📖 What is Azure Virtual Machines?
Azure Virtual Machines provide on-demand, scalable computing infrastructure as a service (IaaS). Users have complete control over the operating system, including installation, maintenance, and configuration. VMs offer flexibility to deploy various workloads and customize the computing environment to specific requirements.
"Understand the IaaS model and the level of responsibility assumed by the user. Exam questions frequently contrast VMs with PaaS offerings like App Service. Be prepared to identify scenarios where full OS control is necessary versus managed services."
📚 Certification: Microsoft Azure Fundamentals (AZ-900)
🔑 What are the Key Concepts of Azure Virtual Machines?
- ▸ Virtual Machines fall under the IaaS cloud service model, granting users control over the OS, middleware, and applications.
- ▸ VM sizes determine the vCPU, memory, and disk capacity available, impacting performance and cost; choosing the right size is crucial.
- ▸ Azure offers various VM images (Windows, Linux, custom) pre-configured for different workloads, simplifying deployment.
- ▸ Availability Sets and Availability Zones enhance VM resilience by distributing them across fault domains and physical locations.
- ▸ Users are responsible for patching, updating, and securing the OS within Azure VMs, unlike PaaS offerings.
🎯 How does Azure Virtual Machines appear on the AZ-900 Exam?
You may be asked to identify the Azure service best suited for migrating an existing on-premises application with specific OS and software dependencies.
A scenario might describe a need for full administrative control over the operating system and software stack – determine if VMs are the appropriate choice.
Expect questions about comparing the responsibilities of Azure administrators when using VMs versus Azure App Service for application deployment.
❓ Frequently Asked Questions
When would I choose a Virtual Machine over Azure App Service?
Choose VMs when you need full control over the OS, require custom software installations, or have applications not supported by App Service. App Service is better for simpler, managed deployments.
What is the difference between an Availability Set and an Availability Zone?
Availability Sets protect against hardware failures within a datacenter. Availability Zones distribute VMs across physically separate datacenters for higher resilience against regional outages.
How do I manage costs associated with Azure Virtual Machines?
Right-sizing VMs, utilizing reserved instances, and leveraging Azure Hybrid Benefit (for Windows Server licenses) are key strategies for cost optimization. Regularly monitor VM usage.