56 lines
1.7 KiB
Ruby
56 lines
1.7 KiB
Ruby
#
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# persistent_crontab_minutes.rb
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#
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require 'md5'
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module Puppet::Parser::Functions
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newfunction(:persistent_crontab_minutes, :type => :rvalue) do |arguments|
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raise(Puppet::ParseError, "Wrong number of arguments " +
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"given (#{arguments.size} for 2)") if arguments.size < 2
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value = 0
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job = arguments[0]
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host = arguments[1]
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environment = Puppet[:environment]
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# We select first directory that exists. This might not be the best idea ...
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modules = Puppet[:modulepath].split(':').select { |i| File.exists?(i) }.first
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raise(Puppet::ParseError, "Unable to determine the storage " +
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"directory for Puppet modules") unless modules
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# Prepare the file where we store current value ...
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file = "/puppet/state/crontab/#{host}-#{job}.minutes"
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file = File.join(modules, file)
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if FileTest.exists?(file)
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File.open(file, 'r') { |f| value = f.read.to_i }
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raise(Puppet::ParseError, "The value for minutes in the file `%s' " +
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"is out of the range from 0 to 59 inclusive") unless value < 60
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else
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#
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# Pick a random number based on the job and host name. This will yield
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# the same value for exactly the same combination of the job and host name.
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#
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value = MD5.new(job_name + host).to_s.hex % 60
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# Minutes are from 0 to 59 inclusive ...
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value = value < 60 ? value : 59
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File.open(file, 'w') { |f| f.write(value) }
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end
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# Tell Puppet to keep an eye on this file ...
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parser = Puppet::Parser::Parser.new(environment)
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parser.watch_file(file) if File.exists?(file)
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return value
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end # def newfunction
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end # module Puppet::Parser::Functions
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# vim: set ts=2 sw=2 et :
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