HP XC System Software Administration Guide Version 4.0

Table Of Contents
8 Monitoring the System with Nagios........................................................................105
8.1 Nagios Overview...........................................................................................................................105
8.1.1 Nagios Components..............................................................................................................106
8.1.2 Nagios Hosts..........................................................................................................................106
8.1.3 Nagios Plug-Ins.....................................................................................................................106
8.1.4 Nagios Web Interface.............................................................................................................107
8.1.5 Nagios Files...........................................................................................................................107
8.2 Using the Nagios Web Interface....................................................................................................107
8.2.1 Accessing the Nagios Web Interface.....................................................................................107
8.2.2 Using the Nagios Tactical Overview To View Network Health............................................110
8.2.3 Using the Nagios Service Detail View To View Nagios Hosts and Their Services...............111
8.2.4 Using the Nagios Service Problems View To Display Hosts and Services That Are
Experiencing Problems..................................................................................................................112
8.3 Adjusting the Nagios Configuration.............................................................................................114
8.3.1 Stopping and Restarting Nagios...........................................................................................115
8.3.2 Updating the Nagios Configuration.....................................................................................115
8.3.3 Forwarding Nagios e-mail Alerts..........................................................................................116
8.3.4 Changing Sensor Thresholds.................................................................................................117
8.3.5 Adjusting the Time Allotted for Metrics Collection..............................................................118
8.3.5.1 Global Service Check Timeout Limit............................................................................118
8.3.6 Changing the Default Nagios User Name.............................................................................119
8.3.7 Disabling Individual Nagios Plug-Ins...................................................................................120
8.4 Configuring Nagios on HP XC Systems........................................................................................120
8.4.1 Monitored Nagios Services...................................................................................................121
8.4.2 Nagios Default Settings.........................................................................................................123
8.4.3 Understanding Nagios Alert Messages.................................................................................125
8.4.4 System Event Log Monitoring...............................................................................................126
8.4.4.1 Understanding the System Event Log...........................................................................126
8.4.4.2 System Event Log Configuration..................................................................................126
8.4.4.3 Additional Optional Configuration..............................................................................126
8.5 Using the Nan Notification Aggregator and Delimiter To Control Nagios Messages.................127
8.6 Nagios Report Generator Utility...................................................................................................127
8.7 Modifying Nagios To Effect Changes............................................................................................130
9 Network Administration............................................................................................131
9.1 Network Address Translation Administration.............................................................................131
9.2 Network Time Protocol Service.....................................................................................................132
9.3 Changing the External IP Address of a Head Node.....................................................................133
9.4 Modifying Sendmail......................................................................................................................133
9.5 Bonding Ethernet Network Interface Cards for Failover..............................................................133
10 Managing Patches and RPM Updates..................................................................137
10.1 Sources for Software Packages and Information.........................................................................137
10.2 Digital Signature..........................................................................................................................137
10.3 Downloading and Installing Patches...........................................................................................138
10.4 Rebuild Kernel Dependent Modules...........................................................................................138
10.5 Rebuilding Serviceguard Modules..............................................................................................139
11 Distributing Software Throughout the System........................................................141
11.1 Overview of the Image Replication and Distribution Environment...........................................141
11.2 Installing and Distributing Software Patches..............................................................................142
11.3 Adding Software or Modifying Files on the Golden Client........................................................143
6 Table of Contents