how local time for RTC affect on the VMs?

[cesarpk]

Hello to all

Could anyone answer these questions? (for KVM):

1- What is the difference between using and not using local time for RTC on the VMs?
2- How local time for RTC affect on the VMs?
3- Inclusive if each VM on the same Host have configured different time zone, what will happen with the time of each VM?

I will be very grateful to anyone who can answer these questions.

Best regards
Cesar

 

[e100]

1. If using local time for RTC then the VM will see the RTC time as local time, is not using local time then it will see UTC time.
2. It is just the time that the VM will see when it asks the RTC what time it is.
3. In that case you would be best to use UTC for the VM RTC and ensure that the VM OS is aware that the RTC is in UTC.

 

[cesarpk]

1. If using local time for RTC then the VM will see the RTC time as local time, is not using local time then it will see UTC time.
2. It is just the time that the VM will see when it asks the RTC what time it is.
3. In that case you would be best to use UTC for the VM RTC and ensure that the VM OS is aware that the RTC is in UTC.

Thank you very much e100
Now i understand it.

Best regards
Cesar