VMware Host Datastore Reference Relationship Discovery

Community.VMware.Discovery.HostDatastoreReference (Discovery)

PowerShell script that connects to SCOM to discover Host Datastore Reference Relationships

Element properties:

Object Discovery Details:

Member Modules:

Source Code:

<Discovery ID="Community.VMware.Discovery.HostDatastoreReference" Target="Community.VMware.Class.vCenter" Enabled="true" ConfirmDelivery="false" Remotable="true" Priority="Normal">

  <Category>Discovery</Category>

  <DiscoveryTypes>

    <DiscoveryRelationship TypeID="Community.VMware.Relationship.HostReferencesDatastore"/>

  </DiscoveryTypes>

  <DataSource ID="DS" TypeID="Windows!Microsoft.Windows.TimedPowerShell.DiscoveryProvider" RunAs="Community.VMware.SecureReference.RunAsProfile">

    <IntervalSeconds>7200</IntervalSeconds>

    <SyncTime>01:15</SyncTime>

    <ScriptName>Community.VMware.Discovery.HostDatastoreReference.ps1</ScriptName>

    <ScriptBody><Script>param($sourceId,$managedEntityId,$vCenterServerName)



Function ExitPrematurely ($Message) {

	$discoveryData.IsSnapshot = $false

	$api.LogScriptEvent($ScriptName,1985,2,$Message)

	$discoveryData

	exit

}



Function LogScriptEvent {

	Param (

		

		#0 = Informational

		#1 = Error

		#2 = Warning

		[parameter(Mandatory=$true)]

		[ValidateRange(0,2)]

		[int]$EventLevel

		,

		

		[parameter(Mandatory=$true)]

		[string]$Message

	)



	$api.LogScriptEvent($ScriptName,1985,$EventLevel,$Message)

}



Function DefaultErrorLogging {

	LogScriptEvent -EventLevel 1 -Message ("$_`rType:$($_.Exception.GetType().FullName)`r$($_.InvocationInfo.PositionMessage)`rReceivedParam:`rsourceId:$sourceId`rmanagedEntityId:$managedEntityId`rvCenterServerName:$vCenterServerName")

}



$ScriptName = 'Community.VMware.Discovery.HostDatastoreReference.ps1'

$api = new-object -comObject 'MOM.ScriptAPI'

$discoveryData = $api.CreateDiscoveryData(0, $sourceId, $managedEntityId)



Try {Import-Module OperationsManager}

Catch {DefaultErrorLogging}



Try {New-SCOMManagementGroupConnection 'localhost'}

Catch {DefaultErrorLogging}



Try {$MGconn = Get-SCOMManagementGroupConnection | Where {$_.IsActive -eq $true}}

Catch {DefaultErrorLogging}



If(!$MGconn){

	ExitPrematurely ("Unable to connect to the local management group")

}



#Get Already Discovered VM Hosts from SCOM

Try {$VMhostObjs = Get-SCOMClass -Name 'Community.VMware.Class.Host' | Get-SCOMClassInstance | Where {$_.'[Community.VMware.Class.vCenter].vCenterServerName'.Value -eq $vCenterServerName}}

Catch {DefaultErrorLogging}



#Exit if no VMs are discovered, because there is no relationship to build

If (!$VMhostObjs){

	ExitPrematurely ("No VM Hosts found discovered in SCOM for vCenter " + $vCenterServerName)

}



#Get Already Discovered Datastores from SCOM

Try {$VMdatastoreObjs = Get-SCOMClass -Name 'Community.VMware.Class.Datastore' | Get-SCOMClassInstance | Where {$_.'[Community.VMware.Class.vCenter].vCenterServerName'.Value -eq $vCenterServerName}}

Catch {DefaultErrorLogging}



If (!$VMdatastoreObjs){

	ExitPrematurely ("No VM Datastores found discovered in SCOM for vCenter " + $vCenterServerName)

}



Try {

	Add-PSSnapin VMware.VimAutomation.Core

} Catch {

	Start-Sleep -Seconds 10

	Try {

		Add-PSSnapin VMware.VimAutomation.Core

	} Catch {

		DefaultErrorLogging

		Exit

	}

}



Try {

	$connection = Connect-VIServer -Server $vCenterServerName -Force:$true -NotDefault

} Catch {

	Start-Sleep -Seconds 10

	Try {

		$connection = Connect-VIServer -Server $vCenterServerName -Force:$true -NotDefault

	} Catch {

		DefaultErrorLogging

	}

}



If ($connection.IsConnected -ne $True){

	ExitPrematurely ("Unable to connect to vCenter server " + $vCenterServerName)

}



Try {$VMwareHosts = (Get-View -Server $connection -ViewType HostSystem -Property Datastore) | Select Datastore,MoRef}

Catch {DefaultErrorLogging}



If (!$VMwareHosts){

	Try {Disconnect-VIServer -Server $connection -Confirm:$false}

	Catch {DefaultErrorLogging}

	ExitPrematurely ("No VMs found in vCenter " + $vCenterServerName)

}



ForEach ($VMhost in $VMwareHosts){



	If ($VMhostObjs | Where {$_.'[Community.VMware.Class.Host].HostId'.Value -eq [string]$VMhost.MoRef}){



		#VM Host Obj (already discovered)

		$VMhostInstance = $discoveryData.CreateClassInstance("$MPElement[Name='Community.VMware.Class.Host']$")

		$VMhostInstance.AddProperty("$MPElement[Name='Community.VMware.Class.Host']/HostId$", [string]$VMhost.MoRef )

		$VMhostInstance.AddProperty("$MPElement[Name='Community.VMware.Class.vCenter']/vCenterServerName$", $vCenterServerName )

		

		ForEach ($VMdatastore in $VMhost.Datastore){



			$MatchingDatastore = $VMdatastoreObjs | Where {$_.'[Community.VMware.Class.Datastore].DatastoreId'.Value -eq [string]$VMdatastore}

			If ($MatchingDatastore){



				#Datastore Obj (already discovered)

				$VMdatastoreInstance = $discoveryData.CreateClassInstance("$MPElement[Name='Community.VMware.Class.Datastore']$")

				$VMdatastoreInstance.AddProperty("$MPElement[Name='Community.VMware.Class.Datastore']/DatastoreId$", [string]$MatchingDatastore.'[Community.VMware.Class.Datastore].DatastoreId'.Value )

				$VMdatastoreInstance.AddProperty("$MPElement[Name='Community.VMware.Class.vCenter']/vCenterServerName$", $vCenterServerName )

				

				#VM references Datastore

				$rel1 = $discoveryData.CreateRelationshipInstance("$MPElement[Name='Community.VMware.Relationship.HostReferencesDatastore']$")

				$rel1.Source = $VMhostInstance

				$rel1.Target = $VMdatastoreInstance

				$discoveryData.AddInstance($rel1)

			}

		}

	}

}

Try {Disconnect-VIServer -Server $connection -Confirm:$false}

Catch {DefaultErrorLogging}

$discoveryData</Script></ScriptBody>

    <Parameters>

      <Parameter>

        <Name>sourceID</Name>

        <Value>$MPElement$</Value>

      </Parameter>

      <Parameter>

        <Name>managedEntityID</Name>

        <Value>$Target/Id$</Value>

      </Parameter>

      <Parameter>

        <Name>vCenterServerName</Name>

        <Value>$Target/Property[Type="Community.VMware.Class.vCenter"]/vCenterServerName$</Value>

      </Parameter>

    </Parameters>

    <TimeoutSeconds>300</TimeoutSeconds>

  </DataSource>

</Discovery>