consul_template.xml.erb

<%
  require 'rexml/document'

  def build_node(e, name, attributes, text = nil)
    xe = REXML::Element.new(name)
    attributes.each do |name|
      xe.add_attribute name, e[name]
    end
    xe.text = text if text
    xe
  end

  def create_datacenters
    xdatacenters = REXML::Element.new 'datacenters'
    datacenters.each do |dc|
      xdc = REXML::Element.new 'datacenter'
      xdc.add_attribute 'name', dc
      xdc.add_attribute 'services', services(dc:dc).keys.count
      xdc.add_attribute 'nodes', nodes(dc:dc).count
      xdatacenters.add_element xdc
    end
    xdatacenters
  end

  def create_services
    xservices = REXML::Element.new 'services'
    xservices.add_attribute 'count', services.count
    services.each do |service_name, tags|
      xserv = REXML::Element.new 'service'
      xserv.add_attribute 'name', service_name
      xserv.add_attribute 'tags', tags.sort.join(',')
      xnodes = REXML::Element.new 'instances'
      xnodes.add_attribute 'count', service(service_name).count
      service(service_name).sort {|a,b| a['Node']['Node'] <=> b['Node']['Node'] }.each do |snode|
        xnode = REXML::Element.new 'service-instance'
        xnode.add_attribute 'id', snode['Node']['ID'] if snode['Node']['ID']
        xnode.add_attribute 'address', snode.service_address
        xnode.add_attribute 'name', snode['Node']['Name']
        xnode.add_attribute 'port', snode['Service']['Port'].to_i
        xnode.add_attribute 'tags', snode['Service']['Tags'].sort.join(',')
        xnode.add_attribute 'statuses', (snode['Checks'].map { |c| c['Status'] }.join(' '))
        xnodes.add_element xnode
      end
      xserv.add_element xnodes
      xservices.add_element xserv
    end
    xservices
  end

  def create_nodes
    xnodes = REXML::Element.new 'nodes'
    xnodes.add_attribute 'count', nodes.count
    nodes.sort {|a,b| a['Node'] <=> b['Node'] }.each do |snode|
      xnode = REXML::Element.new 'node'
      xnode.add_attribute 'id', snode['ID']
      xnode.add_attribute 'address', snode['Address']
      xnode.add_attribute 'name', snode['Node']
      xnodes.add xnode
    end
    xnodes
  end
  doc = REXML::Document.new '<consul-info/>'
  doc << REXML::XMLDecl.new(version='1.0', 'UTF-8')

  doc.root.add_element create_datacenters
  doc.root.add_element create_services
  doc.root.add_element create_nodes
  result = ''
  doc.write(result, 2)
%><%= result %>