type: concept tags:

devops
kubernetes
kubernetes ingress
ingress
application
application flow diagram
flow
diagram timestamp: ‘2025-09-01T12:47:50Z’ —# Application High-Level Design (HLD) Diagram

The system consists of distinct microservices/applications (UI, Auth, Report, ShortURL) and a shared database (DB). The diagram visually reflects data and control flows, service boundaries, and integration points.

Application HLD Diagram

Application HLD

Components

Component	Description
`USER`	End user interacting with the front end.
`UI ("/")`	The primary user interface, serving as the entry point for all user actions.
`AUTH`	Handles authentication, database validation, and authorization checks.
`REPORT`	Manages report generation and data retrieval.
`HOME`	Landing/dashboard logic after login.
`SHORTURL`	Provides URL shortening functionality.
`UI_SHORT`	User interface for the short URL service.
`DB`	Central MySQL database for persistent storage.

High-Level Flow

The USER interacts with the UI (“/”).
UI sends user credentials/data to AUTH.
AUTH communicates with DB for authentication and retrieves required information.
After authentication:
- Users are redirected to HOME.
- Users can access REPORT or SHORTURL services.
REPORT fetches data from DB and returns reports to the user via AUTH.
SHORTURL service (after passing through AUTH) connects users to UI_SHORT.
UI_SHORT interacts with the DB for URL mapping data.