2. Debugging and troubleshooting Azure applications using Visual Studio
Boris Scholl
Sr. Program Manager Visual Studio Azure Tools
3-547

3. Agenda Overview Cloud Services Windows Azure web sites
Build 2013
9/20/2018
Agenda
Overview
Cloud Services
Windows Azure Diagnostics
IntelliTrace
Profiling
Windows Azure web sites
Diagnostics
Live Tracing
Visual Studio Developer Desktop
Summary
© 2013 Microsoft Corporation. All rights reserved. Microsoft, Windows, and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

4. Overview Environmental differences. Performance issues.
Common issues with Azure applications.
Environmental differences.
What works in the Azure Emulator does not work in Azure.
Performance issues.
Site loads slowly.
Computation takes a long time.
Logical issues in code.
My computation task returns a wrong result.

5. Cloud Services – Windows Azure diagnostics
What can I use Azure Diagnostics for?
Collects the following diagnostics information.
Windows event logs.
Performance counters.
Azure logs (trace logs, infrastructure logs).
IIS logs (IIS logs, failed requests logs).
Crash dumps.
Custom logs.

6. Cloud Services – Windows Azure diagnostics
Build 2013
9/20/2018
Cloud Services – Windows Azure diagnostics
How does it work in a developer scenario?
Diagnostics.wadcfg
Web/app.config
Web/app.config
Diagnostics.wadcfg
wad-control-container
© 2013 Microsoft Corporation. All rights reserved. Microsoft, Windows, and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

7. Cloud Services – Windows Azure diagnostics
What is the precedence of the configuration options?
Diagnostics monitor precedence for configuration.
BLOB storage
Code
Diagnostics.wadcfg
Default config

8. Note – Azure web role architecture
Keep in mind that there are two processes.
MvcWebRole1
*.cspack
WaIIShost.exe
MvcWebRole1.dll
MvcWebRole1.dll
AppRoot
Package
w3wp.exe
MvcWebRole1.dll
SiteRoot
MvcWebRole1.dll

9. Windows Azure Diagnostics in Visual Studio

10. Cloud Services – Windows Azure diagnostics
Build 2013
9/20/2018
Cloud Services – Windows Azure diagnostics
Azure diagnostics things to keep in mind!
Visual Studio includes the diagnostics agent by default.
If the diagnostics connection string is not changed the diagnostics data will be stored in the storage account used for publishing.
Failed requests need to be setup manually in web.config.
Need to add config file for RoleEnvironment diagnostics.
Redeploy required if changes are made to code or config.
You can avoid a full redeploy by using RoleInstanceDiagnosticManager.
Tracing strategy can be tested locally by using the storage emulator.
© 2013 Microsoft Corporation. All rights reserved. Microsoft, Windows, and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

11. Cloud Services – IntelliTrace (Visual Studio Ultimate)
What is IntelliTrace ?
A debugging experience allowing you to rewind/replay program execution in the debugger.
Captures WaIIShost.exe and w3wp.exe events.
Great for chasing down logical errors.
Great for detecting missing assemblies*.
*We improved Visual Studio to detect missing assemblies during Build time. If missing assembly is detected we provide a Build warning.

12. Cloud Services – IntelliTrace
TechReady 16
9/20/2018
Cloud Services – IntelliTrace
Azure role instance
IntelliTrace.exe
User requests logs
IntelliTrace agent
Visual Studio
*.itrace
Polls queue every 1 second
Create Agent Q
GetLogs, Q1
Create Q1 and place request in agent Q
*.itrace
Pending
Create Snapshot
Upload to BLOB
Upload to Visual Studio
Complete
Azure storage = user storage account!
© 2013 Microsoft Corporation. All rights reserved. Microsoft, Windows, and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

13. IntelliTrace

14. Cloud Services – Profiler (Visual Studio Pro)
What does the profiler do?
Instrumentation
Records how long every method takes to execute.
Useful when the app is slow/blocked waiting for another operation (call another service, database call etc.)
Impacts perf of application if many short running function.
Can create gigs of log files in minutes.
Sampling
Very lightweight.
Useful for identifying inefficient algorithms.

15. Cloud Services – Profiler (Visual Studio Pro)
What does the profiler do?
TIP (Premium+ feature)
Used in conjunction with instrumentation*.
Records ADO.NET database queries.
Resource contention data (concurrency)
Detects threads waiting for other threads.
Useful for detecting performance problems caused by lock contentions.
*Used to work with sampling on Windows 7

16. Profiler

17. Cloud Services – IntelliTrace/profiler
Things to keep in mind/tricks.
Concurrency of agents
CLR agents cannot run concurrently.
Polling interval
Polling interval can be changed.
Add key <add key=" RequestPollInterval" value="00:00:10"/> to WindowsAzureDiagnosticsAgent.exe.config (C:\Program Files (x86)\Windows Azure Tools\Visual Studio 11.0\1.8\VsDiagnostics).

18. Azure web site – Diagnostics
Build 2013
9/20/2018
Azure web site – Diagnostics
Windows Azure web sites diagnostics options
Site diagnostics
Detailed error logging.
Failed request tracing.
Web server logging.
Application diagnostics
Produced by the web application itself.
Works similar to Cloud Service diagnostics.
Use System.Diagnostics.Trace class.
No configuration required.
© 2013 Microsoft Corporation. All rights reserved. Microsoft, Windows, and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

19. Azure web site – Diagnostics
Build 2013
9/20/2018
Azure web site – Diagnostics
Windows Azure web sites can be enabled from the portal and Visual Studio Server Explorer
Diagnostics configuration
Logging level
Informational
Warning
Error
File system
Stores data on web site file system
Can be accessed by FTP or downloaded
Storage
Stores data in Windows Azure storage account
In WAWSAppLogTable (similar schema as WADLogs)
Streaming logs
Live stream to PowerShell Window, Command Line or Visual Studio
© 2013 Microsoft Corporation. All rights reserved. Microsoft, Windows, and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

20. Web site diagnostics architecture
Build 2013
9/20/2018
Web site diagnostics architecture
How does it work in
a developer scenario?
Web App
Azure Drive Trace Listener
Azure TableTrace Listener
Kudu Log streaming
Azure BLOB
Azure Table
Storage
Streamed Logs
WebSite Drive
© 2013 Microsoft Corporation. All rights reserved. Microsoft, Windows, and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

21. Windows Azure Web Sites Diagnostics

22. Developer desktop preview in Azure
I need to debug and troubleshoot an application and I need to set up an environment quickly.
Developer desktop on Azure IaaS
Supports SharePoint, Web and SQL development.
Visual Studio 2013 Ultimate Preview pre-installed.
SharePoint 2013 pre-installed.
SQL Server 2012 Express pre-installed.
Scripts to configure the environment included.
Great for spinning up dev environments quickly.
Can be provisioned from portal or entirely through PowerShell with AD support.

23. Resources

24. Get your goodies Acer Iconia W3, Surface Pro, and Surface Type Cover
Device distribution starts after sessions conclude today (approximately 6:00pm) in the Big Room, Hall D.
If you choose not to pick up your devices tonight, distribution will continue for the duration of the conference at Registration in the North Lobby.

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© 2013 Microsoft Corporation. All rights reserved. Microsoft, Windows, and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries. The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.