From eb770a4a207b2e9e3080068c1df22b69ed44d4b5 Mon Sep 17 00:00:00 2001

From: Beniamino Galvani <bgalvani@redhat.com>

Date: Thu, 7 May 2020 07:48:12 +0200

Subject: [PATCH] network-manager: set kernel hostname from the command line

Since commit ff70adf873ef ("initrd: save hostname to a file in /run"),

the initrd generator of NetworkManager parses the hostname from 'ip='

options of the kernel command line and writes it to

/run/NetworkManager/initrd/hostname.

When that file exists, set the kernel hostname.

In presence of multiple hostnames in the command line, the last one

wins. Hostnames from command line always have precedence over ones

received through DHCP. This is a bit different from the legacy network

module that gives higher precedence to the hostname (from DHCP or

command line) of the last interface that is brought up, which depends

on the udev order.

---

 modules.d/35network-manager/nm-run.sh | 4 ++++

 1 file changed, 4 insertions(+)

diff --git a/modules.d/35network-manager/nm-run.sh b/modules.d/35network-manager/nm-run.sh

index fc5280a1..61752384 100755

--- a/modules.d/35network-manager/nm-run.sh

+++ b/modules.d/35network-manager/nm-run.sh

@@ -10,6 +10,10 @@ for i in /usr/lib/NetworkManager/system-connections/* \

   else

       /usr/sbin/NetworkManager --configure-and-quit=initrd --no-daemon

   fi

+

+  if [ -s /run/NetworkManager/initrd/hostname ]; then

+      cat /run/NetworkManager/initrd/hostname > /proc/sys/kernel/hostname

+  fi

   break

 done