This chapter describes what you need to know before you begin administering the Sun Cluster Geographic Edition software. Here you also learn about the Sun Cluster infrastructure that is required by the Sun Cluster Geographic Edition software. You also can find here common Sun Cluster concepts and tasks you need to understand before administering the Sun Cluster Geographic Edition software. This chapter also provides an example configuration that is used throughout this guide to illustrate the common Sun Cluster Geographic Edition administration tasks.
This chapter discusses the following topics:
Overview of Sun Cluster Geographic Edition Administration Tasks
Example Sun Cluster Geographic Edition Cluster Configuration
You must be an experienced Sun Cluster administrator to administer Sun Cluster Geographic Edition software.
This section describes some specific Sun Cluster administration topics that you need to understand before you administer Sun Cluster Geographic Edition software.
You use either the scrgadm command or the SunPlex Manager to create failover and scalable resource groups.
For more information about administering resources and resource groups in Sun Cluster software, see the Sun Cluster Data Services Planning and Administration Guide for Solaris OS.
The logical hostname is a special high availability (HA) resource. The geoadm start command configures the logical hostname that corresponds to the cluster name. The IP address and host maps for the logical hostname must be set up before you run this command. Before assigning hostnames, familiarize yourself with the legal names and values described in Appendix B, Legal Names and Values of Sun Cluster Geographic Edition Entities.
For more information about using the geoadm start command , see Enabling the Sun Cluster Geographic Edition Software.
If you are using Sun StorEdgeTM Availability Suite 3.2 for data replication, one logical hostname is created for each device group to be replicated. For more information, see Chapter 6, Replicating Data With Sun StorEdge Availability Suite 3.2.1 Software.
The following table lists the Sun Cluster and Sun Cluster Geographic Edition components that need to be assigned IP addresses. Add these IP addresses to the following locations:
All naming services that are being used
The local /etc/inet/hosts file on each cluster node, after you install Solaris software
For more information about configuring the IP address and host maps during the installation of Sun Cluster software, refer to Chapter 2, Installing and Configuring Sun Cluster Software, in Sun Cluster Software Installation Guide for Solaris OS.
A device group is a hardware resource that is managed by the Sun Cluster software. A device group is a type of global device that is used by the Sun Cluster software to register device resources, such as disks. A device group can include the device resources of disks, Solaris Volume Manager disksets, and VERITAS Volume Manager disk groups.
For information about configuring device groups in Sun Cluster software, refer to Chapter 4, Administering Global Devices, Disk-Path Monitoring, and Cluster File Systems, in Sun Cluster System Administration Guide for Solaris OS.
The Sun Cluster Geographic Edition software configures Sun Cluster device groups to include replication.
For more information about configuring data replication in Sun Cluster Geographic Edition software, see Chapter 6, Replicating Data With Sun StorEdge Availability Suite 3.2.1 Software and Chapter 9, Replicating Data With Hitachi TrueCopy Software.
This section provides a starting point for administering the Sun Cluster Geographic Edition software. It contains the following topics:
Before you begin administering the Sun Cluster Geographic Edition software, you must identify the Sun Cluster installations you need to host protection groups. Then, you need to adjust the Sun Cluster configuration and environment to support the formation of partnerships and protection groups with the Sun Cluster Geographic Edition software. The following table describes these prerequisite tasks.
Table 2–2 Sun Cluster Geographic Edition Prerequisite Tasks
Task |
Description |
|
---|---|---|
Set the SC-clustername to the cluster name you want to use with the Sun Cluster Geographic Edition software. |
Use the scconf(1M) command. For more information, see How to Enable Sun Cluster Geographic Edition Software. |
|
Set up the IP address and host maps for the cluster that is enabled to run Sun Cluster Geographic Edition software. | ||
Install and configure your data replication product. |
See the Sun StorEdge Availability Suite 3.2.1 or Hitachi TrueCopy documentation. This step is required before you can create protection groups with the geopg create command. |
|
Port and configure application configuration and corresponding resource groups on clusters that are candidates for partnership. |
You can use the Sun Cluster scsnapshot tool to facilitate porting of application resource groups. See Creating and Modifying a Partnership for more information. |
|
Enable the common agent container on all the nodes of both clusters. |
After you have completed the prerequisite administration tasks, you can install, configure, and administer the Sun Cluster Geographic Edition software as described in the following table.
Table 2–3 Sun Cluster Geographic Edition Administration Tasks
The following figure describes an example Sun Cluster Geographic Edition cluster configuration that is used throughout this guide to illustrate the Sun Cluster Geographic Edition administration tasks. The primary cluster, cluster-paris contains two nodes, phys-paris–1 and phys-paris-2. The secondary cluster, cluster-newyork, also contains two nodes, phys-newyork-1 and phys-newyork-2.