📈 Azure Scaling & Load Balancing

Introduction

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

Key Learning Outcomes

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

• Autoscaling policies

• Load balancer configuration

• Application Gateway

• Traffic Manager

• Performance monitoring

• Cost optimization

Autoscaling Virtual Machines

# Create autoscale settings
az monitor autoscale create \
  --resource-group myResourceGroup \
  --resource myVMScaleSet \
  --resource-type "Microsoft.Compute/virtualMachineScaleSets" \
  --min-count 2 \
  --max-count 10 \
  --count 2

# Add scale rule
az monitor autoscale rule create \
  --resource-group myResourceGroup \
  --autoscale-name myAutoscale \
  --condition "Percentage CPU > 75 avg 5m" \
  --scale out 1

Load Balancer

# Create load balancer
az network lb create \
  --resource-group myResourceGroup \
  --name myLoadBalancer \
  --sku Standard

# Create backend pool
az network lb address-pool create \
  --resource-group myResourceGroup \
  --lb-name myLoadBalancer \
  --name myBackendPool

# Create health probe
az network lb probe create \
  --resource-group myResourceGroup \
  --lb-name myLoadBalancer \
  --name myHealthProbe \
  --protocol http \
  --port 80 \
  --path /health

Application Gateway

# Create Application Gateway
az network application-gateway create \
  --name myAppGateway \
  --resource-group myResourceGroup \
  --vnet-name myVNet \
  --subnet mySubnet \
  --capacity 2 \
  --sku Standard_v2 \
  --http-settings-cookie-based-affinity Disabled \
  --frontend-port 80 \
  --http-settings-port 80 \
  --http-settings-protocol Http \
  --public-ip-address myPublicIP

Key Takeaways

• **Autoscaling** adjusts resources based on demand

• **Load Balancer** distributes traffic

• **Application Gateway** provides advanced routing

• **Traffic Manager** enables global load balancing

• **Monitoring** informs scaling decisions

Next Steps

Learn about containers with Azure Kubernetes Service, or explore static web apps deployment.