4～5年程度運営してきたラズベリーパイでは、毎時間cronジョブを実行して時間を設定します。私はPiが長く走るにつれて時間が漂流する可能性が高いことを経験から知っているので、Piをリセットするスクリプトを見つけました。何年もうまくいきましたが、突然動作が停止しました。 ntp.conf はここにあります:
# /etc/ntp.conf, configuration for ntpd; see ntp.conf(5) for help
driftfile /var/lib/ntp/ntp.drift
# Enable this if you want statistics to be logged.
#statsdir /var/log/ntpstats/
statistics loopstats peerstats clockstats
filegen loopstats file loopstats type day enable
filegen peerstats file peerstats type day enable
filegen clockstats file clockstats type day enable
# You do need to talk to an NTP server or two (or three).
#server ntp.your-provider.example
# pool.ntp.org maps to about 1000 low-stratum NTP servers. Your server will
# pick a different set every time it starts up. Please consider joining the
# pool: <http://www.pool.ntp.org/join.html>
server 0.uk.pool.ntp.org iburst
server 1.uk.pool.ntp.org iburst
server 2.uk.pool.ntp.org iburst
server 3.uk.pool.ntp.org iburst
# Access control configuration; see /usr/share/doc/ntp-doc/html/accopt.html for
# details. The web page <http://support.ntp.org/bin/view/Support/AccessRestrictions>
# might also be helpful.
#
# Note that "restrict" applies to both servers and clients, so a configuration
# that might be intended to block requests from certain clients could also end
# up blocking replies from your own upstream servers.
# By default, exchange time with everybody, but don't allow configuration.
restrict -4 default kod notrap nomodify nopeer noquery
restrict -6 default kod notrap nomodify nopeer noquery
# Local users may interrogate the ntp server more closely.
#restrict 127.0.0.1
#restrict ::1
# Clients from this (example!) subnet have unlimited access, but only if
# cryptographically authenticated.
#restrict 192.168.123.0 mask 255.255.255.0 notrust
# If you want to provide time to your local subnet, change the next line.
# (Again, the address is an example only.)
#broadcast 192.168.123.255
# If you want to listen to time broadcasts on your local subnet, de-comment the
# next lines. Please do this only if you trust everybody on the network!
#disable auth
#broadcastclient
私のcronジョブは次のスクリプトを実行します。
#! /bin/bash
/etc/init.d/ntp stop
ntpd -q -g
/etc/init.d/ntp start
ntp -q -g コマンドを実行すると、次のメッセージセットが表示され、終了しません。
14 Nov 05:43:23 ntpd[1577]: ntpd [email protected] Sat Mar 10 18:03:33 UTC 2018(1): Starting
14 Nov 05:43:23 ntpd[1577]: Command line: ntpd -q -g
14 Nov 05:43:23 ntpd[1577]: proto: precision = 3.000 usec (-18)
restrict 0.0.0.0: KOD does nothing without LIMITED.
14 Nov 05:43:23 ntpd[1577]: restrict 0.0.0.0: KOD does nothing without LIMITED.
restrict ::: KOD does nothing without LIMITED.
14 Nov 05:43:23 ntpd[1577]: restrict ::: KOD does nothing without LIMITED.
14 Nov 05:43:23 ntpd[1577]: Listen and drop on 0 v6wildcard [::]:123
14 Nov 05:43:23 ntpd[1577]: Listen and drop on 1 v4wildcard 0.0.0.0:123
14 Nov 05:43:23 ntpd[1577]: Listen normally on 2 lo 127.0.0.1:123
14 Nov 05:43:23 ntpd[1577]: Listen normally on 3 eth0 192.168.0.42:123
14 Nov 05:43:23 ntpd[1577]: Listen normally on 4 lo [::1]:123
14 Nov 05:43:23 ntpd[1577]: Listen normally on 5 eth0 [2a02:c7f:9665:6900:ba27:ebff:fe24:90a5]:123
14 Nov 05:43:23 ntpd[1577]: Listen normally on 6 eth0 [fd57:5132:3318:0:ba27:ebff:fe24:90a5]:123
14 Nov 05:43:23 ntpd[1577]: Listen normally on 7 eth0 [fe80::ba27:ebff:fe24:90a5%2]:123
14 Nov 05:43:23 ntpd[1577]: Listening on routing socket on fd #24 for interfaceupdates
どんなアイデアがありますか？ Piクロックをタイムサーバーに同期する最も簡単な方法は何ですか？