Debug Azure with Snapshot Debugger: A Connect 2017 Guide
Table of Contents:
- Introduction
- Challenges in Debugging Production Services
- Introduction to the Snapshot Debugger
- Benefits of Using the Snapshot Debugger
- Getting Started with the Snapshot Debugger
- Using Snap Points to Debug Production Code
- Analyzing Snapshots in Visual Studio
- Integrating Snapshot Debugger with Application Insights
- Limitations and Compatibility of the Snapshot Debugger
- Conclusion
Using the Snapshot Debugger to Debug Production Services
Introduction
Debugging issues in production services can be a challenging task for developers. It can be frustrating to Gather logs and Relevant data to identify the root cause of a problem. The Snapshot Debugger is a new tool that has been built specifically for debugging issues in production services running on Azure.
Challenges in Debugging Production Services
The Scale of your application in a production environment is vastly different from a local development environment. The sheer size and complexity of a production environment can often lead to issues that are difficult to diagnose. Acquiring the right tools to pinpoint the root cause of an issue in real-time is crucial for minimizing downtime and resolving problems quickly.
Introduction to the Snapshot Debugger
The Snapshot Debugger is a tool built into Visual Studio and Azure that allows developers to use the full functionality of the Visual Studio debugger in a production environment. The key difference is that the Snapshot Debugger does not halt or affect the running application, ensuring that there is minimal impact on the performance of the service.
Benefits of Using the Snapshot Debugger
- Full Fidelity Debugging: The Snapshot Debugger provides developers with access to the same powerful debugging features available in Visual Studio, such as call stack, locals, and breakpoints.
- Cloud-Scale Support: The Snapshot Debugger is optimized for debugging applications running at a cloud scale, ensuring that developers can debug issues regardless of the size of their application.
- Role-Based Access Control: The Snapshot Debugger is secured by role-based access control, ensuring that only authorized individuals have access to the debugging tool.
- No Code Changes Required: Developers can use the Snapshot Debugger in their production environment without making any code changes or requiring redeployment.
Getting Started with the Snapshot Debugger
To start using the Snapshot Debugger, developers must first attach it to their Azure app service within Visual Studio. Once attached, developers can set snap points in their code to capture snapshots of the application's state at specific lines. These snapshots can then be analyzed in Visual Studio, allowing developers to pinpoint the exact cause of an issue.
Using Snap Points to Debug Production Code
Snap points, similar to breakpoints, allow developers to inspect the state of their application at specific lines of code. When a snap point is hit, instead of stopping the application, a snapshot of the application's state is taken and displayed in Visual Studio. This allows developers to analyze the relevant data without impacting the running service.
Analyzing Snapshots in Visual Studio
When a snapshot is captured, developers can double-click on it in Visual Studio to enter debug mode at the corresponding line of code. In debug mode, developers have access to the call stack, local variables, and other debugging features to understand what went wrong. Additionally, developers can add log messages to specific lines of code to capture additional information during runtime.
Integrating Snapshot Debugger with Application Insights
The Snapshot Debugger can be integrated with Application Insights, a monitoring and analytics service provided by Azure. When an exception occurs in the production environment, Application Insights can capture a debug snapshot containing the full state of the application. This snapshot can be downloaded and opened in Visual Studio, allowing developers to analyze the exact state of the application when the exception occurred.
Limitations and Compatibility of the Snapshot Debugger
The Snapshot Debugger is currently available for Visual Studio Enterprise users. It is only supported for ASP.NET 4.6.1 or ASP.NET Core 2.0+ applications running on Azure app services. Developers can check the documentation for instructions on installation and compatibility.
Conclusion
The Snapshot Debugger is a powerful tool for debugging production services running on Azure. It provides developers with the ability to use the full functionality of the Visual Studio debugger in a live production environment. By capturing snapshots of the application's state, developers can quickly identify and resolve issues without the need for extensive logging or redeployment of code.
Highlights:
- The Snapshot Debugger allows for full-fidelity debugging of production services running on Azure.
- Snapshots can be captured at specific lines of code without halting the application.
- Integration with Application Insights provides detailed debugging information for exceptions in the production environment.
FAQ:
Q: What is the Snapshot Debugger? A: The Snapshot Debugger is a tool built into Visual Studio and Azure that allows developers to debug production services running on Azure without impacting the running application.
Q: How does the Snapshot Debugger work? A: Developers can attach the Snapshot Debugger to their Azure app service in Visual Studio. Snap points can be set in the code to capture snapshots of the application's state at specific lines. These snapshots can then be analyzed in Visual Studio.
Q: What are the benefits of using the Snapshot Debugger? A: The Snapshot Debugger provides full-fidelity debugging, cloud-scale support, role-based access control, and does not require any code changes or redeployment.
Q: Is the Snapshot Debugger available for all applications? A: The Snapshot Debugger is currently available for Visual Studio Enterprise users and is supported for ASP.NET 4.6.1 or ASP.NET Core 2.0+ applications running on Azure app services.
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