NagiosConfig¶ ↑

NagiosConfig provides tools to parse, manipulate, generate and output Nagios configuration files using Ruby.

NagiosConfig::Parser will parse both the object and main style Nagios configuration files, and has both a streaming API and the ability to produce a AST/DOM-like structure.

NagiosConfig::Builder is a simple DSL for generating Nagios config files using Ruby

NagiosConfig::Formater will take the data structures produced by the parser and builder and output them in the format of a Nagios config file.

Say for example you decided you want all your host names uppercase

require 'rubygems'
require 'nagios_config'

host_config = nil
File.open("hosts.cfg") do |f|
  host_config = NagiosConfig::Parser.new.parse(f)
end

host_config.defines do |node|
  if node.type.value == "host"
    variable = node.variables.find {|node| node.name.value == "hostname"}
    variable.val.value.upcase! if variable
  end
end

File.open("hosts.cfg", "w") do |f|
  NagiosConfig::Formatter.new(f).format(host_config)
end