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Chapter 24. Miscellaneous administration tasks

194

Table 24.1. Offset attribute values

Value Description

utc The guest clock will be synchronized to UTC

when booted.

localtime The guest clock will be synchronized to the

host's configured timezone when booted, if any.

timezone The guest clock will be synchronized to a given

timezone, specified by the timezone attribute.

variable The guest clock will be synchronized to an

arbitrary offset from UTC. The delta relative

to UTC is specified in seconds, using the

adjustment attribute. The guest is free to

adjust the Real Time Clock (RTC) over time and

expect that it will be honored following the next

reboot. This is in contrast to utc mode, where

any RTC adjustments are lost at each reboot.

•

timezone

The timezone to which the guest clock is to be synchronized.

•

adjustment

The delta for guest clock synchronization. In seconds, relative to UTC.

Example 24.1. Always synchronize to UTC

Example 24.2. Always synchronize to the host timezone

Example 24.3. Synchronize to an arbitrary timezone

Example 24.4. Synchronize to UTC + arbitrary offset

<timer>

A clock element can have zero or more timer elements as children. The timer element specifies a time

source used for guest clock synchronization. The timer element has the following attributes. Only the

name is required, all other attributes are optional.

•

name

The name of the time source to use.

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Red Hat ENTERPRISE LINUX 5 - VIRTUALIZATION GUIDE Guida di Installazione Pagina 204