How to Create a Unit Monitor
System Center
Updated: May 22, 2009
Applies To: Operations Manager 2007 R2, Operations Manager 2007 SP1, System Center Operations Manager 2007
Unit monitors are used to monitor specific counters, events, scripts, and services. Unit monitors can be rolled up to either dependency or aggregate rollup monitors. You have the option to set the monitor to generate an alert.
For an example of how to create a unit monitor to monitor an event log see, How to Create an Event Log Unit Monitor.
The following code example shows how to create a unit monitor that monitors the state of a service.
// // Creates a unit monitor. // using Microsoft.EnterpriseManagement; using Microsoft.EnterpriseManagement.Administration; using Microsoft.EnterpriseManagement.Common; using Microsoft.EnterpriseManagement.Configuration; using Microsoft.EnterpriseManagement.Monitoring; using System; using System.Collections.Generic; using System.Collections.ObjectModel; using System.Text; namespace SDKSamples { class Program { //------------------------------------------------------------------- static void Main(string[] args) { ManagementGroup mg; ManagementPack mp; MonitoringClass monitoringClass; MonitoringClassCriteria monitoringClassCriteria; ManagementPackUnitMonitor serviceMonitor; ManagementPackUnitMonitorType serviceMonitorType; mg = new ManagementGroup("localhost"); mp = mg.GetManagementPacks("SampleManagementPack")[0]; monitoringClassCriteria = new MonitoringClassCriteria( "DisplayName='Windows Server 2003 Operating System'"); monitoringClass = mg.GetMonitoringClasses(monitoringClassCriteria)[0]; serviceMonitorType = mg.GetUnitMonitorTypes( "Microsoft.Windows.CheckNTServiceStateMonitorType")[0]; serviceMonitor = new ManagementPackUnitMonitor( mp, "SampleServiceMonitor", ManagementPackAccessibility.Internal); serviceMonitor.DisplayName = "Sample Service Monitor"; serviceMonitor.TypeID = serviceMonitorType; serviceMonitor.Target = monitoringClass; ConfigureAlertSettings(serviceMonitor,serviceMonitorType,mp); ConfigureHealthStates(serviceMonitor, serviceMonitorType); SpecifyMonitorConfiguration(serviceMonitor); SpecifyParentMonitor(serviceMonitor, mg); mp.Verify(); //Save the changes into the management pack. mp.AcceptChanges(); } private static void SpecifyParentMonitor( ManagementPackUnitMonitor serviceMonitor, ManagementGroup mg ) { ManagementPackAggregateMonitor parentMonitor; MonitorCriteria monitorCriteria; monitorCriteria = new MonitorCriteria("Name='System.Health.AvailabilityState'"); parentMonitor = (ManagementPackAggregateMonitor)mg.GetMonitors(monitorCriteria)[0]; serviceMonitor.ParentMonitorID = parentMonitor; } //------------------------------------------------------------------- private static void SpecifyMonitorConfiguration( ManagementPackUnitMonitor serviceMonitor ) { string monitorConfig; monitorConfig = @"<ComputerName>$Target/Host/Property[Type=""Windows!Microsoft.Windows.Computer""]/NetworkName$</ComputerName> <ServiceName>Alerter</ServiceName>"; serviceMonitor.Configuration = monitorConfig; } //------------------------------------------------------------------- private static void ConfigureHealthStates( ManagementPackUnitMonitor serviceMonitor, ManagementPackUnitMonitorType serviceMonitorType ) { ManagementPackUnitMonitorOperationalState healthyState; ManagementPackUnitMonitorOperationalState errorState; healthyState = new ManagementPackUnitMonitorOperationalState(serviceMonitor, "Success"); errorState = new ManagementPackUnitMonitorOperationalState(serviceMonitor, "Error"); healthyState.HealthState = HealthState.Success; healthyState.MonitorTypeStateID = "Running"; errorState.HealthState = HealthState.Error; errorState.MonitorTypeStateID = "NotRunning"; serviceMonitor.OperationalStateCollection.Add(healthyState); serviceMonitor.OperationalStateCollection.Add(errorState); } //------------------------------------------------------------------- private static void ConfigureAlertSettings( ManagementPackUnitMonitor serviceMonitor, ManagementPackUnitMonitorType unitMonitorType, ManagementPack mp ) { serviceMonitor.AlertSettings = new ManagementPackMonitorAlertSettings(); serviceMonitor.AlertSettings.AlertOnState = HealthState.Error; serviceMonitor.AlertSettings.AutoResolve = true; serviceMonitor.AlertSettings.AlertPriority = ManagementPackWorkflowPriority.Normal; serviceMonitor.AlertSettings.AlertSeverity = ManagementPackAlertSeverity.Error; serviceMonitor.AlertSettings.AlertParameter1 = @"$Target/Host/Property[Type=""Windows!Microsoft.Windows.Computer""]/NetworkName$"; //this points to the computer name ManagementPackStringResource alertMessage; alertMessage = new ManagementPackStringResource(mp, "SampleAlertMessage"); alertMessage.DisplayName = "The Alerter service is stopped"; alertMessage.Description = "The Alerter service is stopped on computer {0}."; serviceMonitor.AlertSettings.AlertMessage = alertMessage; } } }
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