Adding nodes to a cluster


Adding nodes to a cluster
Prev	Deploying Replicated Data Clusters: New application installation	Next

If you are setting up a Replicated Data Cluster, use the VCS Cluster Configuration Wizard (VCW) to add the systems in the secondary zone (zone1) to the existing cluster.

You use the VCS Cluster Configuration Wizard (VCW) to add one or more nodes to an existing cluster.

Prerequisites for adding a node to an existing cluster are as follows:

Verify that the logged-on user has VCS cluster administrator privileges.
The logged-on user must be a local administrator on the system where you run the wizard.
Verify that Command Server is running on all nodes in the cluster. Select Services on the Administrative Tools menu and verify that the Veritas Command Server shows that it is started.
Verify that the high availability daemon (HAD) is running on the node on which you run the wizard. Open the Services window, and verify that the Veritas High availability engine service is running.

To add a node to a VCS cluster

Start the VCS Cluster Configuration wizard.
Click Start > All Programs > Veritas > Veritas Cluster Server > Configuration Tools > Cluster Configuration Wizard.

Run the wizard from the node to be added or from a node in the cluster. The node that is being added should be part of the domain to which the cluster belongs.
Read the information on the Welcome panel and click Next.
On the Configuration Options panel, click Cluster Operations and click Next.
In the Domain Selection panel, select or type the name of the domain in which the cluster resides and select the discovery options.
To discover information about all the systems and users in the domain, do the following:
- Clear the Specify systems and users manually check box.
- Click Next.
  
  Proceed to step 8.
To specify systems and user names manually (recommended for large domains), do the following:
- Check the Specify systems and users manually check box.
  
  Additionally, you may instruct the wizard to retrieve a list of systems and users in the domain by selecting appropriate check boxes.
- Click Next.
  
  If you chose to retrieve the list of systems, proceed to step 6. Otherwise proceed to the next step.
On the System Selection panel, complete the following and click Next:
- Type the name of an existing node in the cluster and click Add.
- Type the name of the system to be added to the cluster and click Add.
If you specify only one node of an existing cluster, the wizard discovers all nodes for that cluster. To add a node to an existing cluster, you must specify a minimum of two nodes; one that is already a part of a cluster and the other that is to be added to the cluster.

Proceed to step 8.
On the System Selection panel, specify the systems to be added and the nodes for the cluster to which you are adding the systems.
Enter the system name and click Add to add the system to the Selected Systems list. Alternatively, you can select the systems from the Domain Systems list and click the right-arrow icon.

If you specify only one node of an existing cluster, the wizard discovers all nodes for that cluster. To add a node to an existing cluster, you must specify a minimum of two nodes; one that is already a part of a cluster and the other that is to be added to the cluster.
The System Report panel displays the validation status, whether Accepted or Rejected, of all the systems you specified earlier.
A system can be rejected for any of the following reasons:
- The system does not respond to a ping request.
- WMI access is disabled on the system.
- The wizard is unable to retrieve information about the system's architecture or operating system.
- VCS is either not installed on the system or the version of VCS is different from what is installed on the system on which you are running the wizard.
Click on a system name to see the validation details. If you wish to include a rejected system, rectify the error based on the reason for rejection and then run the wizard again.

Click Next to proceed.
On the Cluster Configuration Options panel, click Edit Existing Cluster and click Next.
On the Cluster Selection panel, select the cluster to be edited and click Next.
If you chose to specify the systems manually in step 4, only the clusters configured with the specified systems are displayed.
On the Edit Cluster Options panel, click Add Nodes and click Next.
In the Cluster User Information dialog box, type the user name and password for a user with administrative privileges to the cluster and click OK.

The Cluster User Information dialog box appears only when you add a node to a cluster with VCS user privileges (a cluster that is not a secure cluster).
On the Cluster Details panel, check the check boxes next to the systems to be added to the cluster and click Next.
The right pane lists nodes that are part of the cluster. The left pane lists systems that can be added to the cluster.
The wizard validates the selected systems for cluster membership. After the nodes have been validated, click Next.
If a node does not get validated, review the message associated with the failure and restart the wizard after rectifying the problem.
On the Private Network Configuration panel, configure the VCS private network communication on each system being added and then click Next. How you configure the VCS private network communication depends on how it is configured in the cluster. If LLT is configured over Ethernet, you have to use the same on the nodes being added. Similarly, if LLT is configured over UDP in the cluster, you have use the same on the nodes being added.
Do one of the following:
- To configure the VCS private network over Ethernet, do the following:
  - Select the check boxes next to the two NICs to be assigned to the private network.
    
    Veritas recommends reserving two NICs exclusively for the private network. However, you could lower the priority of one NIC and use the low-priority NIC for public and private communication.
  - If you have only two NICs on a selected system, it is recommended that you lower the priority of at least one NIC that will be used for private as well as public network communication.
    
    To lower the priority of a NIC, right-click the NIC and select Low Priority from the pop-up menu.
  - If your configuration contains teamed NICs, the wizard groups them as "NIC Group #N" where "N" is a number assigned to the teamed NIC. A teamed NIC is a logical NIC, formed by grouping several physical NICs together. All NICs in a team have an identical MAC address. Veritas recommends that you do not select teamed NICs for the private network.
  The wizard configures the LLT service (over Ethernet) on the selected network adapters.
- To configure the VCS private network over the User Datagram Protocol (UDP) layer, do the following:
  - Select the check boxes next to the two NICs to be assigned to the private network. You can assign maximum eight network links. Veritas recommends reserving at least two NICs exclusively for the VCS private network. You could lower the priority of one NIC and use the low-priority NIC for both public and private communication.
  - If you have only two NICs on a selected system, it is recommended that you lower the priority of at least one NIC that will be used for private as well as public network communication. To lower the priority of a NIC, right-click the NIC and select Low Priority from the pop-up menu.
  - Specify a unique UDP port for each of the link. Click Edit Ports if you wish to edit the UDP ports for the links. You can use ports in the range 49152 to 65535. The default ports numbers are 50000 and 50001 respectively. Click OK.
  - For each selected NIC, verify the displayed IP address. If a selected NIC has multiple IP addresses assigned, double-click the field and choose the desired IP address from the drop-down list. In case of IPv4, each IP address can be in a different subnet.
    
    The IP address is used for the VCS private communication over the specified UDP port.
  - For each selected NIC, double-click the respective field in the Link column and choose a link from the drop-down list. Specify a different link (Link1 or Link2) for each NIC. Each link is associated with a UDP port that you specified earlier.
  The wizard configures the LLT service (over UDP) on the selected network adapters. The specified UDP ports are used for the private network communication.
On the Public Network Communication panel, select a NIC for public network communication, for each system that is being added, and then click Next.
This step is applicable only if you have configured the ClusterService service group, and the system being added has multiple adapters. If the system has only one adapter for public network communication, the wizard configures that adapter automatically.
Specify the credentials for the user in whose context the VCS Helper service runs.
Review the summary information and click Add.
The wizard starts running commands to add the node. After all commands have been successfully run, click Finish.

If you are setting up a Replicated Data Cluster, return to the task list:

See Creating a parallel environment in the secondary zone.

Prev	Up	Next
Creating a parallel environment in the secondary zone	Home	Creating the Replicated Data Sets with the wizard