ntp time synchronization configuration
After the Hadoop cluster is set up, let's do the time zone synchronization first
. Use the following command to install ntp on all three virtual machines
yum -y install ntp
Then use the following command to set ntp to start automatically on the three machines
chkconfig ntpd on
Modify the host's ntp.conf file below
vi /etc/ntp.conf
As shown in the figure, uncomment restrict 192.168.1.0 mask 255.255.255.0 nomodify notrap.
Comment out the four lines server as shown in the figure and add it below:
server 127.127.1.0
fudge 127.127.1.0 stratum 10
The modification of the other two ntp.conf is the same as follows:
Uncomment restrict 192.168.1.0 mask 255.255.255.0 nomodify notrap as shown in the figure.
Also comment out the four lines of server and add it below:
server 127.127.1.0
fudge 127.127.1.0 stratum 10
server hadoop001
restrict hadoop001 nomodify notrap noquery
Where hadoop001 is your hostname or IP address
Start the ntp service:
service ntpd start
Enter the following commands on the three virtual machines to view the time synchronization results:
ntpstat
The above figure synchronised to NTP server appears after the three virtual machines execute the command, that is, the time synchronization is successful.