Pradeep Kumar C Support Escalation Engineer Windows Azure Diagnostics Logging and Monitoring in the Cloud

WAD overview & Architecture

Reason for Diagnostics in Azure 1. Save diagnostic data that would be lost during a reimaging of the instance (an Azure Cloud Service is stateless) 2. Provide a central repository for diagnostics from multiple role instances Diagnostic Strategy Spend time considering a diagnostic strategy for your Azure application i.e. do want to record, errors, deployment status, monitor performance How will diagnostics setting be changed once deployed? Consider cost of logging, both performance wise and financially How will you access diagnostic information?

SDK Component provides distributed monitoring & data Collection Supports standard diagnostic APIs Cloud – Friendly Manage Multiple role instances centrally Scalable Build on Windows Azure Storage & used by scale-out/Scale-in Windows Azure Platform feature Developer in control What to Collect & When to collect

How to Enable WAD

Enable Programmatically : using DiagnosticMonitor.Start() Enable Diagnostic with : Configuration (diagnostic.wadcfg) Enable Diagnostic with Windows Azure SDK 2.0 via Visual Studio

<DiagnosticInfrastructureLogs bufferQuotaInMB="512" scheduledTransferLogLevelFilter="Verbose" scheduledTransferPeriod="PT1S" /> <Logs bufferQuotaInMB="1024" scheduledTransferLogLevelFilter="Verbose" scheduledTransferPeriod="PT1S" /> <WindowsEventLog bufferQuotaInMB="512" scheduledTransferLogLevelFilter="Verbose" scheduledTransferPeriod="PT5M">

How Does It Work (in a nutshell)? Role Instance Starts Diagnostic Monitor Starts Monitor is configured Imperatively at Start time Remotely any time via configuration file Configuration is saved in Storage Monitor buffers data locally User can set a quota (FIFO) Initiates transfer to Azure storage from local buffer

D E M O

Storage Considerations

Set up a separate Diagnostic Storage account Choose only required Diagnostic data Use an affinity group Periodically copy and clear the Diagnostic Data from Storage Be aware of cost of logging, both physical and bandwidth

Common Diagnostic Tasks

Monitoring application performance CPU and memory usage Requests to application Troubleshooting and Debugging issues Errors or exceptions in code Capacity planning Identify need for more compute resource

Remote Configuration

D E M O

Issues & Troubleshooting

Scenario Logs no longer or never copied to Azure Storage Could be all logs configured Specific logs All instances of a role or specific ones

Troubleshooting steps Check WAD configuration RDP onto instance to check WAD processes Locally check WAD configuration Ensure logs actually exist Raise a support case

Questions Visit CIE Blog, Join the Webinar - Windows Azure Diagnostics - Logging and Monitoring in the Cloud on August 6th at 3PM IST (UTC +5:30)Join the Webinar - Windows Azure Diagnostics - Logging and Monitoring in the Cloud on August 6th at 3PM IST (UTC +5:30)

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