Post Deployment troubleshooting

Post Deployment troubleshooting

Overview

This article provides a structured approach to troubleshooting issues that arise after deploying applications in Azure. These steps ensure effective identification and resolution of common deployment-related challenges.

1. Verify Deployment

Steps:

1. Check Deployment Logs:

a. Navigate to the Azure Portal.

b. Access the App Service related to the deployment.

c. Go to Log Stream under the Monitoring section to review deployment logs for errors.

2. Verify Application Availability:

a. Open the application’s URL (e.g., https://<app-name>.azurewebsites.net) in a browser.

b. Ensure the application loads without errors.

3. Review Kudu Console Logs:

a. Access the Kudu console via Advanced Tools.

b. Navigate to the Debug Console and review log files in the site\wwwroot directory.

2. Common Application Issues

Symptom 1: Application Not Loading

· Cause: Incorrect or missing environment variables.

· Solution:

o Navigate to the Environment Variables section in the App Service settings.

o Review Application Settings for missing or incorrect key-value pairs (e.g., ANK_DATABASE_USERNAME, ANK_DATABASE_URL, ANK_DATABASE_PASSWORD).

o Save changes and restart the App Service.

Symptom 2: Database Connection Errors

· Cause:

o Incorrect database connection strings.

o Authentication issues.

· Solution:

o Verify database details (server name, username, password) in the Azure Database for MySQL Flexible Server.

o Ensure the corresponding environment variables in the App Service (e.g., ANK_DATABASE_USERNAME, ANK_DATABASE_URL, ANK_DATABASE_PASSWORD) match.

o Test the connection using MySQL Workbench.

Symptom 3: Application Timing Out

· Cause: Insufficient compute resources or incorrect pricing plan.

· Solution:

o Check the App Service Plan under App Service Settings.

o Upgrade to a higher tier (e.g., Standard_S2) if necessary.

3. Database Troubleshooting

Steps:

1. Test Connectivity:

a. Use MySQL Workbench to connect to the database.

b. Ensure the hostname, port (3306), username, and password are correct.

2. Check Database Configuration:

a. Note that schemas are not created automatically and must be manually initialized.

b. Use queries like SHOW DATABASES; or SELECT * FROM <table_name>; to check data.

3. Backup and Restore:

a. Data retention is set to 7 days by default for the database server.

b. If data integrity is a concern, restore from backups available in Azure’s Geo-Redundant Backup.

4. Logs and Monitoring

Enable Diagnostics Logs:

1. Do Not Enable Diagnostic Settings unless necessary, as it requires a Log Analytics Workspace.

2. Use the default monitoring options provided in the App Service.

Monitor Metrics:

1. Navigate to Metrics in the Azure Portal.

2. Add metrics like CPU Usage, Memory Usage, and HTTP Requests.

3. Identify performance bottlenecks from the graph trends.

5. Advanced Debugging

Access Kudu Console:

1. Open the App Service.

2. Navigate to Advanced Tools > Go.

3. Use the Debug Console for real-time file inspection and diagnostics.

Use Remote Debugging:

1. Enable remote debugging under App Service settings.

2. Attach your development environment (e.g., Visual Studio) to the Azure App Service.

6. Final Checklist

1. Restart Services: Ensure all services are restarted after configuration changes.

2. Update Application Code: If using frameworks like Spring Boot, ensure configurations are updated in application.yml. Confirm which profile is running to load the appropriate settings.

3. Check Active Profile: Use environment variables or application logs to confirm the active Spring profile (spring.profiles.active) and ensure it aligns with deployment requirements.

4. Clear Cache: Clear browser and application-level caches to ensure fresh deployment files are loaded.

5. Verify Security Settings:

a. Check that SSL/TLS is enforced.

b. Ensure database firewalls and IP rules are correctly configured.

By following these guidelines, you can systematically address and resolve common post-deployment issues in Azure environments.