Class: Deadpool::CommandLineServer

Inherits:
Object
  • Object
show all
Defined in:
lib/deadpool/command_line_server.rb

Instance Method Summary collapse

Constructor Details

#initialize(argv) ⇒ CommandLineServer

Returns a new instance of CommandLineServer.



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# File 'lib/deadpool/command_line_server.rb', line 13

def initialize(argv)
  @argv     = argv
end

Instance Method Details

#execute_command(options) ⇒ Object 



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# File 'lib/deadpool/command_line_server.rb', line 80

def execute_command(options)
  case options[:command]
  when :help
    help
  when :full_report
    full_report options
  when :nagios_report
    nagios_report options
  when :promote_server
    promote_server options
  when :stop
    stop options
  else
    help
  end
end

#full_report(options) ⇒ Object 



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# File 'lib/deadpool/command_line_server.rb', line 105

def full_report(options)
  puts send_command_to_deadpool_server :command => 'full_report'
end

#help(message = nil) ⇒ Object 



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# File 'lib/deadpool/command_line_server.rb', line 97

def help(message=nil)
  unless message.nil?
    puts message
  end
  puts @option_parser.help
  exit 4
end

#nagios_report(options) ⇒ Object 



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# File 'lib/deadpool/command_line_server.rb', line 109

def nagios_report(options)
  response = send_command_to_deadpool_server :command => 'nagios_report'
  puts response

  if (response.to_s =~ /^OK/) != nil
    exit 0
  elsif (response.to_s =~ /^WARNING/) != nil
    exit 1
  elsif (response.to_s =~ /^CRITICAL/) != nil
    exit 2
  elsif (response.to_s =~ /^UNKNOWN/) != nil
    exit 3
  else
    exit 4
  end
end

#parse_command_line ⇒ Object 



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# File 'lib/deadpool/command_line_server.rb', line 24

def parse_command_line
  options               = Hash.new
  options[:command_count] = 0
  options[:config_path]     = '/etc/deadpool'

  @option_parser = OptionParser.new do |opts|
    opts.banner = "Usage: deadpool_hosts {help|full_report|nagios_report} [options]"

    opts.separator "Commands:"
    opts.on("-h", "--help", "Print this help message.") do |help|
      options[:command_count] += 1
      options[:command]        = :help
    end
    opts.on("--full_report", "Give the full system report.") do |full_report|
      options[:command_count] += 1
      options[:command]        = :full_report
    end
    opts.on("--nagios_report", "Report system state in Nagios plugin format.") do |nagios_report|
      options[:command_count] += 1
      options[:command]        = :nagios_report
    end
    opts.on("--promote_server", "Promote specified server to the master.") do |nagios_report|
      options[:command_count] += 1
      options[:command]        = :promote_server
    end
    opts.on("--stop", "Stop the server.") do |stop|
      options[:command_count] += 1
      options[:command]        = :stop
    end

    opts.separator "Options:"
    opts.on("--server=SERVER_LABEL", String, "primary_host or secondary_host.") do |server|
      options[:server] = server
    end
    opts.on("--pool=POOL_NAME", String, "Deadpool name to operate on.") do |pool|
      options[:pool] = pool
    end
    opts.on("--config_path=PATH", String, 
        "Path to configs and custom plugins. #{options[:config_path]} by default.") do |config_path|
      options[:config_path] = config_path
    end
  end

  remaining_arguments = @option_parser.parse! @argv

  unless remaining_arguments.empty?
    help "[#{remaining_arguments.join(' ')}] is not understood."
  end

  if options[:command_count] == 0
    help "You must specify a command."
  end

  return options
end

#promote_server(options) ⇒ Object 



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# File 'lib/deadpool/command_line_server.rb', line 126

def promote_server(options)
  error_messages = []

  if options[:pool].nil?
    error_messages << "Promoting server requires --pool argument."
  end

  if options[:server].nil?
    error_messages << "Promoting server requires --server argument."
  end
  
  unless error_messages.empty?
    help error_messages.join "\n"
  end

  puts send_command_to_deadpool_server :command => 'promote_server', :pool => options[:pool], :server => options[:server]
end

#run ⇒ Object 



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# File 'lib/deadpool/command_line_server.rb', line 17

def run
  @options = self.parse_command_line
  @config  = Deadpool::Helper.configure @options

  self.execute_command(@options)
end

#send_command_to_deadpool_server(options) ⇒ Object 



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# File 'lib/deadpool/command_line_server.rb', line 148

def send_command_to_deadpool_server(options)
  output = ''
  socket = TCPSocket.open(@config[:admin_hostname], @config[:admin_port])

  if socket
    socket.puts JSON.dump(options)
    while line = socket.gets
      output += line
    end
    socket.close
  else
    puts "Couldn't connect to deadpool server."
    exit 4
  end

  return output
end

#stop(options) ⇒ Object 



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# File 'lib/deadpool/command_line_server.rb', line 144

def stop(options)
  puts send_command_to_deadpool_server :command => 'stop'
end