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Project - Implement Blue/Green deployment of Python (Django) Application on AWS Elastic Beanstalk

#aws #devops #django #elasticbeanstalk

buddydome

Image description

Result:- www.buddydome.cloud
Github Repo:- https://github.com/Shocker-lov-t/buddydome


Major AWS Services used :-

  • RDS
  • S3
  • ELASTICBEANSTALK
  • ROUTE53

Step-1: Create an AWS database instance of postgreSql database ( Compulsory in both ) 

    -Login to AWS console and head toward for RDS Service
    -Launch an Postgresql Database instance and note down the username,master username and password of the instance ( it will be shown one time only so make sure to note them down very carefully)
    -Wait for the database instance to be in running state ( Takes approximately 10 min)
    -After Launched, click on the instance and it will show the details of your database
    -Open Django project's Settings.py file, there you will see a section "DATABASE" IN LINE 85 
          >>> Change name to the username to saved earlier
          >>> Change Username to master username
          >>> Change Password to new Password
          >>> Change Host to new host which is shown exactly on aws console database instance page
    -SAVE CHANGES
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Step-2: (Follow only if you are working with BuddyDome with s3 only otherwise ignore this step) Setting up S3 bucket

Create an s3 bucket ( with unchecking the box of " Block all public access" )

Change the bucket policy as follows

//S3 Policy//

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "AddPerm",
            "Effect": "Allow",
            "Principal": "*",
            "Action": "s3:GetObject",
            "Resource": "arn:aws:s3:::s3-bucket/*"
        }
    ]
}
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Create an IAM user

        >>>In AWS Look for IAM service 
        >>>Create an IAM user with S3 Policy
        >>>Generate Access key and secret key and note them down
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Go to your Django project and first install two libraries using following command 

         pip install boto3 django-storages
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Add Following in settings.py file

          import boto3
          from storages.backends.s3boto3 import S3Boto3Storage


          INSTALLED_APPS = [ 
                  'storages'
                  ]

          //Write Corresponding Values//
          AWS_ACCESS_KEY_ID =
          AWS_SECRET_ACCESS_KEY = 
          AWS_STORAGE_BUCKET_NAME = 
          AWS_S3_REGION_NAME='ap-south-1'

          AWS_QUERYSTRING_AUTH = False


          # Set the static files storage backend to S3
          STATICFILES_STORAGE = "storages.backends.s3boto3.S3Boto3Storage"

          # Set the URL for static files
          STATIC_URL = f"https://{AWS_STORAGE_BUCKET_NAME}.s3.amazonaws.com/static/"

          AWS_LOCATION = 'media'

          DEFAULT_FILE_STORAGE = 'storages.backends.s3boto3.S3Boto3Storage'

          # Set the URL for media files
          MEDIA_URL = f"https://{AWS_STORAGE_BUCKET_NAME}.s3.amazonaws.com/{AWS_LOCATION}/"

          STATIC_ROOT = "https://s3.amazonaws.com/my-static-bucket/"
          MEDIA_ROOT = "https://s3.amazonaws.com/my-media-bucket/"
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Some Changes in all urls.py file

//urls.py//

          from Buddy import settings
          from django.conf.urls.static import static
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//In URL_patterns ending Square bracket Add below code as it is//

           +static(settings.STATIC_URL, document_root=settings.STATIC_ROOT)+ static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)
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Step-3: Deployment Using AWS Elastic Beanstalk( Compulsory in Both)

Install Elastic Beanstalk CLI using following:-

     pip install awsebcli
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Create a Config file to speicify settings file and .conf file to specify upload limit for your elasticbeasntalk environment in following format

    ~/BuddyDome/
    |-- .ebextensions
    |   `-- django.config
    |-- .platform
    |   --nginx
    |        --conf.d
    |                `--proxy.conf
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Write the following in django.config file

    container_commands:
      01_collectstatic:
        command: "source $PYTHONPATH/activate && python manage.py collectstatic --noinput"
    option_settings:
      aws:elasticbeanstalk:container:python:
        WSGIPath: Buddy.wsgi:application
      aws:elasticbeanstalk:environment:proxy:staticfiles:
        static: "static"
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Write the Following in proxy.conf

    client_max_body_size 400M;
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In terminal initialize the application for elasticbeanstalk using awsebcli

Make sure you are in main directory where you can access manage.py file ( Use dir or ls command to verify)

    eb init -i

    Select a default region 
    (Default is 3): 6  

    application name: Buddydome

    Enter Application Name
    (default is "BuddyDome "): BuddyDome

    Select a platform
    (make a selection): 9       //Python

    Select a platform branch. 3
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In Terminal Create Elastic beanstalk environment:- 

    eb create Buddydome-env
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use the following to get the status and to open the deployed application:-

    eb status
    eb open
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Use the following only in case you make some changes after environment creation


    eb deploy
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Step-4 : Setting Up DNS (Route53 and Hostinger)

  1. Go to Route53 and create a "Hosted Zone" with corresponding Hostinger domain name ( e.g. buddydome.cloud)
  2. Change Hostinger Nameservers to Route53 Generated Nameservers (changes might take upto 24hr)
  3. In Hosted Zone, create a "A" type Record
    • Leave Subdomain as blank
    • Toggle "Alias"
    • In Endpoint, choose Alias to "Elastic Beanstalk environment"
    • CHoose Corresponding Region, ap-south-1 "Asia Pacific (Mumbai)"
    • Choose Environment, select the corresponding elasticbeanstalk environment that directs to Buddydome Project
      • Click "Add another record"
    • > > Write "www" in subdomain
    • > > Choose Type as "CNAME"
    • > > In Value write original domain i.e. buddydome.cloud
    • Click "Create Records"

Note:- You can add more subdomains similarly by adding another record




With this your application has been successfully deployed and hosted with a Domain

Top comments (4)

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yogini16 profile image
yogini16 •

Thank you for sharing.
Blue green deployment approach allows for seamless updates and rollbacks, minimizing downtime and ensuring reliability in the software deployment process.

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its_tapas_ig profile image
Tapas SInghal •

Precisely, and plus if something goes wrong you can easily go back and switch to an older version of the application.😎

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weatherinmay profile image
weatherInMay • • Edited

I've shared this post of yours on 1024.

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its_tapas_ig profile image
Tapas SInghal •

Thank you for the support.

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