HP XC System Software Administration Guide Version 3.0

System Monitoring with the Nagios GUI
The Nagios GUI displays a series of windows that provide system statistics. The following is a list of Nagios
menu items and their corresponding windows:
Corresponding WindowMenu Item
Tactical Monitoring OverviewTactical Overview
Service Status Details for All HostsService Detail
Host Status Details for All Host GroupsHost Detail
Service Overview for All Host GroupsStatus Overview
Status Summary for All Host GroupsStatus Summary
Status Grid for All Host GroupsStatus Grid
Network Map for All HostsStatus Map
You can find additional information on the Nagios application by selecting Documentation on the Nagios
menu.
Logging Node Events
This section describes how the HP XC system uses the syslog and syslogng_forward services to log
node events and how these events are arranged according to the syslog-ng.conf rules file.
Understanding the Event Logging Structure
The HP XC System Software uses aggregator nodes to log events from clients. Aggregator node assignments
are made when the HP XC System Software is installed and configured. Each node in the HP XC system is
assigned to an aggregator node. One of the aggregator nodes is designated the master aggregator node.
Figure 6-7. illustrates this structure.
Figure 6-7. Aggregator and Client Nodes Structure Aggregator and Client Nodes Structure
Client
Node
Client
Node
Client
Node
Client
Node
Client
Node
Client
Node
Aggregator
Node
Client
Node
Client
Node
Client
Node
Aggregator
Node
Master
Aggregator
Node
Each node runs the syslogd daemon and passes events of priority warning or higher to its corresponding
aggregator node; aggregator nodes also run the syslogd daemon and pass their own events to the master
aggregator node.
Each aggregator node runs the syslogng_forward service, and writes the events it receives from its clients
to the /hptc_cluster/adm/logs/aggregator_nodename.log file, where nodename is the node name
of the aggregator. The aggregator nodes forward their clients' events to the master aggregator node, which
produces a consolidated log file, /hptc_cluster/adm/logs/consolidated.log.
The assignment of regional and global nodes is made during the execution of the gconfig utility during
installation. You can determine which nodes are the regional nodes with the shownode command:
# shownode config syslogng_forward
The shownode command identifies the nodes that supply the syslogng_forward service. The following
command returns all the names of the nodes that provide this service:
# shownode servers syslogng_forward
syslogng_forward: n[3-4]
74 Monitoring the System