May 2018
Intermediate to advanced
256 pages
7h 6m
English
Content preview from OpenStack for Architects - Second Edition
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Listening to OpenStack
There are two modes of internal communication in the OpenStack system. The first is to GET or POST to the REST API, and the second is to pull and push messages onto the message queue. Each of the services uses a combination of each; when the Nova API gets a request to provision a resource over the REST API, it passes that request along to the compute nodes via the message bus. They send back usage data over the bus, but they use the API to communicate with other services. These two modes of communication are also available for integration. Just as we can provision resources using the REST API, we can track their progress using the message bus.
The following code example uses the Kombu library in Python to attach to ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.