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Troubleshoot Azure VM Extension Issues. Now recall that we service

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our VMs in Azure by using the extension model,

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which we can do in any of several ways in Azure Resource Manager. I want

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to show you how we can use Azure PowerShell, first of all, to verify

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that the Azure VM agent is correctly installed, and this is really the

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Azure VM's lifeline to Azure Resource Manager, so it's pretty important.

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We can do a Get‑AzVM, passing in the resource group name and the VM

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name, and then all of the magic happens with that ‑Status switch

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parameter.

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We can do the same thing with the Azure CLI by running az vm

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extension show. Again, resource group VM name, but it's a little

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bit different here in as much as you can, and should,

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specifically mention extension names.

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Now the questions that you might have as an AZ‑801 student are: am I really

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going to see PowerShell and CLI on my exam, and I can answer

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enthusiastically, yes. If I were studying for the exam today,

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I would probably put more of my effort on mastering

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the PowerShell than the Azure CLI,

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but you may very well see a little bit of CLI on your exam. I

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like to advise students, in general, that on the Microsoft

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Associate and Expert certification exams,

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Microsoft is assuming that you have intermediate‑level PowerShell skills

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and at least late‑beginner Azure CLI, all right? Lastly, you can, if you

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have access to the file system of your Azure VMs,

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you can take a look at local extension files and particularly look

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up log files. Those default extension log folders are

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C:\WindowsAzure\Logs\Plugins, and C:\Packages\Plugins. It's a good

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idea for you to know where those paths are so that if you're

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troubleshooting extension misbehavior, you can get as much log data out of the VM as possible.