Azure-docs: Execute custom script more than once.

[rizwaans]

Can someone please provide me an example on how to execute/invoke the existing customscript extension. I know the document suggested to use timestamp thing but I wasn't able to figure out the powershell script to do it. Help!!

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• ID: 40aaccb8-19ba-168f-f5bf-65f1f5331541
• Version Independent ID: 6cdfd166-633a-50a3-2b45-cde0e991e540
• Content: Azure Custom Script Extension for Windows
• Content Source: articles/virtual-machines/extensions/custom-script-windows.md
• Service: virtual-machines-windows
• GitHub Login: @roiyz-msft
• Microsoft Alias: roiyz

[mimckitt]

Thanks for the question! We are investigating and will update you shortly.

[rizwaans]

Just being more precise.
1.Is there a cmdlt that invokes the existing customextension script?

1. what happens when I run the same Set-AzureRMVMCustomScriptExtension "mytestscript" more than once. Does it overwrites the existing script?

[Karishma-Tiwari-MSFT]

@roiyz-msft Can you please help answer customer's question? Should the doc contain more info on it? Thanks. :)

[Karishma-Tiwari-MSFT]

@rizwaans I found this blog on Using the Azure Custom Script Extension to execute a PowerShell script multiple times on an Azure Windows VM from an Azure Automation Runbook.
Please check if that helps. Thanks.

[Karishma-Tiwari-MSFT]

@rizwaans Any update? Did that help?

[rizwaans]

Hi @Karishma-Tiwari-MSFT ,
The provided link didn't help me much.

I am looking for a cmdlet that invokes the existing custom extension script. or Just do I just need to use the "Set- AzureRmVMCustomScriptExtension" cmdlet to execute the already deployed/provisioned script.

Let me take a sample scenario.

1. I want to run a script on my virtual machine that captures the information of the services running and save it to a text file.
2. Deployed a custom extension script (_myCustomExtScript_)and it is provisioned successfully.
3. I again want to run the same script to capture the information of services running, So I want to execute the already deployed myCustomExtScript.
   So, Is there any separate cmdlet to execute or just the same Set- AzureRmVMCustomScriptExtension

[Karishma-Tiwari-MSFT]

@roiyz-msft Did you get a chance to take a look at this question? Thanks.

[roiyz-msft]

I've asked @csand-msft to take a look.

[csand-msft]

@rizwaans Quick answer (haven't tried it yet) based on looking at the examples here: https://github.com/Azure/azure-linux-extensions/tree/master/CustomScript I would try to set the timestamp in the -Settingstring parameter. See section 2.2.2 for the PowerShell and section 3.4 on how to set the timestamp.

[Karishma-Tiwari-MSFT]

@rizwaans Can you please take a look at the suggestion above and see if that helps you. Thanks.

[rizwaans]

@Karishma-Tiwari-MSFT , @csand-msft I'm little confused here, Are Set-AzureRMVMExtension and Set-AzureRmVMCustomScriptExtension same? Do they both serve the same purpose of running a pre-developed script on VM's

[Karishma-Tiwari-MSFT]

test

[jakaruna-MSFT]

@rizwaans This PowerShell script runs the custom extension for every invocation.
Like @csand-msft suggested, I added the timestamp as an argument. So for every execution, Timestamp will have a different value, which changes the configuration of custom script extension.
Because of the configuration change, Extension executes again.

$fileUri = @("https://raw.githubusercontent.com/jakaruna-MSFT/script-for-extension/master/script.ps1")

#get the timestamp (epoch)
$timestamp = Get-Date -UFormat "%s"

$Settings = @{"fileUris" = $fileUri; "timestamp" = $timestamp };


$ProtectedSettings = @{"commandToExecute" = "powershell -ExecutionPolicy Unrestricted -File script.ps1"};

#run command
Set-AzureRmVMExtension -ResourceGroupName "my_group" -Location "central us" -VMName "myvm" -Name "custom-script" -Publisher "Microsoft.Compute" -ExtensionType "CustomScriptExtension" -TypeHandlerVersion "1.9"     -Settings $Settings  -ProtectedSettings $ProtectedSettings 

Also note that Custom script extension is designed to execute once. You can consider Desired State Configuration if you want to execute periodically.

[rizwaans]

Excellent, Thanks very much @jakaruna-MSFT

[Karishma-Tiwari-MSFT]

@jakaruna-MSFT Thanks :)
@rizwaans Glad to know it helped. We will now close this issue. If there are further questions regarding this matter, please reopen it and we will gladly continue the discussion.