How to change instance type in AWS ECS cluster?

Question

I have a cluster in AWS EC2 Container Service. When I\'ve set it up, I used t2.micro instances because those were sufficient for development. Now I\'d like to use more powerful

Answer 1

This is how to do it without any downtime:

1. Create a copy of the Launch Configuration used by your Auto Scaling Group, including any changes you want to make.
2. Edit the Auto Scaling Group to:
   • Use the new Launch Configuration
   • Desired Capacity = Desired Capacity * 2
   • Min = Desired Capacity
3. Wait for all new instances to become 'ACTIVE' in the ECS Instances tab of the ECS Cluster
4. Select the old instances and click Actions -> Drain Instances
5. Wait until all the old instances are running 0 tasks
6. Edit the Auto Scaling Group and change Min and Desired back to their original values