Chapter 27: Web App Deployment Troubleshooting

In Chapter 27, we tackle the reality of life in a high-pressure environment: things break. Even the best-designed pipelines (from Chapter 25) can fail due to configuration drift, permission issues, or code bugs. This 1-hour session is dedicated to the "Ops" in DevOps—giving you a systematic approach to troubleshooting. You will learn how to read between the lines of cryptic error logs and use Azure’s diagnostic tools to restore service quickly and confidently. In this video, we cover: Pipeline vs. Platform Errors: Learning to identify if a failure happened during the "Build" (CI), the "Deploy" (CD), or at "Runtime" within Azure. Mastering the Log Stream: Using the Azure Portal to view real-time application logs and web server logs to catch errors as they happen. Kudu Console (SCM): Going "under the hood" of Azure App Service to explore the file system, check environment variables, and run diagnostic commands. Common Deployment Killers: How to fix "403 Forbidden," "500 Internal Server Error," and the dreaded "Web App Restart" loops. App Service Diagnostics: Using the "Diagnose and Solve Problems" tool in Azure to identify SNAT port exhaustion, high CPU, or memory leaks. Standardizing the Fix: How to take a manual fix and feed it back into your YAML pipeline or Infrastructure as Code to ensure the error never happens again. This chapter turns you from a "deployer" into a "troubleshooter," a skill set that is essential when managing large-scale infrastructure under aggressive timelines. #AzureTroubleshooting #AppService #DevOpsEngineer #CloudSupport #AzureDevOps #LogAnalytics #Kudu #SiteReliability