Categories: PowerShell ScriptsVMware

PowerCLI: Reconfiguring NTP Servers on ESX Hosts

Just lately I’ve been creating a lot of PowerCLI scripts to help configure various aspects of out ESX environment. We’ve just implemented a new NTP Server to our network. So I was given the job to update all of our ESX Hosts. I didn’t fancy spending all morning manually changing them, so I set to work in creating a PowerCLI script to do the business. Here is the result.

$Cluster = "<cluster name>" 
$Hosts = Get-Cluster $Cluster | Get-VMHost 
ForEach ($Host in $Hosts) 
{ 
Remove-VmHostNtpServer -NtpServer "<old ntp server>" -VMHost $Host | Out-Null  
Add-VmHostNtpServer -NtpServer "<new ntp server>" -VMHost $Host | Out-Null 
Get-VmHostService -VMHost $Host | Where-Object {$_.key -eq "ntpd"} | Restart-VMHostService -Confirm:$false | Out-Null 
write "NTP Server was changed on $Host" 
}

Simon Long

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View Comments

HJ says:

April 20, 2010 at 2:26 pm

hi
Great, just what i needed!
If i have more than one cluster, how would the script need to be changed?
(say i added all clusters in a file clusters.txt)

HJ
- Guest says:
  
  January 18, 2013 at 6:22 pm
  
  get rid of the $cluster variable and set your $hosts variable to the following
  $hosts = get-vmhost
Claud says:

February 7, 2014 at 6:21 pm

we have had multiple techs over the years use different values for "old ntp server". is there a command to use to remove whatever is there ?
Thanks, Claud
Simon Long says:

February 10, 2014 at 8:26 am

Hi Claud, you can probably use the Remove-VMHostNtpServer Cmdlet - https://www.vmware.com/support/developer/PowerCLI/PowerCLI41U1/html/Remove-VMHostNtpServer.html