Hectic day ahead after reading a list of VMware KB articles on how to improve the virtual machine performance. I am surprise that there are some little tweak here and there to improve a virtual environment and half the time Administrator took the virtual environment for granted. Everything is virtual in the cloud and expect the cloud to remain as just a pure white cloud expecting environment maintenance negligence will never lead to a stormy day.
Reading on these VMware KB articles, I found consistent emphasize on removing unused removable devices or configuration that will cause a bit of poor generic performance of an individual virtual machine which in theory it should fine if only when your cloud environment is relatively small. But the logic of having a cloud environment is to have more virtual machine running in a shared resource to maximise the output with minimum cost overhead on hardware. Hmmmm…
Eventually, an audit to find out all the VMware CD Drive attached to those virtual machines are configured according to Best Practises is required which lead to developing this Get-VMWareCDDrive script that I am happy to share. I have also included the VMware KB Article links in the PowerShell Comment Code section as a reference guide.
Hope all the cloud administrators out there will like this. Goodnight to all those hardworking midnight coders. I might post another script to get virtual Floppy Drive configuration information tomorrow if I’m not too tired.
Download Link – http://gallery.technet.microsoft.com/Get-VMWareCDDrive-b506e100
function Get-VMwareCDDrive {
<#
.SYNOPSIS
Get the VMWare Virtual Machine virtual CD Drive configuration information.
.DESCRIPTION
Allows the administrator to get the virtual CD Drive configuration information
on the virtual machine from VMWare vCenter.
.PARAMETER ComputerName
ALIAS -VI
This parameter specify host connection to the VMWare vCenter
.PARAMETER GuestName
ALIAS -Guest
This parameter allows administrator to specify the VM Guest name
.PARAMETER Username
ALIAS -U
This parameter allows administrator to specify username to authenticate with the server.
.PARAMETER Password
ALIAS -P
This paramter allows administrator to specify the password to authenticate with the server.
.EXAMPLE
This example demostrate how to import the Get-VMWareCDDrive.psm1 module and use the command
to query the VMWare vCenter for VMWare virtual CD Drive information on guest virtual machine
name VM1 that has 2 virtual CD Drives.
Import-Module C:\Windows\System32\WindowsPowerShell\v1.0\Modules\Get-VMWareCDDrive.psm1
Get-VMWareCDDrive -VI VMWarevCenter -U Redmond\VirtualCenterAdministrator -P C0nt0s0 -Guest VM1
GuestName : VM1
VMHost : esx11.redmond.com
UUID : 5070f400-8066-f583-5364-785c6fc346fd
OperatingSystem : Microsoft Windows 8 (64-bit)
PowerState : PoweredOff
NumberOfCDDrives : 2
ChangeVersion : 2013-10-14T22:02:46.292876Z
DeviceName : CD/DVD drive 2
IsoPath : [MSFT_PROD_VMFS_T1_3PAR_11] MS ISO/Windows 8.1/en_windows_8_1_enterprise_x64_dvd_2791088.iso
HostDevice :
RemoteDevice :
Connected : False
StartConnected : True
AllowGuestControl : True
Status : untried
GuestName : VM1
VMHost : esx11.redmond.com
UUID : 5070f400-8066-f583-5364-785c6fc346fd
OperatingSystem : Microsoft Windows 8 (64-bit)
PowerState : PoweredOff
NumberOfCDDrives : 2
ChangeVersion : 2013-10-14T22:02:46.292876Z
DeviceName : CD/DVD drive 1
IsoPath :
HostDevice : No Devices available
RemoteDevice :
Connected : False
StartConnected : False
AllowGuestControl : True
Status : untried
.EXAMPLE
This example demostrate how to generate a report of all the VMWare virtual CD Drive information
for each virtual machine in VMWare vCenter and export to a CSV file.
Get-VMWareCDDrive -ComputerName VMWarevCenter | Export-Csv C:\Temp\Get-VMWareCDDrive.csv -NoTypeInformation
.NOTES
Title : PowerShell Get VMWare virtual CD Drive
FileName: Get-VMWareCDDrive.psm1
Author : Ryen Kia Zhi Tang
Date : 15/10/2013
Blog : ryentang.blogspot.com
Version : 1.0
Change Log
16/10/2013 - Added Disconnect-VIServer to disconnect from vCenter cleanly.
Added Remove-PSSnapin to remove VMWare PowerShell CLI cleanly.
#>
param(
[Parameter(
Mandatory=$True,
ValueFromPipeline=$True,
ValueFromPipelineByPropertyName=$True)]
[Alias('VI')]
[String] $ComputerName = $env:COMPUTERNAME,
[Parameter(
Mandatory=$False,
ValueFromPipeline=$True,
ValueFromPipelineByPropertyName=$True)]
[Alias('U')]
[String] $Username,
[Parameter(
Mandatory=$False,
ValueFromPipeline=$True,
ValueFromPipelineByPropertyName=$True)]
[Alias('P')]
[String] $Password,
[Parameter(
Mandatory=$False,
ValueFromPipeline=$True,
ValueFromPipelineByPropertyName=$True)]
[Alias('Guest')]
[String] $GuestName
)
BEGIN {}
PROCESS {
# Add VMWare PowerCLI PSSnapin
Add-PSSnapin VMware.VimAutomation.Core
# Verify Username and Password parameter is not null and construct PSCredential object for authentication
if(($Username -ne "") -and ($Password -ne "")){
# Construct Credential
$PWD = convertto-securestring $Password -asplaintext -force
$Credential = New-Object -TypeName System.Management.Automation.PSCredential -ArgumentList $Username,$PWD
# Establish connection using Credential Object
$Connection = Connect-VIServer -Server $ComputerName -Credential $Credential -Force -Verbose
# Verify Username and Password parameter is null and use Windows Integrated Authentication
}else{
# Establish connection using Windows Integrated Authentication
$Connection = Connect-VIServer -Server $ComputerName -Force -Verbose
}
# Verify GuestName parameter is not null
if($GuestName -ne "") {
# Get specific VM Guest
$VMs = Get-VM -Name $GuestName
}else{
# Get all VM Guests
$VMs = Get-VM
}
# Construct Result
foreach($VM in $VMs) {
foreach($vCDDrive in $(Get-CDDrive -VM $VM.Name)) {
$VM | Select @{L='GuestName';E={($_.Name)}},
@{L='VMHost';E={($VM.VMHost)}},
@{L='UUID';E={(((($VM).ExtensionData).Config).Uuid)}},
@{L='OperatingSystem';E={((($VM).Guest).OSFullName)}},
@{L='PowerState';E={($VM.PowerState)}},
@{L='NumberOfCDDrives';E={((Get-CDDrive -VM $VM.Name | Measure-Object).Count)}},
@{L='ChangeVersion';E={(((($VM).ExtensionData).Config).ChangeVersion)}},
@{L='DeviceID';E={($vCDDrive.ID)}},
@{L='DeviceName';E={($vCDDrive.Name)}},
@{L='IsoPath';E={($vCDDrive.IsoPath)}},
@{L='HostDevice';E={($vCDDrive.HostDevice)}},
@{L='RemoteDevice';E={($vCDDrive.RemoteDevice)}},
@{L='Connected';E={(((($vCDDrive).ExtensionData).Connectable).Connected)}},
@{L='StartConnected';E={(((($vCDDrive).ExtensionData).Connectable).StartConnected)}},
@{L='AllowGuestControl';E={(((($vCDDrive).ExtensionData).Connectable).AllowGuestControl)}},
@{L='Status';E={(((($vCDDrive).ExtensionData).Connectable).Status)}}
}
}
}
END { Disconnect-VIServer -Server $ComputerName -Confirm:$FALSE ; Remove-PSSnapin VMware.VimAutomation.Core }
}
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