Saturday, January 23, 2021

How to Re-deploy an Azure VM from Portal/PowerShell or Azure CLI

In some circumstances, as part of troubleshooting, where you are having a connectivity-related issue or agent/extension status related issue and think that this could be related to the underlying host on which this VM is running we use VM redeployment option. This VM redeployment is nothing but a process of changing the physical host where your VM is currently running.

When you redeploy a VM, Azure will shut down the VM, move the VM to a new host within the Azure infrastructure, and then power it back on, retaining all your configuration options and associated resources.

If you are coming from VMware background then this might surprise you as there you can simply vMotion a running VM from one Esxi host to another however here this is the only option to so.

The Azure redeploy operation does not impact any settings or configuration of the affected VM. However, you may lose the data on the temp drive and if using Dynamic IP then the same would also change. To avoid the IP change you can mark the assigned IP as static from vNIC settings. 

You can re-deploy a VM either directly from with VM blade on the Azure portal or using PowerShell and Azure CLI.

Azure Portal:
  1. Go to affected VM
  2. on VM blade look for VM redeploy option under Support & Troubleshooting
  3. Redeploy the VM using the re-deploy option

PowerShell: Use the following to re-deploy a VM.
#first you need to connect to your Azure account


#Get the list of Subscriptions availabe in your Azure account


#Set the desired subscription as default

Select-AzSubscription -Subscription "Subscription name"

#Set the required variable to make this scriprt reusable

$rgName = read-host "Enter the resourceGroup name where this VM reside"

$vmName = read-host "Enter the VM name"

Set-AzVM -Name $vmName ResourceGroupName $rgName -redeploy

Azure CLI: First connect to your account, set the respective subscription as default,
#first you need to connect to your Azure account
az login
#List Subscription in your Azure account
az account list --output table
#to set your Subscription as default for this session
az account set --subscription "Name of your Subscription
az vm redeploy -name "name of the VM" -group "resource group name"
During VM redeployment operation the Status of the VM changes to Updating as the VM prepares to redeploy and then changes to Starting as the VM boots up on a new Azure host.

Related demo: 

That's it...Thanks :)

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