How to change EC2 instance type after launch

Introduction

This tutorial will guide you through the process of changing the instance type of an Amazon EC2 instance after it has been launched. This is a useful skill for optimizing performance or adjusting resources based on your application's needs.

Step 1: Prepare for Instance Type Change

Before changing the EC2 instance type, follow these preparatory steps:

• Back Up Your Data: Ensure you have backups of any important data on your instance. You can create an Amazon Machine Image (AMI) or snapshot your volumes.
• Check Instance Compatibility: Review the documentation on EC2 instance types to ensure that the new type you want is compatible with your current instance configuration.

Step 2: Stop the EC2 Instance

You cannot change the instance type while the instance is running. Follow these steps to stop your instance:

1. Log in to the AWS Management Console.
2. Navigate to the EC2 Dashboard.
3. Select "Instances" from the left-hand menu.
4. Find and select the instance you wish to modify.
5. Click on the “Instance State” dropdown menu.
6. Choose “Stop Instance” and confirm your action.

Step 3: Change the Instance Type

Once the instance is stopped, you can change its type:

1. With your instance still selected, click on the “Actions” button.
2. Hover over “Instance Settings,” then click on “Change Instance Type.”
3. In the new window, select the desired instance type from the dropdown list.
4. Review the settings to ensure they meet your needs.
5. Click on "Apply" to save the changes.

Step 4: Start the EC2 Instance

After changing the instance type, you need to start your instance again:

1. Select your modified instance from the list.
2. Click on the “Instance State” dropdown menu.
3. Choose “Start Instance” and confirm your action.

Step 5: Verify the Changes

Once the instance is running again, confirm that the instance type has been updated:

• Go back to the EC2 Dashboard and select your instance.
• Check the “Instance Type” field in the instance details to ensure it reflects the new type.

Conclusion

Changing the instance type of your EC2 instance is a straightforward process that can greatly enhance your application's performance. Remember to back up your data, ensure compatibility, and follow the steps to stop, modify, and restart your instance. For further information, refer to the EC2 instance types and FAQs linked in the video description.