I usually create a snapshot of any primary server. I can quickly setup the secondary server from snapshot when needed.
Create image
- Select the instance from EC2 service
- Click "Actions > Image > Create Image"
- Enter the image name, then click "create Image"
- Wait until the image creation finish.
Create instance from image
- Select the image you created from "IMAGES > AMIs"
- Click "Actions > Launch"
- Select instance type and click "Review and Launch"
- Update "Security Group" when necessary
- Test the server
- Delete the test instance and volume after testing