By Wojciech Kocjan
From the technical point of view the booklet is easily written. i might even enterprise to claim the e-book is excellent for individuals simply entering into Nagios tracking, because it is going from a easy organize to on-fly configuration adjustments with occasion handlers. i'd, if in simple terms the ebook wasn't missing lots by way of modifying. i am sorry to assert that, however the variety of poorly phrased sentences is vastly excessive, in particular for a UK-based publishing corporation. from time to time I needed to re-read a sentence a few times simply to comprehend what's approximately, which makes it a piece difficult to learn yet you will get used to it, and if you happen to do you will get loads of useful details from this book.
Although for my part this books yearns for a few enhancing i will be able to (with a transparent moral sense) suggest it to a person deploying Nagios in his IT setting. no matter if you have already got a operating Nagios configuration you'll most likely bump into a few strong principles the following that will help you make it extra maintainable or just extra fitted to your company wishes. i do know I did.
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Extra info for Learning Nagios 3.0
For security reasons, the $USERn$ variables are also not passed to commands as environment variables. Configuring Hosts Hosts are objects that describe machines that should be monitored—either physical hardware or virtual machines. A host consists of a short name, a descriptive name, and an IP address. The host also tells Nagios when and how the system should be monitored, as well as who should be contacted with regards to any problems related to this host. It also specifies how often the host should be checked, how retrying the checks should be handled, and how often should a notification about problems be sent out.
Throughout all configuration examples in this book, we use a directory structure. A separate directory is used for each object type and similar objects are grouped within a single file. For example, all command definitions are stored in the commands/ subdirectory. cfg files. cfg. cfg file: check_external_commands=1 interval_length=60 accept_passive_service_checks=1 accept_passive_host_checks=1 If any of the options are set to a different value, change them, and add them to the end of the file, if they are not currently present in it.
Even though it is recommended to use downtimes, it is sometimes useful to just remove all entries from Nagios configuration. Throughout all configuration examples in this book, we use a directory structure. A separate directory is used for each object type and similar objects are grouped within a single file. For example, all command definitions are stored in the commands/ subdirectory. cfg files. cfg. cfg file: check_external_commands=1 interval_length=60 accept_passive_service_checks=1 accept_passive_host_checks=1 If any of the options are set to a different value, change them, and add them to the end of the file, if they are not currently present in it.