Last Reboot time for all Vm's

Question

Last Reboot time for all Vm's

Veerpal Singh 31

Looking for a Powershell script that can provide the Last reboot time of all the servers in Azure. Any other alternatives as well?

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Answer 1

Hello, @Veerpal Singh !

Looking for a PowerShell script that provides all the reboot logs? I would use Get-AzureDeploymentEvent or Get-CimInstance with lastbootuptime.

Get-AzureDeploymentEvent

https://azure.microsoft.com/en-us/blog/viewing-vm-reboot-logs/

To help determine whether the reboot you observed on your Virtual Machine is due to a Planned Maintenance event, we’re introducing a new API that provides logs that show when your VM was rebooted. This can be accessed in the Portal under "View Reboot Logs" or by running the following query in PowerShell:

$today = get-date  
$yest = $today.AddDays(-1)  
Get-AzureDeploymentEvent -ServiceName kenaztestdemoservice -StartTime $yest -EndTime $today

Get-CimInstance

https://devblogs.microsoft.com/scripting/powertip-get-the-last-boot-time-with-powershell/

Another approach would be to use Get-CimInstance with LastBootUpTime:

Get-CimInstance -ClassName win32_operatingsystem | select csname, lastbootuptime

An approach used by Improve Scripting is to create a list of servers in a text file and then run the following:

https://www.improvescripting.com/get-the-last-boot-time-using-powershell-script/

Get-CimInstance -ComputerName (Get-Content -Path 'C:\Temp\servers.txt') -Class CIM_OperatingSystem -ErrorAction Stop | Select-Object CSName, LastBootUpTime | Out-GridView

Additional Options
If you are still looking for more options, Shell Geek has a pretty good list of available approaches including net statistics workstation and system info (optionally using /S for server name):

https://shellgeek.com/get-last-boot-time-of-computer-using-powershell

EnterpriseArchitect 6,041 Reputation points

2024-01-30T23:38:50.7733333+00:00

@kobulloc-MSFT ,
Thanks for sharing, however, the cmdlet Get-AzureDeploymentEvent is for the older resource deployed in Azure https://learn.microsoft.com/en-us/powershell/module/servicemanagement/azure/get-azuredeploymentevent?view=azuresmps-4.0.0

Is there any updated command for the Get-Az* command instead?
EnterpriseArchitect 6,041 Reputation points

2024-01-30T23:39:35.6333333+00:00

@kobulloc-MSFT ,
The Get-CIM instance will not work if the Azure VM is not joined to the same AD domain as the executor.
kobulloc-MSFT 26,811 Reputation points Microsoft Employee Moderator

2024-02-01T02:14:05.5133333+00:00

Thank you, @EnterpriseArchitect! I'm adding a link to the most up to date thread that you've posted: https://learn.microsoft.com/en-us/answers/questions/1519274/how-to-get-the-report-of-which-azure-vm-was-reboot

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Last Reboot time for all Vm's

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