Adding nodes to the cluster

After a cluster is created, you can expand it by adding nodes to it. You add only one node at a time.

Before you begin

If you are adding nodes to a multiple-node cluster, more than half of the existing nodes in the cluster must be healthy (indicated by cluster show).
If you are adding nodes to a two-node switchless cluster, you must have installed and configured the cluster management and interconnect switches before adding additional nodes.
The switchless cluster functionality is supported only in a two-node cluster.
When a cluster contains or grows to more than two nodes, cluster HA is not required and is disabled automatically.
If you are adding a second node to a single-node cluster, the second node must have been installed, and the cluster network must have been configured.
Note
Lenovo does not support single-node clusters.
If the cluster has the SP automatic configuration enabled, the subnet specified for the SP to use must have available resources for the joining node.
A node that joins the cluster uses the specified subnet to perform automatic configuration for the SP.
You must have gathered the following information for the new node's node management LIF:
- Port
- IP address
- Netmask
- Default gateway

About this task

Nodes must be in even numbers so that they can form HA pairs. After you start to add a node to the cluster, you must complete the process. The node must be part of the cluster before you can start to add another node.

Power on the node that you want to add to the cluster.

Result

The node boots, and the Cluster Setup wizard starts on the console.

Welcome to the cluster setup wizard.

You can enter the following commands at any time:
  "help" or "?" - if you want to have a question clarified,
  "back" - if you want to change previously answered questions, and
  "exit" or "quit" - if you want to quit the cluster setup wizard.
     Any changes you made before quitting will be saved.

You can return to cluster setup at any time by typing "cluster setup".
To accept a default or omit a question, do not enter a value.

By default, AutoSupport transmission is disabled.
In order for this system to send event messages and periodic reports to Lenovo
Technical Support, Autosupport data transmission needs to be enabled.
To enable this feature, either enter "yes" to the following AutoSupport
question, or enter the CLI command "autosupport modify -support enable"
after cluster creation from the CLI. Please review the Lenovo Privacy
statement at www.lenovo.com/privacy before enabling this feature.

Enabling AutoSupport can significantly speed problem determination
and resolution, should a problem occur on your system.

To enable AutoSupport data transmission, type “yes”.
Leave this field blank to keep data transmission disabled {yes, no} [no]:

To continue with the cluster setup wizard, type "yes" {yes}:

Complete initial tasks to proceed with cluster setup wizard:
- Acknowledge the AutoSupport message. Refer to Commands for managing AutoSupport.
- Leave e0M as the node management interface port by hitting enter
- Enter network information to setup the node management interface on port e0M
Result
The Node Setup wizard exits, and a login prompt appears, warning that you have not completed the setup tasks.
Hit enter to enter cluster setup using the command line.

When prompted to create a new cluster or join an existing one, enter join.

Example

Do you want to create a new cluster or join an existing cluster? {create, join}:
join

Follow the prompts to set up the node and join it to the cluster:
- To accept the default value for a prompt, press Enter.
- To enter your own value for a prompt, enter the value, and then press Enter.
Repeat the preceding steps for each additional node that you want to add.

After you finish

After adding nodes to the cluster, you should enable storage failover for each HA pair.

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