Learning Nagios 4. For system administrators who want a fast, easily understood introduction to Nagios 4, this is the perfect book. Get to grips with the latest version of this powerful monitoring tool and transform the stability of your whole system Wojciech Kocjan

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• Learning Nagios 4
  • Table of Contents
  • Learning Nagios 4
  • Credits
  • About the Author
  • About the Reviewers
  • www.PacktPub.com
    • Support files, eBooks, discount offers and more
      • Why Subscribe?
      • Free Access for Packt account holders
  • Preface
    • What this book covers
    • What you need for this book
    • Who this book is for
    • Conventions
    • Reader feedback
    • Customer support
      • Downloading the example code
      • Errata
      • Piracy
      • Questions
  • 1. Introducing Nagios
    • Understanding the basics of Nagios
      • The benefits of monitoring resources
      • Main features
    • Soft and hard states
    • Whats new in Nagios 4.0
    • Summary
  • 2. Installing Nagios 4
    • Installation
      • Upgrading from previous versions
      • Installing prerequisites
      • Obtaining Nagios
      • Setting up users and groups
      • Compiling and installing Nagios
      • Compiling and installing Nagios plugins
      • Setting up Nagios as a system service
      • Resolving errors with script for Nagios system service
    • Configuring Nagios
      • Creating the main configuration file
      • Understanding macro definitions
      • Configuring hosts
      • Configuring host groups
      • Configuring services
      • Configuring service groups
      • Configuring commands
      • Configuring time periods
      • Configuring contacts
      • Configuring contact groups
      • Verifying the configuration
      • Understanding notifications
      • Templates and object inheritance
    • Summary
  • 3. Using the Nagios Web Interface
    • Setting up the web interface
      • Configuring the web server
      • Creating an administrative user for Nagios
      • Accessing the web interface
      • Troubleshooting
    • Using the web interface
      • Checking the tactical overview
      • Viewing the status map
    • Managing hosts
      • Checking statuses
      • Viewing host information
    • Managing services
      • Checking statuses
      • Viewing service information
    • Managing downtime
      • Checking downtime statuses
      • Scheduling downtime
    • Managing comments
    • Nagios information
      • Viewing process information
      • Checking performance information
    • Generating reports
    • Changing the look of the Nagios web interface
    • Third-party Nagios web interfaces
    • Summary
  • 4. Using the Nagios Plugins
    • Understanding how checks work
    • Monitoring using the standard network plugins
      • Testing the connection to a remote host
      • Testing the connectivity using TCP and UDP
    • Monitoring the e-mail servers
      • Checking the POP3 and IMAP servers
      • Testing the SMTP protocol
    • Monitoring network services
      • Checking the FTP server
      • Verifying the DHCP protocol
      • Monitoring the Nagios process
      • Testing the websites
    • Monitoring the database systems
      • Checking MySQL
      • Checking PostgreSQL
      • Checking Oracle
      • Checking other databases
    • Monitoring the storage space
      • Checking the swap space
      • Monitoring the disk status using SMART
      • Checking the disk space
      • Testing the free space for remote shares
    • Monitoring the resources
      • Checking the system load
      • Checking the processes
      • Monitoring the logged-in users
    • Monitoring other operations
      • Checking for updates with APT
      • Monitoring the UPS status
      • Gathering information from the lm-sensors
      • Using the dummy check plugin
      • Manipulating other plugins' output
    • Additional and third-party plugins
      • Monitoring the network software
      • Using third-party plugins
    • Summary
  • 5. Advanced Configuration
    • Creating maintainable configurations
    • Configuring the file structure
    • Defining the dependencies
      • Creating the host dependencies
      • Creating the service dependencies
    • Using the templates
      • Creating the templates
      • Inheriting from multiple templates
    • Using the custom variables
    • Understanding flapping
    • Summary
  • 6. Notifications and Events
    • Creating effective notifications
      • Using multiple notifications
      • Sending instant messages via Jabber
      • Notifying users with text messages
      • Integrating with HipChat
    • Understanding escalations
      • Setting up escalations
      • Understanding how escalations work
    • Sending commands to Nagios
      • Adding comments to hosts and services
      • Scheduling host and service checks
      • Modifying custom variables
    • Creating event handlers
      • Restarting services automatically
      • Modifying notifications
    • Using adaptive monitoring
    • Summary
  • 7. Passive Checks and NSCA
    • Understanding passive checks
      • Configuring passive checks
      • Sending passive check results for hosts
      • Sending passive check results for services
      • Troubleshooting errors
    • Using NSCA
      • Downloading NSCA
      • Compiling NSCA
      • Configuring the NSCA server
      • Sending results over NSCA
      • Configuring NSCA for secure communication
    • Summary
  • 8. Monitoring Remote Hosts
    • Monitoring over SSH
      • Configuring the SSH connection
      • Using the check_by_ssh plugin
      • Performing multiple checks
      • Troubleshooting the SSH-based checks
    • Monitoring using NRPE
      • Obtaining NRPE
      • Compiling NRPE
      • Configuring the NRPE daemon
      • Setting up NRPE as a system service
      • Configuring Nagios for NRPE
      • Using command arguments with NRPE
      • Troubleshooting NRPE
    • Comparing NRPE and SSH
    • Alternatives to SSH and NRPE
    • Summary
  • 9. Monitoring using SNMP
    • Introducing SNMP
      • Understanding data objects
    • Working with SNMP and MIB
      • Using graphical tools
    • Setting up an SNMP agent
    • Using SNMP from Nagios
      • Receiving traps
      • Using additional plugins
    • Summary
  • 10. Advanced Monitoring
    • Monitoring Windows hosts
      • Setting up NSClient++
      • Performing tests using check_nt
      • Performing checks with NRPE protocol
      • Performing passive checks using NSCA Protocol
    • Understanding distributed monitoring
      • Introducing obsessive notifications
      • Configuring Nagios instances
      • Performing freshness checking
    • Using templates for distributed monitoring
      • Creating the host and service objects
      • Customizing checks with custom variables
    • Summary
  • 11. Programming Nagios
    • Introducing Nagios customizations
    • Programming in C with libnagios
    • Creating custom active checks
      • Testing the correctness of the MySQL database
      • Monitoring local time with a time server
      • Writing plugins correctly
    • Checking websites
    • Virtualization and clouds
      • Monitoring VMware
      • Monitoring Amazon Web Services
    • Writing commands to send notifications
    • Managing Nagios
      • Using passive checks
    • Summary
  • 12. Using the Query Handler
    • Introducing the query handler
      • Communicating with the query handler
      • Using the query handler programmatically
    • Using the core service
    • Introducing Nagios Event Radio Dispatcher
      • Displaying real-time status updates
      • Displaying checks using Gource
    • Summary
  • Index

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