[App] NTP + Keepalived
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ntp01
192.168.1.150
ntp02
192.168.1.151
os
rhel 7.2
1、初始化系统 (两个节点)
# systemctl disable firewalld
# vi /etc/selinux/config
SELINUX=disabled
# reboot
#yum -y install ntp keepalived
# systemctl enable ntpd keepalived
# systemctl start ntpd
2、配置keepalbved
ntp01:
# vi/etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
router_id node01
}
vrrp_script chk_ntp_port {
script "/etc/keepalived/ntpd.sh" # 这里是可以自己写个脚本,重启ntp服务
interval 3
weight 2
}
vrrp_instance VI_1 {
state MASTER
interface eno16780032
virtual_router_id 100
priority 200
advert_int 1
authentication {
auth_type PASS
auth_pass dashuaibi
}
track_script {
chk_ntp_port
}
virtual_ipaddress {
192.168.1.155
}
}
# systemctl start keepalived
# ip a #查看浮动ip
ntp02:
# vi/etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
router_id node02
}
vrrp_instance VI_1 {
state BACKUP
interface eno16780032
virtual_router_id 100
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass dashuaibi
}
virtual_ipaddress {
192.168.1.155
}
}
# systemctl start keepalived
3、测试
ntp01:
# systemctl stop keepalived
# ip a #已经没有 155这个ip了
ntp02:
# ip a #这个时候应该切换到ntp2了
#登录到其他机器上手动 ntpdate 192.168.1.155
17 Oct 14:59:14 ntpdate[2648]: adjust time server 192.168.1.155 offset 0.182829 sec
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