Virtualization can also work well in conjunction with centralized CI services, providing the ability to spin up new virtual machines from stored baseline images at the press of a button. You can use virtualization to make provisioning new environments a completely automated process, which can be self-serviced by delivery teams. It also ensures that builds and deployments always run on a consistent, baseline version of these environments. This has the happy effect of removing continuous integration environments that are “works of art,” having accumulated software, libraries, and configuration
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