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 More computer ebooks Networking Nagios System and Network Monitoring - San Francisco
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 The first part of this book deals with getting Nagios up and running with a simple configuration, but one that is sufficient for many uses, as quickly as possible. This is why Chapters 1 through 3 do not have detailed descriptions and treatments of all options and features. These are examined in the second part of the book.Chapter 4 looks at the details of service and host checks, and in particular introduces their dependency on network topologies. The options available to Nagios for implementing service checks and obtaining their results is described in Chapter 5. This is followed by the presentation of individual standard plugins and a number of additional, freely obtainable plugins: Chapter 6 takes a look at the plugins that inspect the services of a network protocol directly from the Nagios host, while Chapter 7 summarizes plugins that need to be installed on the machine that is being monitored, and for which Nagios needs additional utilities to get them running. Several auxiliary plugins, which do not perform any tests themselves, but manipulate already established results, are introduced in Chapter 8. Two utilities that Nagios requires to run local plugins on remote hosts are introduced in the two subsequent chapters: in Chapter 9 the SSH is described, while Chapter 10 introduces a daemon developed specifically for Nagios. Wherever networks are being monitored, SNMP also needs to be implemented. Chapter 11 not only describes SNMP-capable plugins but also examines the protocol and the SNMP world itself in detail, providing the background knowledge needed for this. The Nagios notification system is introduced Chapter 12, which also deals with notification using SMS, escalation management, and taking account of dependencies. The interface for external commands is discussed in Chapter 13; this forms the basis of other Nagios mechanisms, such as the Nagios Service Check Acceptor (NSCA), a client-server mechanism for transmitting passive test results, covered in Chapter 14. The use of this is shown in two concrete examples—integrating syslog-ng and processing SNMP traps. NSCA is also a requirement for distributed monitoring, discussed in Chapter 15. Even though you may have already used the Web interface, you might still be wondering about all the detailed options that this offers. Chapter 16 tries to answer this question as completely as possible, supported by very helpful screenshots. I also describes a series of parameters which until now have not been documented anywhere, except in the source code. Although in its operation, Nagios concentrates primarily on traffic light signals, there are ways of evaluating and representing the performance data provided by plugins, which are described in detail in Chapter 17. Networks are rarely homogeneous, that is, equipped only with Linux and other Unix-based operating systems. For this reason Chapter 18 demonstrates what utilities can be used to integrate and monitor Windows systems. Chapter 19 uses the example of a low-cost hardware sensor to show how room temperature and humidity can be monitored simply yet effectively. Nagios can also monitor proprietary commercial software, as long as mechanisms are available which can query states of the system integrated into a plugin. In Chapter 20, this is described using an SAP-R/3 system. Free downloadable networking ebook: Nagios System and Network Monitoring
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