EC2 and Auto Scaling

14 min · Module 4

EC2 is resizable compute. Pair with Auto Scaling for capacity that tracks demand and replaces unhealthy instances. Prefer multiple AZs. Use AMI + user data/launch templates for consistency.

Example / notes

# ASG essentials
# Launch template → min/desired/max → VPC subnets in ≥2 AZs
# Scaling policies: target tracking (CPU), step, scheduled
# Health checks: EC2 and/or ELB

Practice in Lab: /lab/scenarios/three-tier/

Elastic Load Balancing →

Modules in this track

4. Compute & load balancing
- EC2 and Auto Scaling
- Elastic Load Balancing
5. Storage, database & DNS
- S3 storage classes and access
- RDS Multi-AZ and Route 53