🖥️ Virtual Machines - Advanced

High Availability and Disaster Recovery

Availability Sets and Zones

# Create availability set
az vm availability-set create \
  --name myAvailabilitySet \
  --resource-group myResourceGroup \
  --platform-fault-domain-count 3 \
  --platform-update-domain-count 5

# Deploy VM in zone
az vm create \
  --name myVM \
  --resource-group myResourceGroup \
  --zone 1 \
  --image UbuntuLTS

Site Recovery

# Set up disaster recovery
az backup vault create \
  --name myVault \
  --resource-group myResourceGroup \
  --location eastus

# Enable VM backup
az backup protection enable-for-vm \
  --vault-name myVault \
  --vm myVM \
  --resource-group myResourceGroup \
  --policy-name DefaultPolicy

Performance Optimization

VM Performance Monitoring

# Get detailed metrics
az monitor metrics list \
  --resource /subscriptions/.../myVM \
  --metric "Percentage CPU" \
  --start-time 2024-01-01T00:00:00 \
  --end-time 2024-01-31T23:59:59 \
  --interval PT1H \
  --aggregation Average,Maximum

Premium Managed Disks

# Create premium disk
az disk create \
  --name myPremiumDisk \
  --resource-group myResourceGroup \
  --size-gb 256 \
  --sku Premium_LRS

# Attach to VM
az vm disk attach \
  --vm-name myVM \
  --resource-group myResourceGroup \
  --disk myPremiumDisk

Key Takeaways

• **Availability Sets** provide fault tolerance

• **Site Recovery** enables disaster recovery

• **Premium disks** improve performance

• **Monitoring** identifies optimization opportunities

Next Steps

Explore advanced container and orchestration patterns.