Learning Cloud Native Go - myapp

🌱 Cloud Native Application Development is one way of speeding up the building of web applications using microservices, containers, and orchestration tools.

This repository shows how to build a Dockerized RESTful API application in Go for a simple bookshelf.

🔋 Batteries included

• The idiomatic structure based on the resource-oriented design.
• The usage of Docker, Docker compose, Alpine images, and linters on development.
• Healthcheck and CRUD API implementations with OpenAPI specifications.
• The usage of Goose for the database migrations and GORM as the database ORM.
• The usage of Zerolog as the centralized Syslog logger.
• The usage of Validator.v10 as the form validator.
• The usage of GitHub actions to run tests and linters, generate OpenAPI specifications, and build and push production images to the Docker registry.

🚀 Endpoints

Name	HTTP Method	Route
Health	GET	/livez
List Books	GET	/v1/books
Create Book	POST	/v1/books
Read Book	GET	/v1/books/{id}
Update Book	PUT	/v1/books/{id}
Delete Book	DELETE	/v1/books/{id}

💡 swaggo/swag : swag init -g cmd/api/main.go -o .swagger -ot yaml

🗄️ Database design

Column Name	Datatype	Not Null	Primary Key
id	UUID	✅	✅
title	TEXT	✅
author	TEXT	✅
published_date	DATE	✅
image_url	TEXT
description	TEXT
created_at	TIMESTAMP	✅
updated_at	TIMESTAMP	✅
deleted_at	TIMESTAMP

📦 Container image sizes

• DB: 241MB
• API
  • Development environment: 655MB
  • Production environment: 28MB ; 💡docker build -f prod.Dockerfile . -t myapp_app

📁 Project structure

myapp
├── cmd
│  ├── api
│  │  └── main.go
│  └── migrate
│     └── main.go
│
├── api
│  ├── resource
│  │  ├── book
│  │  │  ├── handler.go
│  │  │  ├── model.go
│  │  │  ├── repository.go
│  │  │  └── repository_test.go
│  │  ├── common
│  │  │  └── err
│  │  │     └── err.go
│  │  └── health
│  │     └── handler.go
│  │
│  └── router
│     ├── middleware
│     │  ├── request_id.go
│     │  ├── request_id_test.go
│     │  ├── requestlog
│     │  │  ├── handler.go
│     │  │  └── log_entry.go
│     │  ├── content_type.go
│     │  └── content_type_test.go
│     └── router.go
│
├── migrations
│  └── 00001_create_books_table.sql
│
├── config
│  └── config.go
│
├── util
│  ├── logger
│  │  └── logger.go
│  └── validator
│     └── validator.go
│
├── .env
│
├── go.mod
├── go.sum
│
├── docker-compose.yml
├── Dockerfile
│
├── prod.Dockerfile
└── k8s
   ├── app-configmap.yaml
   ├── app-secret.yaml
   ├── app-deployment.yaml
   └── app-service.yaml

📸 Form validations and logs