The settings can be accessed by access the Edit Settings of a VM. Turns out all these special events can be individually disabled by entering them into the Configuration Parameters section of vCenter for the VM or editing the VMX file.Ĭonfiguration Parameters can only be edited while the VM is off. There are also other side effects like time jumping over scheduled tasks. There are certainly situations where you might have time sensitive VMs that rely on external time sources. I had seen this behavior in the past and though it was more a bug rather than a design feature. All these events are touching the guest in some way and you want logs and timestamps in sync, but it’s still not cool. I can understand the logic of why they are doing this.
Time will resync with a vMotion, snapshotting, disk shrink, or a restart of the tools. Even with this setting unchecked what you probably don’t realise is that there are “special” events that will still initiate a time sync between the guest and host.
#Vmx tools synctime install#
When you install VMware Tools into a guest VM there is an option we are all familiar with, “Time synchronization between the virtual machine and the ESX Server”. Though one issue is too many for me nowadays. For the most part, true, it’s not an issue. When you view the vm_name.vmx file, you see the parameter inserted as tools.syncTime = "FALSE".One thing that I hate is time syncing of VMs. Note: When adding tools.syncTime via the Configuration Parameters in vSphere 5.x, it is not displayed again after the entry has been accepted and closed.
Right click the virtual machine and choose Edit Settings….Select the virtual machine in the vSphere Web Client inventory and power it off.To completly disable time synchronization, we need to do change on VMware VM.
Especially time is resynchronized when you migrate the virtual machine using vMotion, take a snapshot, restore to a snapshot, shrink the virtual disk, or restart the VMware Tools service in the virtual machine (including rebooting the virtual machine). I found article on VMware, that this can sometimes happen. Ok, now its comming question, how is possible, that time is change by VMware even if I have this setting disabled? Then search in Security log event id 4616.īOOOM! we found the root cause! vmtoolsd.exe alias VMware Once the auditing will be enabled, we have to wait untli time change will occure. Run the Local Security Policy (secpol.msc), and go to Local Policies\Audit Policy, open Audit privilege use and check Success checkbox. To be able to find, what process is calling time change, you will need to enable Audit privilege use and then search for event ID 4616 Ok, now we know that NTP server is set correctly, but our computer still getting the time from different source. You see, that IP and source are correct and in case of domain joined computer, you will see probably IP and FQDN of your domain controller. Open CMD and run follwoing command w32tm /query /status You see the prove, that „something“ is changing time. Open event viewer, go to system events and filter event ID 1, source Kernel-General But you will find out, that checkbox is unchecked. First thing which will come to your mind is, lets check checkbox on Vmware which is enabling or disabling synchronization with host. You have virtual machine on VMware and clock are from time to time automaticaly sync, but not with NTP source you have, but from different source.
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