> 2. Not sure if our Ceilometer only accept the signed-message, if it is case, how Ironic get the message trust for Ceilometer, and send the valid message which can be accepted by Ceilometer Collector? > I'm not sure it's appropriate for ironic to be sending messages using ceilometer's sample format. We receive data from the other projects using the more generic notification system, and that seems like the right tool to use here, too. Unless the other ceilometer devs disagree? agreed, depending on your target milestone i'd suggest keeping an eye on this bp as well: https://blueprints.launchpad.net/oslo/+spec/notification-structured cheers, gordon chung openstack, ibm software standards email: chungg [at] ca.ibm.com -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack-dev/attachments/20131126/94c18254/attachment.html>