CDH5.3 cluster Installation Notes-environment preparation (2)

2. Installation time Server

• Install the NTP service in server1.cdhwork.org (192.168.10.1) to ensure that the server has access to the extranet:

Yum-y Install Ntpchkconfig--add ntpdchkconfig ntpd on

• To edit an NTP configuration file:

Cp/etc/ntp.conf/etc/ntp.conf.bakvi/etc/ntp.conf

Modify the following sections:

# Permit time synchronization with We time source, but does not# Permit the source to query or modify the service in this s ystem.# restrict default Kod nomodify notrap nopeer noquery# restrict default nomodifyrestrict 192.168.10.0 mask 255.255.2 55.255 Notrust nomodify Notrap

and the following sections:

# Servers from the pool.ntp.org project.# please consider joining the pool (http://www.pool.ntp.org/join.html). Server 0.rhel.pool.ntp.orgserver 1.asia.pool.ntp.orgserver 3.asia.pool.ntp.orgserver 3.cn.pool.ntp.org

Save exit.

• Server1 Execution Time Update:

Ntpdate 0.rhel.pool.ntp.org

• Start the NTP service on Server1:

Service NTPD Start

The time server installation on this server1 is complete.

• The next step is to perform the following command on all servers, update the time and do a timed task, and synchronize the clock at intervals.

Ntpdate 192.168.10.1echo ' */30 * * * * root/usr/sbin/ntpdate 192.168.10.1 ' >>/etc/crontabchkconfig crond onservice Crond restart

If you encounter

Jan 22:03:05 ntpdate[13550]: The NTP socket is on use, exiting

Error prompt, it is because the NTPD process is already running on this server and needs to perform service NTPD stop NTPD services.

Time synchronization is to ensure that all servers on the same time, this is hbase regionserver installation requirements, in order to facilitate processing, we simply put all the servers are clock synchronization.

Server environment We have basically done, we need to install the software environment behind.

CDH5.3 cluster Installation Notes-environment preparation (2)