Create Cluster Wizard - Configure Nodes

Use this page to configure optional properties for the nodes that you selected to include in the new cluster.

A minimum of two nodes are required for the new cluster. Click Back to change your node selections.

Fields

Node name
This field specifies the fully qualified host name of the node, which is the default value. You can manually specify a different name for the node. The name must be unique within the cluster and must consist of a minimum of one alphanumeric character and a maximum of 64 alphanumeric characters. You can use alphabetic characters of A - Z and a - z, numbers of 0 - 9, as well as underscore (_) characters. A name cannot begin with a number and cannot be a PowerHA™ reserved word.
Communication path
This field specifies the path that is used to establish communication with the node. PowerHA SystemMirror can use this communication path to automatically discover the cluster configuration from a single node. If you do not specify a path, the IP address of the host name for the node is used. Select a path to use from the list of discovered and available communication paths. Or, you can specify the path manually in one of the following formats:
  • a resolvable IP label/address (which can be the host name), for example, NodeA
  • IP address, for example, 10.11.122.133
  • fully qualified domain name, for example, NodeA.mycompany.com
Persistent IP label/address
This field specifies an optional IP label or IP address that you want to keep bound (persistent) to this node. There is no default value. To specify a persistent IP label/address for this node, click the arrow to select from a list of discovered and available labels/addresses that exist in the /etc/hosts file. You can manually specify an IP address only. The value that you specify must be unique within the cluster and capable of being supported by a network on the associated node.
Netmask (IPv4) / Prefix length (IPv6)
This field specifies either an optional netmask for an Internet Protocol version 4 (IPv4) address or an optional prefix length for an Internet Protocol version 6 (IPv6) address. A default value is provided based on the value specified for the Persistent IP label/address.

For an IPv4 label or address, you can specify a netmask in the range of 1 - 32, or in the format n.n.n.n, where n is a valid IP address value between 0 - 255 (for example, 0.0.0.255). You must specify a netmask for an IPv4 address when the underlying network is IPv6. A specified netmask is ignored when the persistent IP label/address and the underlying network are both IPv4.

For an IPv6 label or address, you can specify a prefix length in the range of 1 - 128. You must specify a prefix length for an IPv6 address when the underlying network is IPv4. A specified prefix length is ignored when the persistent IP label/address and the underlying network are both IPv6.

Controlling node
This selection specifies the controlling node, which is the primary owner of your highly available application server for the new cluster. The controlling node is the interface between IBM® Director and the cluster and is the node upon which all IBM Director actions are performed. If for any reason the controlling node is unable to be contacted, PowerHA SystemMirror reassigns the controlling node to a node that it can contact successfully.

The first node in the list is selected as the controlling node by default. Select this option for the node that you want to specify as the controlling node for the new cluster.