📈 AWS Scaling & Load Balancing

Introduction

AWS provides autoscaling and load balancing to handle variable workloads efficiently.

Key Learning Outcomes

By the end of this lesson, you'll understand:

• Auto Scaling Groups

• Load balancer types

• Scaling policies

• Health checks

• Target groups

• Traffic distribution

Auto Scaling Group

# Create launch template
aws ec2 create-launch-template \
  --launch-template-name my-template \
  --launch-template-data file://template.json

# Create Auto Scaling Group
aws autoscaling create-auto-scaling-group \
  --auto-scaling-group-name my-asg \
  --launch-template LaunchTemplateName=my-template \
  --min-size 1 \
  --max-size 10 \
  --desired-capacity 2 \
  --availability-zones us-east-1a us-east-1b

Application Load Balancer

# Create load balancer
aws elbv2 create-load-balancer \
  --name my-alb \
  --subnets subnet-12345678 subnet-87654321 \
  --security-groups sg-12345678

# Create target group
aws elbv2 create-target-group \
  --name my-targets \
  --protocol HTTP \
  --port 80 \
  --vpc-id vpc-12345678

Scaling Policies

# Create scaling policy
aws autoscaling put-scaling-policy \
  --auto-scaling-group-name my-asg \
  --policy-name scale-up \
  --policy-type TargetTrackingScaling \
  --target-tracking-configuration file://policy.json

Key Takeaways

• **Auto Scaling** adjusts capacity automatically

• **Load Balancers** distribute traffic

• **Health checks** ensure reliability

• **Policies** define scaling behavior

• **Cost efficient** under variable load

Next Steps

Learn about ECS for containers, or explore cost optimization.