当ntpd.conf中有本地ntpd服务器引用时，如何更新机器时间？

Question

我的FreeIPA服务器的日期时间漂移了大约10分钟，导致登录失败。ntpd服务正在启动和运行。我检查了配置，并注意到freeIPA添加了一个本地服务器来同步ntpd.conf文件中的时间。

这就是ntpd.conf中FreeIPA添加的内容：

### Added by IPA Installer ###
server 127.127.1.0 iburst
fudge 127.127.1.0 stratum 10

我也有标准的百人池。

# Use public servers from the pool.ntp.org project.
# Please consider joining the pool (http://www.pool.ntp.org/join.html).
server 0.centos.pool.ntp.org iburst
server 1.centos.pool.ntp.org iburst
server 2.centos.pool.ntp.org iburst
server 3.centos.pool.ntp.org iburst

但是，ntpd服务不会使用公共ntp池，也不会纠正漂移，因为它查看本地ntpd服务器。

使用FreeIPA添加的行，当我试图强制ntpd更新其时间时，这就是我得到的：

service ntpd stop
ntpd -gq
ntpd: time slew +0.000000s
service ntpd start

删除由ntpd.conf添加到FreeIPA的行可以使更新正常工作：

 service ntpd stop
 ntpd -gq
 ntpd: time set -543.065651s
 service ntpd start

所以我的问题是：

1. 如何使ntpd正确使用外部ntpd时钟？
2. FreeIPA似乎也对我的客户机进行了这些更改(它将ntp服务器指向我的ipa服务器，然后设置本地ntpd服务器)。这也导致没有一个客户端进行适当的更新，我将如何正确地修复这个问题？
3. 这些添加的本地服务器配置是否可以被删除？看来这只是多年前的事了吗？https://www.redhat.com/archives/freeipa-users/2013-February/msg00260.html

完全配置：

# For more information about this file, see the man pages
# ntp.conf(5), ntp_acc(5), ntp_auth(5), ntp_clock(5), ntp_misc(5), ntp_mon(5).

driftfile /var/lib/ntp/drift

# Permit time synchronization with our time source, but do not
# permit the source to query or modify the service on this system.
restrict default nomodify notrap nopeer noquery

# Permit all access over the loopback interface.  This could
# be tightened as well, but to do so would effect some of
# the administrative functions.
restrict 127.0.0.1
restrict ::1

# Hosts on local network are less restricted.
#restrict 192.168.1.0 mask 255.255.255.0 nomodify notrap

# Use public servers from the pool.ntp.org project.
# Please consider joining the pool (http://www.pool.ntp.org/join.html).
server 0.centos.pool.ntp.org iburst
server 1.centos.pool.ntp.org iburst
server 2.centos.pool.ntp.org iburst
server 3.centos.pool.ntp.org iburst

#broadcast 192.168.1.255 autokey        # broadcast server
#broadcastclient                        # broadcast client
#broadcast 224.0.1.1 autokey            # multicast server
#multicastclient 224.0.1.1              # multicast client
#manycastserver 239.255.254.254         # manycast server
#manycastclient 239.255.254.254 autokey # manycast client

# Enable public key cryptography.
#crypto

includefile /etc/ntp/crypto/pw

# Key file containing the keys and key identifiers used when operating
# with symmetric key cryptography.
keys /etc/ntp/keys

# Specify the key identifiers which are trusted.
#trustedkey 4 8 42

# Specify the key identifier to use with the ntpdc utility.
#requestkey 8

# Specify the key identifier to use with the ntpq utility.
#controlkey 8

# Enable writing of statistics records.
#statistics clockstats cryptostats loopstats peerstats

# Disable the monitoring facility to prevent amplification attacks using ntpdc
# monlist command when default restrict does not include the noquery flag. See
# CVE-2013-5211 for more details.
# Note: Monitoring will not be disabled with the limited restriction flag.
disable monitor

### Added by IPA Installer ###

### Added by IPA Installer ###

### Added by IPA Installer ###
server 127.127.1.0 iburst
fudge 127.127.1.0 stratum 10

Answer 1

有了10块软糖，它真的不应该选择当地的时钟。

您可以尝试使用服务器池之一的prefer选项来强制它选择internet时间源：

server 0.centos.pool.ntp.org iburst prefer

在进行更改并重新启动服务之后，在运行ntpq -pn查询服务状态时，应该会在首选池旁边看到星号(*)。