How we moved from Heroku to AWS using Docker

说明与用途

使用 Docker 将应用从 Heroku 迁移到 AWS，提升了扩展控制并降低了托管成本。

问题

The team needed to migrate a production application from Heroku to AWS while maintaining deployment speed and cost efficiency.

结果

The migration completed with minimal downtime, improved control over scaling, and a reduction in monthly hosting costs.

工作流

• 1. Containerize the application using Docker and create a Dockerfile.
• 2. Push the image to Amazon ECR (Elastic Container Registry).
• 3. Configure an ECS task definition pointing to the ECR image.
• 4. Set up an ECS service with desired number of tasks and load balancer.
• 5. Migrate the PostgreSQL database from Heroku Postgres to Amazon RDS.
• 6. Update environment variables and secrets in AWS Parameter Store or Secrets Manager.
• 7. Test the deployment in a staging environment.
• 8. Cut over traffic from Heroku to the new AWS ECS service.
• 9. Decommission Heroku resources.