I'm working on a PowerShell runspace to run a 'handler' script, and while everything executes smoothly, I'm facing a challenge with logging in Azure Functions. Here's the setup I'm using:
1. Create a default initial session state and set it to ConstrainedLanguage.
2. Open the runspace and initialize a PowerShell instance for my handler script.
3. The script runs perfectly fine, but the issue arises with output logging.
Any `Write-Information` or `Write-Warning` commands I execute inside the handler do not get logged in real-time by Application Insights. I can access the output later via `$HandlerPS.Streams`, but I'm looking for a way to capture this output live. I've also tried using a different method to create the runspace, but that seemed to make things worse. Any advice on how to make this work would be much appreciated!
2 Answers
When I worked with Runspaces, I had success using `$host` methods: `$host.UI.WriteLine()` and others to produce output on the console. Also, if you're using PowerShell 7.x, you might want to try the `ForEach-Object -Parallel` method, as it allows multithreading. Just keep in mind that it's important to manage shared data carefully.
Check out Julian Hayward's Azure Governance Visualizer for great examples of using parallel processing in Azure. It might help you structure your script better!
You might not actually need a runspace just for setting the ConstrainedLanguage mode. Instead, consider creating a job with an initialization script to set that up. Here's a quick example:
```powershell
$job = Start-Job -InitializationScript {
$ExecutionContext.SessionState.LanguageMode = 'ConstrainedLanguage'
} -ScriptBlock {
"Hello World"; Write-Host "Output logged"; Write-Warning "Watch out!"
}
```
You can then utilize `Receive-Job` to retrieve output from the job in real-time. Just remember to check if the job has completed before exiting your loop, so you don’t miss anything.
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