Linux服务器时间同步配置

时间慢下来 發表於 2019-9-21 17:14:00

<h1 class="artical-title">Linux服务器时间同步配置</h1>
<div class="artical-title-list">
<div class="clear"> </div>
</div>
<div class="artical-content-bak main-content editor-side-new">
<div id="result" class="con editor-preview-side">
以CentOS7 做时间服务器，其他服务器（Centos 6、RHEL7）同步该服务器时间
RHEL 7、CentOS 7 默认的网络时间协议为Chrony
本教程时间服务器服务端主机名：CentOS7-Node3    IP：192.168.231.130
                           客户端1主机名：RHEL7-Node1
                           客户端2主机名：CentOS6-Node2
服务端：
先查询下chrony服务状态
<div class="code-toolbar">
<pre class="brush:bash;toolbar:falselanguage-bash"><code class="language-bash"># systemctl status chronyd
Unit chronyd.service could not be found.</code></pre>
<div class="toolbar"> </div>
</div>
如果查询没有该服务，可yum安装
<div class="code-toolbar">
<pre class="brush:bash;toolbar:falselanguage-bash"><code class="language-bash"># yum install -y chrony </code></pre>
启动chrony服务  
<div class="code-toolbar">
<pre class="brush:bash;toolbar:falselanguage-bash"><code class="language-bash"># systemctl start chronyd</code></pre>
<div class="toolbar"> </div>
</div>
查询状态
<div class="code-toolbar">
<pre class="brush:bash;toolbar:falselanguage-bash"><code class="language-bash"># systemctl status chronyd
● chronyd.service - NTP client/server
Loaded: loaded (/usr/lib/systemd/system/chronyd.service; enabled; vendor preset: enabled)
Active: active (running) since Thu 2018-06-07 10:20:28 CST; 2s ago
Docs: man:chronyd(8)
 man:chrony.conf(5)
Process: 6031 ExecStartPost=/usr/libexec/chrony-helper update-daemon (code=exited, status=0/SUCCESS)
Process: 6027 ExecStart=/usr/sbin/chronyd $OPTIONS (code=exited, status=0/SUCCESS)
Main PID: 6029 (chronyd)
CGroup: /system.slice/chronyd.service
 └─6029 /usr/sbin/chronyd

Jun 07 10:20:28 CentOS7-Node3 systemd: Starting NTP client/server...
Jun 07 10:20:28 CentOS7-Node3 chronyd: chronyd version 3.2 starting (+CMDMON +NTP +REFCLOCK +RTC +PRIVDROP +SCFILTER +...DEBUG)
Jun 07 10:20:28 CentOS7-Node3 chronyd: Initial frequency -29.914 ppm
Jun 07 10:20:28 CentOS7-Node3 systemd: Started NTP client/server.
Jun 07 10:20:33 CentOS7-Node3 chronyd: Selected source 37.218.240.198
Jun 07 10:20:33 CentOS7-Node3 chronyd: System clock wrong by -3.020089 seconds, adjustment started
Jun 07 10:20:30 CentOS7-Node3 chronyd: System clock was stepped by -3.020089 seconds
Hint: Some lines were ellipsized, use -l to show in full.</code></pre>
<div class="toolbar"> </div>
</div>
作为时间服务器做如下配置：
<div class="code-toolbar">
<pre class="brush:bash;toolbar:falselanguage-bash"><code class="language-bash"> # vim /etc/chrony.conf
25 # Allow NTP client access from local network.
26 allow 192.168.231.0/24
27
28 # Serve time even if not synchronized to a time source.
29 local stratum 10</code></pre>
<div class="toolbar"> </div>
</div>
 
三台服务器时间，CentOS7-Node3为正常时间
<img src="https://s1.51cto.com/images/20180607/1528359059377714.png?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=">
 
客户端配置：
客户端1：
将 server 0.rhel.pool.ntp.org iburst ---server 3.rhel.pool.ntp.org iburst 删除或注释
新增\修改配置：
server 192.168.231.130 iburt
allow 192.168.231.0/24
<div class="code-toolbar">
<pre class="brush:bash;toolbar:falselanguage-bash"><code class="language-bash"># vim /etc/chrony.conf
1 # Use public servers from the pool.ntp.org project.
2 # Please consider joining the pool (http://www.pool.ntp.org/join.html).
3 #server 0.rhel.pool.ntp.org iburst
4 #server 1.rhel.pool.ntp.org iburst
5 #server 2.rhel.pool.ntp.org iburst
6 #server 3.rhel.pool.ntp.org iburst
7 server 192.168.231.130 iburst
8 # Ignore stratum in source selection.
9 stratumweight 0
10
11 # Record the rate at which the system clock gains/losses time.
12 driftfile /var/lib/chrony/drift
13
14 # Enable kernel RTC synchronization.
15 rtcsync
16
17 # In first three updates step the system clock instead of slew
18 # if the adjustment is larger than 10 seconds.
19 makestep 10 3
20
21 # Allow NTP client access from local network.
22 allow 192.168.231.0/24</code></pre>
<div class="toolbar"> </div>
</div>
修改完成后，保存，重启chrony服务即可生效
# systemctl restart chronyd
 
客户端2 CentOS6-Node2
CentOS 6 为NTP
执行 ntpdate 192.168.231.130
<div class="code-toolbar">
<pre class="brush:bash;toolbar:falselanguage-bash"><code class="language-bash"># ntpdate 192.168.231.130
7 Jun 16:59:34 ntpdate: the NTP socket is in use, exiting</code></pre>
<div class="toolbar"> </div>
</div>
若出现上述错误，将ntp服务停止，再执行ntpdate 192.168.231.130
<div class="code-toolbar">
<pre class="brush:bash;toolbar:falselanguage-bash"><code class="language-bash"># service ntpd stop
Shutting down ntpd: 
# ntpdate 192.168.231.130
7 Jun 17:00:19 ntpdate: step time server 192.168.231.130 offset -13589998.9
54539 sec# service ntpd status
ntpd is stopped
# date
Thu Jun7 17:00:37 CST 2018</code></pre>
<div class="toolbar"> </div>
</div>
随后在计划任务中添加时间同步
<div class="code-toolbar">
<pre class="brush:bash;toolbar:falselanguage-bash"><code class="language-bash"># crontab -e
0-59/10 * * * * /usr/sbin/ntpdate 192.168.231.130</code></pre>
<div class="toolbar"> </div>
</div>
10分钟同步一次
 
现在查看下三台服务器时间是一致的了
<img src="https://s1.51cto.com/images/20180607/1528362264461299.png?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=">
<pre class="brush:bash;toolbar:falselanguage-bash"><code class="language-bash"> </code></pre>
</div>
</div>
</div> 
来源：https://www.cnblogs.com/hanbowen/p/11563757.html

頁: [1]

琼殿技术论坛's Archiver

Linux服务器时间同步配置