To synchronize your Eucalyptus component machines with an NTP server, perform the following tasks.
Enter the following command on a machine hosting a Eucalyptus component:
# ntpdate pool.ntp.org
# systemctl start ntpd.service
# systemctl enable ntpd.service
# ps ax | grep ntp
# hwclock --systohc
Repeat for each machine hosting a Eucalyptus component.