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OpenStack Cloud Computing Cookbook by Kevin Jackson

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Creating custom CentOS images

For most uses, downloading pre-made Ubuntu or CentOS images will be good enough, as they provide an OS with minimal packages installed and are able to invoke extra commands once booted. Sometimes though, the images need extra work; perhaps they need extra disk space as part of their instance storage, or maybe they need to work with a third party where they expect certain tools or scripts to be present. Creating custom OS images for your cloud allows you to install instances just the way you need to.

Creating custom Linux images is more complex, as we have greater flexibility on how to use these images in our OpenStack Compute environment.

For this next section, we will look at creating the popular CentOS distribution ...

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