HP Serviceguard Metrocluster manual Building the Continentalclusters configuration

2 Building the Continentalclusters configuration

To build a Continentalclusters configuration, complete the following list of steps:

1.Create a Serviceguard cluster at both the data center sites.

2.Establish the security credentials for Continentalclusters operation.

3.Create data replication between the two clusters.

4.If required, then create the volume groups or disk groups on the replicated disks.

5.Install and configure an application in the primary site using the replicated disks.

6.Install and configure a redundant copy of the application in the recovery site using the same replicated disks.

7.Package the primary and the recovery copy of the applications using Serviceguard and Continentalclusters package modules.

8.Configure a monitor package in the recovery cluster.

9.Specify the clusters, the cluster events with its notifications and the recovery groups in the Continentalclusters configuration ASCII file.

10.Validate and deploy the Continentalclusters configuration.

NOTE: This section provides information about configuring a single-instance application in a Continentalclusters environment. Complex workloads are configured in a Continentalclusters environment using Site Aware Disaster Tolerant Architecture (SADTA). Complex workloads are applications configured using multi-node and failover packages with dependencies. SAP and Oracle RAC database are some examples of complex workloads. For configuring a complex workload in a Continentalclusters environment using SADTA, see section “Configuring complex workloads in a Continentalclusters environment using SADTA” (page 43) .

Creating the Serviceguard clusters at both the sites

The clusters can be created using easy deployment method or the traditional deployment methods.

Easy deployment method

A cluster can be created in a single step using cmdeploycl command. The command takes in the nodes, the sites, and the lock disk/quorum server information. It produces and applies the produced configuration and then starts up the cluster as well.

The cmdeploycl command and options are as follows:

#cmdeploycl [-t] [-s site ]... [-n node ]... [-N net_template ] [-c clustername] [-q qs_host [qs_ip] -L locklun] [-cfs]

For example,

To create a single site cluster with nodes n1, n2 with a quorum server, run the following command:

# cmdeploycl -n n1 -n n2 -q qs.quorum.com

Traditional deployment method

The traditional approach of cluster deployment is used when there is a need to tune the cluster parameters specifically. First run the cmquerycl command to get the cluster configuration template, modify the parameter values as required and then validate the cluster configuration using cmcheckconf command.

Once the cluster configuration validation is completed, then apply the cluster configuration using cmapplyconf command.

#cmquerycl -v -C /etc/cmcluster/cluster.config -n node1 -n node2 -w full

10 Building the Continentalclusters configuration