Switch ntpd to systemd-timesyncd

etc/ntpd-time.conf

@@ -0,0 +1,22 @@
+# Note: This is only for time.molgen.mpg.de@wtf
+
+interface ignore wildcard
+interface listen 141.14.16.215 # time.molgen.mpg.de
+interface listen 127.0.0.1 # for ntpq
+
+server ntps1.gwdg.de iburst
+server ntps2.gwdg.de iburst
+server ntps3.gwdg.de iburst
+server ntps4.gwdg.de iburst
+server zeit.fu-berlin.de iburst
+server ntps1-0.cs.tu-berlin.de iburst
+server ptbtime1.ptb.de iburst
+server ptbtime2.ptb.de iburst
+server ptbtime3.ptb.de iburst
+server 0.de.pool.ntp.org iburst
+server 1.de.pool.ntp.org iburst
+
+driftfile /var/cache/ntp.drift
+
+restrict default nomodify noquery notrap nopeer
+restrict 127.0.0.1

etc/systemd/system/ntp-clock-stamp.service

@@ -0,0 +1,13 @@
+[Unit]
+ConditionHost=wtf.molgen.mpg.de
+After=ntpd-time.service
+BindsTo=ntpd-time.service
+
+[Service]
+Type=exec
+ExecStartPre=/usr/bin/mkdir -p /var/lib/systemd/timesync
+ExecStart=/bin/bash -c 'while true; do out=$(ntpq -c "rv 0 leap" 2>/dev/null); [[ $out =~ leap=(00|01|10) ]] && touch /var/lib/systemd/timesync/clock; sleep 60; done'
+Restart=on-failure
+
+[Install]
+WantedBy=multi-user.target

etc/systemd/system/ntpd-time.service

@@ -0,0 +1,18 @@
+[Unit]
+ConditionHost=wtf.molgen.mpg.de
+DefaultDependencies=no
+After=systemd-sysusers.service
+Before=time-set.target sysinit.target shutdown.target
+Conflicts=shutdown.target
+Wants=time-set.target
+
+[Service]
+ExecStart=/usr/bin/ntpd -n -g -c /etc/ntpd-time.conf
+Restart=always
+
+# ntpd logs to syslog, stdout/stderr is redundant
+StandardOutput=null
+StandardError=null
+
+[Install]
+WantedBy=basic.target

etc/systemd/system/systemd-timesyncd.service.d/not-on-wtf.conf

@@ -0,0 +1,6 @@
+# Don't start systemd-timesyncd on wtf, because on this host we start
+# ntpd-time.service which regulates the kernel real time clock.
+
+[Unit]
+
+ConditionHost=!wtf.molgen.mpg.de

etc/systemd/timesyncd.conf.d/local.conf

@@ -0,0 +1,7 @@
+[Time]
+
+# several fallbacks. systemd-timesyncd will use the first responding server and stick
+# to it as long as it is reachable or until restarted.
+# test remote with `ntpdate -q SERVER` (no change of local time)
+
+NTP=time.molgen.mpg.de ntps1.gwdg.de ntps2.gwdg.de ntps3.gwdg.de ntps4.gwdg.de zeit.fu-berlin.de ntps1-0.cs.tu-berlin.de ptbtime1.ptb.de ptbtime2.ptb.de ptbtime3.ptb.de 0.de.pool.ntp.org 1.de.pool.ntp.org