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Difficulty: HardConfigure VMs for High Availability

Your company is migrating a critical line-of-business application to Azure. You plan to deploy three virtual machines named VM-Prod1, VM-Prod2, and VM-Prod3 to the East US 2 region. The deployment must meet the following requirements:

- Protect the application against localized datacenter outages.
- Provide a 99.99%99.99\% SLA for the virtual machines.
- Automatically distribute incoming traffic across the virtual machines.

You need to configure the high availability and load balancing strategy.

Which two actions should you perform? Select two.

  1. Deploy VM-Prod1, VM-Prod2, and VM-Prod3 across three different Availability Zones in the East US 2 region.Answer
  2. Deploy an Azure Standard Load Balancer to distribute traffic to the virtual machines.Answer
  3. C
    Deploy VM-Prod1, VM-Prod2, and VM-Prod3 into a single Availability Set that spans multiple Availability Zones.
  4. D
    Deploy an Azure Basic Load Balancer to distribute traffic to the virtual machines across the Availability Zones.
  5. E
    Create the virtual machines first, and then associate them with a new Availability Set.

Answer

Deploy the virtual machines across three different Availability Zones in the East US 2 region, and deploy an Azure Standard Load Balancer to distribute traffic to the virtual machines.
Deploying the virtual machines across three different Availability Zones ensures that the VMs are located in separate physical datacenters within the region, providing protection against facility-level outages and meeting the 99.99% SLA requirement. Utilizing an Azure Standard Load Balancer is necessary because it is zone-redundant and supports routing traffic to backend pools that span multiple Availability Zones.

Step-by-Step Solution

1
Analyze the SLA and high availability requirements.
To achieve a 99.99% SLA and protect against datacenter-wide failures, the virtual machines must be deployed across multiple Availability Zones rather than an Availability Set (which only protects against hardware failures within a single datacenter and offers a 99.95% SLA).
Availability Zones provide isolation against power, cooling, and networking issues at the datacenter level.
2
Determine the load balancing requirements for zone-redundant architectures.
Standard Load Balancer must be selected because Basic Load Balancer does not support backend pools containing VMs in multiple Availability Zones.
Standard SKU resources are zone-redundant and designed to span across multiple zones.
3
Evaluate the VM creation workflow constraints.
Confirm that VMs must be configured for high availability (zones or sets) at creation time, as they cannot be moved into an Availability Set post-deployment.
Azure resource configuration constraints prevent modifying the availability set membership of a deployed VM.

Key Concept

Azure virtual machines deployed across multiple Availability Zones require a Standard Load Balancer to distribute traffic and achieve a 99.99% SLA.
Estimated Time:2m 30s
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Topics

Configure VMs for High Availability

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