6 sporadic upload chunk failure to azure storage blob

[tjgruber]

Pull Request Summary

This PR addresses the reliability issues encountered during the upload of .intunewin files to Azure Storage blobs by implementing comprehensive retry logic and refining the SAS URI renewal process.

Key Changes:

1. Retry Logic for Chunk Uploads and Finalization:

   • Added retry mechanism for chunk uploads with a maximum of 5 attempts.
   • Introduced warnings for each retry attempt to enhance visibility into the upload process.
   • Finalization steps now also include retry logic to ensure completion.

2. SAS URI Renewal Adjustments:

   • Removed the SAS URI renewal attempt from the first retry, opting for a straightforward retry process instead.
   • SAS URI renewal is still attempted if the timer indicates a need for renewal after the initial retries.

Detailed Changes:

• Invoke-AzureStorageBlobUpload.ps1:
  • Enhanced retry logic for chunk uploads and finalization steps.
• Invoke-AzureStorageBlobUploadChunk.ps1:
  • Added exception throwing to support retry logic.
• Invoke-AzureStorageBlobUploadFinalize.ps1:
  • Added exception throwing to support retry logic in the finalization process.
• Invoke-AzureStorageBlobUploadRenew.ps1:
  • Added a loop to check the status of the SAS URI renewal process.

These improvements are aimed at increasing the robustness and reliability of the Intune Win32 app upload process, reducing the likelihood of failures due to transient issues (throttling) or SAS URI expiration.

Commits:

• Fix: Add retry logic for Azure Blob uploads
• Fix: Add SAS URI renewal on first retry with fallback mechanism
• Fix: Removed renewal from retry logic for initial retries
• Fix: Add chunk upload retry warning

Impact:

These changes are expected to significantly improve the success rate of .intunewin file uploads to Azure Storage blobs, making the process more resilient to throttling issues.