安装备OMS时启动ntp失败

问题背景与现象

主OMS已安装成功，安装备OMS时启动ntp失败，提示Wait for ntp to startup timeout。

===================================Welcome===============================================
=== STEP 1 Preparing components…
The ws_float_ip (10.103.100.106) already exists on the network.  Is it used on the active OMS HA? (y/n):y
The om_float_ip (10.103.100.104) already exists on the network. Is it used on the active OMS HA? (y/n):y
=== STEP 2 Install packages. It may take several minutes. Please wait…
Waiting for ntp to satrtup…………………………………………………….
ERROR:Wait for ntp to startup timeout.
ERROR:Installation failed.
Please run the following script to delete useless files:
/opt/huawei/Bigdata/om-0.0.1/inst/uninstall.sh

原因分析

1. 分析NTP日志（/var/log/ntp.log），发现端口不同拒绝连接，提示connect refused。
2. 检查防火墙设置：chkconfig -lst | grep fire。

解决办法

1. 1. 1. 1. 1. 1. 1. 先卸载已安装的备OMS。
                  2. 关闭防火墙设置。

chkconfig SuSEfirewall2_setup off

chkconfig SuSEfirewall2_init off

1. 1. 1. 1. 1. 1. 1. 重新安装备OMS，安装成功。