Ceilometer

Ceilometer Architecture

February 5, 2015 // 2 Comments

Ceilometer Architecture The following figure describes the main components of the Ceilometer sub-system. Let’s briefly review the components from left to right. The compute agent runs on each compute node and polls statistics mainly via libvirt. The central agent runs centrally and polls statistics of the RESTful APIs of nova, glance,...[READ MORE]

OpenStack Architecture and Services

December 1, 2014 // 7 Comments

Openstack is consisted of several core projects, Nova for Compute, Glance for Images, Cinder for Block Storage, Keystone for Identity, Neutron for Networking, and additional optional services. Each project exposes all it’s capabilities over RESTful API. The services inner-communicate over RESTful API calls, so when a service requires resources...[READ MORE]