lab2 - Containerization: Inspect, Understand, Optimize

[wyroxx]

Lab 2 — Containerization: Inspect, Understand, Optimize

Changes

• Inspected Docker images, containers, networks and service connectivity.
• Analyzed the app-gateway image layers and identified the largest layers.
• Verified Docker Compose service discovery and internal DNS.
• Tested connectivity between gateway, events, payments, Redis and PostgreSQL.
• Added .dockerignore files to all application services.
• Rebuilt the images and compared image sizes before and after optimization.
• Added a dedicated non-root app user to all application containers.
• Verified that the gateway runs as a non-root user.
• Traced a complete reserve → pay → confirm request across gateway, events and payments.