If you have previously worked with cloud platforms, you will be familiar with the distributed and decoupled nature of these systems. A decoupled distributed system relies on microservices to carry out specific tasks, each one exposing its own REST (Representational State Transfer) APIs. These microservices talk to each other through a lightweight messaging layer usually in the form of a message broker such as RabbitMQ or QPID. This is precisely how OpenStack works. Each major OpenStack component (Keystone, Glance, Cinder, Neutron, Nova, etc.) exposes a REST endpoint and the components and sub-components communicate via a message broker layer, such as… [Continue Reading]
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