Our virtualization environment uses a SAN backend as most do. We run exclusively in NFS (NAS) mode. This has numerous advantages (an explanation of which is outside the scope of this post). I like to keep a rough idea of the gains and losses of each NFS share on a daily basis.
I run the following script automatically each day and it emails me the details of the gains or losses due to systems being added or removed. I included a "noupdate" option that allows testing without processing the files. That way you can rerun using the current file again and again for testing.
Results are very basic and color coded for gain/loss. The raw dump files are stored in the script folder. I have another process I use to import them into Excel and graph them over time. If I get a chance I'll post that as well.
NOTE: This NOT the current version. I am keeping current versions on the MS PowerShell Gallery at: https://www.powershellgallery.com/profiles/Kcmjr/.
<#======================================================================================
File Name : Datastore-Tracker.ps1
Original Author : Kenneth C. Mazie (kcmjr AT kcmjr DOT com)
:
Description : Tracks SAN datastores over
time. Emails a daily report on changes.
:
Notes : Normal operation is with
no command line options. Basic logs are
written to C:\Scripts
: Optional argument:
-Console $true (defaults to false)
: -NoUpdate $true (runs with
current files and doesnt replace them for debugging)
:
Warnings : The script is coded to
switch colors between 2 vCenters. Adjust
as
: needed below where commented if
you use more or less.
:
Legal : Public Domain. Modify and
redistribute freely. No rights reserved.
: SCRIPT PROVIDED "AS
IS" WITHOUT WARRANTIES OR GUARANTEES OF
: ANY KIND. USE AT YOUR OWN
RISK. NO TECHNICAL SUPPORT PROVIDED.
:
Credits : Code snippets and/or ideas
came from many sources including but
: not limited to the following:
: Based on "Track Datastore Space
script" Created by Hugo Peeters of www.peetersonline.nl
:
Last Update by : Kenneth C. Mazie
Version History : v1.0 - 09-16-14 - Original
Change History : v1.1 - 08-28-15 - Edited to allow color coding of HTML
output
:
#=======================================================================================#>
#requires -version 3.0
Param(
[bool]$Console = $False,
[bool]$NoUpdate = $False
)
If ($Console){$Script:Console = $true}
#--[ Uncomment to programatically
hide the console ]--
#Add-Type -Name Window -Namespace
Console -MemberDefinition '
#[DllImport("Kernel32.dll")]
#public static extern IntPtr
GetConsoleWindow();
#
#[DllImport("user32.dll")]
#public static extern bool
ShowWindow(IntPtr hWnd, Int32 nCmdShow);
#'
#$Script:consolePtr =
[Console.Window]::GetConsoleWindow()
#[Console.Window]::ShowWindow($Script:consolePtr,
0)
Clear-host
$Script:Body = ""
$ErrorActionPreference = "silentlycontinue"
#--[ Excel Non-Interactive Fix
]------------------------------------------------
If (!(Test-path -Path "C:\Windows\System32\config\systemprofile\Desktop")){New-Item -Type Directory -Name "C:\Windows\System32\config\systemprofile\Desktop"}
If (!(Test-path -Path "C:\Windows\SysWOW64\config\systemprofile\Desktop")){New-Item -Type Directory -Name "C:\Windows\SysWOW64\config\systemprofile\Desktop"}
#--[ Excel will crash when run non-interactively via
a scheduled task if these folders don't exist ]--
#-------------------------------------------------------------------------------
#--[ NOTE: The script is set up for two
vCenters. Adjust the coloring below if
you have more or less ]--
$Script:vCenters = @("vCenter1","vCenter2")
#-------------------------------------------------------------------------------
If ($Script:NoUpdate){
$Script:CurrentFile = $Script:PSScriptRoot+'\Temp_Current.xml'
$Script:PreviousFile = $Script:PSScriptRoot+'\Datastores_Previous.xml'
$Script:DifferenceFile = $Script:PSScriptRoot+'\Temp_Difference.txt'
}Else{
$Script:CurrentFile = $Script:PSScriptRoot+'\Datastores_Current.xml'
$Script:PreviousFile = $Script:PSScriptRoot+'\Datastores_Previous.xml'
$Script:DifferenceFile = $Script:PSScriptRoot+'\Datastores_Difference.txt'
}
If (Test-Path $Script:DifferenceFile) {rm $Script:DifferenceFile -Confirm:$false -Force}
If (!(Get-PSSnapin | ? {$_.name -like “vmware.vimautomation.core”})) {Add-PSSnapin vmware.vimautomation.core}
$Script:Digits = 2
$Script:From = "DailyRepoprts@mydomain.com" #--[ Who the
email is being sent by ]--
$Script:UserName = "mydomain\username" #--[ The user to
connect to vCenter with ]--
$Script:Password = "userpassword" #--[ That users
password ]--
$Script:EmailTargets = "user1.domain.com,
user2.domain.com" #--[ a comma
seperated list of email recipients ]--
$Script:SMTPServer = "HostName.domain.int" #--[ what SMTP
server to use ]--
Function SendEmail ($Script:OutBody){ #--[ Email
settings ]--
$Script:HTML = $true
$Script:Email = new-object System.Net.Mail.MailMessage
$Script:Email.From = $Script:From
$Script:Email.To.Add($Script:EmailTargets)
$Script:Email.Subject = "SAN Daily
Utilization Status"
$Script:Email.IsBodyHtml = $true
$Script:Email.Body = $Script:ReportBody
$Script:smtp = new-object System.Net.Mail.SmtpClient($Script:SMTPServer)
$Script:smtp.Send($Script:Email)
}
#--[ Add header to html log file
]----------------------------------------------
$Script:ReportBody = @()
$Script:ReportBody += '
<style
type="text/css">
table.myTable
{ border:5px solid black;border-collapse:collapse; }
table.myTable td { border:2px solid
black;padding:5px}
table.myTable
th { border:2px solid black;padding:5px;background: #949494 }
table.bottomBorder
{ border-collapse:collapse; }
table.bottomBorder
td, table.bottomBorder th { border-bottom:1px dotted black;padding:5px; }
</style>
<left><h1> -
SAN Volume Utilization Report -</h1></left>
The following report displays the
current SAN volume usage and the percent of<br>
change from yesterdays
usage. The raw data files are retained
with the script<br>
for use in long term utilization
tracking purposes.<br><br>'
$Script:ReportBody += '<table
class="myTable"><tr><th>vCenter</th><th>Volume
Name</th><th>Percent Free</th><th>Difference</th></tr>'
If (!(Test-Path "$PSScriptRoot\creds.txt")){
$Script:Credential = Get-Credential
$Script:Credential.Password | ConvertFrom-SecureString | Set-Content "$PSScriptRoot\creds.txt"
}
#--[ Use if you need to use a
credential file, otherwise current creds are used ]--
#$Encrypted = Get-Content
"$Folder\creds.txt" | ConvertTo-SecureString
#$Credential = New-Object
System.Management.Automation.PsCredential($Username, $Encrypted)
#$LogFileName =
"SAN-Vol_{0:MM-dd-yyyy_mm}_Stats.log" -f (Get-Date)
$Script:myColCurrent = @() #--[ Create an
array to hold the output ]--
ForEach ($Script:VIServer in $Script:vCenters){
If ($Script:Console){Write-Host "`r`nProcessing:
$Script:VIServer" -ForegroundColor Cyan}
$Script:VC = Connect-VIServer -Server $Script:VIServer -user $Script:UserName -pass $Script:Password #-Credential
$Script:Credential #--[ Connect to Virtual Center ]--
$Script:datastores = Get-Datastore | Sort-Object Name | Select -Unique #--[ Get all datastores and put them in
alphabetical order & remove accidental duplicates ]--
ForEach ($Script:store in $Script:datastores) #--[ Loop through datastores ]--
if ($Script:store -notlike "*Local*"){
$Script:myObj = "" | Select-Object vCenter, Name,
CapacityGB, UsedGB, PercFree #--[ Create a
custom object and define its properties ]--
#--[ Set the
values of each property ]--
$Script:myObj.vCenter = $Script:VIServer
$Script:myObj.Name = $Script:store.name
$Script:myObj.CapacityGB = [math]::Round($Script:store.capacityMB/1024,$Script:digits)
$Script:myObj.UsedGB = [math]::Round(($Script:store.CapacityMB - $Script:store.FreeSpaceMB)/1024,$Script:digits)
$Script:myObj.PercFree = [math]::Round(100*$Script:store.FreeSpaceMB/$Script:store.CapacityMB,$Script:digits)
$Script:myColCurrent += $Script:myObj
#--[ Add the
object to the output array ]--
}
}
Disconnect-VIServer -Confirm:$False #--[ Disconnect from Virtual
Center ]--
}
$Script:myColCurrent | Export-Clixml -Path $Script:CurrentFile #--[ Export the
output to an xml file; the new Current file ]--
$Script:CurrentDate = (Get-Item $Script:CurrentFile).LastWriteTime #--[ Get file dates for new file
names ]--
$Script:PreviousDate = (Get-Item $Script:PreviousFile).LastWriteTime
#--[Compare the Current
information to that in the Previous file ]--------------
If (Test-Path $Script:PreviousFile){ #--[ Check if a Previous file exists ]--
$Script:myColPrevious = Import-Clixml $Script:PreviousFile #--[ Import the
Previous file ]--
$Script:myColCurrent= Import-Clixml $Script:CurrentFile #--[ Import the
Previous file ]--
$Script:myColDiff = @() #--[ Create an
array to hold the differences ]--
ForEach ($Script:myObjCurrent in $Script:myColCurrent){ #--[ Loop through
the current datastores ]--
$Script:VCCurrent = $Script:myObjCurrent.vCenter
$Script:RowData = ""
$Script:diff = Compare-Object ($Script:myColPrevious | Where { $_.Name -eq $Script:myObjCurrent.Name }) $Script:myObjCurrent -Property PercFree # The actual compare command
$Script:myObjDiff = "" | Select-Object vCenter,
VolName, PercentFree, Diff #--[ Create a
custom object and properties for outputting results ]--
$Script:myObjDiff.vCenter = $Script:myObjCurrent.vCenter #--[ Setting the
values of each property ]--
$Script:myObjDiff.VolName = $Script:myObjCurrent.Name
$Script:myObjDiff.PercentFree = $Script:myObjCurrent.PercFree
#--[ The most
important property is the calculated difference between the current and
previous values of PercFree. You can substitute it for UsedGB if you like. ]--
$Script:myObjDiff.Diff = ($Script:diff | Where { $_.SideIndicator -eq '=>' }).PercFree - ($Script:diff | Where { $_.SideIndicator -eq '<=' }).PercFree
If (($Script:myObjDiff.Diff -eq "") -or ($Script:myObjDiff.Diff -eq $null)){$Script:myObjDiff.Diff = "0.00"}
$Script:myColDiff += $Script:myObjDiff #--[ Adding it to the output array ]--
$Script:BGColor = "#dfdfdf" #--[ Grey cell
background ]--
$Script:RowData += '<tr>'
if($Script:VCCurrent -eq "vcenter1"){ #--[ NOTE: Tweak
this name to keep colors rotating ]--
$Script:FGColor = "#408080" #--[ Color to
distinguish 1st vCenter ]--
}ElseIf($Script:VCCurrent -eq "vcenter2"){ #--[ NOTE: Tweak
this name to keep colors rotating ]--
$Script:FGColor = "#808000" #--[ Color to
distinguish 2nd vCenter ]--
}Else{
$Script:FGColor = "#000000" #--[ Default
color, black ]--
}
$Script:RowData += '<td
bgcolor=' + $Script:BGColor + '><font color=' + $Script:FGColor + '>' + $Script:myObjDiff.vCenter + '</td>'
$Script:FGColor = "#000000"
$Script:RowData += '<td
bgcolor=' + $Script:BGColor + '><font color=' + $Script:FGColor + '>' + $Script:myObjDiff.VolName + '</td>'
$Script:RowData += '<td
bgcolor=' + $Script:BGColor + '><font color=' + $Script:FGColor + '>' + $Script:myObjDiff.PercentFree + '</td>'
If ($Script:myObjDiff.Diff -eq "0.00"){
$Script:FGColor = "#000000" #--[ Black
foreground for no change ]--
$Script:RowData += '<td
bgcolor=' + $Script:BGColor + '><font color=' + $Script:FGColor + '>' + $Script:myObjDiff.Diff
}ElseIf ($Script:myObjDiff.Diff -lt 0){
$Script:FGColor = "#700000" #--[ Red
foreground for storage loss]--
$Script:RowData += '<td
bgcolor=' + $Script:BGColor + '><font color=' + $Script:FGColor + '><strong>' + $Script:myObjDiff.Diff + '</strong>'
}Else{
$Script:FGColor = "#007000" #--[ Green
foreground for storage gain ]--
$Script:RowData += '<td
bgcolor=' + $Script:BGColor + '><font color=' + $Script:FGColor + '><strong>' + $Script:myObjDiff.Diff + '</strong>'
}
$Script:RowData += '</td></tr>'
$Script:ReportBody += $Script:RowData
Clear-Variable diff -ErrorAction "SilentlyContinue" #--[ Clearing the variable used inside
the loop to prevent incorrect output in case of problems setting the variable!
]--
}
If ($Script:myColDiff.Length -eq 0){$Script:myColDiff = "No changes
since last check."} #--[ If nothing changed, we don't want an empty file. ]--
$Script:myColDiff | Format-Table -AutoSize | Out-File $Script:DifferenceFile -Force -Append #--[ And we
conclude by outputting the results to a text file, which can be emailed or
printed. ]--
}
If ($Script:myColDiff.Length -ne 0){
(Get-Content $Script:DifferenceFile) | Where { $_ } | Set-Content $Script:DifferenceFile
(Get-Content $Script:DifferenceFile) | Where {$_ -notmatch '----'} | Set-Content $Script:DifferenceFile
Add-Content $Script:DifferenceFile –value "`nCurrent-Report
$Script:CurrentDate `nPrevious-Report $Script:PreviousDate
"
$Script:FGColor = "#000000"
$Script:BGColor = "#bbbbbb"
$Script:RowData += '<tr>'
$Script:RowData += '<td
bgcolor=' + $Script:BGColor + '><font color=' + $Script:FGColor + '>Current
Report</td>'
$Script:RowData += '<td
bgcolor=' + $Script:BGColor + '><font color=' + $Script:FGColor + '>' + $Script:CurrentDate + '</td>'
$Script:RowData += '<td
bgcolor=' + $Script:BGColor + '><font color=' + $Script:FGColor + '>Previous
Report</td>'
$Script:RowData += '<td
bgcolor=' + $Script:BGColor + '><font color=' + $Script:FGColor + '>' + $Script:PreviousDate + '</td>'
$Script:RowData += '</tr>'
$Script:ReportBody += $Script:RowData
}
$Script:ReportBody += '</table><br><br>'
<#--[ Enable this section to
add notes to the bottom of the report. ]--
$Script:ReportBody += '
<ul>
<li>Only powered-on Vms are shown since the script relies on WMI
to get the block size.</li>
<li>"Vol",
or "Volume" refers to a Windows disk partition.</li>
<li>The
hidden system partition, which is typically Vol 0 on Disk 0, is not
shown.</li>
<li>Disk
numbers are assigned beginning with 0 (zero).</li>
<li>Partition
numbers are assigned beginning with 1 (not 0).</li>
</ul>'
#>
$Script:OutBody = Get-Content $Script:DifferenceFile #| Out-String
SendEmail $Script:OutBody
If ($Script:Console){Get-Content $Script:DifferenceFile | Out-String}
#--[ Cleanup ]--
$Script:attachment.Dispose()
$Script:msg.Attachments.Dispose()
$Script:msg.Dispose()
$Script:smtp.Dispose()
If ($Script:NoUpdate){
If (Test-Path $Script:DifferenceFile){Remove-Item -Path $Script:DifferenceFile -force}
If (Test-Path $Script:CurrentFile){Remove-Item -Path $Script:CurrentFile -force}
}Else{
If (Test-Path $Script:DifferenceFile){rename-Item -Path $Script:DifferenceFile -newname ("$PSScriptRoot\SAN-Vol_{0:MM-dd-yyyy}_Diff.log" -f (Get-Date))}
If (Test-Path $Script:PreviousFile){Remove-Item -Path $Script:PreviousFile -Force} #If a Previous file exists remove it
If (Test-Path $Script:CurrentFile){Copy-Item -Path $Script:CurrentFile -Destination ("$PSScriptRoot\SAN-Vol_{0:MM-dd-yyyy}_Stats.xml" -f (Get-Date))}
If (Test-Path $Script:CurrentFile){Rename-Item -Path $Script:CurrentFile -NewName $Script:PreviousFile} # If a Current
file exists, rename this Current file to Previous
}
$Script:Credential = ""
$Script:CurrentFile = ""
$Script:PreviousFile = ""
$Script:DifferenceFile = ""
$Script:OutBody = ""
If ($Script:Console){Write-Host '--- Completed
---'}
#iex '$PSScriptRoot\reload.bat' #--[ Used for input file refresh while
debugging ]--
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