Module: DOT

Defined in:
generators/gen_dot.rb

Overview

Produce a Graphviz dot file of the IB network. Render with dot -Tsvg -o file.svg file Nb. Our network is a bit large for this :)

Class Method Summary (collapse)

Class Method Details

+ (Object) gen(ib, file = 'iblinkinfo.dot', dot_cmd = nil)

Generate a dot formated file from the IBLinkinfo data for use with graphviz.

Parameters:

  • ib (IBLinkInfo) —

    The data derived from an iblinkinfo command, and parsed by the IBLinkInfo class parser

  • file (String) (defaults to: 'iblinkinfo.dot') —

    The name of the output file (produces the .dot file and a .png, if dot_cmd != nil)



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# File 'generators/gen_dot.rb', line 9

def self.gen(ib, file='iblinkinfo.dot', dot_cmd=nil)
  #Output dot graph of switches
  File.open(file, "w") do |fd|
    fd.puts <<-EOF
    digraph g {
    graph [
      rankdir = "TB"
      ratio = auto;
    ];
  EOF

    ib.switches.each do |k,v|
      fd.puts "\"#{k}\" [" #Node name
      fd.print "label=<<table><tr><td>\"#{v[1][9]}\"</td></tr>" #First port
      (2..36).each do |i|
        fd.print "<tr><td>#{v[i][9]}</td></tr>" #Other 35 ports
      end
      fd.print "</table>>\nshape = \"Mrecord\"\n"
      fd.puts "];"
    end

    @been_there = {}
    backbone = [ # These should be in a config file. Defined to make picture centered on the core.
      "MF0;ib0-is5200-a2-bip-m:IS5200/S01/U1",
      "MF0;ib0-is5200-a2-bip-m:IS5200/S02/U1",
      "MF0;ib0-is5200-a2-bip-m:IS5200/S03/U1",
      "MF0;ib0-is5200-a2-bip-m:IS5200/S04/U1",
      "MF0;ib0-is5200-a2-bip-m:IS5200/S05/U1",
      "MF0;ib0-is5200-a2-bip-m:IS5200/S06/U1",

      "MF0;ib0-is5300-c4-bip-m:IS5300/S01/U1",
      "MF0;ib0-is5300-c4-bip-m:IS5300/S02/U1",
      "MF0;ib0-is5300-c4-bip-m:IS5300/S03/U1",
      "MF0;ib0-is5300-c4-bip-m:IS5300/S04/U1",
      "MF0;ib0-is5300-c4-bip-m:IS5300/S05/U1",
      "MF0;ib0-is5300-c4-bip-m:IS5300/S06/U1",
      "MF0;ib0-is5300-c4-bip-m:IS5300/S07/U1",
      "MF0;ib0-is5300-c4-bip-m:IS5300/S08/U1",
      "MF0;ib0-is5300-c4-bip-m:IS5300/S09/U1",

      "MF0;ib-sx6036-a2-001-m:SX6036/U1",
      "MF0;ib-sx6036-a2-002-m:SX6036/U1",
      "MF0;ib-sx6036-a2-003-m:SX6036/U1",
      ]

    @sub_switches = backbone

    while @sub_switches != nil && @sub_switches.length > 0 do
      @next_layer = @sub_switches
      @sub_switches = []
      @next_layer.each do |l|
        process_switch(fd, l, ib.switches)
      end
    end

      fd.puts "}"
  end
  
  #system("#{dot_cmd} -Tpng -o #{file.gsub(/\..+$/,'')}.png -Tcmapx -o #{file.gsub(/\..+$/,'')}_map.html #{file}")  if dot_cmd != nil
  system("#{dot_cmd} -Tpng -o #{file.gsub(/\..+$/,'')}.png  #{file}")   if dot_cmd != nil
  
end

+ (Object) process_switch(fd, s, switches)

Process a switch

Parameters:

  • fd (File) —

    File descriptor for the output file

  • s (Array<Array>) —

    This switches port array

  • switches (Hash) —

    The other switches we know about, so we can reference information about them



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# File 'generators/gen_dot.rb', line 76

def self.process_switch(fd, s, switches)
  v = switches[s] #get port array
  if v == nil
    puts "***** switch #{s} not found"
    return
  end
  (1..36).each do |i| #Each switch is 36 ports
      target = v[i][9] #Potential target switch
      if switches[target] != nil && #It is a switch
        if  @been_there[s] == nil
          @been_there[s] = [target]
          go = true
        elsif  @been_there[s].member?(target) == false 
          @been_there[s] << target
          go = true
        end
        if  @been_there[target] == nil
          @been_there[target] = [s]
          go = true
        elsif  @been_there[target].member?(s) == false 
          @been_there[target] << s
          go = true
        end
        if go
          fd.puts "\"#{s}\" -> \"#{target}\"" #Dot link format, representing a physical linke between switches
          @sub_switches << target
        end
      end
  end
end