[chef] how to load a json object in a ruby block and pass to a template

[David Montgomery < >]

Hi

In a ruby block I am trying to load a json object and passing the hash to a template.  The json file  exists.  How to I load a json object do I cna pass to a

node[:neoservers] should look lie this [xxx.xxx.xxx.xxx,yyy.yyy.yyy.yyy]

ruby_block "stuff" do
    block do
      contents = File.read('/tmp/cluster_ipaddress')
      existing_nodes = JSON.parse(contents)
      require 'set'
      neoservers = [node[:ipaddress]] + existing_nodes
      neoservers = neoservers.to_set.to_a.sort
      node.default["neoservers"]=neoservers
    end
    action :run
end

template "/home/ubuntu/neo4j/conf/neo4j.properties" do
    path "/home/ubuntu/neo4j/conf/neo4j.properties"
    source "neo4j.properties.erb"
    owner "root"
    group "root"
    mode "0644"
    variables({
      :server_id => server_id, :neoservers => node[:neoservers]
      })
    #notifies :restart, "service[neo4j]"
    #action :nothing
end


================================================================================
Error executing action `create` on resource 'template[/home/ubuntu/neo4j/conf/neo4j.properties]'
================================================================================


Chef::Mixin::Template::TemplateError
------------------------------------
undefined method `join' for nil:NilClass


Resource Declaration:
---------------------
# In /var/chef/cache/cookbooks/neo4j/recipes/default.rb

110: template "/home/ubuntu/neo4j/conf/neo4j.properties" do
111:     path "/home/ubuntu/neo4j/conf/neo4j.properties"
112:     source "neo4j.properties.erb"
113:     owner "root"
114:     group "root"
115:     mode "0644"
116:     variables({
117:       :server_id => server_id, :neoservers => node[:neoservers]
118:       })
119:     #notifies :restart, "service[neo4j]"
120:     #action :nothing
121: end
122:



Compiled Resource:
------------------
# Declared in /var/chef/cache/cookbooks/neo4j/recipes/default.rb:110:in `from_file'

template("/home/ubuntu/neo4j/conf/neo4j.properties") do
  provider Chef::Provider::Template
  action "create"
  retries 0
  retry_delay 2
  path "/home/ubuntu/neo4j/conf/neo4j.properties"
  backup 5
  source "neo4j.properties.erb"
  variables {:server_id=>"20130328214635", :neoservers=>nil}
  cookbook_name "neo4j"
  recipe_name "default"
  owner "root"
  group "root"
  mode "0644"
end