Run Nodejs Microservices in Docker Container with Postgres Database Running in Docker Container

codeonedigest cod

Solutions Architect at Publicis Sapient and passionate youtuber

Published Aug 10, 2023

In this video we will create microservices in Nodejs JavaScript running a docker container with postgres database also running in another docker container. Using Express, PG & Sequelize ORM nodejs module in this project. We will connect microservices running in a container with postgres sql database running in another docker container. I will also show step-by-step code to create microservices in JavaScript Nodejs. I will explain Sequelize ORM module in nodejs. I will also explain how to connect one docker container with other docker container. We will learn connection between microservice in a container and postgres database in another container.

** Important Nodejs Packages or Modules **

· Express - Express is a node js web application framework that provides broad features for building web and mobile applications. It is used to build a single page, multipage, and hybrid web application. It's a layer built on the top of the Node js that helps manage servers and routes.

· Sequelize - Sequelize is a Node.js-based Object Relational Mapper that makes it easy to work with MySQL, MariaDB, SQLite, PostgreSQL databases, and more.

· PG - Non-blocking PostgreSQL client for Node.js. Pure JavaScript and optional native libpq bindings.

· Body-parser - Body-parser parses an HTTP request body. Specifically in the context of a POST, PATCH, or PUT HTTP requests where the information is contained in the body. body-parser allows you to access req. Also helps in parsing the DB URLs.

· UUID - UUID is used to generate 16-byte unique value. This is used for the primary keys.

** Docker Container **

A container is an isolated environment for your code. This means that a container has no knowledge of your operating system, or your files. It runs on the environment provided to you by Docker Desktop. This is why a container usually has everything that your code needs in order to run, down to a base operating system.

** Docker File **

A Dockerfile is a text document that contains all the commands a user could call on the command line to assemble an image. This page describes the commands you can use in a Dockerfile.

** Docker Image **

Docker is used to create, run and deploy applications in containers. A Docker image contains application code, libraries, tools, dependencies and other files needed to make an application run. When a user runs an image, it can become one or many instances of a container.

** Docker HUB Repository **

Docker Hub is a hosted repository service provided by Docker for finding and sharing container images with your team.

** Topics Covered **

1. Introduction to nodejs microservice project with postgres db

2. Architecture Diagram

3. Prerequisites

4. Basic of Docker Container & Docker HUB repository

5. Download Postgre DB TAG from Docker HUB repository

6. Run Postgres DB in Docker Container

7. Understanding Packages express, Sequelize, uuid, body-parser

8. Nodejs Microservice Coding for Routes, Controller, Service, Repository, Database Models & App

9. Understanding microservice dockerfile

10. Finding IP address of Postgres database container

11. Building Docker Image of Nodejs Microservice Project

12. Running Microservice image in Docker container

13. Testing Microservice

14. Cleaning resources

15. Summary

** Chapter Timestamps **

0:00 Introduction to Nodejs JavaScript Microservices with Postgres dB

0:55 Agenda of this tutorial

2:33 Architecture Diagram explained

5:52 Prerequisite of Nodejs microservice tutorial

6:51 Basic of Docker Container & Docker HUB repository

8:01 Download Postgre DB TAG from Docker HUB repository

9:59 Run Postgres DB in Docker Container

17:36 Understanding of Nodejs modules like Express, PG, Sequelize

19:15 GIT Repository of this project

20:31 Coding Microservice in Nodejs

22:59 Coding database entity and Repository components

31:49 Coding business layer components

37:15 Coding controller components

40:01 Coding routes components

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42:22 Coding main app component

44:42 Find IP of Database Container

47:14 Understanding microservice dockerfile

50:09 Building Docker Image of Nodejs Microservice Project

52:41 Running Microservice image in Docker container

55:27 Testing Microservices end points

01:04:36 Stopping the docker containers

01:06:16 Summary of Nodejs microservice with postgres db

#nodejs #microservices #Postgresdb

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