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kdumpctl: check and generate /etc/vconsole.conf

Browse Source 
Resolves: https://issues.redhat.com/browse/RHEL-79413
Upstream: kdump-utils
Conflict: Yes, upstream use has_command to check if a command is
          avaiable but that function is not backported to RHEL-9.

commit f758448cc7f29a24d8f5ddd7418dc9dd2fc3fd35
Author: Lichen Liu <llc123456a@gmail.com>
Date:   Thu May 8 17:22:17 2025 +0800

    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>

Signed-off-by: Lichen Liu <lichliu@redhat.com>
This commit is contained in:
Lichen Liu 2025-06-06 10:56:47 +08:00
parent ae92bdc7f6
commit 585fd33d40
1 changed files with 14 additions and 0 deletions
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14
kdumpctl
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@ -143,6 +143,18 @@ rebuild_kdump_initrd()
return 0 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 [[ -x "$(command -v localectl)" ]] ; then
if localectl list-keymaps | grep -q "^us$"; then
localectl set-keymap us 2>/dev/null
fi
fi
fi
}
rebuild_initrd() rebuild_initrd()
{ {
local _ret local _ret
@ -152,6 +164,8 @@ rebuild_initrd()
return 1 return 1
fi fi
check_and_generate_vconsole_conf
if [[ $DEFAULT_DUMP_MODE == "fadump" ]]; then if [[ $DEFAULT_DUMP_MODE == "fadump" ]]; then
rebuild_fadump_initrd rebuild_fadump_initrd
else else