Ondrej Žilinec – IT Blog

I had to change NTP servers on 40 ESX servers today. When I started to click this settings via vShere Client I was bored after two pieces 🙂 Then I have decided to use vShere PowerCLI.

Run vShere PowerCLI. Then I had to connect to Virtual Infrastructure server:

Connect-VIServer vCenterSERVER_Name.domain

List all ESX servers and put this list into variable:

$hosts=Get-Cluster Cluster | Get-VMHost

And the last, run couple commands to proceed:

ForEach ($ESX in $hosts)

{

     Remove-VMHostNtpServer -NtpServer “NTP_SERVER_OLD1” -VMHost $ESX | Out-Null;

     Remove-VMHostNtpServer -NtpServer “NTP_SERVER_OLD2” -VMHost $ESX | Out-Null;

     Add-VmHostNtpServer -NtpServer “NTP_SERVER_NEW_01” -VMHost $ESX | Out-Null;

     Add-VmHostNtpServer -NtpServer “NTP_SERVER_NEW_02” -VMHost $ESX | Out-Null;

     Get-VMHostService -VMHost $ESX | Where-Object {$_.key -eq “ntpd” } | Restart-VMHostService -Confirm:$false | Out-Null

}

And everything was set in couple of seconds 🙂

Remove-VMHostNtpServer – removes NTP settings for ESX

Add-VMHostNtpServer – adds NTP settings for ESX

Last command restarted ntpd service.

Have a nice day,