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When a server environment is created using virtualization software or a cloud service, the number of servers tends to increase rapidly. Software installation and configuration are required every time a server is created. Further, synchronizing server configurations requires additional effort such as writing shell scripts.
In this article, we will describe how to build a server environment automatically using a relatively new software tool called Puppet. Although this tool is typically used to manage large-scale server infrastructure (such as a data center or a Web service with a large number of users), it can also be used to manage a small number of servers. However, Puppet is a newly developed tool, and the existing documentation and the articles on Puppet are still somewhat cursory.