Public bug reported:
Network manager gets NTP servers from DHCP but do not update timesyncd to use
it which keeps using ntp.ubuntu.com.
This is a problem on private networks which do not have access to public
internet. On this type of network the configuration of timesyncd must be
updated manually instead of inheriting the conf from the dhcp servers.
This can be integrated with a NM dispatcher script such as below:
etc/NetworkManager/dispatcher.d/10-update-timesyncd for example:
==8<=====8<=====8<=====8<=====8<==
#! /usr/bin/bash
[ -n "$CONNECTION_UUID" ] || exit
INTERFACE=$1
ACTION=$2
case $ACTION in
up | dhcp4-change | dhcp6-change)
[ -n "$DHCP4_NTP_SERVERS" ] || exit
mkdir -p /etc/systemd/timesyncd.conf.d/
cat<<EOF > /etc/systemd/timesyncd.conf.d/$CONNECTION_UUID.conf
[Time]
NTP=$DHCP4_NTP_SERVERS
RootDistanceMaxSec=15
EOF
systemctl restart systemd-timesyncd
;;
down)
rm -f /etc/systemd/timesyncd.conf.d/$CONNECTION_UUID.conf
systemctl restart systemd-timesyncd
;;
esac
==8<=====8<=====8<=====8<=====8<==
ProblemType: Bug
DistroRelease: Ubuntu 21.10
Package: network-manager 1.30.0-1ubuntu3
ProcVersionSignature: Ubuntu 5.11.0-18.19+21.10.1-generic 5.11.17
Uname: Linux 5.11.0-18-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu67
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Mon Jun 28 14:08:52 2021
InstallationDate: Installed on 2020-05-31 (393 days ago)
InstallationMedia: Ubuntu 20.10 "Groovy Gorilla" - Alpha amd64 (20200527)
RebootRequiredPkgs:
linux-image-5.11.0-20-generic
linux-base
SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)
nmcli-nm:
RUNNING VERSION STATE STARTUP CONNECTIVITY NETWORKING WIFI-HW WIFI
WWAN-HW WWAN
running 1.30.0 connected started full enabled enabled
disabled enabled enabled
** Affects: network-manager (Ubuntu)
Importance: High
Status: New
** Tags: amd64 apport-bug impish
** Changed in: network-manager (Ubuntu)
Importance: Undecided => High
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https://bugs.launchpad.net/bugs/1933828
Title:
NTP servers from DCHP are not propagated to timesyncd
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