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DEMO: Stopping a VM

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Overview
DifficultyIntermediate
Duration1h 27m
Students1400
Ratings
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Description

This course will give you a basic understanding of Azure virtual machines (VMs) and how you can use them in your Azure environments.

The course begins by introducing you to Azure VMs and what resources are necessary to deploy them, before moving onto pricing and the different virtual machine options available. Next, the course explores availability sets and availability zones and gives a demonstration that shows you how to create an availability set using the Azure portal.

The course shows how to deploy both Windows and Linux virtual machines, and you'll get a demonstration of how to deploy and connect to each. Rounding off the course is a section on basic management tasks; you’ll learn how to start, stop, restart, redeploy, and resize virtual machines.

This course is packed full of real-world demonstrations from within the Azure portal to give you first-hand experience of how to get the most from Azure Virtual Machines.

For any feedback you may have relating to this course, please contact us at support@cloudacademy.com.

Learning Objectives

  • Gain a foundational understanding of Azure virtual machines, their features, and their pricing
  • Learn how to set up availability sets
  • Learn how to create and connect to both Windows and Linux virtual machines with Azure
  • Learn how to manage your Azure VMs including starting, stopping, restarting, redeploying, and resizing VMs

Intended Audience

This course is intended for anyone who is interested in learning about the basics of Azure virtual machines.

Prerequisites

To get the most from this course you should have a basic understanding of Microsoft Azure and of the Azure portal.

Transcript

Hello and welcome back. In the previous lesson, we walked through the process of starting a VM and restarting a VM. And I explained a little bit of the things that happen during those processes. In this demonstration here, I just want to show you what happens during a VM stop.

So on the screen, I'm looking at the overview page for VM02. We can see that the VM is in the running state. To stop the VM through the portal, I simply click stop at the top here and then I can see I get this warning about my public IP address. What's happening here is Azure's telling me that once this machine is stopped, it's going to go into the deallocated state and when that happens, the dynamic public IP address can go away. And if I cancel out of here, I can show you why this happens.

Back on the overview page, if I click the IP address that's associated with my VM, the public IP address, we can see that the assignment is dynamic. So a dynamic public IP can go away and reset to another value when a machine is stopped and deallocated. Once that machine comes back up, that IP address can change.

Now if I set this IP to static, what'll happen is the VM may be rebooted. Now let's discard this and we'll go back out to our VM02 virtual machine. Now if we go back into the process of stopping it, again, it asks us if we want to reserve it. We'll tell it yes and then we'll stop it.

If we go ahead and click our IP here, we can see that Azure has now set it to static for us. So now, that IP address will persist throughout stops and restarts even though the VM deallocates.

If we bounce back to our VM02, we'll refresh here, we can see that it's deallocating and now that it's in a stopped state, we can see the IP address hasn't changed. If I start him back up, we can see the IP remains the same. So with that, you now know how to stop a VM from the Azure portal and you know a little bit about what happens with the public IP address.

Now one thing I do want to mention is that when a VM stops, there's a process that happens under the covers that you don't see. What happens when you click stop here, you're sending that stop signal to Microsoft Azure. At that point, what Microsoft Azure does is it sends a signal to the guest OS on that virtual machine and it gives that guest OS a chance to shut down. It's usually around 30 seconds or so.

So what it'll do is it'll allow that VM to shut down the OS. Once that OS is shut down, then Azure will come back and actually stop the VM and deallocate it. So that's why when you stop a VM and start it back up, you won't typically see any kind of errors revolving around dirty shutdowns because that's what's happening.

You're telling Azure to shut it down, Azure's going to the OS saying hey we're gonna power you off, go ahead and do your shutdown routine. The OS does the shutdown, Azure then continues through and then does the shutdown, does the stop, and then does the deallocation. So that's kind of the process that occurs when you stop a virtual machine.

About the Author
Students19738
Courses36
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Tom is a 25+ year veteran of the IT industry, having worked in environments as large as 40k seats and as small as 50 seats. Throughout the course of a long an interesting career, he has built an in-depth skillset that spans numerous IT disciplines. Tom has designed and architected small, large, and global IT solutions.

In addition to the Cloud Platform and Infrastructure MCSE certification, Tom also carries several other Microsoft certifications. His ability to see things from a strategic perspective allows Tom to architect solutions that closely align with business needs.

In his spare time, Tom enjoys camping, fishing, and playing poker.