Class: Arnold::NodeManager

Inherits:
Object
  • Object
show all
Defined in:
lib/arnold/node_manager.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ NodeManager

Returns a new instance of NodeManager.



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# File 'lib/arnold/node_manager.rb', line 9

def initialize
  @datadir = "#{$CONFIG[:datadir]}/arnold"

  # make sure our data directories exist
  makedir "#{@datadir}"
  makedir "#{@datadir}/macaddr/"
  makedir "#{@datadir}/name/"
end

Instance Method Details

#load(guid) ⇒ Object 



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# File 'lib/arnold/node_manager.rb', line 18

def load(guid)
  begin
    data = YAML.load_file("#{@datadir}/#{guid}.yaml")
    return Arnold::Node.new(guid, data['name'], data['macaddr'], data['parameters'], data['classes'])
  rescue Exception
    puts "Invalid node! #{data.to_yaml}"
    return Arnold::Node.new(guid)
  end
end

#loadall ⇒ Object 



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# File 'lib/arnold/node_manager.rb', line 28

def loadall
  nodes=[]
  Dir.glob("#{@datadir}/*.yaml").each do |file|
    nodes << load(File.basename(file, '.yaml'))
  end
  nodes
end

#write(node) ⇒ Object 



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# File 'lib/arnold/node_manager.rb', line 36

def write(node)
  raise "Must have a name or mac address!" if (node.name.nil? and node.macaddr.nil?)

  if node.guid.nil?
    raise "Node name exists: please try again" if File.exists? "#{@datadir}/name/#{node.name}.yaml"
    raise "MAC address exists: please try again" if File.exists? "#{@datadir}/macaddr/#{node.macaddr}.yaml"
    node.guid = makeguid()
  else
    raise "Invalid Node" unless File.exists? "#{@datadir}/#{node.guid}.yaml"
  end

  data = {
    'parameters' => node.parameters,
    'classes'    => node.classes,
  }
  data['name']    = node.name if node.name
  data['macaddr'] = node.macaddr  if node.macaddr

  # duplicate the parameters hash. This allows hiera() calls to work as expected.
  # Principle of least surprise, ya know.
  data.merge! node.parameters

  File.open("#{@datadir}/#{node.guid}.yaml", 'w') do |file|
    file.write("###########################################################\n")
    file.write("### This file is managed by Arnold: the provisionator.  ###\n")
    file.write("# Any manual modifications will be gleefully overwritten. #\n")
    file.write("###########################################################\n")
    file.write(data.to_yaml)
  end

  make_link(node.guid, node.macaddr, :macaddr)
  make_link(node.guid, node.name, :name)
  remove_stale_symlinks("#{@datadir}/macaddr/")
  remove_stale_symlinks("#{@datadir}/name/")

  return node.guid
end