gistfile1.txt

execute 'remove-hostgroup-files' do
  action :run
  command 'rm -f /etc/nagios/conf.d/hostgroup_*'
  only_if 'ls /etc/nagios/conf.d/hostgroup_* >/dev/null 2>&1 || false'
end

def search_nodes(query = nil)
  nodes = search(:node, query).reject {|n| n.respond_to?(:empty?) && n.empty? }
  nodes.sort! {|a,b| a['name'] <=> b['name'] }
end

def search_nodes_with_environment(query = nil)
  search_nodes(query).inject({}) do |h,v|
    environment = n.chef_environment
    (h[environment] ||= []) << v unless environment[/\A_?default\z/]
    h
  end
end

search_nodes_with_environment.each do |env,hosts|
  template "/etc/nagios/conf.d/hostgroup_#{env}.cfg" do
    owner 'root'
    group 'root'
    mode '0644'
    source 'hostgroup.cfg.erb'
    variables(
      hosts: hosts,
      environment: env,
      hostname: node[:hostname],
      fqdn: node[:fqdn],
    )
    notifies :restart, 'service[nagios]', :delayed
  end
end

template '/etc/nagios/conf.d/hosts.cfg' do
  owner 'root'
  group 'root'
  mode '0644'
  source 'hosts.cfg.erb'
  variables(
    hosts: search_nodes, 
    hostname: node[:hostname],
    fqdn: node[:fqdn],
  )
  notifies :restart, 'service[nagios]', :delayed
end