Updating DNS, NTP, and Domain via PowerCLI

To start off with, I did not write this script but I have tested a modified version of it (removed NTP and Domain pieces) as I did not need to perform everything it does.


# PowerCLI Script to Configure DNS and NTP on ESXi Hosts
# PowerCLI Session must be connected to vCenter Server using Connect-VIServer

# Prompt for Primary and Alternate DNS Servers
$dnspri = read-host “Enter Primary DNS”
$dnsalt = read-host “Enter Alternate DNS”

# Prompt for Domain
$domainname = read-host “Enter Domain Name”

#Prompt for NTP Servers
$ntpone = read-host “Enter NTP Server One”
$ntptwo = read-host “Enter NTP Server Two”

$esxHosts = get-VMHost

foreach ($esx in $esxHosts) {

Write-Host “Configuring DNS and Domain Name on $esx” -ForegroundColor Green
Get-VMHostNetwork -VMHost $esx | Set-VMHostNetwork -DomainName $domainname -DNSAddress $dnspri , $dnsalt -Confirm:$false

Write-Host “Configuring NTP Servers on $esx” -ForegroundColor Green
Add-VMHostNTPServer -NtpServer $ntpone , $ntptwo -VMHost $esx -Confirm:$false

Write-Host “Configuring NTP Client Policy on $esx” -ForegroundColor Green
Get-VMHostService -VMHost $esx | where{$_.Key -eq “ntpd”} | Set-VMHostService -policy “on” -Confirm:$false

Write-Host “Restarting NTP Client on $esx” -ForegroundColor Green
Get-VMHostService -VMHost $esx | where{$_.Key -eq “ntpd”} | Restart-VMHostService -Confirm:$false

Write-Host “Done!” -ForegroundColor Green

Credit for this script goes to vHersey
Full article fond HERE