Red Hat LINUX VIRTUAL SERVER 4.6 - ADMINISTRATION Guia de Instalação descarregar pdf (Página 12)

To verify these changes, reboot the system:

reboot

After reboot, check that this has been set correctly:

su -

cat /proc/sys/xen/independent_wallclock

This should return the value 1.

4.5.2 Microsoft Hyper-V

4.5.2.1 Fix Time Synchronization

Linux VMs with Hyper-V Linux Integration Services installed can leverage the Hyper-V time

synchronization feature to use the host operating system's time. To ensure the system clock remains

accurate, this feature should be enabled alongside NTP services.

From the management operating system:

1. Open the Hyper-V Manager console.

2. For the settings of a Linux VM, select Integration Services.

3. Ensure Time synchronization is checked.

Note that this approach is different from VMware and XenServer, where host time synchronization

is disabled to avoid conflicts with NTP. Hyper-V time synchronization can co-exist and supplement

NTP time synchronization.

4.5.3 VMware ESX and ESXi

4.5.3.1 Fix Time Synchronization

If the VMware Time Synchronization feature is enabled, within each paravirtualized Linux VM you

will experience issues with NTP and the hypervisor both trying to synchronize the system clock. To

avoid the clock becoming out of sync with other servers, the system clock within each Linux guest

must be synchronized with NTP only. This requires disabling host time synchronization.

If running a paravirtualized Linux kernel with VMware Tools installed:

1. Open the vSphere Client.

2. Edit settings for the Linux VM.

3. In the Virtual Machine Properties dialog, open the Options tab.

4. Select VMware Tools.

5. In the Advanced box, uncheck Synchronize guest time with host.

4.6 Add Machine to Windows Domain

There are currently two methods for adding Linux machines to the Windows domain that are

supported by the Linux VDA:

1. Samba Winbind

2. Quest Authentication Service

Follow the instructions below for your chosen method.

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