The AMI in an Auto Scaling group must be updated.
Replace instances in controlled batches without stopping every instance at once.
Which feature is most appropriate?
Use Auto Scaling instance refresh to replace instances gradually with the updated launch template.
Detailed explanation
Instance refresh uses the updated launch template to replace instances in controlled batches.
Instance refresh uses the updated launch template to replace instances in controlled batches.
S3 Lifecycle manages objects and does not replace Auto Scaling instances.
S3 Lifecycle manages objects and does not replace Auto Scaling instances.
DNS routing does not change the image used to launch an EC2 instance.
DNS routing does not change the image used to launch an EC2 instance.
Manual termination risks availability and does not provide a managed gradual replacement.
Manual termination risks availability and does not provide a managed gradual replacement.
Check official documentation
Compare the following points with the official documentation.
EC2 Auto Scaling instance refreshの公式説明を確認する。
What to confirm
AMI更新とインスタンス段階置換を対応付けられる。
Key points
- Instance refresh
- Launch template
- Gradual replacement
Notes
- Environment: AWS公式SOA-C03試験ガイドとAWS公式ドキュメントの確認
- Confirm current AWS service behavior in the official documentation.
Foundation review
Gradual rollout
Batch replacement limits simultaneous impact and allows the group to keep serving.
Configuration source
Updating the launch template provides the new AMI definition for replacement instances.