Applying Changes to Cluster Members

For information about monitoring the health or statistics of a cluster, see Section 4.8.3, “Viewing the Health of an Access Gateway Cluster,” on page 162 and Section 4.5, “Viewing Cluster Statistics,”

on page 150.

6.4.1 Creating a New Cluster

1 In the Administration Console, click Access Manager > New Cluster.

2 Fill in the following fields:

Cluster Name: Specify a display name for the cluster.

Type: Select the type of cluster you want to create: Gateway Appliance or Gateway Service.

Primary Cluster Server: Select the server that is to be the primary server in the cluster. This field is empty until you have selected one or more servers to be members of the cluster.

3 In the Server Name list, select the servers that you want to be members of the cluster.

You can create a cluster of one, and add additional servers later.You cannot create a cluster that contains Access Gateway Appliances and Access Gateway Services. The cluster can contain only one type of Access Gateway.

Each server you add to the cluster adds about 30 seconds to the time it takes to configure the cluster because certificates must be synchronized and configuration options must be sent to that server. If you create a very large cluster of twenty servers, it can take up to ten minutes to configure and create the cluster.

4 Select the server you want to be the Primary Cluster Server.

5 Click OK.

6 After the cluster has been created, each server in the cluster needs be restarted. On the Access Gateways page, click Update All by the name of the cluster.

7 For information on additional required configuration tasks, see “Clustering Access Gateways”

in the Novell Access Manager 3.1 SP2 Setup Guide.

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6.4.2 Managing the Servers in the Cluster

To view the servers that are currently members of clusters:

1 In the Administration Console, click Devices > Access Gateways.

The members of a cluster are listed under the cluster name. The red double dagger symbol identifies the server that is the primary cluster server.

2 To add a server to a cluster, select the server, then click Actions > Assign to Cluster > [Name of Cluster].

A cluster cannot contain both Access Gateway Appliances and Access Gateway Services. The cluster can contain only one type of Access Gateway.

3 To remove a server from a cluster, select the server, then click Actions > Remove from Cluster.

Usually when you delete a server from a cluster, you have discovered that traffic is lighter than anticipated and that it can be handled with fewer machines while another cluster is

experiencing higher traffic and can benefit from having another cluster member. When the server is removed, its configuration object maintains all the configuration settings from the cluster. When it is added to a new cluster, its configuration object is updated with the

configuration settings of the new cluster. If your clusters are behind an L4 switch, you need to reconfigure the switch so that the server is assigned to the correct cluster.

When a server is removed from a cluster, its Embedded Service Provider is stopped. If you are not going to assign it to another cluster, you need to reconfigure the server so that it is

protecting resources other than the ones it protected in the cluster. When you apply the changes by clicking Update, the Embedded Service Provider is restarted.

You cannot remove the primary cluster server unless it is the only server in the cluster. If you need to remove the primary cluster server from a multiple server cluster, you need to assign another the server to be the primary cluster server.

4 To modify which server is the primary cluster server, see Section 6.4.5, “Changing the Primary Cluster Server,” on page 201.

5 To view detailed information about a server in the group, click the name of the server.

6 To view detailed health information about a server, click the health icon of the server. For more information, see Section 4.8.2, “Monitoring the Health of an Access Gateway,” on page 158.

7 Click Close.

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6.4.3 Managing Cluster Details

Use the Cluster Details page to perform general maintenance actions on the selected cluster and to display server information about the selected cluster.

1 In the Administration Console, click Devices > Access Gateways > [Cluster Name].

2 View the following fields:

Name: Specifies the name of the cluster.

Description: Specifies the purpose of the cluster. This is optional, but useful if your network has multiple Access Gateway clusters. If the field is empty, click Edit to add a description.

Primary Server: Indicates which server in the cluster has been assigned to be the primary server.

3 To modify the information, click Edit. For more information, see Section 6.4.4, “Editing Cluster Details,” on page 200.

4 To select a different Access Gateway to be the primary cluster member, click Edit.

5 To modify details about a cluster member, click the server name in the Cluster member list.

6 Click Close.

6.4.4 Editing Cluster Details

Use the Cluster Detail Edit to change the name of the cluster and assign a different server to be the primary cluster member.

1 In the Administration Console, click Devices > Access Gateways > [Cluster Name] > Edit.

2 Modify the following fields:

Name: Specify a name for the cluster.

Description: Specify the purpose of the cluster. This is optional, but useful if your network has multiple Access Gateway clusters.

Primary Server: Indicates which server in the cluster has been assigned to be the primary server. To change this assignment, select the server from the drop-down list. For more information on this process, see Section 6.4.5, “Changing the Primary Cluster Server,” on page 201.

3 Click OK.