Add optional host to ceilometer.conf

By default cfg.CONF.host is the `hostname` of local node, however, not all envs
register their hosts by the fqdn.  This allows a configurable attr to add to
the ceilometer.conf

Change-Id: If80cd5264a02eeb7c94655716839642dd7993906

CHANGELOG.md

@@ -3,6 +3,11 @@ openstack-metering Cookbook CHANGELOG
 This file is used to list changes made in each version of the openstack-metering cookbook.
 
 
+v7.0.2
+------
+### Improvement
+- Add optional host to the ceilometer.conf
+
 v7.0.1
 ------
 ### Bug

metadata.rb

@@ -4,7 +4,7 @@ maintainer_email "cookbooks@lists.tfoundry.com"
 license          "Apache 2.0"
 description      "The OpenStack Metering service Ceilometer."
 long_description IO.read(File.join(File.dirname(__FILE__), 'README.md'))
-version          "7.0.1"
+version          "7.0.2"
 
 recipe "openstack-metering::agent-central", "Installs agent central service."
 recipe "openstack-metering::agent-compute", "Installs agent compute service."

templates/default/ceilometer.conf.erb

@@ -1,4 +1,7 @@
 [DEFAULT]
+<% if node["openstack"]["metering"]["host"] %>
+host = <%= node["openstack"]["metering"]["host"] %>
+<% end %>
 os_auth_url = <%= @auth_uri %>
 os_tenant_name = <%= @service_tenant_name %>
 os_password = <%= @service_pass %>