Microsoft.SystemCenter.VirtualMachineManager.PRO.VMPressure (UnitMonitorType)

Element properties:

Member Modules:

Overrideable Parameters:

Source Code:

<UnitMonitorType ID="Microsoft.SystemCenter.VirtualMachineManager.PRO.VMPressure" Accessibility="Internal">

  <MonitorTypeStates>

    <MonitorTypeState ID="ConditionError"/>

    <MonitorTypeState ID="ConditionWarn"/>

    <MonitorTypeState ID="ConditionSuccess"/>

  </MonitorTypeStates>

  <Configuration>

    <xsd:element name="IntervalSeconds" type="xsd:integer"/>

    <xsd:element name="VMNames" type="xsd:string"/>

    <xsd:element name="WarningThreshold" type="xsd:integer"/>

    <xsd:element name="ErrorThreshold" type="xsd:integer"/>

    <xsd:element name="ConsecutiveSamples" type="xsd:integer"/>

  </Configuration>

  <OverrideableParameters>

    <OverrideableParameter ID="IntervalSeconds" Selector="$Config/IntervalSeconds$" ParameterType="int"/>

    <OverrideableParameter ID="WarningThreshold" Selector="$Config/WarningThreshold$" ParameterType="int"/>

    <OverrideableParameter ID="ErrorThreshold" Selector="$Config/ErrorThreshold$" ParameterType="int"/>

    <OverrideableParameter ID="ConsecutiveSamples" Selector="$Config/ConsecutiveSamples$" ParameterType="int"/>

  </OverrideableParameters>

  <MonitorImplementation>

    <MemberModules>

      <DataSource ID="DS" TypeID="Microsoft.SystemCenter.VirtualMachineManager.PRO.TimedPowerShell.PerformanceProvider">

        <IntervalSeconds>$Config/IntervalSeconds$</IntervalSeconds>

        <ScriptName>PowershellVMPressureCheck</ScriptName>

        <ScriptBody><Script>

                   param($VMNames, $WarningThresholdPercent, $ErrorThresholdPercent)



$evt = New-Object System.Diagnostics.Eventlog("Application");

$evt.Source = "Microsoft.SystemCenter.VirtualMachineManager.PRO";

$infoevent = [System.Diagnostics.EventLogEntryType]::Information;



[int]$CurrentPressure = 0;

$oAPI = New-Object -comObject 'MOM.ScriptAPI'

$pBag = $oAPI.CreatePropertyBag()



[int]$state = 0;



$error.Clear()

$counters = Get-Counter "\Hyper-V Dynamic Memory VM(*)\Current Pressure"

if ($counters -ne $null -and $counters.CounterSamples -ne $null)

{

    $counterSamples = $counters.CounterSamples;

    foreach ($counter in $counterSamples)

    {

        if ($counter -ne $null -AND $counter.InstanceName -ne $null)

        {

            $CurrentPressure = $counter.CookedValue;

            $name = $counter.InstanceName

            # first check for error threshold

            if ($CurrentPressure -gt $ErrorThresholdPercent)

            {

                    $state = 2;

                    $pBag.AddValue('VM', $name);

                    $pBag.AddValue('CurrentVMPressure', $CurrentPressure); 

                    $pBag.AddValue('PercentMemoryPressureState', $state)

                    $pBag

                    break;

            }

        }

    }



    if ($state -ne 2)

    {   

        #check for warning state VMs now

        foreach ($counter in $counterSamples)

        {

            if ($counter -ne $null -AND $counter.InstanceName -ne $null)

            {

                $CurrentPressure = $counter.CookedValue;

                $name = $counter.InstanceName

                # first check for error threshold

                if ($CurrentPressure -gt $WarningThresholdPercent -AND $CurrentPressure -le $ErrorThresholdPercent)

                {

                        $state = 1;

                        $pBag.AddValue('VM', $name);

                        $pBag.AddValue('CurrentVMPressure', $CurrentPressure); 

                        $pBag.AddValue('PercentMemoryPressureState', $state)

                        $pBag

                        break;

                }

            }

        }

    }

}

else

{

    $evt.WriteEntry("Could not enumerate instances of Hyper-V Dynamic Memory counter. All VMs may be turned off.  " + $error, $infoevent, 100);

}



if ($state -eq 0)

{

    # send a property bag with dummy values to indicate everything's fine

    $pBag.AddValue('VM', ' ');

    $pBag.AddValue('CurrentVMPressure', 0); 

    $pBag.AddValue('PercentMemoryPressureState', $state)

    $pBag

}



                  </Script></ScriptBody>

        <Parameters>

          <Parameter>

            <Name>VMNames</Name>

            <Value>$Config/VMNames$</Value>

          </Parameter>

          <Parameter>

            <Name>WarningThreshold</Name>

            <Value>$Config/WarningThreshold$</Value>

          </Parameter>

          <Parameter>

            <Name>ErrorThreshold</Name>

            <Value>$Config/ErrorThreshold$</Value>

          </Parameter>

        </Parameters>

        <TimeoutSeconds>300</TimeoutSeconds>

        <ObjectName>DynamicMemory</ObjectName>

        <CounterName>CurrentPressure</CounterName>

        <InstanceName>$Data/Property[@Name='VM']$</InstanceName>

        <Value>$Data/Property[@Name='CurrentVMPressure']$</Value>

      </DataSource>

      <ConditionDetection TypeID="Performance!System.Performance.ConsecutiveSamplesCondition" ID="CD1">

        <Threshold>$Config/ErrorThreshold$</Threshold>

        <Direction>greater</Direction>

      </ConditionDetection>

      <ConditionDetection TypeID="Performance!System.Performance.ConsecutiveSamplesCondition" ID="CD2">

        <Threshold>$Config/WarningThreshold$</Threshold>

        <Direction>greater</Direction>

      </ConditionDetection>

      <ConditionDetection TypeID="System!System.ExpressionFilter" ID="CDSufficientSamples">

        <Expression>

          <SimpleExpression>

            <ValueExpression>

              <XPathQuery Type="Double">Value</XPathQuery>

            </ValueExpression>

            <Operator>GreaterEqual</Operator>

            <ValueExpression>

              <Value Type="Double">$Config/ConsecutiveSamples$</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

      </ConditionDetection>

      <ConditionDetection TypeID="System!System.ExpressionFilter" ID="CDInSufficientSamples">

        <Expression>

          <SimpleExpression>

            <ValueExpression>

              <XPathQuery Type="Double">Value</XPathQuery>

            </ValueExpression>

            <Operator>Less</Operator>

            <ValueExpression>

              <Value Type="Double">$Config/ConsecutiveSamples$</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

      </ConditionDetection>

    </MemberModules>

    <RegularDetections>

      <RegularDetection MonitorTypeStateID="ConditionError">

        <Node ID="CDSufficientSamples">

          <Node ID="CD1">

            <Node ID="DS"/>

          </Node>

        </Node>

      </RegularDetection>

      <RegularDetection MonitorTypeStateID="ConditionWarn">

        <Node ID="CDSufficientSamples">

          <Node ID="CD2">

            <Node ID="DS"/>

          </Node>

        </Node>

      </RegularDetection>

      <RegularDetection MonitorTypeStateID="ConditionSuccess">

        <Node ID="CDInSufficientSamples">

          <Node ID="DS"/>

        </Node>

      </RegularDetection>

    </RegularDetections>

  </MonitorImplementation>

</UnitMonitorType>