User is a microservice that is responsible for User Logins and Registrations Service in RobotShop e-commerce portal.
Setup NodeJS repos. Vendor is providing a script to setup the repos.
curl -sL https://rpm.nodesource.com/setup_lts.x | bash
Install NodeJS
yum install nodejs -y
Configure the application.
Add application User
useradd roboshop
Lets setup an app directory.
mkdir /app
Download the application code to created app directory.
curl -L -o /tmp/user.zip https://roboshop-builds.s3.amazonaws.com/user.zip
cd /app
unzip /tmp/user.zip
Every application is developed by development team will have some common softwares that they use as libraries. This application also have the same way of defined dependencies in the application configuration.
Lets download the dependencies.
cd /app
npm install
We need to setup a new service in systemd so systemctl can manage this service
Setup SystemD User Service
vim /etc/systemd/system/user.service
[Unit]
Description = User Service
[Service]
User=roboshop
Environment=MONGO=true
Environment=REDIS_HOST=<REDIS-SERVER-IP>
Environment=MONGO_URL="mongodb://<MONGODB-SERVER-IP-ADDRESS>:27017/users"
ExecStart=/bin/node /app/server.js
SyslogIdentifier=user
[Install]
WantedBy=multi-user.target
Load the service.
systemctl daemon-reload
systemctl enable user
systemctl start user
For the application to work fully functional we need to load schema to the Database. Then
NOTE: Schemas are usually part of application code and developer will provide them as part of development.
We need to load the schema. To load schema we need to install mongodb client.
To have it installed we can setup MongoDB repo and install mongodb-client
vim /etc/yum.repos.d/mongo.repo
[mongodb-org-4.2]
name=MongoDB Repository
baseurl=https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/4.2/x86_64/
gpgcheck=0
enabled=1
yum install mongodb-org-shell -y
Load Schema
mongo --host MONGODB-SERVER-IPADDRESS </app/schema/user.js