centos7安装chronyd服务方式

centos7安装chronyd服务

一、双节点部署:

ip主机名192.168.100.10controller192.168.100.20compute

二、配置时间同步

1、双节点安装chrony服务（这里是使用本地的软件包进行yum安装）

[root@controller ~]# yum install -y chrony
[root@compute ~]# yum install -y chrony

2、controller修改chrony服务配置文件（在/etc/chrony.conf目录下）

[root@controller ~]# vi /etc/chrony.conf
# 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 //添加#号
#server 1.centos.pool.ntp.org iburst //添加#号
#server 2.centos.pool.ntp.org iburst //添加#号
#server 3.centos.pool.ntp.org iburst //添加#号
server controller iburst //添加这一行
# Record the rate at which the system clock gains/losses time.
driftfile /var/lib/chrony/drift
# Allow the system clock to be stepped in the first three updates
# if its offset is larger than 1 second.
makestep 1.0 3
# Enable kernel synchronization of the real-time clock (RTC).
rtcsync
# Enable hardware timestamping on all interfaces that support it.
#hwtimestamp *
# Increase the minimum number of selectable sources required to adjust
# the system clock.
#minsources 2
# Allow NTP client access from local network.
allow all //去掉#号
# Serve time even if not synchronized to a time source.
local stratum 10 //去掉#号
# Specify file containing keys for NTP authentication.
#keyfile /etc/chrony.keys
# Specify directory for log files.
logdir /var/log/chrony
# Select which information is logged.
#log measurements statistics tracking

3、compute 修改chrony配置文件

[root@compute ~]# vi /etc/chrony.conf
# 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
server 192.168.100.10 iburst //添加这一行
# Record the rate at which the system clock gains/losses time.
driftfile /var/lib/chrony/drift
# Allow the system clock to be stepped in the first three updates
# if its offset is larger than 1 second.
makestep 1.0 3
# Enable kernel synchronization of the real-time clock (RTC).
rtcsync
# Enable hardware timestamping on all interfaces that support it.
#hwtimestamp *
# Increase the minimum number of selectable sources required to adjust
# the system clock.
#minsources 2
# Allow NTP client access from local network.
#allow 192.168.0.0/16
# Serve time even if not synchronized to a time source.
#local stratum 10
# Specify file containing keys for NTP authentication.
#keyfile /etc/chrony.keys
# Specify directory for log files.
logdir /var/log/chrony
# Select which information is logged.
#log measurements statistics tracking

4、双节点重启服务，并设置开机自启

[root@controller ~]# systemctl restart chronyd && systemctl enable chronyd
[root@compute ~]# systemctl restart chronyd && systemctl enable chronyd

5、controller开启ntp同步

[root@controller ~]# timedatectl set-ntp true

6、双节点执行chronyc sources命令，结果中存在以^*开头的行，则同步成功

[root@controller ~]# chronyc sources
210 Number of sources = 1
MS Name/IP address Stratum Poll Reach LastRx Last sample
===============================================================================
^* controller 10 6 377 27 +186ns[-8404ns] +/- 17us
[root@compute ~]# chronyc sources
210 Number of sources = 1
MS Name/IP address Stratum Poll Reach LastRx Last sample
===============================================================================
^* controller 10 6 17 34 -4280ns[ -13us] +/- 328us

Centos7使用chronyd进行时钟同步

最近要做阿里云迁移 IDC 机房，整理下 Linux 运维基线，简单记录，以备后用~

安装

# 默认已经安装
$ yum install -y chrony

配置文件

$ cat /etc/chrony.conf
# Use public servers from the pool.ntp.org project.
# Please consider joining the pool (http://www.pool.ntp.org/join.html).
# 国家服务器
server 0.cn.pool.ntp.org
server 1.cn.pool.ntp.org
server 2.cn.pool.ntp.org
server 3.cn.pool.ntp.org
# 阿里
server ntp.aliyun.com
# 腾讯
server time1.cloud.tencent.com
server time2.cloud.tencent.com
server time3.cloud.tencent.com
server time4.cloud.tencent.com
server time5.cloud.tencent.com
# 苹果
server time.asia.apple.com
# 微软
server time.windows.com
# 其他
server cn.ntp.org.cn
# Record the rate at which the system clock gains/losses time.
driftfile /var/lib/chrony/drift
# Allow the system clock to be stepped in the first three updates
# if its offset is larger than 1 second.
makestep 1.0 3
# Enable kernel synchronization of the real-time clock (RTC).
rtcsync
# Enable hardware timestamping on all interfaces that support it.
#hwtimestamp *
# Increase the minimum number of selectable sources required to adjust
# the system clock.
#minsources 2
# Allow NTP client access from local network.
#allow 192.168.0.0/16
# Serve time even if not synchronized to a time source.
#local stratum 10
# Specify file containing keys for NTP authentication.
#keyfile /etc/chrony.keys
# Specify directory for log files.
logdir /var/log/chrony
# Select which information is logged.
#log measurements statistics tracking

启动服务及时区设置

# 启动服务
$ systemctl start chronyd
# 开机启动
$ systemctl enable chronyd
# 查看当前状态
$ systemctl status chronyd
# 查看亚洲时区
$ timedatectl list-timezones | grep Asia
# 设置时区
$ timedatectl set-timezone Asia/Shanghai

验证服务

# 查看现有的时间服务器
$ chronyc sources -v
# 查看时间服务器状态
$ chronyc sourcestats -v
# 显示时钟同步相关参数
$ chronyc tracking
# 查看当前时区及时间
$ timedatectl

手动同步时间

# 使用 ntpdate 同步时间
$ ntpdate ntp.aliyun.com
# chronyd 未启动时，如下命令同步时间
$ chronyd -q \’server pool.ntp.org iburst\’
# chronyd 启动时，使用如下命令同步时间
$ chronyc -a \’burst 4/4\’ && sleep 10 && chronyc -a makestep

手动设置时间

# date 设置时间
$ date -s \’2021-06-03 19:00:00\’
# 关闭 ntp 同步后，才可以使用 timedatectl 进行时间设置
$ timedatectl set-ntp false
# 设置日期和时间
$ timedatectl set-time \’2021-06-03 19:00:00\’
# 设置日期
$ timedatectl set-time \’2021-06-03\’
# 设置时间
$ timedatectl set-time \’19:00:00\’
# 设置完成后，再开启
$ timedatectl set-ntp true