August 2016
Beginner to intermediate
182 pages
4h 26m
English
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Chapter 3. Image Management
In the preceding chapter, we looked at how identities are managed in OpenStack and how to authenticate to an OpenStack cluster. In this chapter, we will start to gather the resources necessary to launch an instance. The first resource we will work with is the image that an instance will use as its disk image when it is launched. Glance is the disk image management component in OpenStack. In this chapter, we'll look at how to register images with the image registry and how to build a custom cloud image.
Glance as a registry of images
At launch, a generic virtual machine requires a prebuilt disk image to boot from – some kind of storage that holds the operating system using which the virtual machine will run. Traditionally, ...
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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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.