cli-chat

---

Chat application based on Golang microservices. Project combines various modern technologies, applying clean architecture principles.

Technologies

---

• Language: Golang 1.22
• Protocols: gRPC with TLS, gRPC gateways, HTTP
• Database: PostgreSQL
• Event Bus: Kafka
• Metrics: Prometheus, Grafana, Jaeger
• Authentication: JWT

System diagram

---

Project structure

---

Project structured as monorepository of services, that share common libraries

├── libraries            # common libraries chared by services
│   │
│   ├── api             # gRPC contracts specification with protocol buffers
│   ├── cache_client    # wrapper for redis client
│   ├── closer          # applicalion gracefull shutdown utility
│   ├── db_client       # wrapper for postgres client
│   ├── kafka           # wrappers for kafka consumer and producer
│   └── logger          # common logger (zap)
│
└── services 
    │
    ├── auth            # Service that manages users, authenctication and authorisation
    ├── auth_postgres   # DB for auth service
    ├── auth_producer   # Service with kafka producer to create random users
    │
    ├── chat_server           # Service that manages chats and messages
    ├── chat_sercer_postgres  # DB for chat_server service
    │
    ├── kafka           # Kafka deployment files
    ├── metrics         # Prometheus and Grafana deployment files
    └── tracing         # Jaeger deployment files