Distributed Systems Administration Utilities User's Guide, Linux, March 2009

The wizard will set up and create a Serviceguard package for the consolidated logging service.
Make sure that this cluster’s MAX_CONFIGURED_PACKAGES value can accommodate the
additional package. For more information on this setting, please refer to the Managing Serviceguard
manual which is part of the Serviceguard documentation set.
The wizard first displays introductory paragraphs explaining log consolidation (wizard output
may wrap differently from what is shown here):
Consolidated logging (clog) lets you combine the log entries from multiple
remote systems into a single file. This feature is used to
consolidate syslog data from several systems. Each remote system
continues to write entries to its local syslog.log and additionally
forwards the entries to the consolidating host. The systems forwarding
log entries are consolidation clients. The system to which they send
entries is the consolidation server. In addition to syslog data,
clog can also consolidate arbitrary text log files.
In a Serviceguard cluster, clog can help you automate package log
file consolidation. Log consolidation is especially useful in a
Serviceguard cluster, because it enables you to look at a single
consolidated file instead of the per-member logs. The clog wizard needs
to be run only once in the cluster and not on each cluster member.
All cluster members should be up when running this wizard.
clog_wizard will prompt you for information to configure log file
consolidation. Some questions display a default answer in square
brackets. If you press <Return/Enter>, the clog_wizard uses the
default answer.
Press “Enter” to continue...
Press Enter.
Querying the system cluster_member for current status, one moment...
The next prompt is:
You can configure this cluster clustername as either a:
- Consolidation server
- Client that forwards logs to a remote consolidation server
Do you want to configure cluster_member as a Consolidation
Server? (y/n) [y]:
To configure this cluster as a log consolidation server, the wizard
will create a Serviceguard package called “clog”. The package
requires the following:
- Dedicated storage for failover between cluster members. The
consolidated logs will be stored here. This includes an LVM
volume group, LVM logical volume, a filesystem, filesystem
mount point, and the desired mount options. this storage
infrastructure needs to be configured cluster-wide before
proceeding.
- An IP address and subnet address pair for the package. IPv4
of IPv6 addresses can be used. The IP address should be registered
in DNS, if this cluster will consolidate logs from remote clients.
This should be appropriately configured on each cluster member before
proceeding with the consolidation server configuration.
Answer yes (y).
In a cluster, the wizard configures syslog-ng to be highly available using a Serviceguard
package. For consolidated logging, the package name is clog. The LVM storage configuration
and network configuration for the package must be set up before continuing or before running
the wizard. For additional details, refer to the section “Creating a Storage Infrastructure with
3.3 Log Consolidation Configuration 53