Infrastructure Monitor (VPS)

The application will monitor:

• VPS CPU
• RAM
• Disk
• Docker containers status
• Microservices health
• Trigger alerts when something goes wrong

1. Project structure

v1.0.1

• 1.1 Overview
• 1.2 Multi-module project structure
• 1.3 Gradle multi-module settings
• 1.4 Minimal application.yml files

2. Metrics service

v1.0.2

• 2.1 Package structure
• 2.2 Health endpoint config
• 2.3 Request Examples
• 2.4 Test endpoints
• 2.5 Minimal integration test

3. MongoDB on metrics-service

v1.0.3

• 3.1 Dependency Injection (DI)
• 3.2 MongoDB dependency
• 3.3 Mondo document
• 3.4 Repository
• 3.5 Metrics injestion service
• 3.6 MongoDB connection
• 3.7 Docker Compose for metric-service + MongoDB
• 3.8 Dockerfile
• 3.9 Test it

4. Integration test

v1.0.4

• 4.1 Make the service a bit more useful
• 4.2 Exception handler
• 4.3 Integration test agains MongoDB
• 4.4 Manual test flow

5. Event publishing with RabbitMQ

v1.0.5

• 5.1 RabbitMQ dependency
• 5.2 Event contract (common-events) + Beans (note)
• 5.4 Event publisher
• 5.5 Publish after saving to MongoDB
• 5.6 RabbitMQ properties
• 5.7 Update Docker Compose
• 5.8 Quick publisher test
• 5.9 Manual test
• 5.10 Verify the message reached RabbitMQ

6. Alert service

v1.0.6

• 6.1 What alert-service does
• 6.2 Package structure
• 6.3 Gradle build settings
• 6.4 Main application class
• 6.5 RabbitMQ config for alert-service
• 6.6 Domain model (alert)
• 6.7 API response DTO
• 6.8 In-memory repository
• 6.9 Alert evaluation service
• 6.10 RabbitMQ listener
• 6.11 REST controller to inspect alerts
• 6.12 application.yml
• 6.13 docker-compose.yml
• 6.14 Dockerfile
• 6.15 Manual test

7. Dashboard service

v1.0.7

• 7.1 What dashboard-service will do
• 7.2 Why projections matter
• 7.3 Event contracts
• 7.4 Package structure
• 7.5 Gradle build settings
• 7.6 Main application class
• 7.7 RabbitMQ config
• 7.8 Read model classes
• 7.9 In-memory projection repository
• 7.10 Projection update service
• 7.11 RabbitMQ listeners
• 7.12 REST controller
• 7.13 Service application.yml
• 7.15 Docker Compose
• 7.16 Dockerfile
• 7.17 Manual test flow

8. Node agent

v1.0.8

• 8.1 What node-agent will send
• 8.2 Shared metric type enum
• 8.3 Gradle build
• 8.4 Package structure
• 8.5 Main application class
• 8.6 Configuration properties
• 8.7 HTTP client to send metrics
• 8.8 System metrics collector
• 8.9 Docker metrics collector
• 8.10 Service health collector
• 8.11 Scheduler that orchestrates collection
• 8.12 Node-agent application.yml
• 8.13 Manual test flow
• 8.14 Cleanup strategy
• 8.15 Separate service for node-agent
• 8.16 Run it directly (no Gradle)
• 8.17 Logs on VPS

9. Vue UI

v1.0.9

• 9.1 Static HTML page
• 9.2 Port clarification
• 9.3 Test the page

10. VPS deployment

v1.0.10

• 10.1 Spring Security to dashboard-service
• 10.2 Add username/password to properties
• 10.3 Create a properties class for the login config
• 10.4 Create the Spring Security configuration
• 10.5 Keep only dashboar public
• 10.6 Rebuild and restart the project
• 10.7 Clone project on the VPS

Microservices Architecture

Screeshots