Security and Operational Considerations
Security in Auto Scaling environments must be automated.
IAM Roles
Instances must use IAM roles, not hard-coded credentials.
When instances scale dynamically:
- Credentials must be attached automatically
- Secrets must be retrieved securely
Use:
- Instance Profiles
- Secrets Manager
- Parameter Store
Network Security
Auto Scaling Groups typically run inside private subnets.
Public access should occur through:
- Load Balancer
- API Gateway
Security groups should follow least privilege principles.
Logging and Observability
Scaling without observability is dangerous.
You must monitor:
- Request rate
- Latency
- Error rate
- CPU and memory
- Scaling events
CloudWatch alarms should notify operations teams when scaling behaves unexpectedly.
Production insight: Unexpected scale-in events can terminate active sessions if session state is not externalized.
Store session data in:
- ElastiCache
- DynamoDB
- External data store
Never rely on instance-local state in scalable architectures.
In this section, I learned:
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