分有外网和无外网情况。
- 注意配置ip映射
1. 有外网
- 每台机器直接安装使用ntp服务，让时间与网络时间同步。
安装
[root@redoop01 ~]# for ip in $(cat hosts);do ssh ${ip} yum install -y ntp; done
启动
[root@redoop01 ~]# for ip in $(cat hosts);do ssh ${ip} systemcntl start ntpd ; done
开机自启动
[root@redoop01 ~]# for ip in $(cat hosts);do ssh ${ip} systemcntl enable ntpd ; done2. 无外网，选一台机器做ntp server,其他机器做 ntp client
- 集群所有机器安装 ntp
[root@redoop01 ~]# for ip in $(cat hosts);do ssh ${ip} yum install -y ntp; done- 启动ntp server节点 ntp服务
systemctl start ntpd
systemctl enable ntpd- 在server节点上设置其ntp服务器为其自身，同时设置可以接受连接服务的客户端，通过更改/etc/ntp.conf文件来实现，其中server设置127.127.1.0为其自身，新增加一个restrict段为可以接受服务的网段
# 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
restrict 192.168.0.0 mask 255.255.0.0
# 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 127.127.1.0
#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
### - 重启ntp server 节点的 ntp 服务
systemctl restart ntpd- 在client节点上设置ntp server机器为 授时服务器
# 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 redoop03
#server 0.centos.pool.ntp.org iburst
#server 1.centos.pool.ntp.org iburst
#server 2.centos.pool.ntp.org iburst
- 在client节点上同步server的时间
ntpdate redoop03- client节点启动ntpd服务
systemctl start ntpd
systemctl enable ntpd- 所有节点启动时间同步
timedatectl set-ntp yes- 查看同步效果
[root@redoop01 ~]# for ip in $(cat hosts);do ssh ${ip} date -R;done
Mon, 26 Mar 2018 16:03:08 +0800
Mon, 26 Mar 2018 16:03:08 +0800
Mon, 26 Mar 2018 16:03:09 +0800
[root@redoop01 ~]#
更多精彩原创文章，详见红象云腾社区