Autoscaling implementation in realtime

Question

I am trying to implement auto-scaling into my application. I deployed my application into an EC2 instance and created one AMI from it, and I used that AMI as a launch template. So my application was deployed in an auto-scaling instance. Whenever I did the changes in the main server, the auto-scaling instance wouldn't update. how can we do this task Like, whenever i did the change into main server, that application changes will automatically needs to be reflected in auto-scaling instance too without out any manual intervention

re:Post Agent · Answer

To implement auto-scaling with real-time updates for your application, you'll need to modify your approach. Instead of relying solely on a static AMI, you can use a combination of techniques to ensure your auto-scaling instances always have the latest version of your application.

Here's a recommended approach:

1. Use a base AMI: Start with a minimal AMI that contains only the essential components and dependencies for your application.

2. Implement a deployment mechanism: Use a tool like AWS CodeDeploy to automatically deploy your application code to new instances as they are launched by the Auto Scaling group.

3. Create a Launch Template: Configure your Launch Template to include user data scripts that will pull the latest version of your application or necessary configuration files from a centralized location (like an S3 bucket) during instance launch.

4. Set up a CI/CD pipeline: Implement a continuous integration and deployment pipeline that automatically updates your application in the centralized location (e.g., S3) whenever changes are pushed to your main branch.

5. Update your Auto Scaling group: Configure your Auto Scaling group to use the latest version of your Launch Template automatically.

6. Instance Refresh: Use the Instance Refresh feature of Auto Scaling groups to gradually replace old instances with new ones that have the latest application version.

By following this approach, whenever you make changes to your main server or repository, the CI/CD pipeline will automatically update the centralized location with the new version. Then, as new instances are launched by the Auto Scaling group (either due to scaling events or instance refreshes), they will automatically fetch and deploy the latest version of your application.

This method ensures that your auto-scaling instances are always up-to-date with the latest changes, without requiring manual intervention each time you update your application.  
**Sources**  
[Implementing EC2 Auto Scaling using CI/CD | AWS re:Post](https://repost.aws/questions/QUNtn6HrDkRMOTYZjyEzPECg/implementing-ec2-auto-scaling-using-ci-cd)  
[Amazon ECS EC2-backed auto scale-out and scale-in | AWS re:Post](https://repost.aws/questions/QU_dFQyuXsToy9SFXxPvaryQ/amazon-ecs-ec2-backed-auto-scale-out-and-scale-in)

Riku_Kobayashi · Answer

Hello.

If you manage your application code in a repository such as GitHub, it is a good idea to set up a CI/CD pipeline.  
By setting up a CI/CD pipeline, you no longer need to connect directly to EC2, edit your code, and then create an AMI.  
https://docs.aws.amazon.com/codedeploy/latest/userguide/integrations-aws-auto-scaling.html

Autoscaling implementation in realtime

Relevant content