@gmail.com>
+Date: Thu, 8 May 2025 17:22:17 +0800
+Subject: [PATCH] kdumpctl: check and generate /etc/vconsole.conf
+
+For VMs created from KVM Guest images, /etc/vconsole.conf is missing
+so that dracut module 10i18n will install all kbd files.
+
+```
+  # du -sh initramfs/squash/usr/lib/kbd/*
+  438K    initramfs/squash/usr/lib/kbd/consolefonts
+  340K    initramfs/squash/usr/lib/kbd/consoletrans
+  2.1M    initramfs/squash/usr/lib/kbd/keymaps
+  232K    initramfs/squash/usr/lib/kbd/unimaps
+```
+
+From man 5 vconsole.conf, KEYMAP= defaults to "us" if not set. We can
+safely generate a /etc/vconsole.conf with KEYMAP=us by localectl to
+reduce the initramfs size.
+
+```
+  # du -sh initramfs/squash/usr/lib/kbd/*
+  11K     initramfs/squash/usr/lib/kbd/consolefonts
+  121K    initramfs/squash/usr/lib/kbd/keymaps
+```
+
+Signed-off-by: Lichen Liu <lichliu@redhat.com>
+---
+ kdumpctl | 14 ++++++++++++++
+ 1 file changed, 14 insertions(+)
+
+diff --git a/kdumpctl b/kdumpctl
+index 58de8e6..ae541a3 100755
+--- a/kdumpctl
++++ b/kdumpctl
+@@ -174,6 +174,18 @@ rebuild_kdump_initrd()
+ 	return 0
+ }
+ 
++check_and_generate_vconsole_conf()
++{
++	if [[ ! -e /etc/vconsole.conf  ]]; then
++		dwarn "/etc/vconsole.conf does not exist, trying to set keymap to us to reduce the initramfs size."
++		if has_command localectl; then
++			if localectl list-keymaps | grep -q "^us$"; then
++				localectl set-keymap us 2>/dev/null
++			fi
++		fi
++	fi
++}
++
+ rebuild_initrd()
+ {
+ 	local _ret
+@@ -185,6 +197,8 @@ rebuild_initrd()
+ 		return 1
+ 	fi
+ 
++	check_and_generate_vconsole_conf
++
+ 	if [[ $DEFAULT_DUMP_MODE == "fadump" ]]; then
+ 		rebuild_fadump_initrd
+ 	else
+-- 
+2.47.0
+

kdump-utils.spec

@@ -8,6 +8,7 @@ Summary: Kernel crash dump collection utilities
 License: GPL-2.0-only
 URL: https://github.com/rhkdump/kdump-utils
 Source0: https://github.com/rhkdump/kdump-utils/archive/v%{version}/%{name}-%{version}.tar.gz
+Patch01: 0001-kdumpctl-check-and-generate-etc-vconsole.conf.patch
 
 %ifarch ppc64 ppc64le
 Requires(post): servicelog