DevOps Project (using Docker, Jenkins and AWS)

Prerequisites

Before starting the project you should have these things in your system.

  • Account on AWS
  • Python with Virtual environment & Django installed
  • Todo App code (we will use code from this repository : Django todo app)

Step 1 : Run Locally

Before deploying the app on AWS, we will test run the app locally.

  • Create a folder for the project, open the folder in VS code and open terminal in VS Code.
  • Clone the repository.
  git clone https://github.com/shreys7/django-todo.git
  • Now we will create a virtual environment named env for the app so that it doesn’t affect our system.
   virtualenv -p python3.11 env
  • Activate the vritual environment

For windows/VS Code

   env\Scripts\activate

For Linux/MacOS/Git Bash

   source env/bin/activate
  • Change directory to the app directory
   cd django-todo
  • create all the migrations file (database migrations) required to run this App.
   python manage.py makemigrations
  • Now, to apply this migrations run the following command
   python manage.py migrate
  • We need to create an admin user to run this App. Type the following command and provide username, password and email for the admin user
   python manage.py createsuperuser
  • We just need to start the server now. Start the server by following command
   python manage.py runserver

step 2 : Create requirement file

We will create a requirement file using the following command. It will add all the changes or dependencies we had to install because of error in this file and it will help us in Docker part.

   pip freeze > requirement.txt

step 3 : Set up AWS EC2 instance

  • Create an EC2 instance and connect to it via SSH from your terminal
  • After successfully connecting to the EC2 instnce, it will look something like this
  • Now we are on EC2 instance. so create a new directory named DevOps_Project_1
   mkdir DevOps_Project_1
  • Now change directory to the newly created directory
   cd DevOps_Project_1
  • clone the django todo app repo here like we did in local
   git clone https://github.com/shreys7/django-todo.git
  • Now change directory and move to the django-todo directory
   cd django-todo/
  • Add your instance’s public IP to allowed host in setting.py file
   vi todoApp/settings.py

find allowed host and enter your public IP or just enter ‘*’ so that all Ip are allowed

  • Also go to you EC2 dashoard > go to secuirity groups > edit inbound rules > add rule nd add rule as shown in screenshot to allow traffic from everywhere on mentioned port.
  • Now go back to terminal and Install docker on the EC2 instance
   sudo apt install docker.io

step 4 : Create dockerfile and run it

  • using vim create a Dockerfile
   vi Dockerfile
  • enter insert mode by pressing “i” and write the file as shown in the screenshot.

you can check and take the version of django from requirement.txt we created earlier.

  • press esc and use :wq and enter to save the file and exit vim.
  • Now build the docker file we created
   sudo docker build . -t todo-app
  • In the end you will get a container ID. Copy that container ID and run the container with the following command.
   sudo docker run -p 8001:8001 62761281ad8f
  • Now go to your browser and copy your public IP and use it to check if the app is running as shown in screenshot

enter your public IP:8001. example : 3.88.168.176:8001

step 5 : Install and setup jenkins on your EC2 instance

  • Update your system
   sudo apt update
  • Install java
   sudo apt install openjdk-11-jre
  • Install jenkins : Just copy these commands, paste them and run them one by one onto your terminal
   curl -fsSL https://pkg.jenkins.io/debian/jenkins.io.key | sudo tee \   /usr/share/keyrings/jenkins-keyring.asc > /dev/null
   echo deb [signed-by=/usr/share/keyrings/jenkins-keyring.asc] \   https://pkg.jenkins.io/debian binary/ | sudo tee \   /etc/apt/sources.list.d/jenkins.list > /dev/null
   sudo apt-get update
   sudo apt-get install jenkins
  • Start Jenkins with these commands
   sudo systemctl enable jenkins
   sudo systemctl start jenkins
   sudo systemctl status jenkins
  • Add port 8080 to your inbound rules in secuirity groups to allow traffic on it like we did for port 8001.
  • Now open Jenkins in browser by using public IP and port number
  • Get the password from given location and paste it here
   sudo cat /var/lib/jenkins/secrets/initialAdminPassword
  • Click install suggested plugin and go ahead ith the installation
  • create and setup your admin user and your are done. You must be on the Jenkins homepage now
  • Open your terminal and add jenkins to sudoers s shon in the screen shot so that when we build our job in jenkins it can have sudo access
   sudo visudo

use above command to open the file and then add jenkins like this

Step 6 : create a GitHub repo for the project and push code from local to the repository

  • create a new GitHub repository with name you want.
  • copy the repository url, now go back to instance terminal and change the remote repository to your new repository
   git remote set-url origin https://github.com/imran1509/jenkins-cicd-project-1.git
  • Add ll files to staged
   git add .
  • commit all the files
   git commit -m "added server code"
  • push the code to repository
   git push origin develop

step 7 : Integrate jenkins with GitHub

  • Open your instance’s jenkins and go to manage jenkins > configure sytsem > find github servers here and add your github credentials
  • save it.

Step 8 : Deploy the app using Jenkins now

  • Create a new job as a freestyle project named todo-app
  • Then in source code management choose git. And paste your repositpory url there.
  • And in branches to build, write develop as we have pushed our code to the develop branch.
  • Now in build step. Add build step as eecute shell and write the following commands.
   sudo docker build . -t todo-app
   sudo docker run -p 8001:8001 -d todo-app
  • save it and click on build now to run the job.
  • It worked successfully. No you can check in other tab with public IP and port number if the app is running.
  • woohoo. congrats your app is running and you have successfully completed this project.
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