•Extended Configuration to configure your cluster.
•System Management (C-SPOC). C-SPOC (Cluster Single Point of Control) is an HACMP function that lets you run HACMP cluster-wide configuration commands from one node in the cluster. In HACMP for Linux, you can use System Management (C-SPOC) to start and stop the cluster services and to move, bring online and bring offline resource groups.
•Problem Determination Tools. You can customize cluster verification, view current cluster state, view logs, recover from a cluster event failure, configure error notification methods and perform other troubleshooting tasks.
•HACMP Documentation. This is the top-level tab that contains a page with links to all online and printable versions of HACMP documentation, including this guide.
Here is the top-level HACMP for Linux WebSMIT menu:
Tasks for Configuring a Basic Cluster
You configure an HACMP for Linux cluster using the Extended Configuration path in WebSMIT.
Note:In general, the sections in this guide provide a high-level overview of user interface options. See the HACMP for AIX Administration Guide for detailed procedures, field help, and recommendations for configuring each and every HACMP component.
To configure a basic cluster:
1.On one cluster node, configure a cluster name and add cluster nodes. See:
•Defining a Cluster Name
•Adding Nodes and Establishing Communication Paths
2.On each cluster node, configure all supporting networks and interfaces: serial networks for heartbeating and IP-based cluster networks for cluster communication.
Also, configure communication devices (that you must have previously defined to the operating system) to HACMP. Configure boot network interfaces (that you must have previously defined to the operating system) to HACMP. Also, configure persistent IP labels for cluster administration purposes. See:
•Configuring Serial Networks for Heartbeating
•Adding IP-Based Networks
•Configuring Communication Interfaces/Devices to HACMP
•Adding Persistent IP Labels for Cluster Administration Purposes
3.On one cluster node, configure cluster resources that will be associated with the application: service IP labels, application servers and application monitors. See:
•Configuring Resources to Make Highly Available
•Configuring Service IP Labels
•Configuring Application Servers
•Configuring Application Monitors
4.On one cluster node, include resources into resource groups. See Including Resources into Resource Groups.
5.Synchronize the cluster configuration. See Synchronizing the HACMP Cluster Configuration.
6.View the HACMP cluster configuration. See Displaying the HACMP Cluster Configuration.
7.Start the HACMP for Linux cluster services on the cluster nodes. When you do so, HACMP will activate the resource group with the application, and will start monitoring it for high availability. See Starting HACMP Cluster Services.
Defining a Cluster Name
Before starting to configure a cluster:
•Make sure that you added all necessary entries to the /etc/hosts file on each machine that will serve as a cluster node. See Planning IP Networks and Network Interfaces.
•Make sure that WebSMIT is installed and can be started on one of the nodes. See Installing and Configuring WebSMIT.
•Log in to WebSMIT. See Starting WebSMIT.
The only step necessary to configure a cluster is to assign the cluster name. When you assign a name to your cluster in WebSMIT, HACMP associates this name with the HACMP-assigned cluster ID.
To assign a cluster name and configure a cluster:
1.Log in to a URL where WebSMIT is installed. The browser window displays the top-level WebSMIT screen.
2.In WebSMIT, select Extended Configuration > Extended Topology Configuration > Configure an HACMP Cluster > Add/Change/Show an HACMP Cluster and press Continue.
3.Enter field values as follows:
Cluster Name
Enter an ASCII text string that identifies the cluster. The cluster name can include alphanumeric characters and underscores, but cannot have a leading numeric. Use no more than 32 characters. Do not use reserved names. For a list of reserved names see List of Reserved Words.
4.Press Continue. If you are changing an existing cluster name, restart HACMP for changes to take effect.
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