Some embodiments provide a method for adapting a system configuration. The method identifies a first configuration for a first computer system. The method retrieves a configuration information for a second computer system from a library that stores configuration information that includes several operating systems and several kernels. The method defines a second configuration that is based on (i) the first configuration and (ii) the retrieved configuration information. The method hosts the second configuration at the second computer system. The second computer system is a computer system in several computer systems of a server hosting environment.