Designing Disaster Tolerant High Availability Clusters, 10th Edition, March 2003 (B7660-90013)

Building a Continental Cluster
Maintaining a Continental Cluster
Chapter 5266
3. Edit the ContinentalClusters configuration ASCII file to add or
remove the node in the cluster.
4. For added nodes, ensure the the /etc/opt/cmom/cmomhosts file is
set up correctly on the new node. Refer to “Preparing Security Files”
on page 211. Ensure that the /.rhosts file on all nodes (including
the new node) contains an entry allowing write access by the host on
which you are running the configuration commands.
5. Check and apply the configuration using the cmcheckconcl and
cmapplyconcl commands.
6. Remove entries from the /.rhosts file if desired.
7. Restart the monitor packages on both clusters.
8. View the status of the continental cluster.
# cmviewconcl
Adding a Package to the Continental Cluster
To add a new package for possible recovery to the ContinentalClusters
configuration, you must first configure a new primary package and
recovery package, then you must add a new recovery group to the
ContinentalClusters configuration file. In addition, you must ensure that
data replication is provided for the new package either through
hardware or software.
Adding a new package does not require you to bring down either cluster.
However, in order to implement the new configuration, you must
1. Configure the new primary and recovery packages by editing the new
package configuration files and control scripts.
2. Use the ServiceGuard cmapplyconf command to add the primary
package to one cluster, and the recovery package to the other cluster.
3. Provide the appropriate data replication for the new package.
4. Create the new recovery group in the ContinentalClusters
configuration file.
5. Ensure that the /.rhosts file on all nodes contains an entry
allowing write access by the host on which you are running the
configuration commands.
6. Halt the monitor packages on both clusters.