periodically overridding NTP for simulation purposes
When we conduct our DR exercises, we have to rerun production batches from the previous day. In order to accommodate the rerunning of these batches, the system clocks on all our servers are moved back (9 hours for an internal exercise, or 24 hours if we involve our end users).
The Domain Controller will be started and NTP will be reconfigured. Then all the client machines will be started.
The time offset needs to be completed first.
Can anyone help with the steps to complete the system time offset, since this need to be completed before the rest of the servers are brought up?
Below is a high-level view, I need help filling in the blanks to create a procedure.
- Domain controller: change NTP Server configuration to point to local hardware clock as stratum 9
- Customer Unix server clients: Stop
ntpdate <DC IP address>, start
- Infrastructure Unix servers (if necessary). Stop xntpd, and change clock manually.