cloudnative-bookstore-microservices-go

README

CloudNative-Book-Store-Micro-Service-Rest-API

Micro Service based Http Book Store Rest API built using Cloud Native Stack ( GO LANG | DOCKER | KUBERNETES)

Introduction

This project is part of course Getting Started with Cloud Native Go

Taught By : Leander Reimer (Packt Publishing)

Goal

• The goal is to build Micro Service based Http Book Store Rest API , containerize it using Docker and finally orchestrate using Kubernetes

• The project was developed using GO LANG | DOCKER | KUBERNETES

Approach:

Using Go internal libraries developed a HTTP server

Json marshaling and unmarshaling of books

book rest api

containerize it using docker work flow

making use of docker compose to compose micro service with few other containers.

orchestrate go micro service by scaling it horizantallly using kubernetes

finally did rolling upgrade of go micro service

Architecture

Technology stack

Area	Technology
Programming Languages Used	Go lang
Micro Service Containerization	Docker
Micro Service Orchestration	Kubernetes

Prerequisites

In order to build and run this showcase you need to have a couple of things installed:

The Go SDK (e.g. using Brew)

An IDE for the development, like Visual Studio Code or IntelliJ

The Docker Toolbox or native Docker, whatever you prefer

Execution Instructions

Building the Go microservices

$ go build

$ ./Cloud-Native-Go.exe

Containerization with Docker

$ docker build -t cloud-native-go:1.0.1 . $ docker images $ docker tag cloud-native-go:1.0.1 lreimer/cloud-native-go:1.0.1 $ docker push lreimer/cloud-native-go:1.0.1

Running Docker image locally

$ docker run -it -p 8080:8080 cloud-native-go:1.0.1 $ docker run -it -e "PORT=9090" -p 9090:9090 cloud-native-go:1.0.1 $ docker ps --all

$ docker run --name=cloud-native-go -d -p 8080:8080 cloud-native-go:1.0.1 $ docker ps $ docker stats $ docker stop $ docker start

Improved Containerization with Docker

$ GOOS=linux GOARCH=amd64 go build $ docker build -t cloud-native-go:1.0.1-alpine . $ docker images $ docker tag cloud-native-go:1.0.1-alpine lreimer/cloud-native-go:1.0.1-alpine $ docker push lreimer/cloud-native-go:1.0.1-alpine

Docker Compose

$ docker-compose build $ docker images $ docker-compose up -d $ docker-compose kill $ docker-compose rm

Kubernetes and Pods

$ kubectl get pods $ kubectl create -f k8s-pod.yml $ kubectl get pods $ kubectl describe pod cloud-native-go

$ kubectl port-forward cloud-native-go 8080:8080

$ kubectl get pods --show-labels $ kubectl get pods -o wide -L env $ kubectl label pod cloud-native-go hello=world $ kubectl get pods -o wide -L hello $ kubectl label pod cloud-native-go env=prod --overwrite $ kubectl get pods -o wide -L env

$ kubectl get ns $ kubectl get pods --namespace kube-system $ kubectl create -f k8s-namespace.yml $ kubectl get ns $ kubectl create -f k8s-pod.yml --namespace cloud-native-go

$ kubectl delete -f k8s-pod.yml

Kubernetes Deployments and Services

$ kubectl get services,deployments,pods

$ kubectl create -f k8s-deployment.yml $ kubectl get deployments,pods

$ kubectl apply -f k8s-deployment.yml

$ kubectl create -f k8s-service.yml $ kubectl get services $ kubectl describe service cloud-native-go

$ kubectl delete -f k8s-deployment.yml $ kubectl delete -f k8s-service.yml

Kubernetes Scaling and Rolling Updates

$ kubectl create -f k8s-deployment.yml --record=true

$ kubectl scale deployment cloud-native-go --replicas=5 $ kubectl scale deployment cloud-native-go --replicas=3

$ kubectl rollout history deployment cloud-native-go

$ kubectl apply -f k8s-deployment.yml

$ kubectl edit deployment cloud-native-go

$ kubectl set image deployment cloud-native-go cloud-native-go=cloud-native-go:1.0.2

$ kubectl rollout history deployment cloud-native-go $ kubectl rollout undo deployment cloud-native-go --to-revision=0

$ kubectl delete -f k8s-deployment.yml

Screen shots

Get by ISBN

Get All books

Create Book

Update book

Delete a book