Microsoft Azure Hosting – This guide introduces key concepts related to deploying and managing Microsoft Azure infrastructure. If you’re new to cloud computing or Azure, this guide will help you quickly get started with the concepts, deployment, and management details. Many chapters in this manual discuss operations such as deploying a virtual machine and then provide links to more in-depth technical details.
Cloud computing is a modern alternative to the traditional local data center. Public cloud providers provide and manage all computing infrastructure and core management software. These providers provide a wide range of cloud services. In this case, the cloud service can be a virtual machine, a web server, or a database engine hosted in the cloud. As a customer of a cloud provider, you rent these cloud services as needed. By doing so, you convert the capital cost of hardware maintenance into an operating cost. The cloud service also provides these benefits:
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With a local infrastructure, you have full control over the hardware and software being installed. Historically, this has led to hardware procurement decisions focused on increasing scale. An example is buying a server with more cores to meet peak performance needs. Unfortunately, this infrastructure may be underutilized outside of the demand window. With Azure, you can deploy only the infrastructure you need and adjust it up or down at any time. This leads to a focus on scaling by deploying additional compute nodes to meet the performance need. Scaling cloud services is more cost-effective than scaling through expensive hardware.
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Microsoft has deployed many Azure data centers around the world, with more planned. In addition, Microsoft is increasing sovereign clouds in regions such as China and Germany. Only the largest global companies can deploy data centers in this way, so using Azure makes it easy for companies of all sizes to deploy their services close to their customers.
For small businesses, Azure provides a low-cost entry point with the ability to rapidly scale as computing demand increases. This avoids large capital investments in front-end infrastructure and provides the flexibility to rebuild and rework systems as needed. Using cloud computing fits well with the scale and failure model of startup growth.
Azure uses a cloud computing model based on categories of services provided to customers. The three categories of services include Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS). Vendors share some or all of the responsibility for the compute stack components in each of these categories. Let’s take a look at each of the cloud computing categories.
An IaaS cloud provider runs and manages all the physical computing resources and software needed to enable computer virtualization. The customer of this service deploys virtual machines in these hosted data centers. Although the virtual machines are located in an external data center, the IaaS consumer controls the configuration and management of the operating system and leaves the underlying infrastructure to the cloud provider.
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Azure includes several IaaS solutions, including virtual machines, virtual machine scale packages, and related network infrastructure. Virtual machines are a popular choice for initially migrating services to Azure because it enables a “lift and switch” migration model. You can configure the VM as the infrastructure that currently runs your services in your data center, and then migrate your software to the new VM. You may need to make configuration updates, such as URLs to other services or storage, but you can copy many apps this way.
Virtual machine scales are built on top of Azure Virtual Machines and provide an easy way to deploy clusters of similar virtual machines. Virtual machine scales support auto-scaling to automatically deploy new virtual machines as needed. This makes virtual machine scale an ideal platform for deploying high-end microservices clusters such as Azure Service Fabric and Azure Container Service.
With PaaS, you host your application in an environment provided by a cloud service provider. The vendor handles all infrastructure management so you can focus on application development and data management.
Azure provides several PaaS computing offerings, including Azure App Service and Azure Cloud Services (web and worker roles) web app functionality. In any case, there are several ways developers can deploy their application without knowing anything about the nuts and bolts of supporting it. Developers don’t need to create virtual machines (VMs), use Remote Desktop Protocol (RDP) to access each one, or install an application. They simply clicked a button (or close to it) and Microsoft’s tools provisioned the virtual machines, then deployed and installed the application on them.
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SaaS is centralized and managed software. It is usually based on a multi-tenant architecture – one version of the application is used for all clients. It can be scaled to multiple instances to ensure optimal performance across all locations. SaaS software is typically licensed through a monthly or annual subscription. SaaS software providers are responsible for all components of the software stack, so all the services you manage are provided.
A good example of a SaaS offering is Microsoft 365. Subscribers pay a monthly or annual subscription fee and receive Microsoft Exchange, Microsoft OneDrive, and the rest of the Microsoft Office suite as a service. Subscribers always get the latest version and Exchange Server is managed for you. Compared to installing and updating Office every year, it’s cheaper and requires less effort.
Azure is a global cloud platform widely available in many regions around the world. When you provision a service, application, or virtual machine in Azure, you are prompted to select a region. The selected region represents the specific data center where your application runs. For more information, see Azure regions.
One of the advantages of using Azure is that you can host your applications in different data centers around the world. The region you choose may affect the performance of your app. It’s best to choose an area closer to most of your customers to minimize the wait on network requests. You can also choose a region where your app is legally eligible to be distributed in certain countries/regions.
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The Azure portal is a web-based application that can be used to create, manage, and delete Azure resources and services. The Azure portal is located at portal.azure.com. It includes a customizable dashboard and tools for managing Azure resources. It also provides account and subscription information. For more information, see Microsoft Azure Portal overview and Managing Azure resources through the portal.
Azure resources are personal computing, network, data, or application hosting services installed in an Azure subscription. Some common resources are virtual machines, storage accounts, or SQL databases. Azure services often consist of multiple Azure resources. For example, an Azure VM might contain a VM, storage account, NIC, and public IP address. These resources can be created, managed, and deleted individually or as a group. Azure resources are covered in more detail later in this guide.
An Azure resource group is a container that contains the relevant resources for an Azure solution. A resource group can contain all the resources for a solution or just the resources you want to manage as a group. Azure resource groups are discussed in more detail later in this guide.
An Azure Resource Manager template is a JavaScript Object Notation (JSON) file that defines one or more resources to be deployed to a resource group. It also defines dependencies between deployed resources. Resource Manager templates are covered later in this guide.
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In addition to creating, managing, and deleting resources using the Azure portal, you can automate these activities using PowerShell or the Azure CLI.
Azure PowerShell is a collection of modules that provide cmdlets for managing Azure. You can use cmdlets to create, manage, and delete Azure services. Cmdlets help you achieve consistent, repeatable, and practical deployments. For more information, see How to install and configure Azure PowerShell.
The Azure CLI provides a command-line experience for creating, managing, and deleting Azure resources. The Azure CLI is available for Windows, Linux, and macOS. For more information and technical information, see Setting up the Azure CLI.
Azure is built on a set of REST APIs that support the Azure Portal UI. Many of these REST APIs are also supported, so you can program and manage your Azure resources and applications from any Internet-enabled device. For more information, see the Azure REST SDK link.
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Administrators can access Azure PowerShell and Azure CLI through a browser-based experience called Azure Cloud Shell. This interactive interface provides a flexible tool for Linux and Windows administrators to use any command line interface such as Bash or PowerShell. Azure Cloud Shell can be accessed through a portal, as a standalone web interface at shell.azure.com, or from a number of other access points. For more information, see Azure Cloud Shell overview.
A subscription is a logical group of Azure services associated with an Azure account. A single Azure account can contain multiple subscriptions. Billing for Azure services is complete
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