SCOM - Create new network discovery rule via PowerShell

I recently had to setup a lot of SCOM management groups with the same network discovery rule. I soon found out there isn't a powershell cmdlet for it. Of course, it's the kind of thing you don't really need that often, as only one discovery rule is allowed per management server. Anyway, I needed one, so I wrote one, and I hope this saves someone some time in the future.
# # Name: Udated OM-Create-Network-Discovery-Rule.ps1 # Written by: Rafaela Brownlie # Date: 20/06/17 # Description: The script programatically builds SNMP run as account, and builds a discovery rule to discover the UPS # $OMFQDN stores the FQDN for the SCOM server # $HostIP = Network device ip address # I wrote it for SCOM 2012 R2. I haven't tested on SCOM 2016, but I believe it should work. # the functionality requires the the Operations Manager firewal rules for ping back and snmp enabled. $OMFQDN = "" $hostIP = "" `` Write-Host "enbling firewall rules for $OMFQDN" -ForegroundColor Magenta $Netrules = @('Operations Manager SNMP Response','Operations Manager SNMP Request', 'Operations Manager SNMP Trap Listener', 'Operations Manager Ping Response (Echo Response - ICMPv4 IN)') invoke-command -ComputerName $OMFQDN -Args $Netrules -ScriptBlock { param($rule1, $rule2,$rule3,$rule4) $rule1, $rule2,$rule3,$rule4 | %{get-netfirewallrule -DisplayName $_ | set-netfirewallrule -enabled true} } #enable scom firewall rules Get-SCOMManagementGroupConnection | Remove-SCOMManagementGroupConnection Write-Host "Connecting to SCOM MG $OMFQDN" -ForegroundColor Magenta New-SCOMManagementGroupConnection -ComputerName $OMFQDN Get-SCOMManagementGroupConnection $mg = Get-SCOMManagementGroup -ComputerName $OMFQDN $resourcepool = get-scomresourcepool -DisplayName "All Management Servers*" $discovery = $mg.NetworkDiscovery.GetNetworkDiscoveries() if ($discovery -ne $null){ Write-Host "there is one network discovery for this MS" -BackgroundColor Magenta break } $Account = Get-SCOMrunAsAccount -Name "SNMPv1 Account" `` If($Account -eq $null) { Write-Host "Creating account" -ForegroundColor Magenta # $a = Get-Credential -Message "Enter community string in password field" Write-Host "Creating account" -ForegroundColor Magenta Add-SCOMRunAsAccount -Name "UPS SNMPv1" -Descrption "Account used for Eaton UPS monitoring" -CommunityString -String $a.Password $Account = Get-SCOMrunAsAccount -Name "UPS SNMPv1" Write-Host "distributing account" -ForegroundColor Magenta Set-SCOMRunAsDistribution -RunAsAccount $Account -LessSecure `` Write-Host "Waitin for account to be created" -backgroundColor Magenta sleep -Seconds 60 } $Profile = Get-SCOMRunAsProfile -DisplayName "SNMP Monitoring Account" Set-SCOMRunAsProfile -Action "Add" -Profile $Profile -Account $Account $ms = (Get-SCOMManagementServer) #set account distribution to more secure. Write-Host "creating configuration object" -ForegroundColor Magenta $networkconfiguration = New-Object Microsoft.EnterpriseManagement.NetworkMonitoring.NetworkDiscoveryConfiguration $networkconfiguration.DefaultRetryCount = 3 $networkconfiguration.DefaultSnmpPort = 161 $networkconfiguration.SnmpDefaultAutoTimeoutMilliseconds = 1500 $networkconfiguration.IcmpDefaultAutoTimeoutMilliseconds = 500 $networkconfigurationtype = New-Object Microsoft.EnterpriseManagement.NetworkMonitoring.NetworkDiscoveryType $networkconfigurationtype.value__ = 0 $networkconfiguration.Type = $networkconfigurationtype Write-Host "creating SNMP host object" -ForegroundColor Magenta $SNMPCommunity =[Microsoft.EnterpriseManagement.NetworkMonitoring.Snmpv1Community]::create($mg, $account $snmpHost = New-Object Microsoft.EnterpriseManagement.NetworkMonitoring.SnmpHost #my snmp host IP addresses. $snmpHost.Host = $hostIP $snmpHost.Community = $SNMPCommunity #you could add more than one host here: $networkconfiguration.Seeds.add($snmphost) $networkconfiguration.Communities.add($SNMPCommunity) Write-Host "creating discovery object" -ForegroundColor Magenta $networkdiscovery = new-object Microsoft.EnterpriseManagement.NetworkMonitoring.NetworkDiscovery #Name of the discovery rule: $networkdiscovery.DisplayName = "NetoworkDiscovery" $networkdiscovery.Enabled = $true $networkdiscovery.MonitoringServerPool = $resourcepool $networkdiscovery.Configuration = $networkconfiguration $networkdiscovery.NetworkDiscoveryAgent = Get-SCOMClassInstance -Class (Get-SCOMclass -DisplayName "health service") | where displayname -eq $OMFQDN Write-Host "creating Disccovery rule" -ForegroundColor Magenta $mg.NetworkDiscovery.InsertNetworkDiscovery($networkdiscovery) #allow some time for discovery creation sleep -Seconds 40 #Run the discovery once it's created: Start-SCOMTask -Task (get-scomtask -name System.NetworkManagement.FullOnDemandDiscovery) -Instance (Get-SCOMMonitoringObject -Class (Get-SCOMClass -DisplayName "Network Discovery Server"))

Comments

• Anonymous
  July 28, 2017
  Have you tried using the $mg.networkdiscovery.updatenetworkdiscovery for updating a already existing network discovery?
  • Anonymous
    August 07, 2017
    Yes.. I'll post a new blog soon on it.