<#
.SYNOPSIS 
This script will connect to vSphere through PowerCLI and using PowerShell, it will return information about the alerts:

        Will Return Something Like This!
        CRITICAL! Datastore AX4-1 > CapacityGB: 1003GB > FreeSpaceGB: 205GB 
        WARNING! Datastore AX4-1 > CapacityGB: 1003GB > FreeSpaceGB: 205GB 
        OK! Datastore AX4-1 > CapacityGB: 1003GB > FreeSpaceGB: 205GB 

.NOTES
     Author     : Pedro Simões <pedro#mirandasimoes.eu>
.LINK
     http://blog.mirandasimoes.eu

.PARAMETER Server
    Server Full Address or Machine Name

.PARAMETER CredentialFilePath
    Path For Credential File Generated by Function New-VICredentialStoreItem
    a Password file can be Generated By » New-VICredentialStoreItem -Host $VIServer -User $user -Password $password -File $CredentialFilePath
.PARAMETER Name
    Datastore Name
.PARAMETER W
    Return Warning in GB
.PARAMETER C
    Return Critical in GB

.EXAMPLE
    .\check_vmware_triggeredalarms.ps1 -Server VCENTER -Name DataStore-Name -W 50 -C 10

.EXAMPLE 
    .\check_vmware_triggeredalarms.ps1 -Server VCENTER -CredentialFilePath .\nagios.monitor.xml  -Name DataStore-Name -W 50 -C 10

.EXAMPLE
    .\check_vmware_triggeredalarms.ps1 -Server VCENTER -User monitor.user -Password MyPassword -Name DataStore-Name -W 50 -C 10

#>

param (
	[String] $Server,
    [String] $CredentialFilePath,
    [String] $User,
    [String] $Password,
    [String] $Name,
    [String] $W,
    [String] $C
)
<#
if ( !(Get-Module -Name VMware.VimAutomation.Core -ErrorAction SilentlyContinue) ) {
    if (Test-Path -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\VMware, Inc.\VMware vSphere PowerCLI' ) {
        $Regkey = 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\VMware, Inc.\VMware vSphere PowerCLI'
       
    } else {
        $Regkey = 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\VMware, Inc.\VMware vSphere PowerCLI'
    }
    . (join-path -path (Get-ItemProperty  $Regkey).InstallPath -childpath 'Scripts\Initialize-PowerCLIEnvironment.ps1')
}
if ( !(Get-Module -Name VMware.VimAutomation.Core -ErrorAction SilentlyContinue) ) {
    Write-Host "VMware modules not loaded/unable to load"
    Exit 99
}


Get-Module -Name VMware* -ListAvailable | Import-Module
#>
Import-Module VMware.VimAutomation.Core

if ($CredentialFilePath) {
    $CredentialFilePath = $CredentialFilePath -replace "`n","" -replace "\""","" # Fix for NCPA
    $cred = Get-VICredentialStoreItem -Host $Server -File $CredentialFilePath -ErrorAction stop
    $vc = Connect-VIServer -Server $Server -User $cred.User -Password $cred.Password  -ErrorAction stop
}elseif ( $User -ne $null -and $Password -ne $null ) {
    $vc = Connect-VIServer -Server $Server -User $User -Password $Password  -ErrorAction stop
}
else {
    $vc = Connect-VIServer $Server
}

 
if (!$vc) {
    Write-Output "Failure connecting to the vCenter $Server."
    exit 3
}


$DS = Get-Datastore -Name $Name


$RT = 3 #UNKNOWN
if ( $DS.FreeSpaceGB -lt $C ) 
{
    #RT CRITICAL
    Write-Host "CRITICAL! Datastore $Name > CapacityGB: $([math]::Round($DS.CapacityGB))GB > FreeSpaceGB:$([math]::Round($DS.FreeSpaceGB))GB " 
    $rt = 2
}

if ($DS.FreeSpaceGB -gt $C -and $DS.FreeSpaceGB -lt $W) 
{
    #RT WARNING
    Write-Host "WARNING! Datastore $Name > CapacityGB: $([math]::Round($DS.CapacityGB))GB > FreeSpaceGB: $([math]::Round($DS.FreeSpaceGB))GB " 
    $rt = 1
}

if ($DS.FreeSpaceGB -gt $C -and $DS.FreeSpaceGB -gt $W ) 
{
    #RT OK
    Write-Host "OK! Datastore $Name > CapacityGB: $([math]::Round($DS.CapacityGB))GB > FreeSpaceGB: $([math]::Round($DS.FreeSpaceGB))GB " 
    $rt = 0
}

#Write-Verbose -Verbose $countTotalAlarms.Count

Disconnect-VIServer $Server -Confirm:$false
exit $rt