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Difficulty: EasyConfigure VMs for High Availability

NovaApp Corp. plans to deploy two new virtual machines named VM-Web11 and VM-Web12 in the East US region. The deployment must minimize downtime caused by localized hardware failures or scheduled maintenance within the Azure infrastructure.

Which of the following configuration options can you use to achieve this goal? Select two.

  1. Deploy the virtual machines in a single Availability Set.Answer
  2. Deploy the virtual machines across different Availability Zones.Answer
  3. C
    Deploy the virtual machines as standalone resources first, and then add them to a new Availability Set.
  4. D
    Deploy the virtual machines in a single Availability Set that spans across multiple Availability Zones.

Answer

Deploying the virtual machines in a single Availability Set, or deploying them across different Availability Zones.
Deploying the virtual machines in a single Availability Set protects them from localized hardware failures and maintenance events by spreading them across different fault and update domains. Alternatively, deploying them across different Availability Zones provides even higher availability by placing the virtual machines in physically separate datacenters within the same region.

Step-by-Step Solution

1
Evaluate the option to deploy both VMs in a single Availability Set.
This is a valid configuration because Availability Sets group virtual machines to ensure they are isolated from each other across physical infrastructure (fault domains and update domains) within a single Azure datacenter.
To ensure protection against localized hardware failures and planned maintenance.
2
Evaluate the option to deploy the VMs in different Availability Zones.
This is a valid configuration because Availability Zones are physically separate locations within an Azure region, providing higher availability by protecting against datacenter-wide failures.
To ensure protection against datacenter-level power, cooling, or network outages.
3
Evaluate the option to add existing VMs to an Availability Set.
This is invalid because Azure requires virtual machines to be configured in an Availability Set during the initial creation process.
To identify configuration constraints.
4
Evaluate the option to span an Availability Set across multiple zones.
This is invalid because Availability Sets are a single-datacenter local redundancy mechanism and cannot span multiple Availability Zones.
To identify architectural limitations of Availability Sets.

Key Concept

High availability options for Azure Virtual Machines include Availability Sets (for intra-datacenter redundancy) and Availability Zones (for inter-datacenter redundancy within a region).
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Configure VMs for High Availability

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