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Veeam VMware: Virtual SAN Health Alarm 'Invalid preferred fault domain on witness host'

Veeam.Virt.Extensions.VMware.VSAN.VMCCR.VirtualSANHealthAlarmInvalidpreferredfaultdomainonwitnesshost (UnitMonitor)

Knowledge Base article:

Summary

This monitor tracks the Virtual SAN Health Alarm 'Witness host with invalid preferred fault domain'.

Causes

In a vSAN stretched cluster, fault domains are required to avoid split-brain situations with cross-site communication issues, and thus to allow virtual machines to remain accessible. The purpose of the Witness host with invalid preferred fault domain check is to ensure that the preferred fault domain configured for the witness host is valid. If the check fails, this means that the fault domain is invalid or not present.

For more information on the Stretched Cluster Health - Witness host with invalid preferred fault domain check, see the VMware Virtual SAN Health Check Plugin Guide.

Resolutions

Try performing total reconfiguration of the cluster and selecting the preferred default domain in process.

Try fixing the failure which caused the fault domain to be invalid.

Try setting the preferred fault domain. To do that, run the 'esxcli vsan cluster preferredfaultdomain' command on the witness host.

For more information on troubleshooting Virtual SAN issues, see VMware Docs.

Use the Alerts View to see all current open issues for this object. Use the Events View to review any error and warning events for this object. Open a Performance View to see the performance metrics for this object and all contained objects. Open a Diagram View to analyze the relationships of this object to other components.

External

See the Help Center for more information including reference lists of all Rules and Monitors and full set of User Guides for the Veeam MP for VMware.

See the VMware Online Documentation for more information on VMware vSphere, in particular:

Element properties:

TargetVeeam.Virt.Extensions.VMware.VMCCR
Parent MonitorSystem.Health.ConfigurationState
CategoryAvailabilityHealth
EnabledTrue
Alert GenerateTrue
Alert SeverityMatchMonitorHealth
Alert PriorityHigh
Alert Auto ResolveTrue
Monitor TypeMicrosoft.Windows.3SingleEventLog3StateUnitMonitorType
RemotableTrue
AccessibilityPublic
Alert Message
Veeam VMware: Virtual SAN Health Alarm 'Invalid preferred fault domain on witness host'
{0}
RunAsDefault

Source Code:

<UnitMonitor ID="Veeam.Virt.Extensions.VMware.VSAN.VMCCR.VirtualSANHealthAlarmInvalidpreferredfaultdomainonwitnesshost" Accessibility="Public" Enabled="onEssentialMonitoring" Target="VeeamVEVMwareLib!Veeam.Virt.Extensions.VMware.VMCCR" ParentMonitorID="SystemHealth!System.Health.ConfigurationState" Remotable="true" Priority="Normal" TypeID="Windows!Microsoft.Windows.3SingleEventLog3StateUnitMonitorType" ConfirmDelivery="true">

  <Category>AvailabilityHealth</Category>

  <AlertSettings AlertMessage="Veeam.Virt.Extensions.VMware.VSAN.VMCCR.VirtualSANHealthAlarmInvalidpreferredfaultdomainonwitnesshost_AlertMessageResourceID">

    <AlertOnState>Warning</AlertOnState>

    <AutoResolve>true</AutoResolve>

    <AlertPriority>High</AlertPriority>

    <AlertSeverity>MatchMonitorHealth</AlertSeverity>

    <AlertParameters>

      <AlertParameter1>$Data/Context/Params/Param[11]$</AlertParameter1>

    </AlertParameters>

  </AlertSettings>

  <OperationalStates>

    <OperationalState ID="FirstEventRaised" MonitorTypeStateID="FirstEventRaised" HealthState="Error"/>

    <OperationalState ID="SecondEventRaised" MonitorTypeStateID="SecondEventRaised" HealthState="Warning"/>

    <OperationalState ID="ThirdEventRaised" MonitorTypeStateID="ThirdEventRaised" HealthState="Success"/>

  </OperationalStates>

  <Configuration>

    <FirstComputerName>.</FirstComputerName>

    <FirstLogName>Veeam VMware</FirstLogName>

    <FirstExpression>

      <And>

        <Expression>

          <SimpleExpression>

            <ValueExpression>

              <XPathQuery Type="String">Params/Param[1]</XPathQuery>

            </ValueExpression>

            <Operator>Equal</Operator>

            <ValueExpression>

              <Value Type="String">AlarmStatusChangedEvent</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

        <Expression>

          <RegExExpression>

            <ValueExpression>

              <XPathQuery Type="String">Params/Param[11]</XPathQuery>

            </ValueExpression>

            <Operator>MatchesWildcard</Operator>

            <Pattern>Alarm*SAN Health Alarm *Invalid preferred fault domain on witness host*to red*</Pattern>

          </RegExExpression>

        </Expression>

        <Expression>

          <SimpleExpression>

            <ValueExpression>

              <XPathQuery Type="String">Params/Param[3]</XPathQuery>

            </ValueExpression>

            <Operator>Equal</Operator>

            <ValueExpression>

              <Value Type="String">$Target/Property[Type="System!System.Entity"]/DisplayName$</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

      </And>

    </FirstExpression>

    <SecondComputerName>.</SecondComputerName>

    <SecondLogName>Veeam VMware</SecondLogName>

    <SecondExpression>

      <And>

        <Expression>

          <SimpleExpression>

            <ValueExpression>

              <XPathQuery Type="String">Params/Param[1]</XPathQuery>

            </ValueExpression>

            <Operator>Equal</Operator>

            <ValueExpression>

              <Value Type="String">AlarmStatusChangedEvent</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

        <Expression>

          <RegExExpression>

            <ValueExpression>

              <XPathQuery Type="String">Params/Param[11]</XPathQuery>

            </ValueExpression>

            <Operator>MatchesWildcard</Operator>

            <Pattern>Alarm*SAN Health Alarm *Invalid preferred fault domain on witness host*to yellow*</Pattern>

          </RegExExpression>

        </Expression>

        <Expression>

          <SimpleExpression>

            <ValueExpression>

              <XPathQuery Type="String">Params/Param[3]</XPathQuery>

            </ValueExpression>

            <Operator>Equal</Operator>

            <ValueExpression>

              <Value Type="String">$Target/Property[Type="System!System.Entity"]/DisplayName$</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

      </And>

    </SecondExpression>

    <ThirdComputerName>.</ThirdComputerName>

    <ThirdLogName>Veeam VMware</ThirdLogName>

    <ThirdExpression>

      <And>

        <Expression>

          <SimpleExpression>

            <ValueExpression>

              <XPathQuery Type="String">Params/Param[1]</XPathQuery>

            </ValueExpression>

            <Operator>Equal</Operator>

            <ValueExpression>

              <Value Type="String">AlarmStatusChangedEvent</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

        <Expression>

          <RegExExpression>

            <ValueExpression>

              <XPathQuery Type="String">Params/Param[11]</XPathQuery>

            </ValueExpression>

            <Operator>MatchesWildcard</Operator>

            <Pattern>Alarm*SAN Health Alarm *Invalid preferred fault domain on witness host*to green*</Pattern>

          </RegExExpression>

        </Expression>

        <Expression>

          <SimpleExpression>

            <ValueExpression>

              <XPathQuery Type="String">Params/Param[3]</XPathQuery>

            </ValueExpression>

            <Operator>Equal</Operator>

            <ValueExpression>

              <Value Type="String">$Target/Property[Type="System!System.Entity"]/DisplayName$</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

      </And>

    </ThirdExpression>

  </Configuration>

</UnitMonitor>