中小型规模网站集群架构:时间同步-ntp
： Ago linux运维群：https://hankbook.cn
前言：
时间服务器部署，这样可以防止网络带来的阻塞和延迟导致服务器的时间不一致，时间的不一致容易导致各种错误。假如监控时间报错了，你老大会怎么想
部署：
1.安装ntp
yum -y install ntp
[root@nfs01 ~]# rpm -qa ntp
ntp-4.2.6p5-10.el6.centos.2.x86_64
2.配置文件
[root@m01 ~]# grep -Ev "#|^$" /etc/ntp.conf
driftfile /var/lib/ntp/drift
restrict default nomodify
restrict 127.0.0.1
restrict -6 ::1
server ntp1.aliyun.com
server time.nist.gov
includefile /etc/ntp/crypto/pw
keys /etc/ntp/keys
步骤,此处略low，可以使用直推推送配置文件的方法
sed -i 's#server 3.centos.pool.ntp.org iburst##g' /etc/ntp.conf
sed -i 's#server 2.centos.pool.ntp.org iburst##g' /etc/ntp.conf
sed -i 's#server 1.centos.pool.ntp.org iburst##g' /etc/ntp.conf
sed -i 's#server 0.centos.pool.ntp.org iburst##g' /etc/ntp.conf
sed -i 's#restrict default kod nomodify notrap nopeer noquery##g' /etc/ntp.conf
sed -i 's#restrict -6 default kod nomodify notrap nopeer noquery##g' /etc/ntp.conf
echo -e "server ntp1.aliyun.com\nserver time.nist.gov\nrestrict default nomodify" >> /etc/ntp.conf
3.启动并查看
/etc/init.d/ntpd start
ntpq -p
剧本
---
- hosts: 172.16.1.61
tasks:
- name: install ntp
yum:
name: ntp
state: installed
- name: update cfg
shell: sed -i 's#server 3.centos.pool.ntp.org iburst##g' /etc/ntp.conf;sed -i 's#server 2.centos.pool.ntp.org iburst##g' /etc/ntp.conf;sed -i 's#server 1.centos.pool.ntp.org iburst##g' /etc/ntp.conf;sed -i 's#server 0.centos.pool.ntp.org iburst##g' /etc/ntp.conf;sed -i 's#restrict default kod nomodify notrap nopeer noquery##g' /etc/ntp.conf;sed -i 's#restrict -6 default kod nomodify notrap nopeer noquery##g /etc/ntp.conf';echo -e "server ntp1.aliyun.com\nserver time.nist.gov\nrestrict default nomodify" >> /etc/ntp.conf
- name: start ntp
service:
name: ntpd
state: started
enabled: yes
- hosts: aige
tasks:
- name: cron ntp
cron:
name: sync time
minute: "*/5"
job: '/usr/sbin/ntpdate 172.16.1.61 >/dev/null 2>&1'
