If you’re a regular reader of blogs or regularly attend user group or conference events, you probably find that the cloud is a little bit confusing. Bear in mind that you are in the minority. And no, I don’t mean to say that everyone else has the cloud figured out already! On the contrary, most people in our industry do not attend events, they don’t subscribe to blogs, they don’t watch videos, and they don’t follow information sources on social media. For these people, the cloud is a complete mystery. And this is why it makes sense to explain what Microsoft Azure is.
Every company in the online software service industry has their own definition of a cloud. Many of those vendors stick with industry-accepted norms. Some like to twist the terminology to serve their own marketing needs. And some misuse the terminology because of lack of knowledge — for example, running vSphere or Hyper-V doesn’t mean that you have a private cloud.
The US National Institute of Standards and Technology (NIST) has published what many consider to the be the best definition of a cloud. There are five essential characteristics of a cloud, but the one that stands out for me is “on demand self-service”; this is where a consumer of the cloud can deploy what they need, when they need it, and without requiring human assistance from the service provider.
NIST also describes service models:
And NIST also describes deployment models; I will stick with the three major ones that we are likely to encounter outside of the world of science and research:
I struggle to describe what Azure is in a few sentences. I’ve been evolving my description for two years, and I’ve come up with a method that techies seem to understand.
Imagine that you have just installed a new copy of Windows Server on a physical server. Open up Server Manager and stat the wizard to add roles and features. Look at how many things you can do there. You can deploy a domain controller, a file server, an application server, a Hyper-V host, a web server, an RDS session host, a web server, and much more. Few techies have ever checked more than 5-10 of the many possible options in that dialog.
Now imagine a Windows Server that spanned 1 or 2 million physical servers in data centers around the world. You don’t have to manage those physical machines or the Windows installations; Microsoft does that for you. Instead, they give you a portal and PowerShell, allowing you to deploy what you want on those servers. You can deploy storage systems, databases, virtual networks that are isolated by default, virtual machines that run Windows Server or Linux, a Microsoft-managed Remote Desktop Services farm, and lots more.
The answer is yes; Microsoft’s cloud is all three. Azure does span all three of the service models:
Microsoft Azure currently offers public cloud functionality and hybrid cloud services. You can run a service entirely within Azure. Or you can link in-Azure services with on-premises services via a number of means, including:
And there’s also a public preview of Microsoft Azure Stack (MAS) that will allow you to run a Windows Server 2016-based version of Azure on-premises, with a consistent management and deployment engine (Azure Resource Manager or ARM).
To be honest, listing the features of Azure is a fool’s task. It’s a long list, and by the time you’re done, you’re going to be already out of date. I like to focus on solutions instead. If you’re reading Petri.com, then you’re probably involved in infrastructure, so the elements of IaaS and hybrid cloud will probably be of most interest to you, and that’s also what I’m typically being asked about by my customers.
I haven’t even talked about big data, infrastructure-free PaaS, media streaming, hosting mobile apps, or any of a huge collection of things that Azure can do.
What makes Azure (and Google and AWS) different is that it is a cloud-scale deployment. No other cloud comes close to the big three. Azure exists in a number of regions, 22 now, with five more announced, around the world, with each region consisting of multiple data centers. Eighteen months ago, it was believed that Azure had over 1 million physical Hyper-V hosts. Microsoft builds their own hardware, and this, combined with their bulk purchasing ability, and drive to software-defined-everything means that they can drive costs down.
When you consider Azure, you are considering entering a practically unlimited pool of scalability and functionality. Don’t let that scare you if you think you are small — this should be an advantage. You can get into Azure with no long-term commitment, and pay for just what you use. The billing of some services is designed for huge customers, so doing geo-load balancing or static content caching for websites can cost just a few dollars per month for a smaller customer — try getting that sort of value from a traditional hoster!
If you are a disk monkey, then your job might be at risk. A cloud such as Azure removes the need to manage hardware. Microsoft supplies everything in the form of templates or services. For example, if I want a virtual machine, I can choose a Windows Server 2012 R2 virtual machine, possibly pre-installed with SQL Server. After that deploys, Microsoft’s involvement with that machine ends, unless I opt into anti-virus, patching, or security services. The valuable piece of IT, from the OS and up, is still the responsibility of the engineer, so that job does not go away if your employer opts to start using Azure.
The way I look at it is, the work that consumes time and introduces risk that the business doesn’t care about is taken care of by Microsoft, and you do the valuable stuff that the business does see.
Azure is a huge public cloud that can do a lot of things for businesses of all scales. Often it solves old problems that were previously deemed unfixable because of the cost to the business. The product is huge and the rate of change is incredible — I know of one feature that had over 250 changes in one month last year. Azure is not something that you can do part time. For this reason, it’s important to engage subject matter experts to help you identify what a cloud like Azure can do for your business and to help you deploy those solutions, and hopefully bring the potential of this cloud to you and your employer.