Spring Apps To Aca

Overview

This migration enables you to move existing Spring Boot applications from Azure Spring Apps (or any platform) to Azure Container Apps with minimal code changes.

Migration Scenarios

Service Mapping

Pre-Migration Assessment

Assess your Spring Boot application for migration readiness:

• Local State: Check for in-memory sessions, singletons, file-based state → spring-assessment-guide.md
• File System: Identify file writes, temp files, shared storage needs → spring-assessment-guide.md
• Platform Compatibility: Verify Java 17+, Spring Boot 3.x support → spring-assessment-guide.md
• External Resources: Inventory databases, message brokers, caches → spring-assessment-guide.md

Migration Workflow

1. Assess — Analyze application for migration readiness

   Present findings and complexity rating to user. Ask: “Assessment complete — proceed with containerization?”

2. Containerize — Create Dockerfile, build image, push to ACR
3. Provision — Create Container Apps environment, configure logging
4. Deploy — Deploy container to Azure Container Apps
5. Optimize — Add Spring Cloud components (Config, Eureka, Gateway)

See spring-deployment-guide.md for detailed phase-by-phase instructions.

Key Differences from Azure Spring Apps

Best Practices

• Use managed identity for Azure resource access (no connection strings)
• Store secrets in Azure Key Vault, reference via environment variables
• Use Application Insights for observability
• Enable Log Analytics for centralized logging
• Use Azure Files for persistent storage if needed

Next Steps After Migration

After successful migration:

1. Configure Spring Cloud components (optional)
2. Set up CI/CD pipeline with GitHub Actions / Azure DevOps
3. Configure custom domains and SSL certificates
4. Implement autoscaling rules
5. Hand off to azure-prepare for infrastructure optimization