├── .gitignore ├── LICENSE ├── README.md ├── auth ├── Dockerfile ├── database.js ├── index.js ├── package-lock.json ├── package.json └── user.model.js ├── deploy.sh ├── kubernetes ├── auth.yaml ├── orders.yaml ├── postgresql.yaml ├── products.yaml └── rabbitmq.yaml ├── orders ├── Dockerfile ├── database.js ├── index.js ├── isAuthenticated.js ├── order.model.js ├── package-lock.json └── package.json ├── package.json └── products ├── Dockerfile ├── database.js ├── index.js ├── isAuthenticated.js ├── package-lock.json ├── package.json └── product.model.js /.gitignore: -------------------------------------------------------------------------------- 1 | # System file 2 | .DS_Store 3 | 4 | # Logs 5 | logs 6 | *.log 7 | npm-debug.log* 8 | yarn-debug.log* 9 | yarn-error.log* 10 | lerna-debug.log* 11 | 12 | # Diagnostic reports (https://nodejs.org/api/report.html) 13 | report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json 14 | 15 | # Runtime data 16 | pids 17 | *.pid 18 | *.seed 19 | *.pid.lock 20 | 21 | # Directory for instrumented libs generated by jscoverage/JSCover 22 | lib-cov 23 | 24 | # Coverage directory used by tools like istanbul 25 | coverage 26 | *.lcov 27 | 28 | # nyc test coverage 29 | .nyc_output 30 | 31 | # Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files) 32 | .grunt 33 | 34 | # Bower dependency directory (https://bower.io/) 35 | bower_components 36 | 37 | # node-waf configuration 38 | .lock-wscript 39 | 40 | # Compiled binary addons (https://nodejs.org/api/addons.html) 41 | build/Release 42 | 43 | # Dependency directories 44 | node_modules/ 45 | jspm_packages/ 46 | 47 | # TypeScript v1 declaration files 48 | typings/ 49 | 50 | # TypeScript cache 51 | *.tsbuildinfo 52 | 53 | # Optional npm cache directory 54 | .npm 55 | 56 | # Optional eslint cache 57 | .eslintcache 58 | 59 | # Microbundle cache 60 | .rpt2_cache/ 61 | .rts2_cache_cjs/ 62 | .rts2_cache_es/ 63 | .rts2_cache_umd/ 64 | 65 | # Optional REPL history 66 | .node_repl_history 67 | 68 | # Output of 'npm pack' 69 | *.tgz 70 | 71 | # Yarn Integrity file 72 | .yarn-integrity 73 | 74 | # dotenv environment variables file 75 | .env 76 | .env.test 77 | 78 | # parcel-bundler cache (https://parceljs.org/) 79 | .cache 80 | 81 | # Next.js build output 82 | .next 83 | 84 | # Nuxt.js build / generate output 85 | .nuxt 86 | dist 87 | 88 | # Gatsby files 89 | .cache/ 90 | # Comment in the public line in if your project uses Gatsby and *not* Next.js 91 | # https://nextjs.org/blog/next-9-1#public-directory-support 92 | # public 93 | 94 | # vuepress build output 95 | .vuepress/dist 96 | 97 | # Serverless directories 98 | .serverless/ 99 | 100 | # FuseBox cache 101 | .fusebox/ 102 | 103 | # DynamoDB Local files 104 | .dynamodb/ 105 | 106 | # TernJS port file 107 | .tern-port 108 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT 593 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY 594 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, 595 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 596 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM 597 | IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF 598 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 599 | 600 | 16. Limitation of Liability. 601 | 602 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 603 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 604 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 605 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 606 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 607 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 608 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 609 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 610 | SUCH DAMAGES. 611 | 612 | 17. Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # nodejs-kubernetes-microservices 2 | Sample Node.js project to show how to create node apps with microservices architecture with Kubernetes. 3 | -------------------------------------------------------------------------------- /auth/Dockerfile: -------------------------------------------------------------------------------- 1 | # FROM node:14-slim also works here 2 | FROM node:14-alpine as base 3 | 4 | # install curl for debugging 5 | RUN apk add curl 6 | 7 | # set our node environment, either development or production 8 | # defaults to production, compose overrides this to development on build and run 9 | ARG NODE_ENV=production 10 | ENV NODE_ENV $NODE_ENV 11 | 12 | # default to port 3000 for node 13 | ARG PORT=3000 14 | ENV PORT $PORT 15 | EXPOSE $PORT 16 | 17 | # you'll likely want the latest npm, regardless of node version, for speed and fixes 18 | # but pin this version for the best stability 19 | RUN npm i npm@latest -g 20 | 21 | # install dependencies first 22 | # we have to create the dir with root and change perms 23 | RUN mkdir app && chown node:node app 24 | WORKDIR /app 25 | # the official node image provides an unprivileged user as a security best practice 26 | # but we have to manually enable it. We put it here so npm installs dependencies as the same 27 | # user who runs the app. 28 | 29 | USER node 30 | COPY --chown=node:node package.json package-lock.json* ./ 31 | RUN npm install --no-optional && npm cache clean --force 32 | ENV PATH app/node_modules/.bin:$PATH 33 | 34 | 35 | # a dev and build-only stage. we don't need to 36 | # copy in code since we bind-mount it 37 | FROM base as dev 38 | ENV NODE_ENV=development 39 | RUN npm install --only=development 40 | # We use "npm start" here in development and node in production 41 | CMD ["npm", "start"] 42 | 43 | 44 | FROM dev as test 45 | # copy in our source code last, as it changes the most 46 | # copy in as node user, so permissions match what we need 47 | COPY --chown=node:node . . 48 | CMD ["npm", "test"] 49 | # you would also run your tests here 50 | 51 | 52 | # this only has minimal deps and files 53 | FROM base as prod 54 | # copy in as node user, so permissions match what we need 55 | COPY --chown=node:node . . 56 | # check every 30s to ensure this service returns HTTP 200 57 | HEALTHCHECK --interval=600s CMD node ./src/healthcheck.js 58 | CMD ["node", "./index.js"] -------------------------------------------------------------------------------- /auth/database.js: -------------------------------------------------------------------------------- 1 | const { Sequelize } = require('sequelize'); 2 | 3 | const sequelize = new Sequelize(process.env.POSTGRES_URL, { 4 | dialect: 'postgres', 5 | logging: false, 6 | }); 7 | 8 | sequelize 9 | .authenticate() 10 | .then(() => console.log('Connection has been established successfully.')) 11 | .catch(error => { 12 | console.error('Unable to connect to the database:', error); 13 | process.exit(1); 14 | }); 15 | 16 | module.exports = sequelize; 17 | -------------------------------------------------------------------------------- /auth/index.js: -------------------------------------------------------------------------------- 1 | const express = require('express'); 2 | require('express-async-errors'); 3 | const sequelize = require('./database'); 4 | const bcrypt = require('bcryptjs'); 5 | const jwt = require('jsonwebtoken'); 6 | const User = require('./user.model'); 7 | 8 | const app = express(); 9 | 10 | app.use(express.json()); 11 | 12 | const port = +process.env.PORT ?? 3001; 13 | 14 | app.listen(port, () => { 15 | console.log(`Users Service at ${port}`); 16 | }); 17 | 18 | app.post('/signup', async (req, res) => { 19 | let { name, email, password } = req.body; 20 | password = await bcrypt.hash(password, 12); 21 | 22 | await User.create({ name, email, password }); 23 | const payload = { 24 | email, 25 | name, 26 | }; 27 | jwt.sign(payload, process.env.JWT_SECRET, (err, token) => { 28 | if (err) console.log(err); 29 | res.status(200).json({ token, name, email }); 30 | }); 31 | }); 32 | 33 | app.post('/signin', async (req, res) => { 34 | let { email, password } = req.body; 35 | 36 | const user = await User.findOne({ where: { email } }); 37 | if (!user) { 38 | return res.status(404).json({ error: 'User not found' }); 39 | } 40 | if (await bcrypt.compare(password, user.password)) { 41 | const payload = { 42 | email: user.email, 43 | name: user.name, 44 | }; 45 | jwt.sign(payload, process.env.JWT_SECRET, (err, token) => { 46 | if (err) console.log(err); 47 | res.status(200).json({ token, name: user.name, email }); 48 | }); 49 | } else { 50 | res.status(401).json({ error: 'Unauthorized' }); 51 | } 52 | }); 53 | 54 | sequelize.sync(); 55 | -------------------------------------------------------------------------------- /auth/package.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "auth", 3 | "version": "1.0.0", 4 | "description": "", 5 | "main": "index.js", 6 | "scripts": { 7 | "start": "nodemon ./index.js", 8 | "test": "echo \"Error: no test specified\" && exit 1" 9 | }, 10 | "keywords": [], 11 | "author": "", 12 | "license": "ISC", 13 | "dependencies": { 14 | "amqplib": "^0.8.0", 15 | "bcryptjs": "^2.4.3", 16 | "express": "^4.18.0", 17 | "express-async-errors": "^3.1.1", 18 | "jsonwebtoken": "^8.5.1", 19 | "pg": "^8.7.3", 20 | "pg-hstore": "^2.3.4", 21 | "sequelize": "^6.19.0" 22 | }, 23 | "devDependencies": { 24 | "nodemon": "^2.0.15" 25 | } 26 | } 27 | -------------------------------------------------------------------------------- /auth/user.model.js: -------------------------------------------------------------------------------- 1 | const { Sequelize, Model, DataTypes } = require('sequelize'); 2 | const sequelize = require('./database'); 3 | 4 | const User = sequelize.define('User', { 5 | name: { 6 | type: DataTypes.STRING, 7 | allowNull: false, 8 | primaryKey: true, 9 | }, 10 | email: { 11 | type: DataTypes.STRING, 12 | allowNull: false, 13 | }, 14 | password: { 15 | type: DataTypes.STRING, 16 | allowNull: false, 17 | }, 18 | }); 19 | 20 | module.exports = User; 21 | -------------------------------------------------------------------------------- /deploy.sh: -------------------------------------------------------------------------------- 1 | foreach SERVICE ( auth products orders ) 2 | cd $SERVICE 3 | docker build -t arjanaswal/node-kubernetes-$SERVICE-service . 4 | docker push arjanaswal/node-kubernetes-$SERVICE-service 5 | cd .. 6 | end 7 | 8 | kubectl delete -f kubernetes 9 | kubectl apply -f kubernetes -------------------------------------------------------------------------------- /kubernetes/auth.yaml: -------------------------------------------------------------------------------- 1 | apiVersion: v1 2 | kind: Service 3 | metadata: 4 | name: auth-service 5 | spec: 6 | selector: 7 | app: auth 8 | type: ClusterIP 9 | ports: 10 | - protocol: TCP 11 | port: 3001 12 | targetPort: 3001 13 | --- 14 | apiVersion: apps/v1 15 | kind: Deployment 16 | metadata: 17 | name: auth-deployment 18 | spec: 19 | replicas: 1 20 | selector: 21 | matchLabels: 22 | app: auth 23 | template: 24 | metadata: 25 | labels: 26 | app: auth 27 | spec: 28 | containers: 29 | - name: auth-api 30 | image: arjanaswal/node-kubernetes-auth-service:latest 31 | resources: 32 | limits: 33 | cpu: 100m 34 | memory: 100Mi 35 | requests: 36 | cpu: 100m 37 | memory: 100Mi 38 | env: 39 | - name: SERVICE 40 | value: 'auth' 41 | - name: NODE_ENV 42 | value: 'development' 43 | - name: PORT 44 | value: '3001' 45 | - name: JWT_SECRET 46 | value: 'secret' 47 | - name: POSTGRES_URL 48 | value: postgres://postgres:postgres@postgresql-service.default:5432/postgres 49 | -------------------------------------------------------------------------------- /kubernetes/orders.yaml: -------------------------------------------------------------------------------- 1 | apiVersion: v1 2 | kind: Service 3 | metadata: 4 | name: orders-service 5 | spec: 6 | selector: 7 | app: orders 8 | type: ClusterIP 9 | ports: 10 | - protocol: TCP 11 | port: 3003 12 | targetPort: 3003 13 | --- 14 | apiVersion: apps/v1 15 | kind: Deployment 16 | metadata: 17 | name: orders-deployment 18 | spec: 19 | replicas: 1 20 | selector: 21 | matchLabels: 22 | app: orders 23 | template: 24 | metadata: 25 | labels: 26 | app: orders 27 | spec: 28 | containers: 29 | - name: orders-api 30 | image: arjanaswal/node-kubernetes-orders-service:latest 31 | resources: 32 | limits: 33 | cpu: 100m 34 | memory: 100Mi 35 | requests: 36 | cpu: 100m 37 | memory: 100Mi 38 | env: 39 | - name: SERVICE 40 | value: 'orders' 41 | - name: NODE_ENV 42 | value: 'development' 43 | - name: PORT 44 | value: '3003' 45 | - name: JWT_SECRET 46 | value: 'secret' 47 | - name: POSTGRES_URL 48 | value: postgres://postgres:postgres@postgresql-service.default:5432/postgres 49 | - name: RABBITMQ_URL 50 | value: amqp://guest:guest@rabbitmq-service.default:5672 51 | -------------------------------------------------------------------------------- /kubernetes/postgresql.yaml: -------------------------------------------------------------------------------- 1 | apiVersion: v1 2 | kind: Service 3 | metadata: 4 | name: postgresql-service 5 | spec: 6 | selector: 7 | app: postgresql 8 | type: ClusterIP 9 | ports: 10 | - protocol: TCP 11 | port: 5432 12 | targetPort: 5432 13 | --- 14 | apiVersion: apps/v1 15 | kind: Deployment 16 | metadata: 17 | name: postgresql-deployment 18 | spec: 19 | replicas: 1 20 | selector: 21 | matchLabels: 22 | app: postgresql 23 | template: 24 | metadata: 25 | labels: 26 | app: postgresql 27 | spec: 28 | containers: 29 | - name: postgresql 30 | image: postgres:14-alpine 31 | env: 32 | - name: POSTGRES_USER 33 | value: postgres 34 | - name: POSTGRES_PASSWORD 35 | value: postgres 36 | - name: POSTGRES_DB 37 | value: postgres 38 | resources: 39 | limits: 40 | cpu: 100m 41 | memory: 100Mi 42 | requests: 43 | cpu: 100m 44 | memory: 100Mi 45 | -------------------------------------------------------------------------------- /kubernetes/products.yaml: -------------------------------------------------------------------------------- 1 | apiVersion: v1 2 | kind: Service 3 | metadata: 4 | name: products-service 5 | spec: 6 | selector: 7 | app: products 8 | type: ClusterIP 9 | ports: 10 | - protocol: TCP 11 | port: 3002 12 | targetPort: 3002 13 | --- 14 | apiVersion: apps/v1 15 | kind: Deployment 16 | metadata: 17 | name: products-deployment 18 | spec: 19 | replicas: 1 20 | selector: 21 | matchLabels: 22 | app: products 23 | template: 24 | metadata: 25 | labels: 26 | app: products 27 | spec: 28 | containers: 29 | - name: products-api 30 | image: arjanaswal/node-kubernetes-products-service:latest 31 | resources: 32 | limits: 33 | cpu: 100m 34 | memory: 100Mi 35 | requests: 36 | cpu: 100m 37 | memory: 100Mi 38 | env: 39 | - name: SERVICE 40 | value: 'products' 41 | - name: NODE_ENV 42 | value: 'development' 43 | - name: PORT 44 | value: '3002' 45 | - name: JWT_SECRET 46 | value: 'secret' 47 | - name: POSTGRES_URL 48 | value: postgres://postgres:postgres@postgresql-service.default:5432/postgres 49 | - name: RABBITMQ_URL 50 | value: amqp://guest:guest@rabbitmq-service.default:5672 51 | -------------------------------------------------------------------------------- /kubernetes/rabbitmq.yaml: -------------------------------------------------------------------------------- 1 | apiVersion: v1 2 | kind: Service 3 | metadata: 4 | name: rabbitmq-service 5 | spec: 6 | selector: 7 | app: rabbitmq 8 | type: ClusterIP 9 | ports: 10 | - protocol: TCP 11 | port: 5672 12 | targetPort: 5672 13 | name: rabbitmq 14 | - protocol: TCP 15 | port: 15672 16 | targetPort: 15672 17 | name: rabbitmq-admin 18 | --- 19 | apiVersion: apps/v1 20 | kind: Deployment 21 | metadata: 22 | name: rabbitmq-deployment 23 | spec: 24 | replicas: 1 25 | selector: 26 | matchLabels: 27 | app: rabbitmq 28 | template: 29 | metadata: 30 | labels: 31 | app: rabbitmq 32 | spec: 33 | containers: 34 | - name: rabbitmq 35 | image: rabbitmq:3.10-rc-management-alpine 36 | resources: 37 | limits: 38 | cpu: 100m 39 | memory: 100Mi 40 | requests: 41 | cpu: 100m 42 | memory: 100Mi 43 | -------------------------------------------------------------------------------- /orders/Dockerfile: -------------------------------------------------------------------------------- 1 | # FROM node:14-slim also works here 2 | FROM node:14-alpine as base 3 | 4 | # install curl for debugging 5 | RUN apk add curl 6 | 7 | # set our node environment, either development or production 8 | # defaults to production, compose overrides this to development on build and run 9 | ARG NODE_ENV=production 10 | ENV NODE_ENV $NODE_ENV 11 | 12 | # default to port 3000 for node 13 | ARG PORT=3000 14 | ENV PORT $PORT 15 | EXPOSE $PORT 16 | 17 | # you'll likely want the latest npm, regardless of node version, for speed and fixes 18 | # but pin this version for the best stability 19 | RUN npm i npm@latest -g 20 | 21 | # install dependencies first 22 | # we have to create the dir with root and change perms 23 | RUN mkdir app && chown node:node app 24 | WORKDIR /app 25 | # the official node image provides an unprivileged user as a security best practice 26 | # but we have to manually enable it. We put it here so npm installs dependencies as the same 27 | # user who runs the app. 28 | 29 | USER node 30 | COPY --chown=node:node package.json package-lock.json* ./ 31 | RUN npm install --no-optional && npm cache clean --force 32 | ENV PATH app/node_modules/.bin:$PATH 33 | 34 | 35 | # a dev and build-only stage. we don't need to 36 | # copy in code since we bind-mount it 37 | FROM base as dev 38 | ENV NODE_ENV=development 39 | RUN npm install --only=development 40 | # We use "npm start" here in development and node in production 41 | CMD ["npm", "start"] 42 | 43 | 44 | FROM dev as test 45 | # copy in our source code last, as it changes the most 46 | # copy in as node user, so permissions match what we need 47 | COPY --chown=node:node . . 48 | CMD ["npm", "test"] 49 | # you would also run your tests here 50 | 51 | 52 | # this only has minimal deps and files 53 | FROM base as prod 54 | # copy in as node user, so permissions match what we need 55 | COPY --chown=node:node . . 56 | # check every 30s to ensure this service returns HTTP 200 57 | HEALTHCHECK --interval=600s CMD node ./src/healthcheck.js 58 | CMD ["node", "./index.js"] -------------------------------------------------------------------------------- /orders/database.js: -------------------------------------------------------------------------------- 1 | const { Sequelize } = require('sequelize'); 2 | 3 | const sequelize = new Sequelize(process.env.POSTGRES_URL, { 4 | dialect: 'postgres', 5 | logging: false, 6 | }); 7 | 8 | sequelize 9 | .authenticate() 10 | .then(() => console.log('Connection has been established successfully.')) 11 | .catch(error => { 12 | console.error('Unable to connect to the database:', error); 13 | process.exit(1); 14 | }); 15 | 16 | module.exports = sequelize; 17 | -------------------------------------------------------------------------------- /orders/index.js: -------------------------------------------------------------------------------- 1 | const express = require('express'); 2 | require('express-async-errors'); 3 | const sequelize = require('./database'); 4 | const isAuthenticated = require('./isAuthenticated'); 5 | const Order = require('./order.model.js'); 6 | const amqp = require('amqplib'); 7 | 8 | let channel; 9 | 10 | async function createOrder(products, userEmail) { 11 | let total = 0; 12 | for (let t = 0; t < products.length; ++t) { 13 | total += +products[t].price; 14 | } 15 | 16 | products = products.map(product => { 17 | return product.id; 18 | }); 19 | 20 | const newOrder = await Order.create({ 21 | products, 22 | creator: userEmail, 23 | totalPrice: total, 24 | }); 25 | 26 | return newOrder; 27 | } 28 | 29 | async function connect() { 30 | const amqpServer = process.env.RABBITMQ_URL; 31 | const connection = await amqp.connect(amqpServer); 32 | channel = await connection.createChannel(); 33 | await channel.assertQueue('ORDER'); 34 | } 35 | 36 | connect() 37 | .then(() => { 38 | channel.consume('ORDER', data => { 39 | console.log('Consuming ORDER service'); 40 | const { products, userEmail } = JSON.parse(data.content); 41 | createOrder(products, userEmail) 42 | .then(newOrder => { 43 | channel.ack(data); 44 | channel.sendToQueue( 45 | 'PRODUCT', 46 | Buffer.from(JSON.stringify({ newOrder })) 47 | ); 48 | }) 49 | .catch(err => { 50 | console.log(err); 51 | }); 52 | }); 53 | }) 54 | .catch(error => { 55 | console.error('Unable to connect to the Rabbit MQ:', error); 56 | process.exit(1); 57 | }); 58 | 59 | const app = express(); 60 | 61 | app.use(express.json()); 62 | 63 | const port = +process.env.PORT ?? 3003; 64 | 65 | app.listen(port, () => { 66 | console.log(`Orders Service at ${port}`); 67 | }); 68 | 69 | app.get('/orders', async (req, res) => { 70 | const results = await Order.findAll(); 71 | 72 | res.status(200).json(results); 73 | }); 74 | 75 | sequelize.sync(); 76 | -------------------------------------------------------------------------------- /orders/isAuthenticated.js: -------------------------------------------------------------------------------- 1 | const jwt = require('jsonwebtoken'); 2 | 3 | module.exports = async function isAuthenticated(req, res, next) { 4 | const token = req.headers['authorization']?.split(' ')[1]; 5 | 6 | jwt.verify(token, process.env.JWT_SECRET, (err, user) => { 7 | if (err) { 8 | return res.status(401).json({ message: err }); 9 | } else { 10 | req.user = user; 11 | next(); 12 | } 13 | }); 14 | }; 15 | -------------------------------------------------------------------------------- /orders/order.model.js: -------------------------------------------------------------------------------- 1 | const { Sequelize, Model, DataTypes } = require('sequelize'); 2 | const sequelize = require('./database'); 3 | 4 | const Order = sequelize.define('Order', { 5 | id: { 6 | type: DataTypes.INTEGER, 7 | primaryKey: true, 8 | autoIncrement: true, 9 | }, 10 | products: { 11 | type: DataTypes.ARRAY(DataTypes.INTEGER), 12 | allowNull: false, 13 | }, 14 | totalPrice: { 15 | type: DataTypes.DECIMAL(10, 2), 16 | allowNull: false, 17 | }, 18 | creator: { 19 | type: DataTypes.STRING, 20 | allowNull: false, 21 | }, 22 | }); 23 | 24 | module.exports = Order; 25 | -------------------------------------------------------------------------------- /orders/package.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "orders", 3 | "version": "1.0.0", 4 | "description": "", 5 | "main": "index.js", 6 | "scripts": { 7 | "start": "nodemon ./index.js", 8 | "test": "echo \"Error: no test specified\" && exit 1" 9 | }, 10 | "keywords": [], 11 | "author": "", 12 | "license": "ISC", 13 | "devDependencies": { 14 | "nodemon": "^2.0.15" 15 | }, 16 | "dependencies": { 17 | "amqplib": "^0.8.0", 18 | "express": "^4.18.0", 19 | "express-async-errors": "^3.1.1", 20 | "jsonwebtoken": "^8.5.1", 21 | "pg": "^8.7.3", 22 | "pg-hstore": "^2.3.4", 23 | "sequelize": "^6.19.0" 24 | } 25 | } 26 | -------------------------------------------------------------------------------- /package.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "nodejs-microservices", 3 | "version": "1.0.0", 4 | "description": "Sample Node.js project to show how to create node apps with microservices architecture.", 5 | "main": "index.js", 6 | "scripts": { 7 | "test": "echo \"Error: no test specified\" && exit 1" 8 | }, 9 | "repository": { 10 | "type": "git", 11 | "url": "git+https://github.com/ArjanAswal/nodejs-microservices.git" 12 | }, 13 | "keywords": [ 14 | "nodejs", 15 | "microservices" 16 | ], 17 | "author": "Arjan Aswal", 18 | "license": "GPL-3.0", 19 | "bugs": { 20 | "url": "https://github.com/ArjanAswal/nodejs-microservices/issues" 21 | }, 22 | "homepage": "https://github.com/ArjanAswal/nodejs-microservices#readme" 23 | } 24 | -------------------------------------------------------------------------------- /products/Dockerfile: -------------------------------------------------------------------------------- 1 | # FROM node:14-slim also works here 2 | FROM node:14-alpine as base 3 | 4 | # install curl for debugging 5 | RUN apk add curl 6 | 7 | # set our node environment, either development or production 8 | # defaults to production, compose overrides this to development on build and run 9 | ARG NODE_ENV=production 10 | ENV NODE_ENV $NODE_ENV 11 | 12 | # default to port 3000 for node 13 | ARG PORT=3000 14 | ENV PORT $PORT 15 | EXPOSE $PORT 16 | 17 | # you'll likely want the latest npm, regardless of node version, for speed and fixes 18 | # but pin this version for the best stability 19 | RUN npm i npm@latest -g 20 | 21 | # install dependencies first 22 | # we have to create the dir with root and change perms 23 | RUN mkdir app && chown node:node app 24 | WORKDIR /app 25 | # the official node image provides an unprivileged user as a security best practice 26 | # but we have to manually enable it. We put it here so npm installs dependencies as the same 27 | # user who runs the app. 28 | 29 | USER node 30 | COPY --chown=node:node package.json package-lock.json* ./ 31 | RUN npm install --no-optional && npm cache clean --force 32 | ENV PATH app/node_modules/.bin:$PATH 33 | 34 | 35 | # a dev and build-only stage. we don't need to 36 | # copy in code since we bind-mount it 37 | FROM base as dev 38 | ENV NODE_ENV=development 39 | RUN npm install --only=development 40 | # We use "npm start" here in development and node in production 41 | CMD ["npm", "start"] 42 | 43 | 44 | FROM dev as test 45 | # copy in our source code last, as it changes the most 46 | # copy in as node user, so permissions match what we need 47 | COPY --chown=node:node . . 48 | CMD ["npm", "test"] 49 | # you would also run your tests here 50 | 51 | 52 | # this only has minimal deps and files 53 | FROM base as prod 54 | # copy in as node user, so permissions match what we need 55 | COPY --chown=node:node . . 56 | # check every 30s to ensure this service returns HTTP 200 57 | HEALTHCHECK --interval=600s CMD node ./src/healthcheck.js 58 | CMD ["node", "./index.js"] -------------------------------------------------------------------------------- /products/database.js: -------------------------------------------------------------------------------- 1 | const { Sequelize } = require('sequelize'); 2 | 3 | const sequelize = new Sequelize(process.env.POSTGRES_URL, { 4 | dialect: 'postgres', 5 | logging: false, 6 | }); 7 | 8 | sequelize 9 | .authenticate() 10 | .then(() => console.log('Connection has been established successfully.')) 11 | .catch(error => { 12 | console.error('Unable to connect to the database:', error); 13 | process.exit(1); 14 | }); 15 | module.exports = sequelize; 16 | -------------------------------------------------------------------------------- /products/index.js: -------------------------------------------------------------------------------- 1 | const express = require('express'); 2 | require('express-async-errors'); 3 | const sequelize = require('./database'); 4 | const isAuthenticated = require('./isAuthenticated'); 5 | const Product = require('./product.model'); 6 | const amqp = require('amqplib'); 7 | const Sequelize = require('sequelize'); 8 | 9 | let channel; 10 | 11 | async function connect() { 12 | const amqpServer = process.env.RABBITMQ_URL; 13 | const connection = await amqp.connect(amqpServer); 14 | channel = await connection.createChannel(); 15 | await channel.assertQueue('PRODUCT'); 16 | } 17 | 18 | connect().catch(error => { 19 | console.error('Unable to connect to the Rabbit MQ:', error); 20 | process.exit(1); 21 | }); 22 | 23 | const app = express(); 24 | 25 | app.use(express.json()); 26 | 27 | const port = +process.env.PORT ?? 3002; 28 | 29 | app.listen(port, () => { 30 | console.log(`Products Service at ${port}`); 31 | }); 32 | 33 | app.get('/products', async (req, res) => { 34 | const results = await Product.findAll(); 35 | 36 | res.status(200).json(results); 37 | }); 38 | 39 | app.post('/products', isAuthenticated, async (req, res) => { 40 | const { name, price, description, imageURL } = req.body; 41 | 42 | const product = await Product.create({ 43 | name, 44 | price, 45 | description, 46 | imageURL, 47 | creator: req.user.email, 48 | }); 49 | 50 | res.status(200).json(product); 51 | }); 52 | 53 | app.post('/products/buy', isAuthenticated, async (req, res) => { 54 | const { ids } = req.body; 55 | const products = await Product.findAll({ 56 | where: { 57 | id: { 58 | [Sequelize.Op.in]: ids, 59 | }, 60 | }, 61 | }); 62 | let order; 63 | 64 | channel.sendToQueue( 65 | 'ORDER', 66 | Buffer.from( 67 | JSON.stringify({ 68 | products, 69 | userEmail: req.user.email, 70 | }) 71 | ) 72 | ); 73 | await channel.consume('PRODUCT', data => { 74 | order = JSON.parse(data.content); 75 | }); 76 | res.json(order); 77 | }); 78 | 79 | sequelize.sync(); 80 | -------------------------------------------------------------------------------- /products/isAuthenticated.js: -------------------------------------------------------------------------------- 1 | const jwt = require('jsonwebtoken'); 2 | 3 | module.exports = async function isAuthenticated(req, res, next) { 4 | const token = req.headers['authorization']?.split(' ')[1]; 5 | 6 | jwt.verify(token, process.env.JWT_SECRET, (err, user) => { 7 | if (err) { 8 | return res.status(401).json({ message: err }); 9 | } else { 10 | req.user = user; 11 | next(); 12 | } 13 | }); 14 | }; 15 | -------------------------------------------------------------------------------- /products/package.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "products", 3 | "version": "1.0.0", 4 | "description": "", 5 | "main": "index.js", 6 | "scripts": { 7 | "start": "nodemon ./index.js", 8 | "test": "echo \"Error: no test specified\" && exit 1" 9 | }, 10 | "keywords": [], 11 | "author": "", 12 | "license": "ISC", 13 | "devDependencies": { 14 | "nodemon": "^2.0.15" 15 | }, 16 | "dependencies": { 17 | "amqplib": "^0.8.0", 18 | "express": "^4.18.0", 19 | "express-async-errors": "^3.1.1", 20 | "jsonwebtoken": "^8.5.1", 21 | "pg": "^8.7.3", 22 | "pg-hstore": "^2.3.4", 23 | "sequelize": "^6.19.0" 24 | } 25 | } 26 | -------------------------------------------------------------------------------- /products/product.model.js: -------------------------------------------------------------------------------- 1 | const { Sequelize, Model, DataTypes } = require('sequelize'); 2 | const sequelize = require('./database'); 3 | 4 | const Product = sequelize.define('Product', { 5 | id: { 6 | type: DataTypes.INTEGER, 7 | primaryKey: true, 8 | autoIncrement: true, 9 | }, 10 | name: { 11 | type: DataTypes.STRING, 12 | allowNull: false, 13 | }, 14 | price: { 15 | type: DataTypes.DECIMAL(10, 2), 16 | allowNull: false, 17 | }, 18 | description: { 19 | type: DataTypes.STRING(1000), 20 | allowNull: false, 21 | }, 22 | imageURL: { 23 | type: DataTypes.STRING, 24 | allowNull: false, 25 | }, 26 | creator: { 27 | type: DataTypes.STRING, 28 | allowNull: false, 29 | }, 30 | }); 31 | 32 | module.exports = Product; 33 | --------------------------------------------------------------------------------