HP Operations Manager

Discover managed nodes


HP Operations Manager for Windows automatically discovers Windows and UNIX nodes in your enterprise environment and displays their names in a list of discovered domains in the Configure Managed Nodes dialog box. Click the + sign beside any domain name in the DNS folder to expand the list and see the nodes it contains.

Discovery is dynamic, so that when a domain is discovered, new nodes are automatically included in the Discovered Nodes list. When you first expand the domain, the new nodes appear in the list. The list is updated each time the Node Configuration editor is reopened. An asterisk (*) indicates required information.

To quickly locate a specific node in long lists, expand the domain (for example, DNS) in the console tree and type the name of the node you want to find. As you type, the system locates the node for you. This method works within the Configure Managed Nodes dialog box also. In either the left or right pane, expand the node list and begin typing the name of the node you want to find. It will appear selected in the list of nodes.

To configure DNS discovery

  1. Select the Nodes folder in the console tree.
  2. Click to open the Configure Managed Nodes dialog box. Discovered nodes display in the Discovered Nodes list.
  3. To add a new domain, select the DNS folder in the Discovered Nodes list and right-click to open the shortcut menu.
  4. Select New Domain to open the DNS Domain Properties dialog box.
  5. In the Domain Name box, enter the name of the domain as you want it to appear in the Discovered Nodes list.
  6. In the Domain Server box, enter the DNS server name for the domain you are adding.
  7. Click OK to confirm your changes and close this dialog box.
Note NOTE:
In a DNS/ADS environment, it is possible for the Windows domain controller to register a few A records (phantom nodes) in the DNS server, which may cause phantom nodes to appear in the Configure Nodes dialog box. These are aliases; it is not recommended that you bring these under management. To manage an ADS environment, you should use ADS discovery, where these aliases will not be visible. For more detail, see the ADS discovery example.

To edit an existing domain

  1. In the Discovered Nodes List, select the name of the domain you want to edit.
  2. Right-click to open the shortcut menu.
  3. Select Properties to open the DNS Domain Properties dialog box.
  4. Edit the displayed information.
  5. Click OK to save your changes and close this dialog box.

Troubleshooting

To set up HPOM to select discovered DNS nodes through the Configure Managed Nodes editor, you configure the DNS domains you want to view along with the appropriate DNS server for each domain.

If, after adding a new DNS domain, you are having trouble expanding your view of the domain in the interface, follow these steps to make sure your configuration is correct:

  1. Verify that you have specified the correct DNS server.
  2. Verify that the DNS server is set to Allow Zone Transfers. If you receive "Discovery failed" errors, the DNS server may not be configured to Allow Zone Transfers.
  3. Run the tool nslookup as follows to verify that you can see the nodes: 
    c:\>nslookup
>server 
>ls
  4. If you are unable to see the nodes through nslookup (that is, you receive "Query Refused" or "Non-existent domain"), then verify your basic DNS configuration or Active Directory configuration by following the procedures in your Windows Server documentation. The Microsoft Windows documentation provides examples of configurations that could affect your ability to view new nodes.

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