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Merge pull request #224038 from v-ksreedevan/16Jan-NWExtension
Updated PowerShell script to update NWExtensions
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‎articles/virtual-machines/extensions/network-watcher-update.md

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@@ -6,7 +6,7 @@ author: shijaiswal
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tags: azure-resource-manager
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ms.service: virtual-machines
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ms.topic: article
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ms.date: 11/28/2022
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ms.date: 01/16/2023
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ms.author: v-ksreedevan
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ms.custom: devx-track-azurepowershell
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@@ -47,94 +47,78 @@ az vm extension image list-versions --publisher Microsoft.Azure.NetworkWatcher -
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Customers with large deployments who need to update multiple VMs at once. For updating select VMs manually, see the next section.
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```powershell
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<#
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.SYNOPSIS
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This script will scan all VMs in the provided subscription and upgrade any out of date AzureNetworkWatcherExtensions
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.DESCRIPTION
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This script should be no-op if AzureNetworkWatcherExtensions are up to date
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Requires Azure PowerShell 4.2 or higher to be installed (e.g. Install-Module AzureRM).
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.EXAMPLE
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.\UpdateVMAgentsInSub.ps1 -SubID F4BC4873-5DAB-491E-B713-1358EF4992F2 -NoUpdate
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<#
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.SYNOPSIS
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This script will scan all VMs in the provided subscription and upgrade any out of date AzureNetworkWatcherExtensions
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.DESCRIPTION
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This script should be no-op if AzureNetworkWatcherExtensions are up to date
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Requires Azure PowerShell 4.2 or higher to be installed (e.g. Install-Module AzureRM).
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.EXAMPLE
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.\UpdateVMAgentsInSub.ps1 -SubID F4BC4873-5DAB-491E-B713-1358EF4992F2 -NoUpdate
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#>
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[CmdletBinding()]
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param(
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[Parameter(Mandatory=$true)]
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[string] $SubID,
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[Parameter(Mandatory=$false)]
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[Switch] $NoUpdate = $false,
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[Parameter(Mandatory=$false)]
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[string] $MinVersion = "1.4.1974.1"
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)
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function NeedsUpdate($version)
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{
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if ($version -eq $MinVersion)
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{
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return $false
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}
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$lessThan = $true;
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$versionParts = $version -split '\.';
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$minVersionParts = $MinVersion -split '\.';
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for ($i = 0; $i -lt $versionParts.Length; $i++)
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{
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if ([int]$versionParts[$i] -gt [int]$minVersionParts[$i])
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{
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$lessThan = $false;
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break;
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}
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}
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return $lessThan
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}
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Write-Host "Scanning all VMs in the subscription: $($SubID)"
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Select-AzSubscription -SubscriptionId $SubID;
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$vms = Get-AzVM;
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$foundVMs = $false;
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Write-Host "Starting VM search, this may take a while"
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foreach ($vmName in $vms)
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{
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# Get Detailed VM info
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$vm = Get-AzVM -ResourceGroupName $vmName.ResourceGroupName -Name $vmName.name -Status;
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$isWindows = $vm.OsVersion -match "Windows";
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foreach ($extension in $vm.Extensions)
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{
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if ($extension.Name -eq "AzureNetworkWatcherExtension")
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{
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if (NeedsUpdate($extension.TypeHandlerVersion))
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{
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$foundVMs = $true;
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if (-not ($NoUpdate))
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{
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Write-Host "Found VM that needs to be updated: subscriptions/$($SubID)/resourceGroups/$($vm.ResourceGroupName)/providers/Microsoft.Compute/virtualMachines/$($vm.Name) -> Updating " -NoNewline
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Remove-AzVMExtension -ResourceGroupName $vm.ResourceGroupName -VMName $vm.Name -Name "AzureNetworkWatcherExtension" -Force
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Write-Host "... " -NoNewline
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$type = if ($isWindows) { "NetworkWatcherAgentWindows" } else { "NetworkWatcherAgentLinux" };
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Set-AzVMExtension -ResourceGroupName $vm.ResourceGroupName -Location $vmName.Location -VMName $vm.Name -Name "AzureNetworkWatcherExtension" -Publisher "Microsoft.Azure.NetworkWatcher" -Type $type -typeHandlerVersion "1.4"
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Write-Host "Done"
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}
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else
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{
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Write-Host "Found $(if ($isWindows) {"Windows"} else {"Linux"}) VM that needs to be updated: subscriptions/$($SubID)/resourceGroups/$($vm.ResourceGroupName)/providers/Microsoft.Compute/virtualMachines/$($vm.Name)"
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}
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}
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}
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}
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}
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if ($foundVMs)
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{
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Write-Host "Finished $(if ($NoUpdate) {"searching"} else {"updating"}) out of date AzureNetworkWatcherExtension on VMs"
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[CmdletBinding()]
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param(
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[Parameter(Mandatory=$true)]
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[string] $SubID,
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[Parameter(Mandatory=$false)]
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[Switch] $NoUpdate = $false,
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[Parameter(Mandatory=$false)]
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[string] $MinVersion = "1.4.2423.1"
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)
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function NeedsUpdate($version)
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{
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if ([Version]$version -lt [Version]$MinVersion)
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{
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$lessThan = $true
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}else{
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$lessThan = $false
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}
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return $lessThan
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}
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Write-Host "Scanning all VMs in the subscription: $($SubID)"
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Set-AzContext -SubscriptionId $SubID
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$vms = Get-AzVM
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$foundVMs = $false
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Write-Host "Starting VM search, this may take a while"
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foreach ($vmName in $vms)
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{
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# Get Detailed VM info
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$vm = Get-AzVM -ResourceGroupName $vmName.ResourceGroupName -Name $vmName.name -Status
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$isitWindows = $vm.OsName -like "*Windows*"
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foreach ($extension in $vm.Extensions)
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{
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if ($extension.Name -eq "AzureNetworkWatcherExtension")
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{
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if (NeedsUpdate($extension.TypeHandlerVersion))
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{
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$foundVMs = $true
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if (-not ($NoUpdate))
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{
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Write-Host "Found VM that needs to be updated: subscriptions/$($SubID)/resourceGroups/$($vm.ResourceGroupName)/providers/Microsoft.Compute/virtualMachines/$($vm.Name) -> Updating " -NoNewline
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Remove-AzVMExtension -ResourceGroupName $vm.ResourceGroupName -VMName $vm.Name -Name "AzureNetworkWatcherExtension" -Force
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Write-Host "... " -NoNewline
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$type = if ($isitWindows) { "NetworkWatcherAgentWindows" } else { "NetworkWatcherAgentLinux" }
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Set-AzVMExtension -ResourceGroupName $vm.ResourceGroupName -Location $vmName.Location -VMName $vm.Name -Name "AzureNetworkWatcherExtension" -Publisher "Microsoft.Azure.NetworkWatcher" -Type $type -typeHandlerVersion $MinVersion
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Write-Host "Done"
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}
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else
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{
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Write-Host "Found $(if ($isitWindows) {"Windows"} else {"Linux"}) VM that needs to be updated: subscriptions/$($SubID)/resourceGroups/$($vm.ResourceGroupName)/providers/Microsoft.Compute/virtualMachines/$($vm.Name)"
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}
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}
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}
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}
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}
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else
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{
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Write-Host "All AzureNetworkWatcherExtensions up to date"
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if ($foundVMs)
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{
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Write-Host "Finished $(if ($NoUpdate) {"searching"} else {"updating"}) out of date AzureNetworkWatcherExtension on VMs"
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}
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else
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{
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Write-Host "All AzureNetworkWatcherExtensions up to date"
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}
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```

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